/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/weaver/chl-name-comparator-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 18:56:31,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 18:56:31,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 18:56:31,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 18:56:31,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 18:56:31,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 18:56:31,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 18:56:31,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 18:56:31,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 18:56:31,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 18:56:31,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 18:56:31,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 18:56:31,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 18:56:31,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 18:56:31,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 18:56:31,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 18:56:31,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 18:56:31,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 18:56:31,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 18:56:31,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 18:56:31,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 18:56:31,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 18:56:31,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 18:56:31,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 18:56:31,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 18:56:31,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 18:56:31,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 18:56:31,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 18:56:31,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 18:56:31,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 18:56:31,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 18:56:31,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 18:56:31,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 18:56:31,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 18:56:31,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 18:56:31,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 18:56:31,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 18:56:31,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 18:56:31,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 18:56:31,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 18:56:31,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 18:56:31,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-05 18:56:31,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 18:56:31,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 18:56:31,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 18:56:31,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 18:56:31,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 18:56:31,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 18:56:31,448 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 18:56:31,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 18:56:31,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 18:56:31,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 18:56:31,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 18:56:31,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 18:56:31,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 18:56:31,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 18:56:31,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 18:56:31,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 18:56:31,451 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-05 18:56:31,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 18:56:31,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 18:56:31,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 18:56:31,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 18:56:31,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 18:56:31,709 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 18:56:31,711 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 18:56:31,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-subst.wvr.c [2022-12-05 18:56:32,608 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 18:56:32,827 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 18:56:32,828 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-subst.wvr.c [2022-12-05 18:56:32,834 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fffdfa94/f57d3f19e8404e47912aa5ee2f73b889/FLAGa1236a29e [2022-12-05 18:56:32,852 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fffdfa94/f57d3f19e8404e47912aa5ee2f73b889 [2022-12-05 18:56:32,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 18:56:32,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 18:56:32,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 18:56:32,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 18:56:32,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 18:56:32,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 06:56:32" (1/1) ... [2022-12-05 18:56:32,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269fc0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:32, skipping insertion in model container [2022-12-05 18:56:32,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 06:56:32" (1/1) ... [2022-12-05 18:56:32,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 18:56:32,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 18:56:33,042 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2022-12-05 18:56:33,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 18:56:33,056 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 18:56:33,092 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2022-12-05 18:56:33,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 18:56:33,107 INFO L208 MainTranslator]: Completed translation [2022-12-05 18:56:33,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33 WrapperNode [2022-12-05 18:56:33,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 18:56:33,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 18:56:33,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 18:56:33,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 18:56:33,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,157 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 297 [2022-12-05 18:56:33,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 18:56:33,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 18:56:33,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 18:56:33,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 18:56:33,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 18:56:33,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 18:56:33,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 18:56:33,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 18:56:33,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (1/1) ... [2022-12-05 18:56:33,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 18:56:33,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 18:56:33,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 18:56:33,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 18:56:33,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 18:56:33,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 18:56:33,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 18:56:33,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 18:56:33,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 18:56:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 18:56:33,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 18:56:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 18:56:33,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 18:56:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 18:56:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 18:56:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 18:56:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 18:56:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 18:56:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 18:56:33,247 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 18:56:33,341 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 18:56:33,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 18:56:33,654 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 18:56:33,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 18:56:33,662 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-05 18:56:33,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 06:56:33 BoogieIcfgContainer [2022-12-05 18:56:33,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 18:56:33,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 18:56:33,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 18:56:33,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 18:56:33,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 06:56:32" (1/3) ... [2022-12-05 18:56:33,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6120f667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 06:56:33, skipping insertion in model container [2022-12-05 18:56:33,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 06:56:33" (2/3) ... [2022-12-05 18:56:33,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6120f667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 06:56:33, skipping insertion in model container [2022-12-05 18:56:33,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 06:56:33" (3/3) ... [2022-12-05 18:56:33,669 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2022-12-05 18:56:33,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 18:56:33,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 18:56:33,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 18:56:33,768 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 18:56:33,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 341 transitions, 706 flow [2022-12-05 18:56:33,950 INFO L130 PetriNetUnfolder]: 26/338 cut-off events. [2022-12-05 18:56:33,951 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 18:56:33,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 26/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 791 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-12-05 18:56:33,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 341 transitions, 706 flow [2022-12-05 18:56:33,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 328 transitions, 674 flow [2022-12-05 18:56:33,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 18:56:33,992 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;@3efcde69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 18:56:33,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 18:56:34,030 INFO L130 PetriNetUnfolder]: 26/327 cut-off events. [2022-12-05 18:56:34,030 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 18:56:34,030 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:34,031 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:34,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:34,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1950208797, now seen corresponding path program 1 times [2022-12-05 18:56:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:34,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786376788] [2022-12-05 18:56:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:34,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 18:56:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786376788] [2022-12-05 18:56:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786376788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:56:34,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:56:34,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 18:56:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096989387] [2022-12-05 18:56:34,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:56:34,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-05 18:56:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-05 18:56:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-05 18:56:34,306 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 341 [2022-12-05 18:56:34,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 328 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 319.5) internal successors, (639), 2 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:34,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:34,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 341 [2022-12-05 18:56:34,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:56:34,378 INFO L130 PetriNetUnfolder]: 7/309 cut-off events. [2022-12-05 18:56:34,378 INFO L131 PetriNetUnfolder]: For 12/14 co-relation queries the response was YES. [2022-12-05 18:56:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 309 events. 7/309 cut-off events. For 12/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 753 event pairs, 0 based on Foata normal form. 38/325 useless extension candidates. Maximal degree in co-relation 239. Up to 7 conditions per place. [2022-12-05 18:56:34,384 INFO L137 encePairwiseOnDemand]: 322/341 looper letters, 6 selfloop transitions, 0 changer transitions 3/309 dead transitions. [2022-12-05 18:56:34,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 309 transitions, 648 flow [2022-12-05 18:56:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-05 18:56:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-05 18:56:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 655 transitions. [2022-12-05 18:56:34,398 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.9604105571847508 [2022-12-05 18:56:34,399 INFO L175 Difference]: Start difference. First operand has 312 places, 328 transitions, 674 flow. Second operand 2 states and 655 transitions. [2022-12-05 18:56:34,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 309 transitions, 648 flow [2022-12-05 18:56:34,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 309 transitions, 636 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 18:56:34,409 INFO L231 Difference]: Finished difference. Result has 307 places, 306 transitions, 618 flow [2022-12-05 18:56:34,411 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=618, PETRI_PLACES=307, PETRI_TRANSITIONS=306} [2022-12-05 18:56:34,414 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, -5 predicate places. [2022-12-05 18:56:34,414 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 306 transitions, 618 flow [2022-12-05 18:56:34,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 319.5) internal successors, (639), 2 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:34,415 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:34,415 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:34,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 18:56:34,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 648841092, now seen corresponding path program 1 times [2022-12-05 18:56:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594397559] [2022-12-05 18:56:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 18:56:34,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:34,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594397559] [2022-12-05 18:56:34,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594397559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:56:34,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:56:34,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 18:56:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681768383] [2022-12-05 18:56:34,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:56:34,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 18:56:34,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 18:56:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 18:56:34,699 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-12-05 18:56:34,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 306 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:34,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:34,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-12-05 18:56:34,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:56:34,818 INFO L130 PetriNetUnfolder]: 7/312 cut-off events. [2022-12-05 18:56:34,818 INFO L131 PetriNetUnfolder]: For 3/5 co-relation queries the response was YES. [2022-12-05 18:56:34,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 312 events. 7/312 cut-off events. For 3/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 750 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 337. Up to 16 conditions per place. [2022-12-05 18:56:34,820 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 18 selfloop transitions, 4 changer transitions 0/310 dead transitions. [2022-12-05 18:56:34,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 310 transitions, 670 flow [2022-12-05 18:56:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 18:56:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 18:56:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1538 transitions. [2022-12-05 18:56:34,830 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.9020527859237537 [2022-12-05 18:56:34,830 INFO L175 Difference]: Start difference. First operand has 307 places, 306 transitions, 618 flow. Second operand 5 states and 1538 transitions. [2022-12-05 18:56:34,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 310 transitions, 670 flow [2022-12-05 18:56:34,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 310 transitions, 670 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 18:56:34,837 INFO L231 Difference]: Finished difference. Result has 309 places, 307 transitions, 634 flow [2022-12-05 18:56:34,837 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=634, PETRI_PLACES=309, PETRI_TRANSITIONS=307} [2022-12-05 18:56:34,838 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, -3 predicate places. [2022-12-05 18:56:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 307 transitions, 634 flow [2022-12-05 18:56:34,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:34,839 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:34,839 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 18:56:34,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1579899444, now seen corresponding path program 1 times [2022-12-05 18:56:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:34,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135050662] [2022-12-05 18:56:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 18:56:35,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135050662] [2022-12-05 18:56:35,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135050662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 18:56:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845552050] [2022-12-05 18:56:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:35,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 18:56:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 18:56:35,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 18:56:35,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 18:56:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:35,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 18:56:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 18:56:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 18:56:35,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 18:56:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 18:56:35,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845552050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 18:56:35,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 18:56:35,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-05 18:56:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32558913] [2022-12-05 18:56:35,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 18:56:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:56:35,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:56:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:56:35,476 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 341 [2022-12-05 18:56:35,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 307 transitions, 634 flow. Second operand has 14 states, 14 states have (on average 304.7857142857143) internal successors, (4267), 14 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:35,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:35,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 341 [2022-12-05 18:56:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:56:35,611 INFO L130 PetriNetUnfolder]: 7/321 cut-off events. [2022-12-05 18:56:35,611 INFO L131 PetriNetUnfolder]: For 7/9 co-relation queries the response was YES. [2022-12-05 18:56:35,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 321 events. 7/321 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 739 event pairs, 0 based on Foata normal form. 2/305 useless extension candidates. Maximal degree in co-relation 362. Up to 13 conditions per place. [2022-12-05 18:56:35,614 INFO L137 encePairwiseOnDemand]: 333/341 looper letters, 19 selfloop transitions, 11 changer transitions 0/317 dead transitions. [2022-12-05 18:56:35,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 317 transitions, 716 flow [2022-12-05 18:56:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 18:56:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 18:56:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3354 transitions. [2022-12-05 18:56:35,619 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8941615569181551 [2022-12-05 18:56:35,619 INFO L175 Difference]: Start difference. First operand has 309 places, 307 transitions, 634 flow. Second operand 11 states and 3354 transitions. [2022-12-05 18:56:35,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 317 transitions, 716 flow [2022-12-05 18:56:35,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 317 transitions, 710 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 18:56:35,623 INFO L231 Difference]: Finished difference. Result has 319 places, 313 transitions, 683 flow [2022-12-05 18:56:35,624 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=683, PETRI_PLACES=319, PETRI_TRANSITIONS=313} [2022-12-05 18:56:35,625 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 7 predicate places. [2022-12-05 18:56:35,625 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 313 transitions, 683 flow [2022-12-05 18:56:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 304.7857142857143) internal successors, (4267), 14 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:35,627 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:35,627 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:35,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 18:56:35,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 18:56:35,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1417013068, now seen corresponding path program 2 times [2022-12-05 18:56:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:35,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507746275] [2022-12-05 18:56:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:35,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:56:36,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507746275] [2022-12-05 18:56:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507746275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:56:36,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:56:36,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:56:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20016318] [2022-12-05 18:56:36,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:56:36,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:56:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:56:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:56:36,478 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:56:36,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 313 transitions, 683 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:36,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:36,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:56:36,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:56:40,057 INFO L130 PetriNetUnfolder]: 9436/28906 cut-off events. [2022-12-05 18:56:40,057 INFO L131 PetriNetUnfolder]: For 592/627 co-relation queries the response was YES. [2022-12-05 18:56:40,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 28906 events. 9436/28906 cut-off events. For 592/627 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 364994 event pairs, 3322 based on Foata normal form. 4/26074 useless extension candidates. Maximal degree in co-relation 43417. Up to 4897 conditions per place. [2022-12-05 18:56:40,232 INFO L137 encePairwiseOnDemand]: 314/341 looper letters, 308 selfloop transitions, 46 changer transitions 10/606 dead transitions. [2022-12-05 18:56:40,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 606 transitions, 2028 flow [2022-12-05 18:56:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 18:56:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 18:56:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5799 transitions. [2022-12-05 18:56:40,242 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7729938683017862 [2022-12-05 18:56:40,243 INFO L175 Difference]: Start difference. First operand has 319 places, 313 transitions, 683 flow. Second operand 22 states and 5799 transitions. [2022-12-05 18:56:40,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 606 transitions, 2028 flow [2022-12-05 18:56:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 606 transitions, 2019 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-05 18:56:40,254 INFO L231 Difference]: Finished difference. Result has 353 places, 350 transitions, 973 flow [2022-12-05 18:56:40,255 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=973, PETRI_PLACES=353, PETRI_TRANSITIONS=350} [2022-12-05 18:56:40,256 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 41 predicate places. [2022-12-05 18:56:40,256 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 350 transitions, 973 flow [2022-12-05 18:56:40,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:40,258 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:40,258 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:40,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 18:56:40,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1951347622, now seen corresponding path program 3 times [2022-12-05 18:56:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:40,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187704116] [2022-12-05 18:56:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:56:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187704116] [2022-12-05 18:56:40,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187704116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:56:40,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:56:40,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:56:40,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143027711] [2022-12-05 18:56:40,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:56:40,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:56:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:56:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:56:40,856 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:56:40,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 350 transitions, 973 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:40,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:40,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:56:40,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:56:46,958 INFO L130 PetriNetUnfolder]: 14307/44506 cut-off events. [2022-12-05 18:56:46,958 INFO L131 PetriNetUnfolder]: For 19061/19156 co-relation queries the response was YES. [2022-12-05 18:56:47,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82999 conditions, 44506 events. 14307/44506 cut-off events. For 19061/19156 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 600309 event pairs, 4069 based on Foata normal form. 9/40858 useless extension candidates. Maximal degree in co-relation 82975. Up to 7069 conditions per place. [2022-12-05 18:56:47,245 INFO L137 encePairwiseOnDemand]: 314/341 looper letters, 418 selfloop transitions, 106 changer transitions 10/776 dead transitions. [2022-12-05 18:56:47,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 776 transitions, 3511 flow [2022-12-05 18:56:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 18:56:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 18:56:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7397 transitions. [2022-12-05 18:56:47,256 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7747172182656054 [2022-12-05 18:56:47,256 INFO L175 Difference]: Start difference. First operand has 353 places, 350 transitions, 973 flow. Second operand 28 states and 7397 transitions. [2022-12-05 18:56:47,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 776 transitions, 3511 flow [2022-12-05 18:56:47,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 776 transitions, 3487 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-12-05 18:56:47,468 INFO L231 Difference]: Finished difference. Result has 392 places, 446 transitions, 2026 flow [2022-12-05 18:56:47,469 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2026, PETRI_PLACES=392, PETRI_TRANSITIONS=446} [2022-12-05 18:56:47,470 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 80 predicate places. [2022-12-05 18:56:47,470 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 446 transitions, 2026 flow [2022-12-05 18:56:47,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:47,472 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:47,472 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:47,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 18:56:47,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:47,473 INFO L85 PathProgramCache]: Analyzing trace with hash -970579354, now seen corresponding path program 4 times [2022-12-05 18:56:47,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:47,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938701976] [2022-12-05 18:56:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:47,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:56:48,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938701976] [2022-12-05 18:56:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938701976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:56:48,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:56:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:56:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628100090] [2022-12-05 18:56:48,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:56:48,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:56:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:56:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:56:48,051 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:56:48,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 446 transitions, 2026 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:48,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:48,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:56:48,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:56:55,284 INFO L130 PetriNetUnfolder]: 15717/50800 cut-off events. [2022-12-05 18:56:55,284 INFO L131 PetriNetUnfolder]: For 86722/87315 co-relation queries the response was YES. [2022-12-05 18:56:55,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115585 conditions, 50800 events. 15717/50800 cut-off events. For 86722/87315 co-relation queries the response was YES. Maximal size of possible extension queue 2006. Compared 709926 event pairs, 4434 based on Foata normal form. 172/46855 useless extension candidates. Maximal degree in co-relation 115543. Up to 7285 conditions per place. [2022-12-05 18:56:55,894 INFO L137 encePairwiseOnDemand]: 315/341 looper letters, 377 selfloop transitions, 110 changer transitions 6/735 dead transitions. [2022-12-05 18:56:55,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 735 transitions, 4493 flow [2022-12-05 18:56:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 18:56:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 18:56:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4559 transitions. [2022-12-05 18:56:55,903 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7864412627220977 [2022-12-05 18:56:55,903 INFO L175 Difference]: Start difference. First operand has 392 places, 446 transitions, 2026 flow. Second operand 17 states and 4559 transitions. [2022-12-05 18:56:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 735 transitions, 4493 flow [2022-12-05 18:56:56,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 735 transitions, 4307 flow, removed 91 selfloop flow, removed 4 redundant places. [2022-12-05 18:56:56,606 INFO L231 Difference]: Finished difference. Result has 413 places, 493 transitions, 2761 flow [2022-12-05 18:56:56,606 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2761, PETRI_PLACES=413, PETRI_TRANSITIONS=493} [2022-12-05 18:56:56,607 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 101 predicate places. [2022-12-05 18:56:56,607 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 493 transitions, 2761 flow [2022-12-05 18:56:56,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:56,608 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:56:56,608 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:56:56,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 18:56:56,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:56:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:56:56,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1252073612, now seen corresponding path program 5 times [2022-12-05 18:56:56,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:56:56,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087438050] [2022-12-05 18:56:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:56:56,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:56:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:56:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:56:57,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:56:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087438050] [2022-12-05 18:56:57,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087438050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:56:57,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:56:57,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:56:57,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779231288] [2022-12-05 18:56:57,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:56:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:56:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:56:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:56:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:56:57,177 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:56:57,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 493 transitions, 2761 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:56:57,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:56:57,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:56:57,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:57:05,996 INFO L130 PetriNetUnfolder]: 18769/57273 cut-off events. [2022-12-05 18:57:05,997 INFO L131 PetriNetUnfolder]: For 165678/166897 co-relation queries the response was YES. [2022-12-05 18:57:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148169 conditions, 57273 events. 18769/57273 cut-off events. For 165678/166897 co-relation queries the response was YES. Maximal size of possible extension queue 2243. Compared 795732 event pairs, 8113 based on Foata normal form. 77/52824 useless extension candidates. Maximal degree in co-relation 148117. Up to 14740 conditions per place. [2022-12-05 18:57:06,829 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 379 selfloop transitions, 94 changer transitions 6/721 dead transitions. [2022-12-05 18:57:06,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 721 transitions, 5106 flow [2022-12-05 18:57:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-05 18:57:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-05 18:57:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3988 transitions. [2022-12-05 18:57:06,838 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7796676441837732 [2022-12-05 18:57:06,838 INFO L175 Difference]: Start difference. First operand has 413 places, 493 transitions, 2761 flow. Second operand 15 states and 3988 transitions. [2022-12-05 18:57:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 721 transitions, 5106 flow [2022-12-05 18:57:08,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 721 transitions, 4898 flow, removed 66 selfloop flow, removed 6 redundant places. [2022-12-05 18:57:08,120 INFO L231 Difference]: Finished difference. Result has 432 places, 536 transitions, 3488 flow [2022-12-05 18:57:08,120 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3488, PETRI_PLACES=432, PETRI_TRANSITIONS=536} [2022-12-05 18:57:08,121 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 120 predicate places. [2022-12-05 18:57:08,121 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 536 transitions, 3488 flow [2022-12-05 18:57:08,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:57:08,122 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:57:08,122 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:57:08,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 18:57:08,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:57:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:57:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 500872680, now seen corresponding path program 6 times [2022-12-05 18:57:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:57:08,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477102028] [2022-12-05 18:57:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:57:08,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:57:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:57:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:57:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:57:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477102028] [2022-12-05 18:57:08,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477102028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:57:08,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:57:08,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:57:08,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67028498] [2022-12-05 18:57:08,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:57:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:57:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:57:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:57:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:57:08,514 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:57:08,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 536 transitions, 3488 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:57:08,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:57:08,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:57:08,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:57:23,200 INFO L130 PetriNetUnfolder]: 25179/83979 cut-off events. [2022-12-05 18:57:23,201 INFO L131 PetriNetUnfolder]: For 319813/321339 co-relation queries the response was YES. [2022-12-05 18:57:24,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220047 conditions, 83979 events. 25179/83979 cut-off events. For 319813/321339 co-relation queries the response was YES. Maximal size of possible extension queue 2883. Compared 1252714 event pairs, 7591 based on Foata normal form. 272/77221 useless extension candidates. Maximal degree in co-relation 219983. Up to 11681 conditions per place. [2022-12-05 18:57:24,469 INFO L137 encePairwiseOnDemand]: 316/341 looper letters, 431 selfloop transitions, 151 changer transitions 7/831 dead transitions. [2022-12-05 18:57:24,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 831 transitions, 6728 flow [2022-12-05 18:57:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 18:57:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 18:57:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4238 transitions. [2022-12-05 18:57:24,476 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7767595307917888 [2022-12-05 18:57:24,476 INFO L175 Difference]: Start difference. First operand has 432 places, 536 transitions, 3488 flow. Second operand 16 states and 4238 transitions. [2022-12-05 18:57:24,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 831 transitions, 6728 flow [2022-12-05 18:57:26,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 831 transitions, 6560 flow, removed 84 selfloop flow, removed 2 redundant places. [2022-12-05 18:57:26,288 INFO L231 Difference]: Finished difference. Result has 454 places, 579 transitions, 4482 flow [2022-12-05 18:57:26,289 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4482, PETRI_PLACES=454, PETRI_TRANSITIONS=579} [2022-12-05 18:57:26,289 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 142 predicate places. [2022-12-05 18:57:26,290 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 579 transitions, 4482 flow [2022-12-05 18:57:26,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:57:26,291 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:57:26,291 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:57:26,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 18:57:26,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:57:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:57:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash 162956790, now seen corresponding path program 7 times [2022-12-05 18:57:26,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:57:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345829601] [2022-12-05 18:57:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:57:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:57:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:57:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:57:26,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:57:26,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345829601] [2022-12-05 18:57:26,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345829601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:57:26,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:57:26,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:57:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116941201] [2022-12-05 18:57:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:57:26,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:57:26,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:57:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:57:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:57:26,677 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:57:26,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 579 transitions, 4482 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:57:26,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:57:26,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:57:26,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 18:57:42,103 INFO L130 PetriNetUnfolder]: 26515/87896 cut-off events. [2022-12-05 18:57:42,103 INFO L131 PetriNetUnfolder]: For 432217/433568 co-relation queries the response was YES. [2022-12-05 18:57:43,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247424 conditions, 87896 events. 26515/87896 cut-off events. For 432217/433568 co-relation queries the response was YES. Maximal size of possible extension queue 3076. Compared 1320471 event pairs, 7131 based on Foata normal form. 263/81159 useless extension candidates. Maximal degree in co-relation 247350. Up to 9599 conditions per place. [2022-12-05 18:57:43,533 INFO L137 encePairwiseOnDemand]: 316/341 looper letters, 447 selfloop transitions, 223 changer transitions 10/922 dead transitions. [2022-12-05 18:57:43,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 922 transitions, 8109 flow [2022-12-05 18:57:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 18:57:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 18:57:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5302 transitions. [2022-12-05 18:57:43,537 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7774193548387097 [2022-12-05 18:57:43,537 INFO L175 Difference]: Start difference. First operand has 454 places, 579 transitions, 4482 flow. Second operand 20 states and 5302 transitions. [2022-12-05 18:57:43,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 922 transitions, 8109 flow [2022-12-05 18:57:47,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 922 transitions, 7775 flow, removed 166 selfloop flow, removed 3 redundant places. [2022-12-05 18:57:47,031 INFO L231 Difference]: Finished difference. Result has 482 places, 632 transitions, 5656 flow [2022-12-05 18:57:47,032 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=4204, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5656, PETRI_PLACES=482, PETRI_TRANSITIONS=632} [2022-12-05 18:57:47,032 INFO L294 CegarLoopForPetriNet]: 312 programPoint places, 170 predicate places. [2022-12-05 18:57:47,032 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 632 transitions, 5656 flow [2022-12-05 18:57:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:57:47,033 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 18:57:47,034 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 18:57:47,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-05 18:57:47,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 18:57:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 18:57:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash -927473336, now seen corresponding path program 8 times [2022-12-05 18:57:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 18:57:47,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757268708] [2022-12-05 18:57:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 18:57:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 18:57:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 18:57:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-05 18:57:47,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 18:57:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757268708] [2022-12-05 18:57:47,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757268708] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 18:57:47,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 18:57:47,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-05 18:57:47,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073181326] [2022-12-05 18:57:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 18:57:47,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 18:57:47,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 18:57:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 18:57:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-05 18:57:47,424 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 341 [2022-12-05 18:57:47,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 632 transitions, 5656 flow. Second operand has 14 states, 14 states have (on average 250.57142857142858) internal successors, (3508), 14 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 18:57:47,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 18:57:47,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 341 [2022-12-05 18:57:47,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand