/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-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 22:34:58,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 22:34:58,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 22:34:58,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 22:34:58,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 22:34:58,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 22:34:58,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 22:34:58,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 22:34:58,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 22:34:58,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 22:34:58,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 22:34:58,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 22:34:58,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 22:34:58,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 22:34:58,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 22:34:58,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 22:34:58,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 22:34:58,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 22:34:58,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 22:34:58,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 22:34:58,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 22:34:58,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 22:34:58,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 22:34:58,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 22:34:58,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-20 22:34:58,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 22:34:58,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 22:34:58,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 22:34:58,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 22:34:58,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 22:34:58,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 22:34:58,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 22:34:58,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 22:34:58,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 22:34:58,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 22:34:58,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 22:34:58,395 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 [2022-09-20 22:34:58,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 22:34:58,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 22:34:58,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 22:34:58,426 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 22:34:58,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 22:34:58,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 22:34:58,427 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 22:34:58,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 22:34:58,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 22:34:58,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 22:34:58,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 22:34:58,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 22:34:58,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 22:34:58,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 22:34:58,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 22:34:58,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 22:34:58,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 22:34:58,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 22:34:58,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 22:34:58,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 22:34:58,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 22:34:58,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 22:34:58,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 22:34:58,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:34:58,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 22:34:58,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 22:34:58,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 22:34:58,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 22:34:58,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 22:34:58,430 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 22:34:58,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 22:34:58,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 22:34:58,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 22:34:58,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 22:34:58,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 22:34:58,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 22:34:58,663 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 22:34:58,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-09-20 22:34:58,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15955ec82/6ca6b69f5ee4477384ea4a56b80aaddb/FLAG9526739a1 [2022-09-20 22:34:59,197 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 22:34:59,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-09-20 22:34:59,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15955ec82/6ca6b69f5ee4477384ea4a56b80aaddb/FLAG9526739a1 [2022-09-20 22:34:59,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15955ec82/6ca6b69f5ee4477384ea4a56b80aaddb [2022-09-20 22:34:59,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 22:34:59,513 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 22:34:59,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 22:34:59,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 22:34:59,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 22:34:59,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:34:59" (1/1) ... [2022-09-20 22:34:59,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c67ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:34:59, skipping insertion in model container [2022-09-20 22:34:59,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:34:59" (1/1) ... [2022-09-20 22:34:59,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 22:34:59,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 22:34:59,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-09-20 22:35:00,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:35:00,034 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 22:35:00,045 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-09-20 22:35:00,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:35:00,150 INFO L208 MainTranslator]: Completed translation [2022-09-20 22:35:00,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00 WrapperNode [2022-09-20 22:35:00,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 22:35:00,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 22:35:00,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 22:35:00,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 22:35:00,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,201 INFO L138 Inliner]: procedures = 364, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-09-20 22:35:00,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 22:35:00,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 22:35:00,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 22:35:00,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 22:35:00,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 22:35:00,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 22:35:00,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 22:35:00,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 22:35:00,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (1/1) ... [2022-09-20 22:35:00,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:35:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:35:00,248 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) [2022-09-20 22:35:00,254 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 [2022-09-20 22:35:00,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-09-20 22:35:00,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-09-20 22:35:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 22:35:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 22:35:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 22:35:00,287 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 22:35:00,439 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 22:35:00,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 22:35:00,603 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 22:35:00,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 22:35:00,609 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 22:35:00,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:35:00 BoogieIcfgContainer [2022-09-20 22:35:00,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 22:35:00,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 22:35:00,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 22:35:00,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 22:35:00,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 10:34:59" (1/3) ... [2022-09-20 22:35:00,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c40dda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:35:00, skipping insertion in model container [2022-09-20 22:35:00,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:35:00" (2/3) ... [2022-09-20 22:35:00,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c40dda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:35:00, skipping insertion in model container [2022-09-20 22:35:00,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:35:00" (3/3) ... [2022-09-20 22:35:00,618 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-09-20 22:35:00,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 22:35:00,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 22:35:00,632 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 22:35:00,664 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-09-20 22:35:00,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 97 transitions, 202 flow [2022-09-20 22:35:00,730 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2022-09-20 22:35:00,730 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 22:35:00,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-09-20 22:35:00,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 97 transitions, 202 flow [2022-09-20 22:35:00,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 86 transitions, 178 flow [2022-09-20 22:35:00,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 22:35:00,752 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;@15339a9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 22:35:00,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-09-20 22:35:00,772 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-09-20 22:35:00,772 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 22:35:00,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:00,773 INFO L208 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] [2022-09-20 22:35:00,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -266218155, now seen corresponding path program 1 times [2022-09-20 22:35:00,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:00,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009750346] [2022-09-20 22:35:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:35:00,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:00,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009750346] [2022-09-20 22:35:00,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009750346] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:35:00,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:35:00,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 22:35:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359509853] [2022-09-20 22:35:00,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:35:00,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 22:35:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 22:35:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 22:35:00,989 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 97 [2022-09-20 22:35:00,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 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) [2022-09-20 22:35:00,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:00,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 97 [2022-09-20 22:35:00,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:01,027 INFO L130 PetriNetUnfolder]: 2/80 cut-off events. [2022-09-20 22:35:01,028 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-20 22:35:01,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 80 events. 2/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 4/81 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2022-09-20 22:35:01,030 INFO L137 encePairwiseOnDemand]: 93/97 looper letters, 2 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2022-09-20 22:35:01,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 170 flow [2022-09-20 22:35:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 22:35:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 22:35:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 180 transitions. [2022-09-20 22:35:01,046 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9278350515463918 [2022-09-20 22:35:01,046 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 180 transitions. [2022-09-20 22:35:01,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 180 transitions. [2022-09-20 22:35:01,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:01,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 180 transitions. [2022-09-20 22:35:01,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.0) internal successors, (180), 2 states have internal predecessors, (180), 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) [2022-09-20 22:35:01,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-09-20 22:35:01,062 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-09-20 22:35:01,063 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 2 states and 180 transitions. [2022-09-20 22:35:01,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 170 flow [2022-09-20 22:35:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 22:35:01,074 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 162 flow [2022-09-20 22:35:01,075 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2022-09-20 22:35:01,080 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2022-09-20 22:35:01,080 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 162 flow [2022-09-20 22:35:01,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 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) [2022-09-20 22:35:01,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:01,081 INFO L208 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] [2022-09-20 22:35:01,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 22:35:01,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1025926754, now seen corresponding path program 1 times [2022-09-20 22:35:01,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:01,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063768605] [2022-09-20 22:35:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:01,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:35:01,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063768605] [2022-09-20 22:35:01,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063768605] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:35:01,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:35:01,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:35:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831206415] [2022-09-20 22:35:01,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:35:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:35:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:35:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:35:01,205 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 97 [2022-09-20 22:35:01,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-09-20 22:35:01,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:01,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 97 [2022-09-20 22:35:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:01,266 INFO L130 PetriNetUnfolder]: 2/90 cut-off events. [2022-09-20 22:35:01,266 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 22:35:01,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 90 events. 2/90 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 102. Up to 9 conditions per place. [2022-09-20 22:35:01,269 INFO L137 encePairwiseOnDemand]: 94/97 looper letters, 9 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-09-20 22:35:01,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 190 flow [2022-09-20 22:35:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:35:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:35:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-09-20 22:35:01,272 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8762886597938144 [2022-09-20 22:35:01,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-09-20 22:35:01,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-09-20 22:35:01,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:01,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-09-20 22:35:01,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2022-09-20 22:35:01,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-09-20 22:35:01,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-09-20 22:35:01,276 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 162 flow. Second operand 3 states and 255 transitions. [2022-09-20 22:35:01,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 190 flow [2022-09-20 22:35:01,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:35:01,278 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 174 flow [2022-09-20 22:35:01,278 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2022-09-20 22:35:01,279 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2022-09-20 22:35:01,279 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 174 flow [2022-09-20 22:35:01,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-09-20 22:35:01,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:01,280 INFO L208 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] [2022-09-20 22:35:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 22:35:01,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1556124652, now seen corresponding path program 1 times [2022-09-20 22:35:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:01,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234419674] [2022-09-20 22:35:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 22:35:01,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:01,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234419674] [2022-09-20 22:35:01,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234419674] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:35:01,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:35:01,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:35:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384310907] [2022-09-20 22:35:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:35:01,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:35:01,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:01,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:35:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:35:01,380 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 22:35:01,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2022-09-20 22:35:01,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:01,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 22:35:01,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:01,447 INFO L130 PetriNetUnfolder]: 2/97 cut-off events. [2022-09-20 22:35:01,447 INFO L131 PetriNetUnfolder]: For 2/9 co-relation queries the response was YES. [2022-09-20 22:35:01,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 97 events. 2/97 cut-off events. For 2/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 115. Up to 10 conditions per place. [2022-09-20 22:35:01,449 INFO L137 encePairwiseOnDemand]: 94/97 looper letters, 10 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-09-20 22:35:01,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 204 flow [2022-09-20 22:35:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:35:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:35:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2022-09-20 22:35:01,453 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8694158075601375 [2022-09-20 22:35:01,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2022-09-20 22:35:01,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2022-09-20 22:35:01,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:01,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2022-09-20 22:35:01,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2022-09-20 22:35:01,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-09-20 22:35:01,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-09-20 22:35:01,455 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 174 flow. Second operand 3 states and 253 transitions. [2022-09-20 22:35:01,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 204 flow [2022-09-20 22:35:01,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 22:35:01,458 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 184 flow [2022-09-20 22:35:01,458 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2022-09-20 22:35:01,459 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2022-09-20 22:35:01,459 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 184 flow [2022-09-20 22:35:01,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2022-09-20 22:35:01,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:01,460 INFO L208 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] [2022-09-20 22:35:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 22:35:01,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash -464838401, now seen corresponding path program 1 times [2022-09-20 22:35:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:01,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210901952] [2022-09-20 22:35:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:01,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 22:35:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210901952] [2022-09-20 22:35:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210901952] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:35:01,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500948826] [2022-09-20 22:35:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:01,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:01,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:35:01,555 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) [2022-09-20 22:35:01,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 22:35:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 22:35:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:35:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 22:35:01,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:35:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 22:35:01,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500948826] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:35:01,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:35:01,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-20 22:35:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833792368] [2022-09-20 22:35:01,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:35:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 22:35:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 22:35:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-20 22:35:01,843 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 22:35:01,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 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) [2022-09-20 22:35:01,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:01,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 22:35:01,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:01,944 INFO L130 PetriNetUnfolder]: 2/107 cut-off events. [2022-09-20 22:35:01,944 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-20 22:35:01,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 107 events. 2/107 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-09-20 22:35:01,948 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 10 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2022-09-20 22:35:01,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 240 flow [2022-09-20 22:35:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 22:35:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 22:35:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 732 transitions. [2022-09-20 22:35:01,951 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8384879725085911 [2022-09-20 22:35:01,951 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 732 transitions. [2022-09-20 22:35:01,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 732 transitions. [2022-09-20 22:35:01,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:01,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 732 transitions. [2022-09-20 22:35:01,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.33333333333333) internal successors, (732), 9 states have internal predecessors, (732), 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) [2022-09-20 22:35:01,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-09-20 22:35:01,958 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-09-20 22:35:01,961 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 184 flow. Second operand 9 states and 732 transitions. [2022-09-20 22:35:01,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 240 flow [2022-09-20 22:35:01,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 22:35:01,968 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 232 flow [2022-09-20 22:35:01,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=232, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2022-09-20 22:35:01,970 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2022-09-20 22:35:01,970 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 232 flow [2022-09-20 22:35:01,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 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) [2022-09-20 22:35:01,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:01,971 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:35:01,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 22:35:02,184 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 [2022-09-20 22:35:02,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 515943141, now seen corresponding path program 2 times [2022-09-20 22:35:02,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:02,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834515602] [2022-09-20 22:35:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:02,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-09-20 22:35:02,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834515602] [2022-09-20 22:35:02,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834515602] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:35:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246796580] [2022-09-20 22:35:02,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 22:35:02,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:35:02,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:35:02,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 22:35:02,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 22:35:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:35:02,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 22:35:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:35:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-09-20 22:35:02,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:35:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-09-20 22:35:02,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246796580] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:35:02,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:35:02,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-20 22:35:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518250704] [2022-09-20 22:35:02,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:35:02,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 22:35:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 22:35:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-20 22:35:02,494 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 22:35:02,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 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) [2022-09-20 22:35:02,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:02,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 22:35:02,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:02,574 INFO L130 PetriNetUnfolder]: 2/120 cut-off events. [2022-09-20 22:35:02,574 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-09-20 22:35:02,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 120 events. 2/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 169. Up to 7 conditions per place. [2022-09-20 22:35:02,575 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 9 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-09-20 22:35:02,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 286 flow [2022-09-20 22:35:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 22:35:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 22:35:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 740 transitions. [2022-09-20 22:35:02,578 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.847651775486827 [2022-09-20 22:35:02,578 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 740 transitions. [2022-09-20 22:35:02,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 740 transitions. [2022-09-20 22:35:02,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:02,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 740 transitions. [2022-09-20 22:35:02,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.22222222222223) internal successors, (740), 9 states have internal predecessors, (740), 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) [2022-09-20 22:35:02,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-09-20 22:35:02,584 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-09-20 22:35:02,584 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 232 flow. Second operand 9 states and 740 transitions. [2022-09-20 22:35:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 286 flow [2022-09-20 22:35:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 280 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-09-20 22:35:02,587 INFO L231 Difference]: Finished difference. Result has 106 places, 94 transitions, 276 flow [2022-09-20 22:35:02,587 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=276, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2022-09-20 22:35:02,588 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2022-09-20 22:35:02,588 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 276 flow [2022-09-20 22:35:02,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 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) [2022-09-20 22:35:02,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:02,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:35:02,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 22:35:02,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:02,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1591229733, now seen corresponding path program 3 times [2022-09-20 22:35:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:02,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445824305] [2022-09-20 22:35:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-09-20 22:35:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445824305] [2022-09-20 22:35:02,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445824305] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:35:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964387336] [2022-09-20 22:35:02,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 22:35:02,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:02,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:35:02,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:35:02,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 22:35:03,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 22:35:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:35:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 22:35:03,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:35:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-09-20 22:35:03,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:35:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-09-20 22:35:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964387336] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:35:03,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:35:03,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-20 22:35:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774612147] [2022-09-20 22:35:03,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:35:03,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 22:35:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 22:35:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-20 22:35:03,215 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 22:35:03,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 276 flow. Second operand has 18 states, 18 states have (on average 81.94444444444444) internal successors, (1475), 18 states have internal predecessors, (1475), 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) [2022-09-20 22:35:03,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:03,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 22:35:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:03,399 INFO L130 PetriNetUnfolder]: 2/164 cut-off events. [2022-09-20 22:35:03,399 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-09-20 22:35:03,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 164 events. 2/164 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 4/167 useless extension candidates. Maximal degree in co-relation 274. Up to 11 conditions per place. [2022-09-20 22:35:03,401 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 13 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2022-09-20 22:35:03,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 440 flow [2022-09-20 22:35:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 22:35:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 22:35:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1718 transitions. [2022-09-20 22:35:03,406 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8433971526755032 [2022-09-20 22:35:03,406 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1718 transitions. [2022-09-20 22:35:03,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1718 transitions. [2022-09-20 22:35:03,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:03,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1718 transitions. [2022-09-20 22:35:03,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.80952380952381) internal successors, (1718), 21 states have internal predecessors, (1718), 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) [2022-09-20 22:35:03,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 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) [2022-09-20 22:35:03,415 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 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) [2022-09-20 22:35:03,415 INFO L175 Difference]: Start difference. First operand has 106 places, 94 transitions, 276 flow. Second operand 21 states and 1718 transitions. [2022-09-20 22:35:03,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 440 flow [2022-09-20 22:35:03,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 426 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-09-20 22:35:03,421 INFO L231 Difference]: Finished difference. Result has 130 places, 107 transitions, 400 flow [2022-09-20 22:35:03,421 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=400, PETRI_PLACES=130, PETRI_TRANSITIONS=107} [2022-09-20 22:35:03,424 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2022-09-20 22:35:03,424 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 107 transitions, 400 flow [2022-09-20 22:35:03,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.94444444444444) internal successors, (1475), 18 states have internal predecessors, (1475), 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) [2022-09-20 22:35:03,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:03,426 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:35:03,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 22:35:03,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:03,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:03,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash 685193445, now seen corresponding path program 4 times [2022-09-20 22:35:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:03,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665160774] [2022-09-20 22:35:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:03,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-09-20 22:35:03,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665160774] [2022-09-20 22:35:03,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665160774] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:35:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363958309] [2022-09-20 22:35:03,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 22:35:03,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:35:03,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:35:03,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 22:35:03,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 22:35:03,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:35:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 22:35:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:35:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-09-20 22:35:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:35:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-09-20 22:35:04,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363958309] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:35:04,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:35:04,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-20 22:35:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776982045] [2022-09-20 22:35:04,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:35:04,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 22:35:04,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 22:35:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-20 22:35:04,057 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 22:35:04,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 107 transitions, 400 flow. Second operand has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 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) [2022-09-20 22:35:04,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:04,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 22:35:04,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:35:04,239 INFO L130 PetriNetUnfolder]: 2/196 cut-off events. [2022-09-20 22:35:04,239 INFO L131 PetriNetUnfolder]: For 63/93 co-relation queries the response was YES. [2022-09-20 22:35:04,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 196 events. 2/196 cut-off events. For 63/93 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 135 event pairs, 0 based on Foata normal form. 23/218 useless extension candidates. Maximal degree in co-relation 361. Up to 11 conditions per place. [2022-09-20 22:35:04,243 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 14 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2022-09-20 22:35:04,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 125 transitions, 558 flow [2022-09-20 22:35:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 22:35:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 22:35:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1698 transitions. [2022-09-20 22:35:04,248 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.833578792341679 [2022-09-20 22:35:04,248 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1698 transitions. [2022-09-20 22:35:04,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1698 transitions. [2022-09-20 22:35:04,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:35:04,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1698 transitions. [2022-09-20 22:35:04,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.85714285714286) internal successors, (1698), 21 states have internal predecessors, (1698), 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) [2022-09-20 22:35:04,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 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) [2022-09-20 22:35:04,257 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 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) [2022-09-20 22:35:04,257 INFO L175 Difference]: Start difference. First operand has 130 places, 107 transitions, 400 flow. Second operand 21 states and 1698 transitions. [2022-09-20 22:35:04,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 125 transitions, 558 flow [2022-09-20 22:35:04,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 125 transitions, 534 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-09-20 22:35:04,269 INFO L231 Difference]: Finished difference. Result has 149 places, 120 transitions, 506 flow [2022-09-20 22:35:04,269 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=506, PETRI_PLACES=149, PETRI_TRANSITIONS=120} [2022-09-20 22:35:04,269 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 65 predicate places. [2022-09-20 22:35:04,270 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 120 transitions, 506 flow [2022-09-20 22:35:04,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 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) [2022-09-20 22:35:04,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:35:04,271 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:35:04,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 22:35:04,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:04,483 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:35:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:35:04,484 INFO L85 PathProgramCache]: Analyzing trace with hash -398868751, now seen corresponding path program 5 times [2022-09-20 22:35:04,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:35:04,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051723721] [2022-09-20 22:35:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:35:04,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:35:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:35:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-09-20 22:35:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:35:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051723721] [2022-09-20 22:35:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051723721] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:35:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820164250] [2022-09-20 22:35:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 22:35:04,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:35:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:35:04,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:35:04,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 22:35:04,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-09-20 22:35:04,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:35:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-20 22:35:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:35:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-09-20 22:35:05,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:35:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-09-20 22:35:05,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820164250] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:35:05,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:35:05,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-09-20 22:35:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463908314] [2022-09-20 22:35:05,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:35:05,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-09-20 22:35:05,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:35:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-09-20 22:35:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2022-09-20 22:35:05,518 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-09-20 22:35:05,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 120 transitions, 506 flow. Second operand has 47 states, 47 states have (on average 74.27659574468085) internal successors, (3491), 47 states have internal predecessors, (3491), 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) [2022-09-20 22:35:05,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:35:05,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-09-20 22:35:05,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:36:01,187 INFO L130 PetriNetUnfolder]: 2395/7667 cut-off events. [2022-09-20 22:36:01,187 INFO L131 PetriNetUnfolder]: For 22843/22843 co-relation queries the response was YES. [2022-09-20 22:36:01,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24827 conditions, 7667 events. 2395/7667 cut-off events. For 22843/22843 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 57256 event pairs, 18 based on Foata normal form. 367/8028 useless extension candidates. Maximal degree in co-relation 24806. Up to 1026 conditions per place. [2022-09-20 22:36:01,265 INFO L137 encePairwiseOnDemand]: 86/97 looper letters, 1078 selfloop transitions, 2047 changer transitions 0/3188 dead transitions. [2022-09-20 22:36:01,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1161 places, 3188 transitions, 28606 flow [2022-09-20 22:36:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2022-09-20 22:36:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2022-09-20 22:36:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 76289 transitions. [2022-09-20 22:36:01,371 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7763914472679904 [2022-09-20 22:36:01,372 INFO L72 ComplementDD]: Start complementDD. Operand 1013 states and 76289 transitions. [2022-09-20 22:36:01,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1013 states and 76289 transitions. [2022-09-20 22:36:01,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:36:01,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1013 states and 76289 transitions. [2022-09-20 22:36:01,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 1014 states, 1013 states have (on average 75.30997038499507) internal successors, (76289), 1013 states have internal predecessors, (76289), 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) [2022-09-20 22:36:01,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 1014 states, 1014 states have (on average 97.0) internal successors, (98358), 1014 states have internal predecessors, (98358), 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) [2022-09-20 22:36:01,757 INFO L81 ComplementDD]: Finished complementDD. Result has 1014 states, 1014 states have (on average 97.0) internal successors, (98358), 1014 states have internal predecessors, (98358), 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) [2022-09-20 22:36:01,758 INFO L175 Difference]: Start difference. First operand has 149 places, 120 transitions, 506 flow. Second operand 1013 states and 76289 transitions. [2022-09-20 22:36:01,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1161 places, 3188 transitions, 28606 flow [2022-09-20 22:36:01,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1155 places, 3188 transitions, 27686 flow, removed 322 selfloop flow, removed 6 redundant places. [2022-09-20 22:36:01,858 INFO L231 Difference]: Finished difference. Result has 1467 places, 2215 transitions, 20238 flow [2022-09-20 22:36:01,859 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1013, PETRI_FLOW=20238, PETRI_PLACES=1467, PETRI_TRANSITIONS=2215} [2022-09-20 22:36:01,861 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 1383 predicate places. [2022-09-20 22:36:01,863 INFO L495 AbstractCegarLoop]: Abstraction has has 1467 places, 2215 transitions, 20238 flow [2022-09-20 22:36:01,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.27659574468085) internal successors, (3491), 47 states have internal predecessors, (3491), 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) [2022-09-20 22:36:01,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:36:01,865 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:36:01,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 22:36:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:02,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:36:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:36:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash -834534029, now seen corresponding path program 6 times [2022-09-20 22:36:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:36:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706099303] [2022-09-20 22:36:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:36:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:36:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:36:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-09-20 22:36:02,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:36:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706099303] [2022-09-20 22:36:02,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706099303] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:36:02,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663424581] [2022-09-20 22:36:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 22:36:02,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:36:02,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:36:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 22:36:02,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-09-20 22:36:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:36:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 32 conjunts are in the unsatisfiable core [2022-09-20 22:36:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:36:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-09-20 22:36:03,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:36:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-09-20 22:36:03,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663424581] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:36:03,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:36:03,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-09-20 22:36:03,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826092819] [2022-09-20 22:36:03,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:36:03,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-09-20 22:36:03,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:36:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-09-20 22:36:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-09-20 22:36:03,743 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 22:36:03,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1467 places, 2215 transitions, 20238 flow. Second operand has 43 states, 43 states have (on average 81.04651162790698) internal successors, (3485), 43 states have internal predecessors, (3485), 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) [2022-09-20 22:36:03,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:36:03,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 22:36:03,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:36:09,373 INFO L130 PetriNetUnfolder]: 1660/7068 cut-off events. [2022-09-20 22:36:09,373 INFO L131 PetriNetUnfolder]: For 1223819/1224779 co-relation queries the response was YES. [2022-09-20 22:36:09,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32853 conditions, 7068 events. 1660/7068 cut-off events. For 1223819/1224779 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 54539 event pairs, 48 based on Foata normal form. 104/7098 useless extension candidates. Maximal degree in co-relation 32520. Up to 819 conditions per place. [2022-09-20 22:36:09,581 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 181 selfloop transitions, 1380 changer transitions 0/2687 dead transitions. [2022-09-20 22:36:09,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1526 places, 2687 transitions, 28614 flow [2022-09-20 22:36:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-09-20 22:36:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-09-20 22:36:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4832 transitions. [2022-09-20 22:36:09,587 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8302405498281787 [2022-09-20 22:36:09,587 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4832 transitions. [2022-09-20 22:36:09,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4832 transitions. [2022-09-20 22:36:09,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:36:09,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4832 transitions. [2022-09-20 22:36:09,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 80.53333333333333) internal successors, (4832), 60 states have internal predecessors, (4832), 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) [2022-09-20 22:36:09,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 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) [2022-09-20 22:36:09,600 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 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) [2022-09-20 22:36:09,600 INFO L175 Difference]: Start difference. First operand has 1467 places, 2215 transitions, 20238 flow. Second operand 60 states and 4832 transitions. [2022-09-20 22:36:09,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1526 places, 2687 transitions, 28614 flow [2022-09-20 22:36:12,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1490 places, 2687 transitions, 25336 flow, removed 433 selfloop flow, removed 36 redundant places. [2022-09-20 22:36:12,485 INFO L231 Difference]: Finished difference. Result has 1496 places, 2583 transitions, 23732 flow [2022-09-20 22:36:12,487 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=17190, PETRI_DIFFERENCE_MINUEND_PLACES=1431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=23732, PETRI_PLACES=1496, PETRI_TRANSITIONS=2583} [2022-09-20 22:36:12,488 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 1412 predicate places. [2022-09-20 22:36:12,488 INFO L495 AbstractCegarLoop]: Abstraction has has 1496 places, 2583 transitions, 23732 flow [2022-09-20 22:36:12,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 81.04651162790698) internal successors, (3485), 43 states have internal predecessors, (3485), 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) [2022-09-20 22:36:12,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:36:12,489 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:36:12,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-20 22:36:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:12,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:36:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:36:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1733423978, now seen corresponding path program 7 times [2022-09-20 22:36:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:36:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711821086] [2022-09-20 22:36:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:36:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:36:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:36:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 624 proven. 316 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-09-20 22:36:12,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:36:12,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711821086] [2022-09-20 22:36:12,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711821086] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:36:12,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510176647] [2022-09-20 22:36:12,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 22:36:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:36:12,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:36:12,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 22:36:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:36:13,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 18 conjunts are in the unsatisfiable core [2022-09-20 22:36:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:36:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 624 proven. 316 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-09-20 22:36:13,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:36:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 624 proven. 316 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-09-20 22:36:13,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510176647] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:36:13,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:36:13,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2022-09-20 22:36:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745340137] [2022-09-20 22:36:13,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:36:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-09-20 22:36:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:36:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-09-20 22:36:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2022-09-20 22:36:13,723 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 22:36:13,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1496 places, 2583 transitions, 23732 flow. Second operand has 38 states, 38 states have (on average 81.97368421052632) internal successors, (3115), 38 states have internal predecessors, (3115), 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) [2022-09-20 22:36:13,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:36:13,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 22:36:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:36:21,405 INFO L130 PetriNetUnfolder]: 2433/10296 cut-off events. [2022-09-20 22:36:21,405 INFO L131 PetriNetUnfolder]: For 2852955/2856882 co-relation queries the response was YES. [2022-09-20 22:36:21,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61982 conditions, 10296 events. 2433/10296 cut-off events. For 2852955/2856882 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 89707 event pairs, 318 based on Foata normal form. 817/10893 useless extension candidates. Maximal degree in co-relation 61643. Up to 1256 conditions per place. [2022-09-20 22:36:21,772 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 23 selfloop transitions, 1427 changer transitions 0/2968 dead transitions. [2022-09-20 22:36:21,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1546 places, 2968 transitions, 32662 flow [2022-09-20 22:36:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-09-20 22:36:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-09-20 22:36:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4163 transitions. [2022-09-20 22:36:21,775 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8415201131999192 [2022-09-20 22:36:21,775 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4163 transitions. [2022-09-20 22:36:21,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4163 transitions. [2022-09-20 22:36:21,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:36:21,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4163 transitions. [2022-09-20 22:36:21,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 81.62745098039215) internal successors, (4163), 51 states have internal predecessors, (4163), 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) [2022-09-20 22:36:21,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 97.0) internal successors, (5044), 52 states have internal predecessors, (5044), 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) [2022-09-20 22:36:21,785 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 97.0) internal successors, (5044), 52 states have internal predecessors, (5044), 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) [2022-09-20 22:36:21,785 INFO L175 Difference]: Start difference. First operand has 1496 places, 2583 transitions, 23732 flow. Second operand 51 states and 4163 transitions. [2022-09-20 22:36:21,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1546 places, 2968 transitions, 32662 flow [2022-09-20 22:36:29,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1504 places, 2968 transitions, 30730 flow, removed 0 selfloop flow, removed 42 redundant places. [2022-09-20 22:36:29,795 INFO L231 Difference]: Finished difference. Result has 1514 places, 2954 transitions, 30737 flow [2022-09-20 22:36:29,797 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=21800, PETRI_DIFFERENCE_MINUEND_PLACES=1454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=30737, PETRI_PLACES=1514, PETRI_TRANSITIONS=2954} [2022-09-20 22:36:29,798 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 1430 predicate places. [2022-09-20 22:36:29,798 INFO L495 AbstractCegarLoop]: Abstraction has has 1514 places, 2954 transitions, 30737 flow [2022-09-20 22:36:29,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 81.97368421052632) internal successors, (3115), 38 states have internal predecessors, (3115), 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) [2022-09-20 22:36:29,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:36:29,799 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:36:29,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 22:36:30,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:30,014 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:36:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:36:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash -804652350, now seen corresponding path program 8 times [2022-09-20 22:36:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:36:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638575848] [2022-09-20 22:36:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:36:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:36:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:36:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 624 proven. 1513 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-09-20 22:36:30,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:36:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638575848] [2022-09-20 22:36:30,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638575848] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:36:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208143341] [2022-09-20 22:36:30,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 22:36:30,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:36:30,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:36:30,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 22:36:30,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 22:36:30,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:36:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 36 conjunts are in the unsatisfiable core [2022-09-20 22:36:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:36:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 624 proven. 1513 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-09-20 22:36:31,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:36:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 624 proven. 1513 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-09-20 22:36:31,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208143341] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:36:31,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:36:31,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 43 [2022-09-20 22:36:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96821224] [2022-09-20 22:36:31,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:36:31,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-09-20 22:36:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:36:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-09-20 22:36:31,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-09-20 22:36:31,743 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 22:36:31,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1514 places, 2954 transitions, 30737 flow. Second operand has 43 states, 43 states have (on average 82.02325581395348) internal successors, (3527), 43 states have internal predecessors, (3527), 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) [2022-09-20 22:36:31,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:36:31,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 22:36:31,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:36:41,536 INFO L130 PetriNetUnfolder]: 2726/12055 cut-off events. [2022-09-20 22:36:41,536 INFO L131 PetriNetUnfolder]: For 4050149/4054346 co-relation queries the response was YES. [2022-09-20 22:36:41,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85030 conditions, 12055 events. 2726/12055 cut-off events. For 4050149/4054346 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 107757 event pairs, 387 based on Foata normal form. 812/12599 useless extension candidates. Maximal degree in co-relation 84681. Up to 1448 conditions per place. [2022-09-20 22:36:41,972 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 26 selfloop transitions, 1565 changer transitions 0/3109 dead transitions. [2022-09-20 22:36:41,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1573 places, 3109 transitions, 36783 flow [2022-09-20 22:36:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-09-20 22:36:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-09-20 22:36:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4889 transitions. [2022-09-20 22:36:41,976 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8400343642611684 [2022-09-20 22:36:41,976 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4889 transitions. [2022-09-20 22:36:41,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4889 transitions. [2022-09-20 22:36:41,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:36:41,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4889 transitions. [2022-09-20 22:36:41,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 81.48333333333333) internal successors, (4889), 60 states have internal predecessors, (4889), 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) [2022-09-20 22:36:41,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 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) [2022-09-20 22:36:41,986 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 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) [2022-09-20 22:36:41,986 INFO L175 Difference]: Start difference. First operand has 1514 places, 2954 transitions, 30737 flow. Second operand 60 states and 4889 transitions. [2022-09-20 22:36:41,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1573 places, 3109 transitions, 36783 flow [2022-09-20 22:36:54,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1482 places, 3109 transitions, 32809 flow, removed 923 selfloop flow, removed 91 redundant places. [2022-09-20 22:36:54,966 INFO L231 Difference]: Finished difference. Result has 1486 places, 3093 transitions, 32740 flow [2022-09-20 22:36:54,969 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=27189, PETRI_DIFFERENCE_MINUEND_PLACES=1423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=32740, PETRI_PLACES=1486, PETRI_TRANSITIONS=3093} [2022-09-20 22:36:54,970 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 1402 predicate places. [2022-09-20 22:36:54,970 INFO L495 AbstractCegarLoop]: Abstraction has has 1486 places, 3093 transitions, 32740 flow [2022-09-20 22:36:54,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 82.02325581395348) internal successors, (3527), 43 states have internal predecessors, (3527), 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) [2022-09-20 22:36:54,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:36:54,971 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:36:54,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 22:36:55,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-09-20 22:36:55,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 22:36:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:36:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -137124060, now seen corresponding path program 9 times [2022-09-20 22:36:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:36:55,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625442661] [2022-09-20 22:36:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:36:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:36:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:36:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:36:57,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:36:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625442661] [2022-09-20 22:36:57,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625442661] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:36:57,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940108382] [2022-09-20 22:36:57,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 22:36:57,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:36:57,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:36:57,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:36:57,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 22:36:57,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-09-20 22:36:57,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:36:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 165 conjunts are in the unsatisfiable core [2022-09-20 22:36:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:36:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:36:59,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:37:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:37:00,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940108382] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:37:00,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:37:00,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2022-09-20 22:37:00,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257807311] [2022-09-20 22:37:00,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:37:00,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-09-20 22:37:00,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:37:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-09-20 22:37:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2022-09-20 22:37:00,322 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 97 [2022-09-20 22:37:00,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1486 places, 3093 transitions, 32740 flow. Second operand has 70 states, 70 states have (on average 76.32857142857142) internal successors, (5343), 70 states have internal predecessors, (5343), 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) [2022-09-20 22:37:00,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:37:00,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 97 [2022-09-20 22:37:00,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand