/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/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:06:24,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:06:24,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:06:24,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:06:24,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:06:24,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:06:24,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:06:24,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:06:24,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:06:24,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:06:24,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:06:24,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:06:24,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:06:24,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:06:24,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:06:24,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:06:24,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:06:24,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:06:24,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:06:24,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:06:24,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:06:24,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:06:24,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:06:24,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:06:24,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 21:06:24,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 21:06:24,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 21:06:24,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 21:06:24,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 21:06:24,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 21:06:24,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:06:24,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:06:24,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:06:24,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:06:24,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:06:24,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:06:24,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:06:24,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:06:24,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:06:24,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:06:24,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:06:24,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-20 21:06:24,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:06:24,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:06:24,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:06:24,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:06:24,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:06:24,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:06:24,685 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:06:24,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:06:24,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:06:24,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:06:24,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:06:24,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:06:24,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:06:24,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:06:24,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:06:24,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:06:24,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:06:24,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:06:24,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:06:24,867 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:06:24,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-09-20 21:06:24,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cdd02c8/43034ab6a51b4c5f87927b87a17c02b9/FLAGa42a7429a [2022-09-20 21:06:25,244 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:06:25,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-09-20 21:06:25,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cdd02c8/43034ab6a51b4c5f87927b87a17c02b9/FLAGa42a7429a [2022-09-20 21:06:25,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cdd02c8/43034ab6a51b4c5f87927b87a17c02b9 [2022-09-20 21:06:25,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:06:25,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:06:25,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:06:25,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:06:25,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:06:25,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674280b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25, skipping insertion in model container [2022-09-20 21:06:25,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:06:25,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:06:25,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-09-20 21:06:25,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:06:25,885 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:06:25,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-09-20 21:06:25,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:06:25,918 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:06:25,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25 WrapperNode [2022-09-20 21:06:25,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:06:25,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:06:25,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:06:25,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:06:25,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,954 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-09-20 21:06:25,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:06:25,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:06:25,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:06:25,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:06:25,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:06:25,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:06:25,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:06:25,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:06:25,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (1/1) ... [2022-09-20 21:06:25,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:06:25,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:06:26,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 21:06:26,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 21:06:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:06:26,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:06:26,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-20 21:06:26,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:06:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:06:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:06:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 21:06:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:06:26,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:06:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:06:26,063 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 21:06:26,160 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:06:26,161 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:06:26,561 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:06:26,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:06:26,673 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-09-20 21:06:26,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:06:26 BoogieIcfgContainer [2022-09-20 21:06:26,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:06:26,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:06:26,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:06:26,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:06:26,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:06:25" (1/3) ... [2022-09-20 21:06:26,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f30389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:06:26, skipping insertion in model container [2022-09-20 21:06:26,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:06:25" (2/3) ... [2022-09-20 21:06:26,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f30389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:06:26, skipping insertion in model container [2022-09-20 21:06:26,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:06:26" (3/3) ... [2022-09-20 21:06:26,681 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-09-20 21:06:26,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:06:26,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:06:26,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:06:26,758 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 21:06:26,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-09-20 21:06:26,938 INFO L130 PetriNetUnfolder]: 22/264 cut-off events. [2022-09-20 21:06:26,938 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:06:26,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 159 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-09-20 21:06:26,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2022-09-20 21:06:26,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2022-09-20 21:06:26,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:06:26,970 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;@504fcc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:06:26,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 21:06:27,015 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2022-09-20 21:06:27,015 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:06:27,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:27,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:27,016 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)] === [2022-09-20 21:06:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1623224734, now seen corresponding path program 1 times [2022-09-20 21:06:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:27,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116533233] [2022-09-20 21:06:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:27,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:06:27,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:27,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116533233] [2022-09-20 21:06:27,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116533233] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:27,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:27,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:06:27,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256144733] [2022-09-20 21:06:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:06:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:06:27,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:06:27,273 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2022-09-20 21:06:27,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:27,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2022-09-20 21:06:27,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:27,457 INFO L130 PetriNetUnfolder]: 137/624 cut-off events. [2022-09-20 21:06:27,458 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-09-20 21:06:27,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2435 event pairs, 74 based on Foata normal form. 97/654 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2022-09-20 21:06:27,462 INFO L137 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2022-09-20 21:06:27,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2022-09-20 21:06:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:06:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:06:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-09-20 21:06:27,472 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2022-09-20 21:06:27,472 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-09-20 21:06:27,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-09-20 21:06:27,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:27,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-09-20 21:06:27,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,482 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,483 INFO L175 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2022-09-20 21:06:27,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2022-09-20 21:06:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 21:06:27,490 INFO L231 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2022-09-20 21:06:27,491 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2022-09-20 21:06:27,493 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2022-09-20 21:06:27,493 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2022-09-20 21:06:27,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:27,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:27,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:06:27,494 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)] === [2022-09-20 21:06:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1873370169, now seen corresponding path program 1 times [2022-09-20 21:06:27,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783285278] [2022-09-20 21:06:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:27,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:06:27,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783285278] [2022-09-20 21:06:27,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783285278] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:27,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:06:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814650941] [2022-09-20 21:06:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:27,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:06:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:06:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:06:27,674 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2022-09-20 21:06:27,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:27,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2022-09-20 21:06:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:27,771 INFO L130 PetriNetUnfolder]: 125/535 cut-off events. [2022-09-20 21:06:27,771 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-09-20 21:06:27,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1780 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 748. Up to 143 conditions per place. [2022-09-20 21:06:27,774 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 23 selfloop transitions, 4 changer transitions 0/236 dead transitions. [2022-09-20 21:06:27,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 534 flow [2022-09-20 21:06:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:06:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:06:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2022-09-20 21:06:27,778 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8963795255930087 [2022-09-20 21:06:27,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2022-09-20 21:06:27,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2022-09-20 21:06:27,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:27,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2022-09-20 21:06:27,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,782 INFO L175 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 718 transitions. [2022-09-20 21:06:27,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 534 flow [2022-09-20 21:06:27,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:06:27,786 INFO L231 Difference]: Finished difference. Result has 231 places, 230 transitions, 482 flow [2022-09-20 21:06:27,787 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-09-20 21:06:27,787 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2022-09-20 21:06:27,787 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 482 flow [2022-09-20 21:06:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:27,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:27,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:06:27,788 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)] === [2022-09-20 21:06:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1196353733, now seen corresponding path program 2 times [2022-09-20 21:06:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:27,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129196769] [2022-09-20 21:06:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:06:27,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:27,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129196769] [2022-09-20 21:06:27,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129196769] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:27,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:27,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:06:27,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637765388] [2022-09-20 21:06:27,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:27,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:06:27,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:06:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:06:27,911 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-09-20 21:06:27,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:27,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:27,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-09-20 21:06:27,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:28,152 INFO L130 PetriNetUnfolder]: 152/705 cut-off events. [2022-09-20 21:06:28,153 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-09-20 21:06:28,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 705 events. 152/705 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2632 event pairs, 84 based on Foata normal form. 9/667 useless extension candidates. Maximal degree in co-relation 1090. Up to 210 conditions per place. [2022-09-20 21:06:28,157 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 48 selfloop transitions, 8 changer transitions 21/255 dead transitions. [2022-09-20 21:06:28,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 255 transitions, 690 flow [2022-09-20 21:06:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 21:06:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 21:06:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1868 transitions. [2022-09-20 21:06:28,160 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7773616312942155 [2022-09-20 21:06:28,160 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1868 transitions. [2022-09-20 21:06:28,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1868 transitions. [2022-09-20 21:06:28,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:28,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1868 transitions. [2022-09-20 21:06:28,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.55555555555554) internal successors, (1868), 9 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,168 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,168 INFO L175 Difference]: Start difference. First operand has 231 places, 230 transitions, 482 flow. Second operand 9 states and 1868 transitions. [2022-09-20 21:06:28,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 255 transitions, 690 flow [2022-09-20 21:06:28,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 255 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:06:28,173 INFO L231 Difference]: Finished difference. Result has 240 places, 231 transitions, 506 flow [2022-09-20 21:06:28,173 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=506, PETRI_PLACES=240, PETRI_TRANSITIONS=231} [2022-09-20 21:06:28,174 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2022-09-20 21:06:28,175 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 231 transitions, 506 flow [2022-09-20 21:06:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:28,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 21:06:28,176 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)] === [2022-09-20 21:06:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1990682287, now seen corresponding path program 1 times [2022-09-20 21:06:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892164507] [2022-09-20 21:06:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:06:28,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:28,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892164507] [2022-09-20 21:06:28,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892164507] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:28,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:28,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:06:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505002743] [2022-09-20 21:06:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:06:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:06:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:06:28,365 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2022-09-20 21:06:28,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 231 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:28,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2022-09-20 21:06:28,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:28,550 INFO L130 PetriNetUnfolder]: 245/864 cut-off events. [2022-09-20 21:06:28,550 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-09-20 21:06:28,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1481 conditions, 864 events. 245/864 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4092 event pairs, 84 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1474. Up to 226 conditions per place. [2022-09-20 21:06:28,556 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/248 dead transitions. [2022-09-20 21:06:28,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 248 transitions, 685 flow [2022-09-20 21:06:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 21:06:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 21:06:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2022-09-20 21:06:28,560 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2022-09-20 21:06:28,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2022-09-20 21:06:28,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2022-09-20 21:06:28,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:28,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2022-09-20 21:06:28,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,566 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,566 INFO L175 Difference]: Start difference. First operand has 240 places, 231 transitions, 506 flow. Second operand 5 states and 1035 transitions. [2022-09-20 21:06:28,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 248 transitions, 685 flow [2022-09-20 21:06:28,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 248 transitions, 665 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-09-20 21:06:28,573 INFO L231 Difference]: Finished difference. Result has 239 places, 232 transitions, 504 flow [2022-09-20 21:06:28,573 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=504, PETRI_PLACES=239, PETRI_TRANSITIONS=232} [2022-09-20 21:06:28,575 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -2 predicate places. [2022-09-20 21:06:28,575 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 232 transitions, 504 flow [2022-09-20 21:06:28,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:28,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 21:06:28,582 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)] === [2022-09-20 21:06:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1743404935, now seen corresponding path program 1 times [2022-09-20 21:06:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:28,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527825928] [2022-09-20 21:06:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:28,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:06:28,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527825928] [2022-09-20 21:06:28,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527825928] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:28,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:28,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:06:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623742322] [2022-09-20 21:06:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:06:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:06:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:06:28,717 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-09-20 21:06:28,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 232 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:28,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-09-20 21:06:28,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:28,795 INFO L130 PetriNetUnfolder]: 138/574 cut-off events. [2022-09-20 21:06:28,796 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-09-20 21:06:28,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 574 events. 138/574 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1969 event pairs, 50 based on Foata normal form. 11/556 useless extension candidates. Maximal degree in co-relation 896. Up to 127 conditions per place. [2022-09-20 21:06:28,798 INFO L137 encePairwiseOnDemand]: 264/267 looper letters, 21 selfloop transitions, 2 changer transitions 3/240 dead transitions. [2022-09-20 21:06:28,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 240 transitions, 578 flow [2022-09-20 21:06:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:06:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:06:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2022-09-20 21:06:28,799 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9051186017478152 [2022-09-20 21:06:28,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2022-09-20 21:06:28,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2022-09-20 21:06:28,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:28,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2022-09-20 21:06:28,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,803 INFO L175 Difference]: Start difference. First operand has 239 places, 232 transitions, 504 flow. Second operand 3 states and 725 transitions. [2022-09-20 21:06:28,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 240 transitions, 578 flow [2022-09-20 21:06:28,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 240 transitions, 572 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-09-20 21:06:28,807 INFO L231 Difference]: Finished difference. Result has 237 places, 233 transitions, 510 flow [2022-09-20 21:06:28,807 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=510, PETRI_PLACES=237, PETRI_TRANSITIONS=233} [2022-09-20 21:06:28,809 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -4 predicate places. [2022-09-20 21:06:28,809 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 233 transitions, 510 flow [2022-09-20 21:06:28,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:28,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 21:06:28,810 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)] === [2022-09-20 21:06:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -727349201, now seen corresponding path program 2 times [2022-09-20 21:06:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40128133] [2022-09-20 21:06:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:28,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:06:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:28,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40128133] [2022-09-20 21:06:28,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40128133] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:28,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:28,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:06:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830903074] [2022-09-20 21:06:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:06:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:06:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:06:28,935 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-09-20 21:06:28,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 233 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:28,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:28,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-09-20 21:06:28,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:29,087 INFO L130 PetriNetUnfolder]: 188/776 cut-off events. [2022-09-20 21:06:29,087 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-09-20 21:06:29,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 776 events. 188/776 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3236 event pairs, 121 based on Foata normal form. 9/743 useless extension candidates. Maximal degree in co-relation 1318. Up to 224 conditions per place. [2022-09-20 21:06:29,091 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 52 selfloop transitions, 6 changer transitions 12/249 dead transitions. [2022-09-20 21:06:29,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 249 transitions, 693 flow [2022-09-20 21:06:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:06:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:06:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1460 transitions. [2022-09-20 21:06:29,093 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7811663991439273 [2022-09-20 21:06:29,093 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1460 transitions. [2022-09-20 21:06:29,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1460 transitions. [2022-09-20 21:06:29,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:29,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1460 transitions. [2022-09-20 21:06:29,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,100 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,100 INFO L175 Difference]: Start difference. First operand has 237 places, 233 transitions, 510 flow. Second operand 7 states and 1460 transitions. [2022-09-20 21:06:29,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 249 transitions, 693 flow [2022-09-20 21:06:29,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 249 transitions, 691 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:06:29,105 INFO L231 Difference]: Finished difference. Result has 244 places, 234 transitions, 530 flow [2022-09-20 21:06:29,105 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=244, PETRI_TRANSITIONS=234} [2022-09-20 21:06:29,107 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 3 predicate places. [2022-09-20 21:06:29,107 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 234 transitions, 530 flow [2022-09-20 21:06:29,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:29,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:29,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 21:06:29,108 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)] === [2022-09-20 21:06:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:29,108 INFO L85 PathProgramCache]: Analyzing trace with hash -351426333, now seen corresponding path program 1 times [2022-09-20 21:06:29,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:29,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078228709] [2022-09-20 21:06:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:29,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:29,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078228709] [2022-09-20 21:06:29,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078228709] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:29,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:29,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:06:29,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430062438] [2022-09-20 21:06:29,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:29,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:06:29,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:06:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:06:29,246 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-09-20 21:06:29,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 234 transitions, 530 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:29,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-09-20 21:06:29,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:29,398 INFO L130 PetriNetUnfolder]: 140/720 cut-off events. [2022-09-20 21:06:29,398 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2022-09-20 21:06:29,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 720 events. 140/720 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2321 event pairs, 82 based on Foata normal form. 8/695 useless extension candidates. Maximal degree in co-relation 1190. Up to 247 conditions per place. [2022-09-20 21:06:29,401 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 51 selfloop transitions, 8 changer transitions 30/268 dead transitions. [2022-09-20 21:06:29,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 268 transitions, 801 flow [2022-09-20 21:06:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 21:06:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 21:06:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1877 transitions. [2022-09-20 21:06:29,404 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7811069496462755 [2022-09-20 21:06:29,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1877 transitions. [2022-09-20 21:06:29,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1877 transitions. [2022-09-20 21:06:29,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:29,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1877 transitions. [2022-09-20 21:06:29,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.55555555555554) internal successors, (1877), 9 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,410 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,410 INFO L175 Difference]: Start difference. First operand has 244 places, 234 transitions, 530 flow. Second operand 9 states and 1877 transitions. [2022-09-20 21:06:29,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 268 transitions, 801 flow [2022-09-20 21:06:29,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 268 transitions, 783 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-09-20 21:06:29,414 INFO L231 Difference]: Finished difference. Result has 248 places, 235 transitions, 550 flow [2022-09-20 21:06:29,415 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=248, PETRI_TRANSITIONS=235} [2022-09-20 21:06:29,415 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-09-20 21:06:29,415 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 235 transitions, 550 flow [2022-09-20 21:06:29,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:29,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:29,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 21:06:29,416 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)] === [2022-09-20 21:06:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1861871023, now seen corresponding path program 1 times [2022-09-20 21:06:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:29,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407424189] [2022-09-20 21:06:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:29,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407424189] [2022-09-20 21:06:29,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407424189] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:06:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143747724] [2022-09-20 21:06:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:29,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:06:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:06:29,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:06:29,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 21:06:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:06:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:06:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:30,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:06:30,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-09-20 21:06:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:30,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143747724] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:06:30,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:06:30,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-09-20 21:06:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446087257] [2022-09-20 21:06:30,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:06:30,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-09-20 21:06:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-09-20 21:06:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:06:30,550 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-09-20 21:06:30,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 235 transitions, 550 flow. Second operand has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:30,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:30,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-09-20 21:06:30,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:31,005 INFO L130 PetriNetUnfolder]: 189/967 cut-off events. [2022-09-20 21:06:31,006 INFO L131 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2022-09-20 21:06:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 967 events. 189/967 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4283 event pairs, 64 based on Foata normal form. 56/973 useless extension candidates. Maximal degree in co-relation 1735. Up to 187 conditions per place. [2022-09-20 21:06:31,010 INFO L137 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 61/307 dead transitions. [2022-09-20 21:06:31,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 307 transitions, 1041 flow [2022-09-20 21:06:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:06:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:06:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4161 transitions. [2022-09-20 21:06:31,017 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7421080791867308 [2022-09-20 21:06:31,017 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4161 transitions. [2022-09-20 21:06:31,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4161 transitions. [2022-09-20 21:06:31,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:31,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4161 transitions. [2022-09-20 21:06:31,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.14285714285714) internal successors, (4161), 21 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:31,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:31,034 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:31,034 INFO L175 Difference]: Start difference. First operand has 248 places, 235 transitions, 550 flow. Second operand 21 states and 4161 transitions. [2022-09-20 21:06:31,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 307 transitions, 1041 flow [2022-09-20 21:06:31,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 307 transitions, 1023 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-20 21:06:31,040 INFO L231 Difference]: Finished difference. Result has 270 places, 240 transitions, 640 flow [2022-09-20 21:06:31,041 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=640, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2022-09-20 21:06:31,042 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 29 predicate places. [2022-09-20 21:06:31,043 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 640 flow [2022-09-20 21:06:31,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:31,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:31,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:31,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-09-20 21:06:31,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:06:31,272 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)] === [2022-09-20 21:06:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash 911521251, now seen corresponding path program 2 times [2022-09-20 21:06:31,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:31,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164380463] [2022-09-20 21:06:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 21:06:31,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164380463] [2022-09-20 21:06:31,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164380463] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:06:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790585895] [2022-09-20 21:06:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:06:31,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:06:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:06:31,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:06:31,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 21:06:31,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:06:31,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:06:31,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 37 conjunts are in the unsatisfiable core [2022-09-20 21:06:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:06:32,171 INFO L356 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2022-09-20 21:06:32,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2022-09-20 21:06:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:32,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:06:32,393 INFO L356 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-09-20 21:06:32,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 19 [2022-09-20 21:06:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:32,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790585895] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:06:32,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:06:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 28 [2022-09-20 21:06:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470304767] [2022-09-20 21:06:32,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:06:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-09-20 21:06:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-09-20 21:06:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-09-20 21:06:32,899 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 267 [2022-09-20 21:06:32,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 640 flow. Second operand has 28 states, 28 states have (on average 184.25) internal successors, (5159), 28 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:32,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:32,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 267 [2022-09-20 21:06:32,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:33,612 INFO L130 PetriNetUnfolder]: 780/2072 cut-off events. [2022-09-20 21:06:33,613 INFO L131 PetriNetUnfolder]: For 3341/3451 co-relation queries the response was YES. [2022-09-20 21:06:33,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5130 conditions, 2072 events. 780/2072 cut-off events. For 3341/3451 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11594 event pairs, 115 based on Foata normal form. 1/1939 useless extension candidates. Maximal degree in co-relation 5110. Up to 626 conditions per place. [2022-09-20 21:06:33,640 INFO L137 encePairwiseOnDemand]: 234/267 looper letters, 145 selfloop transitions, 70 changer transitions 0/373 dead transitions. [2022-09-20 21:06:33,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 373 transitions, 1589 flow [2022-09-20 21:06:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-09-20 21:06:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-09-20 21:06:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5546 transitions. [2022-09-20 21:06:33,670 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6923845193508115 [2022-09-20 21:06:33,670 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5546 transitions. [2022-09-20 21:06:33,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5546 transitions. [2022-09-20 21:06:33,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:33,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5546 transitions. [2022-09-20 21:06:33,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 184.86666666666667) internal successors, (5546), 30 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:33,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 267.0) internal successors, (8277), 31 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:33,689 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 267.0) internal successors, (8277), 31 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:33,689 INFO L175 Difference]: Start difference. First operand has 270 places, 240 transitions, 640 flow. Second operand 30 states and 5546 transitions. [2022-09-20 21:06:33,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 373 transitions, 1589 flow [2022-09-20 21:06:33,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 373 transitions, 1446 flow, removed 50 selfloop flow, removed 10 redundant places. [2022-09-20 21:06:33,702 INFO L231 Difference]: Finished difference. Result has 295 places, 296 transitions, 1131 flow [2022-09-20 21:06:33,702 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1131, PETRI_PLACES=295, PETRI_TRANSITIONS=296} [2022-09-20 21:06:33,703 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 54 predicate places. [2022-09-20 21:06:33,703 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 296 transitions, 1131 flow [2022-09-20 21:06:33,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 184.25) internal successors, (5159), 28 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:33,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:33,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:33,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-09-20 21:06:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-09-20 21:06:33,920 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)] === [2022-09-20 21:06:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115921, now seen corresponding path program 3 times [2022-09-20 21:06:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:33,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020411104] [2022-09-20 21:06:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 21:06:34,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:34,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020411104] [2022-09-20 21:06:34,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020411104] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:34,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:34,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:06:34,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276186331] [2022-09-20 21:06:34,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:34,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:06:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:06:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:06:34,041 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 267 [2022-09-20 21:06:34,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 296 transitions, 1131 flow. Second operand has 5 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:34,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:34,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 267 [2022-09-20 21:06:34,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:34,500 INFO L130 PetriNetUnfolder]: 1077/2785 cut-off events. [2022-09-20 21:06:34,500 INFO L131 PetriNetUnfolder]: For 8331/8555 co-relation queries the response was YES. [2022-09-20 21:06:34,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9377 conditions, 2785 events. 1077/2785 cut-off events. For 8331/8555 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17722 event pairs, 322 based on Foata normal form. 31/2653 useless extension candidates. Maximal degree in co-relation 9348. Up to 808 conditions per place. [2022-09-20 21:06:34,524 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 98 selfloop transitions, 19 changer transitions 0/330 dead transitions. [2022-09-20 21:06:34,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 330 transitions, 1640 flow [2022-09-20 21:06:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 21:06:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 21:06:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1130 transitions. [2022-09-20 21:06:34,573 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.846441947565543 [2022-09-20 21:06:34,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1130 transitions. [2022-09-20 21:06:34,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1130 transitions. [2022-09-20 21:06:34,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:34,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1130 transitions. [2022-09-20 21:06:34,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:34,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:34,577 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:34,577 INFO L175 Difference]: Start difference. First operand has 295 places, 296 transitions, 1131 flow. Second operand 5 states and 1130 transitions. [2022-09-20 21:06:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 330 transitions, 1640 flow [2022-09-20 21:06:34,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 330 transitions, 1554 flow, removed 33 selfloop flow, removed 8 redundant places. [2022-09-20 21:06:34,589 INFO L231 Difference]: Finished difference. Result has 293 places, 302 transitions, 1181 flow [2022-09-20 21:06:34,590 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1181, PETRI_PLACES=293, PETRI_TRANSITIONS=302} [2022-09-20 21:06:34,591 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 52 predicate places. [2022-09-20 21:06:34,591 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 302 transitions, 1181 flow [2022-09-20 21:06:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:34,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-09-20 21:06:34,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:06:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1132058423, now seen corresponding path program 4 times [2022-09-20 21:06:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:34,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77708725] [2022-09-20 21:06:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 21:06:34,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77708725] [2022-09-20 21:06:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77708725] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:06:34,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:06:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-09-20 21:06:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581357598] [2022-09-20 21:06:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:06:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 21:06:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 21:06:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-09-20 21:06:34,800 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 267 [2022-09-20 21:06:34,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 302 transitions, 1181 flow. Second operand has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:34,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:34,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 267 [2022-09-20 21:06:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:06:35,617 INFO L130 PetriNetUnfolder]: 1388/3499 cut-off events. [2022-09-20 21:06:35,617 INFO L131 PetriNetUnfolder]: For 11420/11723 co-relation queries the response was YES. [2022-09-20 21:06:35,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12228 conditions, 3499 events. 1388/3499 cut-off events. For 11420/11723 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 24064 event pairs, 409 based on Foata normal form. 33/3318 useless extension candidates. Maximal degree in co-relation 12196. Up to 1075 conditions per place. [2022-09-20 21:06:35,646 INFO L137 encePairwiseOnDemand]: 242/267 looper letters, 110 selfloop transitions, 40 changer transitions 0/336 dead transitions. [2022-09-20 21:06:35,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 336 transitions, 1753 flow [2022-09-20 21:06:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-20 21:06:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-09-20 21:06:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3202 transitions. [2022-09-20 21:06:35,651 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7054417272526988 [2022-09-20 21:06:35,651 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3202 transitions. [2022-09-20 21:06:35,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3202 transitions. [2022-09-20 21:06:35,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:06:35,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3202 transitions. [2022-09-20 21:06:35,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 188.35294117647058) internal successors, (3202), 17 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:35,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:35,661 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:35,661 INFO L175 Difference]: Start difference. First operand has 293 places, 302 transitions, 1181 flow. Second operand 17 states and 3202 transitions. [2022-09-20 21:06:35,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 336 transitions, 1753 flow [2022-09-20 21:06:35,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 336 transitions, 1745 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-09-20 21:06:35,675 INFO L231 Difference]: Finished difference. Result has 310 places, 307 transitions, 1333 flow [2022-09-20 21:06:35,676 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1333, PETRI_PLACES=310, PETRI_TRANSITIONS=307} [2022-09-20 21:06:35,676 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 69 predicate places. [2022-09-20 21:06:35,676 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 307 transitions, 1333 flow [2022-09-20 21:06:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:35,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:06:35,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:06:35,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-20 21:06:35,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:06:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:06:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1027077285, now seen corresponding path program 5 times [2022-09-20 21:06:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:06:35,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446448137] [2022-09-20 21:06:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:06:35,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:06:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:06:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:06:36,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:06:36,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446448137] [2022-09-20 21:06:36,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446448137] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:06:36,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937540561] [2022-09-20 21:06:36,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:06:36,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:06:36,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:06:36,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:06:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 21:06:36,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:06:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:06:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 66 conjunts are in the unsatisfiable core [2022-09-20 21:06:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:06:36,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:06:36,543 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-09-20 21:06:36,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-09-20 21:06:36,653 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-09-20 21:06:36,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-09-20 21:06:37,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-09-20 21:06:37,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-09-20 21:06:37,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-09-20 21:06:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:06:37,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:06:38,491 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:06:38,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 150 [2022-09-20 21:06:38,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-09-20 21:06:38,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 94 [2022-09-20 21:06:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:06:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937540561] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:06:39,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:06:39,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 23] total 66 [2022-09-20 21:06:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836876116] [2022-09-20 21:06:39,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:06:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-09-20 21:06:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:06:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-09-20 21:06:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3949, Unknown=1, NotChecked=0, Total=4290 [2022-09-20 21:06:39,624 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 267 [2022-09-20 21:06:39,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 307 transitions, 1333 flow. Second operand has 66 states, 66 states have (on average 144.9090909090909) internal successors, (9564), 66 states have internal predecessors, (9564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:06:39,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:06:39,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 267 [2022-09-20 21:06:39,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:07:02,311 INFO L130 PetriNetUnfolder]: 11842/29421 cut-off events. [2022-09-20 21:07:02,311 INFO L131 PetriNetUnfolder]: For 118982/120413 co-relation queries the response was YES. [2022-09-20 21:07:02,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104367 conditions, 29421 events. 11842/29421 cut-off events. For 118982/120413 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 305616 event pairs, 514 based on Foata normal form. 1611/29109 useless extension candidates. Maximal degree in co-relation 104332. Up to 6986 conditions per place. [2022-09-20 21:07:02,592 INFO L137 encePairwiseOnDemand]: 199/267 looper letters, 1015 selfloop transitions, 706 changer transitions 30/1877 dead transitions. [2022-09-20 21:07:02,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 1877 transitions, 16559 flow [2022-09-20 21:07:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-09-20 21:07:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2022-09-20 21:07:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 31749 transitions. [2022-09-20 21:07:02,636 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5505097794423637 [2022-09-20 21:07:02,637 INFO L72 ComplementDD]: Start complementDD. Operand 216 states and 31749 transitions. [2022-09-20 21:07:02,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 31749 transitions. [2022-09-20 21:07:02,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:07:02,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 216 states and 31749 transitions. [2022-09-20 21:07:02,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 217 states, 216 states have (on average 146.98611111111111) internal successors, (31749), 216 states have internal predecessors, (31749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:02,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 217 states, 217 states have (on average 267.0) internal successors, (57939), 217 states have internal predecessors, (57939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:02,768 INFO L81 ComplementDD]: Finished complementDD. Result has 217 states, 217 states have (on average 267.0) internal successors, (57939), 217 states have internal predecessors, (57939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:02,768 INFO L175 Difference]: Start difference. First operand has 310 places, 307 transitions, 1333 flow. Second operand 216 states and 31749 transitions. [2022-09-20 21:07:02,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 1877 transitions, 16559 flow [2022-09-20 21:07:02,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1877 transitions, 16089 flow, removed 188 selfloop flow, removed 13 redundant places. [2022-09-20 21:07:02,851 INFO L231 Difference]: Finished difference. Result has 612 places, 978 transitions, 9982 flow [2022-09-20 21:07:02,852 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=9982, PETRI_PLACES=612, PETRI_TRANSITIONS=978} [2022-09-20 21:07:02,852 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 371 predicate places. [2022-09-20 21:07:02,852 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 978 transitions, 9982 flow [2022-09-20 21:07:02,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 144.9090909090909) internal successors, (9564), 66 states have internal predecessors, (9564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:02,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:07:02,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:07:02,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 21:07:03,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:07:03,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:07:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:07:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1975249845, now seen corresponding path program 1 times [2022-09-20 21:07:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:07:03,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104600114] [2022-09-20 21:07:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:07:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:07:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:07:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:07:03,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:07:03,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104600114] [2022-09-20 21:07:03,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104600114] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:07:03,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435098849] [2022-09-20 21:07:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:07:03,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:07:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:07:03,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:07:03,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 21:07:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:07:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:07:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:07:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:07:03,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:07:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:07:04,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435098849] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:07:04,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:07:04,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-09-20 21:07:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341920259] [2022-09-20 21:07:04,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:07:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-09-20 21:07:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:07:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-09-20 21:07:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:07:04,196 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-09-20 21:07:04,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 978 transitions, 9982 flow. Second operand has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:04,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:07:04,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-09-20 21:07:04,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:07:07,530 INFO L130 PetriNetUnfolder]: 3130/9552 cut-off events. [2022-09-20 21:07:07,530 INFO L131 PetriNetUnfolder]: For 273061/276916 co-relation queries the response was YES. [2022-09-20 21:07:07,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56196 conditions, 9552 events. 3130/9552 cut-off events. For 273061/276916 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 92173 event pairs, 867 based on Foata normal form. 369/9152 useless extension candidates. Maximal degree in co-relation 56062. Up to 2338 conditions per place. [2022-09-20 21:07:07,691 INFO L137 encePairwiseOnDemand]: 247/267 looper letters, 148 selfloop transitions, 45 changer transitions 227/630 dead transitions. [2022-09-20 21:07:07,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 630 transitions, 6364 flow [2022-09-20 21:07:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-09-20 21:07:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-09-20 21:07:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3943 transitions. [2022-09-20 21:07:07,694 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7383895131086142 [2022-09-20 21:07:07,694 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3943 transitions. [2022-09-20 21:07:07,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3943 transitions. [2022-09-20 21:07:07,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:07:07,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3943 transitions. [2022-09-20 21:07:07,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.15) internal successors, (3943), 20 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:07,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:07,706 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:07,706 INFO L175 Difference]: Start difference. First operand has 612 places, 978 transitions, 9982 flow. Second operand 20 states and 3943 transitions. [2022-09-20 21:07:07,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 630 transitions, 6364 flow [2022-09-20 21:07:08,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 630 transitions, 5174 flow, removed 465 selfloop flow, removed 104 redundant places. [2022-09-20 21:07:08,919 INFO L231 Difference]: Finished difference. Result has 482 places, 397 transitions, 2311 flow [2022-09-20 21:07:08,920 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2311, PETRI_PLACES=482, PETRI_TRANSITIONS=397} [2022-09-20 21:07:08,920 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 241 predicate places. [2022-09-20 21:07:08,920 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 397 transitions, 2311 flow [2022-09-20 21:07:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:07:08,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:07:08,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-09-20 21:07:09,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:07:09,136 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:07:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:07:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash -842068221, now seen corresponding path program 2 times [2022-09-20 21:07:09,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:07:09,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679580369] [2022-09-20 21:07:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:07:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:07:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:07:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 21:07:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:07:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679580369] [2022-09-20 21:07:09,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679580369] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:07:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141833099] [2022-09-20 21:07:09,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:07:09,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:07:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:07:09,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:07:09,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 21:07:09,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:07:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:07:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:07:09,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:07:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 21:07:09,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:07:09,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141833099] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:07:09,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:07:09,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-09-20 21:07:09,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258898024] [2022-09-20 21:07:09,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:07:09,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 21:07:09,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:07:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 21:07:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:07:09,446 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-09-20 21:07:09,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 397 transitions, 2311 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:09,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:07:09,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-09-20 21:07:09,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:07:11,413 INFO L130 PetriNetUnfolder]: 3408/9249 cut-off events. [2022-09-20 21:07:11,413 INFO L131 PetriNetUnfolder]: For 52390/53294 co-relation queries the response was YES. [2022-09-20 21:07:11,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36038 conditions, 9249 events. 3408/9249 cut-off events. For 52390/53294 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 87487 event pairs, 727 based on Foata normal form. 374/8858 useless extension candidates. Maximal degree in co-relation 35965. Up to 2483 conditions per place. [2022-09-20 21:07:11,507 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 95 selfloop transitions, 59 changer transitions 0/448 dead transitions. [2022-09-20 21:07:11,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 448 transitions, 3139 flow [2022-09-20 21:07:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 21:07:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 21:07:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2022-09-20 21:07:11,508 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2022-09-20 21:07:11,508 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2022-09-20 21:07:11,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2022-09-20 21:07:11,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:07:11,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2022-09-20 21:07:11,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:11,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:11,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:11,510 INFO L175 Difference]: Start difference. First operand has 482 places, 397 transitions, 2311 flow. Second operand 4 states and 971 transitions. [2022-09-20 21:07:11,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 448 transitions, 3139 flow [2022-09-20 21:07:11,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 448 transitions, 2898 flow, removed 62 selfloop flow, removed 38 redundant places. [2022-09-20 21:07:11,575 INFO L231 Difference]: Finished difference. Result has 375 places, 423 transitions, 2705 flow [2022-09-20 21:07:11,576 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2705, PETRI_PLACES=375, PETRI_TRANSITIONS=423} [2022-09-20 21:07:11,576 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 134 predicate places. [2022-09-20 21:07:11,576 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 423 transitions, 2705 flow [2022-09-20 21:07:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:11,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:07:11,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:07:11,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 21:07:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-09-20 21:07:11,792 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:07:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:07:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -622525943, now seen corresponding path program 3 times [2022-09-20 21:07:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:07:11,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377830756] [2022-09-20 21:07:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:07:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:07:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:07:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:07:12,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:07:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377830756] [2022-09-20 21:07:12,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377830756] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:07:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752651454] [2022-09-20 21:07:12,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:07:12,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:07:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:07:12,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:07:12,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 21:07:12,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:07:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:07:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 57 conjunts are in the unsatisfiable core [2022-09-20 21:07:12,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:07:12,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-09-20 21:07:13,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-09-20 21:07:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 21:07:13,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:07:13,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:07:13,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-09-20 21:07:13,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:07:13,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2022-09-20 21:07:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 21:07:14,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752651454] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:07:14,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:07:14,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 10] total 45 [2022-09-20 21:07:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165724269] [2022-09-20 21:07:14,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:07:14,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-09-20 21:07:14,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:07:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-09-20 21:07:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2022-09-20 21:07:14,096 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 267 [2022-09-20 21:07:14,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 423 transitions, 2705 flow. Second operand has 45 states, 45 states have (on average 152.6) internal successors, (6867), 45 states have internal predecessors, (6867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:14,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:07:14,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 267 [2022-09-20 21:07:14,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:07:34,835 INFO L130 PetriNetUnfolder]: 39279/75013 cut-off events. [2022-09-20 21:07:34,835 INFO L131 PetriNetUnfolder]: For 495939/503531 co-relation queries the response was YES. [2022-09-20 21:07:35,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332324 conditions, 75013 events. 39279/75013 cut-off events. For 495939/503531 co-relation queries the response was YES. Maximal size of possible extension queue 2607. Compared 775586 event pairs, 6628 based on Foata normal form. 618/68743 useless extension candidates. Maximal degree in co-relation 332275. Up to 19908 conditions per place. [2022-09-20 21:07:36,100 INFO L137 encePairwiseOnDemand]: 213/267 looper letters, 1629 selfloop transitions, 534 changer transitions 0/2290 dead transitions. [2022-09-20 21:07:36,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 2290 transitions, 25934 flow [2022-09-20 21:07:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-09-20 21:07:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-09-20 21:07:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 18509 transitions. [2022-09-20 21:07:36,113 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5825386334309004 [2022-09-20 21:07:36,113 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 18509 transitions. [2022-09-20 21:07:36,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 18509 transitions. [2022-09-20 21:07:36,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:07:36,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 18509 transitions. [2022-09-20 21:07:36,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 155.53781512605042) internal successors, (18509), 119 states have internal predecessors, (18509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:36,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 267.0) internal successors, (32040), 120 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:36,155 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 267.0) internal successors, (32040), 120 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:36,155 INFO L175 Difference]: Start difference. First operand has 375 places, 423 transitions, 2705 flow. Second operand 119 states and 18509 transitions. [2022-09-20 21:07:36,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 2290 transitions, 25934 flow [2022-09-20 21:07:36,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 2290 transitions, 25704 flow, removed 115 selfloop flow, removed 0 redundant places. [2022-09-20 21:07:36,951 INFO L231 Difference]: Finished difference. Result has 508 places, 892 transitions, 9752 flow [2022-09-20 21:07:36,952 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=9752, PETRI_PLACES=508, PETRI_TRANSITIONS=892} [2022-09-20 21:07:36,952 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 267 predicate places. [2022-09-20 21:07:36,953 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 892 transitions, 9752 flow [2022-09-20 21:07:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 152.6) internal successors, (6867), 45 states have internal predecessors, (6867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:36,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:07:36,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:07:36,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-20 21:07:37,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-20 21:07:37,161 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:07:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:07:37,162 INFO L85 PathProgramCache]: Analyzing trace with hash -435636949, now seen corresponding path program 4 times [2022-09-20 21:07:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:07:37,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862201243] [2022-09-20 21:07:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:07:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:07:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:07:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:07:37,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:07:37,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862201243] [2022-09-20 21:07:37,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862201243] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:07:37,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319587474] [2022-09-20 21:07:37,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:07:37,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:07:37,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:07:37,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:07:37,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 21:07:38,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:07:38,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:07:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 90 conjunts are in the unsatisfiable core [2022-09-20 21:07:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:07:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:07:39,798 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-09-20 21:07:39,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2022-09-20 21:07:39,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-09-20 21:07:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:07:41,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:07:42,715 INFO L356 Elim1Store]: treesize reduction 40, result has 77.7 percent of original size [2022-09-20 21:07:42,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 194 [2022-09-20 21:07:42,732 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:07:42,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-09-20 21:07:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:07:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319587474] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:07:45,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:07:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37, 36] total 96 [2022-09-20 21:07:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443759688] [2022-09-20 21:07:45,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:07:45,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-09-20 21:07:45,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:07:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-09-20 21:07:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=8394, Unknown=0, NotChecked=0, Total=9120 [2022-09-20 21:07:45,390 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 267 [2022-09-20 21:07:45,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 892 transitions, 9752 flow. Second operand has 96 states, 96 states have (on average 111.89583333333333) internal successors, (10742), 96 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:07:45,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:07:45,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 267 [2022-09-20 21:07:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:08:28,621 INFO L130 PetriNetUnfolder]: 58682/118027 cut-off events. [2022-09-20 21:08:28,622 INFO L131 PetriNetUnfolder]: For 934607/946537 co-relation queries the response was YES. [2022-09-20 21:08:30,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563782 conditions, 118027 events. 58682/118027 cut-off events. For 934607/946537 co-relation queries the response was YES. Maximal size of possible extension queue 3997. Compared 1352996 event pairs, 14784 based on Foata normal form. 1076/108833 useless extension candidates. Maximal degree in co-relation 563717. Up to 59540 conditions per place. [2022-09-20 21:08:31,147 INFO L137 encePairwiseOnDemand]: 191/267 looper letters, 1303 selfloop transitions, 1289 changer transitions 3/2695 dead transitions. [2022-09-20 21:08:31,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 2695 transitions, 35633 flow [2022-09-20 21:08:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-09-20 21:08:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2022-09-20 21:08:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 20326 transitions. [2022-09-20 21:08:31,161 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.422929671244278 [2022-09-20 21:08:31,161 INFO L72 ComplementDD]: Start complementDD. Operand 180 states and 20326 transitions. [2022-09-20 21:08:31,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 20326 transitions. [2022-09-20 21:08:31,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:08:31,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 180 states and 20326 transitions. [2022-09-20 21:08:31,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 181 states, 180 states have (on average 112.92222222222222) internal successors, (20326), 180 states have internal predecessors, (20326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:08:31,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 181 states, 181 states have (on average 267.0) internal successors, (48327), 181 states have internal predecessors, (48327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:08:31,215 INFO L81 ComplementDD]: Finished complementDD. Result has 181 states, 181 states have (on average 267.0) internal successors, (48327), 181 states have internal predecessors, (48327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:08:31,215 INFO L175 Difference]: Start difference. First operand has 508 places, 892 transitions, 9752 flow. Second operand 180 states and 20326 transitions. [2022-09-20 21:08:31,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 2695 transitions, 35633 flow [2022-09-20 21:08:35,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 2695 transitions, 34345 flow, removed 547 selfloop flow, removed 37 redundant places. [2022-09-20 21:08:35,060 INFO L231 Difference]: Finished difference. Result has 703 places, 2143 transitions, 29630 flow [2022-09-20 21:08:35,061 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=9116, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=180, PETRI_FLOW=29630, PETRI_PLACES=703, PETRI_TRANSITIONS=2143} [2022-09-20 21:08:35,061 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 462 predicate places. [2022-09-20 21:08:35,061 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 2143 transitions, 29630 flow [2022-09-20 21:08:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 111.89583333333333) internal successors, (10742), 96 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:08:35,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:08:35,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:08:35,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 21:08:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:08:35,269 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:08:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:08:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash -152244233, now seen corresponding path program 5 times [2022-09-20 21:08:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:08:35,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926337067] [2022-09-20 21:08:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:08:35,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:08:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:08:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:08:36,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:08:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926337067] [2022-09-20 21:08:36,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926337067] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:08:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99686163] [2022-09-20 21:08:36,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:08:36,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:08:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:08:36,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:08:36,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 21:08:36,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:08:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:08:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 70 conjunts are in the unsatisfiable core [2022-09-20 21:08:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:08:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:08:37,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-09-20 21:08:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-09-20 21:08:38,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:08:39,021 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:08:39,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 212 [2022-09-20 21:08:39,036 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:08:39,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 110 [2022-09-20 21:08:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:08:40,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99686163] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:08:40,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:08:40,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 25, 23] total 85 [2022-09-20 21:08:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897097871] [2022-09-20 21:08:40,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:08:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-09-20 21:08:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:08:40,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-09-20 21:08:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=6756, Unknown=1, NotChecked=0, Total=7140 [2022-09-20 21:08:40,571 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 267 [2022-09-20 21:08:40,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 2143 transitions, 29630 flow. Second operand has 85 states, 85 states have (on average 140.68235294117648) internal successors, (11958), 85 states have internal predecessors, (11958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:08:40,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:08:40,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 267 [2022-09-20 21:08:40,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand