/usr/bin/java -Xmx16000000000 -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-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:45:11,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:45:11,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:45:11,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:45:11,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:45:11,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:45:11,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:45:11,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:45:11,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:45:11,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:45:11,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:45:11,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:45:11,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:45:11,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:45:11,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:45:11,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:45:11,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:45:11,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:45:11,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:45:11,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:45:11,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:45:11,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:45:11,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:45:11,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:45:11,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:45:11,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:45:11,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:45:11,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:45:11,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:45:11,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:45:11,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:45:11,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:45:11,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:45:11,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:45:11,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:45:11,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:45:11,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:45:11,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:45:11,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:45:11,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:45:11,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:45:11,990 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-After.epf [2022-01-19 14:45:12,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:45:12,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:45:12,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:45:12,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:45:12,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:45:12,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:45:12,018 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:45:12,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:45:12,019 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:45:12,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:45:12,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:45:12,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:45:12,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:45:12,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:45:12,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:45:12,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:45:12,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:45:12,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:45:12,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:45:12,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:45:12,022 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:45:12,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:45:12,022 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:45:12,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:45:12,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:45:12,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:45:12,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:45:12,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:45:12,194 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:45:12,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-01-19 14:45:12,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/559e5916e/aaf3e0902b0c464cba595b798940e8b5/FLAG1a638d500 [2022-01-19 14:45:12,629 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:45:12,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-01-19 14:45:12,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/559e5916e/aaf3e0902b0c464cba595b798940e8b5/FLAG1a638d500 [2022-01-19 14:45:12,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/559e5916e/aaf3e0902b0c464cba595b798940e8b5 [2022-01-19 14:45:12,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:45:12,645 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:45:12,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:45:12,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:45:12,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:45:12,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783b7b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12, skipping insertion in model container [2022-01-19 14:45:12,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:45:12,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:45:12,812 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-nonblocking-cntr.wvr.c[2037,2050] [2022-01-19 14:45:12,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:45:12,822 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:45:12,836 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-nonblocking-cntr.wvr.c[2037,2050] [2022-01-19 14:45:12,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:45:12,846 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:45:12,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12 WrapperNode [2022-01-19 14:45:12,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:45:12,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:45:12,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:45:12,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:45:12,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,874 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-01-19 14:45:12,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:45:12,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:45:12,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:45:12,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:45:12,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:45:12,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:45:12,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:45:12,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:45:12,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (1/1) ... [2022-01-19 14:45:12,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:45:12,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:12,961 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) [2022-01-19 14:45:12,982 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 [2022-01-19 14:45:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:45:12,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:45:12,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:45:12,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:45:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:45:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:45:12,995 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 14:45:13,061 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:45:13,063 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:45:13,210 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:45:13,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:45:13,234 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 14:45:13,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:45:13 BoogieIcfgContainer [2022-01-19 14:45:13,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:45:13,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:45:13,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:45:13,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:45:13,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:45:12" (1/3) ... [2022-01-19 14:45:13,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295138fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:45:13, skipping insertion in model container [2022-01-19 14:45:13,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:45:12" (2/3) ... [2022-01-19 14:45:13,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295138fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:45:13, skipping insertion in model container [2022-01-19 14:45:13,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:45:13" (3/3) ... [2022-01-19 14:45:13,241 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-01-19 14:45:13,245 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:45:13,245 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:45:13,245 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:45:13,265 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,266 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,266 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,266 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,266 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,269 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,269 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,269 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,270 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,270 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,270 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,271 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,272 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,272 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,275 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,276 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:45:13,279 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:45:13,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:45:13,315 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 14:45:13,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:45:13,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-01-19 14:45:13,347 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-01-19 14:45:13,348 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:45:13,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-01-19 14:45:13,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-01-19 14:45:13,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-01-19 14:45:13,367 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2022-01-19 14:45:13,368 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:45:13,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:13,369 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:45:13,369 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1700112450, now seen corresponding path program 1 times [2022-01-19 14:45:13,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:13,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571898018] [2022-01-19 14:45:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:13,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:13,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:13,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571898018] [2022-01-19 14:45:13,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571898018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:45:13,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:45:13,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 14:45:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424329104] [2022-01-19 14:45:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:45:13,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 14:45:13,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 14:45:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 14:45:13,643 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-01-19 14:45:13,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-01-19 14:45:13,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:13,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-01-19 14:45:13,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:13,713 INFO L129 PetriNetUnfolder]: 10/93 cut-off events. [2022-01-19 14:45:13,713 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-01-19 14:45:13,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-01-19 14:45:13,716 INFO L132 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-01-19 14:45:13,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-01-19 14:45:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 14:45:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 14:45:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-01-19 14:45:13,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-01-19 14:45:13,729 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-01-19 14:45:13,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-01-19 14:45:13,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:13,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-01-19 14:45:13,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 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) [2022-01-19 14:45:13,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:13,742 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:13,743 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-01-19 14:45:13,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-01-19 14:45:13,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:45:13,759 INFO L242 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-01-19 14:45:13,760 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-01-19 14:45:13,767 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-01-19 14:45:13,767 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-01-19 14:45:13,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-01-19 14:45:13,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:13,768 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:45:13,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:45:13,768 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-01-19 14:45:13,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202422481] [2022-01-19 14:45:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:13,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:13,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202422481] [2022-01-19 14:45:13,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202422481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:45:13,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:45:13,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:45:13,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024167661] [2022-01-19 14:45:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:45:13,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:45:13,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:45:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:45:13,930 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-01-19 14:45:13,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 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) [2022-01-19 14:45:13,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:13,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-01-19 14:45:13,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:14,038 INFO L129 PetriNetUnfolder]: 64/183 cut-off events. [2022-01-19 14:45:14,038 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-01-19 14:45:14,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-01-19 14:45:14,040 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-01-19 14:45:14,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-01-19 14:45:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:45:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:45:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-01-19 14:45:14,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-01-19 14:45:14,048 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-01-19 14:45:14,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-01-19 14:45:14,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:14,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-01-19 14:45:14,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 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) [2022-01-19 14:45:14,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2022-01-19 14:45:14,051 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2022-01-19 14:45:14,051 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-01-19 14:45:14,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-01-19 14:45:14,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:45:14,058 INFO L242 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-01-19 14:45:14,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-01-19 14:45:14,061 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-01-19 14:45:14,062 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-01-19 14:45:14,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 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) [2022-01-19 14:45:14,062 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:14,062 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:45:14,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:45:14,063 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2022-01-19 14:45:14,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197567151] [2022-01-19 14:45:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:14,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:14,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:14,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197567151] [2022-01-19 14:45:14,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197567151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:45:14,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:45:14,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:45:14,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941186540] [2022-01-19 14:45:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:45:14,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:45:14,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:45:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:45:14,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 14:45:14,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 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) [2022-01-19 14:45:14,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:14,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 14:45:14,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:14,272 INFO L129 PetriNetUnfolder]: 87/283 cut-off events. [2022-01-19 14:45:14,272 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-01-19 14:45:14,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 37 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-01-19 14:45:14,277 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-01-19 14:45:14,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-01-19 14:45:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:45:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:45:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-01-19 14:45:14,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-01-19 14:45:14,281 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-01-19 14:45:14,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-01-19 14:45:14,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:14,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-01-19 14:45:14,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 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) [2022-01-19 14:45:14,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2022-01-19 14:45:14,286 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2022-01-19 14:45:14,286 INFO L186 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-01-19 14:45:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-01-19 14:45:14,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:45:14,290 INFO L242 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-01-19 14:45:14,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-01-19 14:45:14,292 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-01-19 14:45:14,292 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-01-19 14:45:14,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 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) [2022-01-19 14:45:14,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:14,295 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:45:14,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 14:45:14,295 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1801956563, now seen corresponding path program 2 times [2022-01-19 14:45:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:14,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445430740] [2022-01-19 14:45:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:14,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:14,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445430740] [2022-01-19 14:45:14,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445430740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290512580] [2022-01-19 14:45:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:45:14,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:14,427 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) [2022-01-19 14:45:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 14:45:14,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-19 14:45:14,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 14:45:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:45:14,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 14:45:14,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290512580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:45:14,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 14:45:14,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-01-19 14:45:14,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532522705] [2022-01-19 14:45:14,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:45:14,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:45:14,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:45:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-19 14:45:14,954 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-01-19 14:45:14,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 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) [2022-01-19 14:45:14,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:14,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-01-19 14:45:14,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:15,129 INFO L129 PetriNetUnfolder]: 44/166 cut-off events. [2022-01-19 14:45:15,145 INFO L130 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-01-19 14:45:15,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 530 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-01-19 14:45:15,146 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-01-19 14:45:15,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-01-19 14:45:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 14:45:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 14:45:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-01-19 14:45:15,164 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-01-19 14:45:15,164 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-01-19 14:45:15,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-01-19 14:45:15,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:15,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-01-19 14:45:15,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 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) [2022-01-19 14:45:15,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 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) [2022-01-19 14:45:15,168 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 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) [2022-01-19 14:45:15,168 INFO L186 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-01-19 14:45:15,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-01-19 14:45:15,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-01-19 14:45:15,172 INFO L242 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-01-19 14:45:15,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-01-19 14:45:15,173 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-01-19 14:45:15,173 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-01-19 14:45:15,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 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) [2022-01-19 14:45:15,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:15,174 INFO L254 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] [2022-01-19 14:45:15,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:15,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:15,384 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1474269123, now seen corresponding path program 1 times [2022-01-19 14:45:15,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:15,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857938673] [2022-01-19 14:45:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:15,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:15,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:15,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857938673] [2022-01-19 14:45:15,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857938673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:15,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145134282] [2022-01-19 14:45:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:15,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:15,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:15,509 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) [2022-01-19 14:45:15,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 14:45:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 14:45:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:15,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:16,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145134282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:16,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:16,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-01-19 14:45:16,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660847527] [2022-01-19 14:45:16,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:16,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 14:45:16,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:16,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 14:45:16,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-19 14:45:16,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 14:45:16,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 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) [2022-01-19 14:45:16,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:16,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 14:45:16,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:16,365 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2022-01-19 14:45:16,365 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-01-19 14:45:16,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 427 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-01-19 14:45:16,366 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-01-19 14:45:16,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-01-19 14:45:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:45:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:45:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-01-19 14:45:16,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-01-19 14:45:16,367 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-01-19 14:45:16,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-01-19 14:45:16,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:16,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-01-19 14:45:16,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 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) [2022-01-19 14:45:16,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2022-01-19 14:45:16,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2022-01-19 14:45:16,369 INFO L186 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-01-19 14:45:16,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-01-19 14:45:16,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 14:45:16,371 INFO L242 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-01-19 14:45:16,371 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-01-19 14:45:16,372 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-01-19 14:45:16,372 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-01-19 14:45:16,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 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) [2022-01-19 14:45:16,372 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:16,372 INFO L254 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] [2022-01-19 14:45:16,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 14:45:16,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:16,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2022-01-19 14:45:16,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864719923] [2022-01-19 14:45:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:16,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:45:16,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864719923] [2022-01-19 14:45:16,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864719923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415141587] [2022-01-19 14:45:16,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:45:16,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:16,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:16,653 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) [2022-01-19 14:45:16,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 14:45:16,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:45:16,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 14:45:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:45:16,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:45:17,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415141587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:17,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:17,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-01-19 14:45:17,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199368956] [2022-01-19 14:45:17,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:17,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 14:45:17,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 14:45:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 14:45:17,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-01-19 14:45:17,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 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) [2022-01-19 14:45:17,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:17,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-01-19 14:45:17,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:17,164 INFO L129 PetriNetUnfolder]: 109/370 cut-off events. [2022-01-19 14:45:17,164 INFO L130 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2022-01-19 14:45:17,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1754 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2022-01-19 14:45:17,166 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-01-19 14:45:17,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-01-19 14:45:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 14:45:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 14:45:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-01-19 14:45:17,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-01-19 14:45:17,167 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-01-19 14:45:17,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-01-19 14:45:17,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:17,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-01-19 14:45:17,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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) [2022-01-19 14:45:17,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 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) [2022-01-19 14:45:17,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 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) [2022-01-19 14:45:17,170 INFO L186 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-01-19 14:45:17,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-01-19 14:45:17,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 14:45:17,172 INFO L242 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-01-19 14:45:17,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-01-19 14:45:17,173 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-01-19 14:45:17,173 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-01-19 14:45:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 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) [2022-01-19 14:45:17,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:17,173 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:17,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:17,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:17,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2134643199, now seen corresponding path program 3 times [2022-01-19 14:45:17,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361200087] [2022-01-19 14:45:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:17,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:17,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361200087] [2022-01-19 14:45:17,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361200087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728986602] [2022-01-19 14:45:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:45:17,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:17,504 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) [2022-01-19 14:45:17,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 14:45:17,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:45:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:45:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:17,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:17,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728986602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:17,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:17,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-19 14:45:17,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181246638] [2022-01-19 14:45:17,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:17,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:45:17,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:45:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:45:17,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:17,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 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) [2022-01-19 14:45:17,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:17,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:17,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:19,499 INFO L129 PetriNetUnfolder]: 341/932 cut-off events. [2022-01-19 14:45:19,499 INFO L130 PetriNetUnfolder]: For 1529/1529 co-relation queries the response was YES. [2022-01-19 14:45:19,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 932 events. 341/932 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5212 event pairs, 6 based on Foata normal form. 29/961 useless extension candidates. Maximal degree in co-relation 2743. Up to 175 conditions per place. [2022-01-19 14:45:19,505 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 126 selfloop transitions, 180 changer transitions 9/360 dead transitions. [2022-01-19 14:45:19,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 360 transitions, 2526 flow [2022-01-19 14:45:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 14:45:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 14:45:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4205 transitions. [2022-01-19 14:45:19,511 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7431954754330152 [2022-01-19 14:45:19,511 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4205 transitions. [2022-01-19 14:45:19,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4205 transitions. [2022-01-19 14:45:19,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:19,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4205 transitions. [2022-01-19 14:45:19,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 60.94202898550725) internal successors, (4205), 69 states have internal predecessors, (4205), 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) [2022-01-19 14:45:19,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 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) [2022-01-19 14:45:19,526 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 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) [2022-01-19 14:45:19,526 INFO L186 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 69 states and 4205 transitions. [2022-01-19 14:45:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 360 transitions, 2526 flow [2022-01-19 14:45:19,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 360 transitions, 2514 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 14:45:19,547 INFO L242 Difference]: Finished difference. Result has 191 places, 245 transitions, 1966 flow [2022-01-19 14:45:19,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1966, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2022-01-19 14:45:19,548 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 119 predicate places. [2022-01-19 14:45:19,548 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 1966 flow [2022-01-19 14:45:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 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) [2022-01-19 14:45:19,549 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:19,549 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:19,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:19,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:19,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1525353727, now seen corresponding path program 4 times [2022-01-19 14:45:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518319331] [2022-01-19 14:45:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:19,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:19,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518319331] [2022-01-19 14:45:19,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518319331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588352299] [2022-01-19 14:45:19,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:45:19,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:19,896 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) [2022-01-19 14:45:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 14:45:20,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:45:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:20,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 14:45:20,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:20,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:20,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588352299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:20,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:20,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-19 14:45:20,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271932230] [2022-01-19 14:45:20,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:20,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 14:45:20,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 14:45:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-19 14:45:20,703 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:20,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 1966 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 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) [2022-01-19 14:45:20,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:20,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:20,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:21,520 INFO L129 PetriNetUnfolder]: 521/1415 cut-off events. [2022-01-19 14:45:21,521 INFO L130 PetriNetUnfolder]: For 34642/34642 co-relation queries the response was YES. [2022-01-19 14:45:21,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8020 conditions, 1415 events. 521/1415 cut-off events. For 34642/34642 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9192 event pairs, 4 based on Foata normal form. 31/1445 useless extension candidates. Maximal degree in co-relation 7971. Up to 290 conditions per place. [2022-01-19 14:45:21,536 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 157 selfloop transitions, 287 changer transitions 7/496 dead transitions. [2022-01-19 14:45:21,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 496 transitions, 5587 flow [2022-01-19 14:45:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 14:45:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 14:45:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-01-19 14:45:21,540 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-01-19 14:45:21,540 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-01-19 14:45:21,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-01-19 14:45:21,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:21,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-01-19 14:45:21,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 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) [2022-01-19 14:45:21,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 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) [2022-01-19 14:45:21,547 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 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) [2022-01-19 14:45:21,548 INFO L186 Difference]: Start difference. First operand has 191 places, 245 transitions, 1966 flow. Second operand 39 states and 2387 transitions. [2022-01-19 14:45:21,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 496 transitions, 5587 flow [2022-01-19 14:45:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 496 transitions, 5042 flow, removed 195 selfloop flow, removed 5 redundant places. [2022-01-19 14:45:21,603 INFO L242 Difference]: Finished difference. Result has 237 places, 404 transitions, 4532 flow [2022-01-19 14:45:21,603 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4532, PETRI_PLACES=237, PETRI_TRANSITIONS=404} [2022-01-19 14:45:21,604 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2022-01-19 14:45:21,604 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 404 transitions, 4532 flow [2022-01-19 14:45:21,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 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) [2022-01-19 14:45:21,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:21,604 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:21,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:21,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:21,823 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash -360678591, now seen corresponding path program 5 times [2022-01-19 14:45:21,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:21,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860553337] [2022-01-19 14:45:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:21,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:21,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860553337] [2022-01-19 14:45:21,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860553337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425301276] [2022-01-19 14:45:21,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:45:21,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:21,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:21,939 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) [2022-01-19 14:45:21,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 14:45:21,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 14:45:21,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:45:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:22,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:22,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425301276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:22,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:22,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-19 14:45:22,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912590674] [2022-01-19 14:45:22,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:22,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 14:45:22,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:22,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 14:45:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-19 14:45:22,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:22,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 404 transitions, 4532 flow. Second operand has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 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) [2022-01-19 14:45:22,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:22,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:22,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:23,711 INFO L129 PetriNetUnfolder]: 708/2090 cut-off events. [2022-01-19 14:45:23,711 INFO L130 PetriNetUnfolder]: For 52169/52169 co-relation queries the response was YES. [2022-01-19 14:45:23,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 2090 events. 708/2090 cut-off events. For 52169/52169 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15982 event pairs, 13 based on Foata normal form. 31/2113 useless extension candidates. Maximal degree in co-relation 12254. Up to 360 conditions per place. [2022-01-19 14:45:23,736 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 233 selfloop transitions, 439 changer transitions 19/736 dead transitions. [2022-01-19 14:45:23,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 736 transitions, 9640 flow [2022-01-19 14:45:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 14:45:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 14:45:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4073 transitions. [2022-01-19 14:45:23,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.741354204586822 [2022-01-19 14:45:23,741 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4073 transitions. [2022-01-19 14:45:23,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4073 transitions. [2022-01-19 14:45:23,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:23,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4073 transitions. [2022-01-19 14:45:23,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 60.791044776119406) internal successors, (4073), 67 states have internal predecessors, (4073), 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) [2022-01-19 14:45:23,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 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) [2022-01-19 14:45:23,756 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 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) [2022-01-19 14:45:23,756 INFO L186 Difference]: Start difference. First operand has 237 places, 404 transitions, 4532 flow. Second operand 67 states and 4073 transitions. [2022-01-19 14:45:23,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 736 transitions, 9640 flow [2022-01-19 14:45:23,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 736 transitions, 8645 flow, removed 472 selfloop flow, removed 9 redundant places. [2022-01-19 14:45:23,886 INFO L242 Difference]: Finished difference. Result has 317 places, 592 transitions, 7602 flow [2022-01-19 14:45:23,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7602, PETRI_PLACES=317, PETRI_TRANSITIONS=592} [2022-01-19 14:45:23,887 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 245 predicate places. [2022-01-19 14:45:23,887 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 592 transitions, 7602 flow [2022-01-19 14:45:23,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 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) [2022-01-19 14:45:23,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:23,888 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:23,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:24,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:24,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 545089743, now seen corresponding path program 6 times [2022-01-19 14:45:24,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:24,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085945929] [2022-01-19 14:45:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:24,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:24,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085945929] [2022-01-19 14:45:24,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085945929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99267686] [2022-01-19 14:45:24,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:45:24,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:24,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:24,204 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) [2022-01-19 14:45:24,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 14:45:24,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:45:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:24,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99267686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:24,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-19 14:45:24,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677672086] [2022-01-19 14:45:24,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:45:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:45:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:45:24,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:24,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 592 transitions, 7602 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 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) [2022-01-19 14:45:24,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:24,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:24,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:25,721 INFO L129 PetriNetUnfolder]: 840/2479 cut-off events. [2022-01-19 14:45:25,721 INFO L130 PetriNetUnfolder]: For 42171/42171 co-relation queries the response was YES. [2022-01-19 14:45:25,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14619 conditions, 2479 events. 840/2479 cut-off events. For 42171/42171 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19867 event pairs, 14 based on Foata normal form. 1/2476 useless extension candidates. Maximal degree in co-relation 14537. Up to 440 conditions per place. [2022-01-19 14:45:25,760 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 321 selfloop transitions, 521 changer transitions 17/904 dead transitions. [2022-01-19 14:45:25,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 904 transitions, 13698 flow [2022-01-19 14:45:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 14:45:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 14:45:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-01-19 14:45:25,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-01-19 14:45:25,764 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-01-19 14:45:25,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-01-19 14:45:25,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:25,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-01-19 14:45:25,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 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) [2022-01-19 14:45:25,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 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) [2022-01-19 14:45:25,781 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 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) [2022-01-19 14:45:25,781 INFO L186 Difference]: Start difference. First operand has 317 places, 592 transitions, 7602 flow. Second operand 41 states and 2515 transitions. [2022-01-19 14:45:25,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 904 transitions, 13698 flow [2022-01-19 14:45:26,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 904 transitions, 13001 flow, removed 213 selfloop flow, removed 28 redundant places. [2022-01-19 14:45:26,064 INFO L242 Difference]: Finished difference. Result has 337 places, 752 transitions, 10690 flow [2022-01-19 14:45:26,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10690, PETRI_PLACES=337, PETRI_TRANSITIONS=752} [2022-01-19 14:45:26,066 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 265 predicate places. [2022-01-19 14:45:26,066 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 752 transitions, 10690 flow [2022-01-19 14:45:26,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 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) [2022-01-19 14:45:26,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:26,067 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:26,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:26,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:26,282 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1852758055, now seen corresponding path program 7 times [2022-01-19 14:45:26,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:26,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279456515] [2022-01-19 14:45:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:26,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:26,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279456515] [2022-01-19 14:45:26,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279456515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516956411] [2022-01-19 14:45:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:45:26,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:26,368 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) [2022-01-19 14:45:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 14:45:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:26,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:26,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:26,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516956411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:26,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:26,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:45:26,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395849280] [2022-01-19 14:45:26,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:26,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:45:26,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:45:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:45:26,825 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:26,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 752 transitions, 10690 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:45:26,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:26,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:26,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:27,531 INFO L129 PetriNetUnfolder]: 845/2466 cut-off events. [2022-01-19 14:45:27,531 INFO L130 PetriNetUnfolder]: For 42610/42610 co-relation queries the response was YES. [2022-01-19 14:45:27,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15250 conditions, 2466 events. 845/2466 cut-off events. For 42610/42610 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19553 event pairs, 67 based on Foata normal form. 1/2429 useless extension candidates. Maximal degree in co-relation 15164. Up to 440 conditions per place. [2022-01-19 14:45:27,568 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 334 selfloop transitions, 444 changer transitions 7/830 dead transitions. [2022-01-19 14:45:27,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 830 transitions, 13357 flow [2022-01-19 14:45:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-19 14:45:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-01-19 14:45:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-01-19 14:45:27,575 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-01-19 14:45:27,575 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-01-19 14:45:27,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-01-19 14:45:27,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:27,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-01-19 14:45:27,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 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) [2022-01-19 14:45:27,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 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) [2022-01-19 14:45:27,584 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 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) [2022-01-19 14:45:27,584 INFO L186 Difference]: Start difference. First operand has 337 places, 752 transitions, 10690 flow. Second operand 21 states and 1296 transitions. [2022-01-19 14:45:27,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 830 transitions, 13357 flow [2022-01-19 14:45:27,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 830 transitions, 13013 flow, removed 61 selfloop flow, removed 17 redundant places. [2022-01-19 14:45:27,857 INFO L242 Difference]: Finished difference. Result has 341 places, 778 transitions, 11704 flow [2022-01-19 14:45:27,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=10399, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11704, PETRI_PLACES=341, PETRI_TRANSITIONS=778} [2022-01-19 14:45:27,859 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 269 predicate places. [2022-01-19 14:45:27,860 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 778 transitions, 11704 flow [2022-01-19 14:45:27,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:45:27,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:27,860 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:27,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:28,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-19 14:45:28,062 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash 951866337, now seen corresponding path program 8 times [2022-01-19 14:45:28,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:28,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307268158] [2022-01-19 14:45:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:28,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:28,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:28,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307268158] [2022-01-19 14:45:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307268158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:28,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140615430] [2022-01-19 14:45:28,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:45:28,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:28,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:45:28,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 14:45:28,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:45:28,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:28,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:28,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140615430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:28,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:28,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 14:45:28,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341356291] [2022-01-19 14:45:28,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 14:45:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 14:45:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-19 14:45:28,623 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:28,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 778 transitions, 11704 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:28,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:28,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:28,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:30,273 INFO L129 PetriNetUnfolder]: 1271/3799 cut-off events. [2022-01-19 14:45:30,274 INFO L130 PetriNetUnfolder]: For 74367/74367 co-relation queries the response was YES. [2022-01-19 14:45:30,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24503 conditions, 3799 events. 1271/3799 cut-off events. For 74367/74367 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33369 event pairs, 40 based on Foata normal form. 9/3789 useless extension candidates. Maximal degree in co-relation 24417. Up to 627 conditions per place. [2022-01-19 14:45:30,317 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 442 selfloop transitions, 810 changer transitions 14/1311 dead transitions. [2022-01-19 14:45:30,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1311 transitions, 22568 flow [2022-01-19 14:45:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 14:45:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 14:45:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2719 transitions. [2022-01-19 14:45:30,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7536031042128604 [2022-01-19 14:45:30,321 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2719 transitions. [2022-01-19 14:45:30,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2719 transitions. [2022-01-19 14:45:30,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:30,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2719 transitions. [2022-01-19 14:45:30,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.79545454545455) internal successors, (2719), 44 states have internal predecessors, (2719), 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) [2022-01-19 14:45:30,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 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) [2022-01-19 14:45:30,329 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 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) [2022-01-19 14:45:30,329 INFO L186 Difference]: Start difference. First operand has 341 places, 778 transitions, 11704 flow. Second operand 44 states and 2719 transitions. [2022-01-19 14:45:30,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1311 transitions, 22568 flow [2022-01-19 14:45:30,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1311 transitions, 21718 flow, removed 48 selfloop flow, removed 8 redundant places. [2022-01-19 14:45:30,790 INFO L242 Difference]: Finished difference. Result has 394 places, 1095 transitions, 19168 flow [2022-01-19 14:45:30,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19168, PETRI_PLACES=394, PETRI_TRANSITIONS=1095} [2022-01-19 14:45:30,809 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2022-01-19 14:45:30,809 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1095 transitions, 19168 flow [2022-01-19 14:45:30,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:30,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:30,810 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:30,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:31,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:31,031 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1520867889, now seen corresponding path program 9 times [2022-01-19 14:45:31,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:31,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771819832] [2022-01-19 14:45:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:31,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:31,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771819832] [2022-01-19 14:45:31,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771819832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:31,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355618889] [2022-01-19 14:45:31,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:45:31,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:31,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:45:31,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 14:45:31,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 14:45:31,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:31,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:31,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355618889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:31,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:31,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 14:45:31,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186270686] [2022-01-19 14:45:31,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:31,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 14:45:31,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 14:45:31,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-19 14:45:31,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:31,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1095 transitions, 19168 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:31,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:31,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:31,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:33,723 INFO L129 PetriNetUnfolder]: 1238/3666 cut-off events. [2022-01-19 14:45:33,723 INFO L130 PetriNetUnfolder]: For 104324/104324 co-relation queries the response was YES. [2022-01-19 14:45:33,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25742 conditions, 3666 events. 1238/3666 cut-off events. For 104324/104324 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31973 event pairs, 43 based on Foata normal form. 43/3692 useless extension candidates. Maximal degree in co-relation 25637. Up to 653 conditions per place. [2022-01-19 14:45:33,769 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 296 selfloop transitions, 970 changer transitions 3/1314 dead transitions. [2022-01-19 14:45:33,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1314 transitions, 24260 flow [2022-01-19 14:45:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 14:45:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 14:45:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3835 transitions. [2022-01-19 14:45:33,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423538521099496 [2022-01-19 14:45:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3835 transitions. [2022-01-19 14:45:33,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3835 transitions. [2022-01-19 14:45:33,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:33,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3835 transitions. [2022-01-19 14:45:33,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.87301587301587) internal successors, (3835), 63 states have internal predecessors, (3835), 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) [2022-01-19 14:45:33,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 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) [2022-01-19 14:45:33,780 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 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) [2022-01-19 14:45:33,780 INFO L186 Difference]: Start difference. First operand has 394 places, 1095 transitions, 19168 flow. Second operand 63 states and 3835 transitions. [2022-01-19 14:45:33,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1314 transitions, 24260 flow [2022-01-19 14:45:34,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1314 transitions, 23605 flow, removed 111 selfloop flow, removed 20 redundant places. [2022-01-19 14:45:34,326 INFO L242 Difference]: Finished difference. Result has 442 places, 1183 transitions, 22741 flow [2022-01-19 14:45:34,327 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17960, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=22741, PETRI_PLACES=442, PETRI_TRANSITIONS=1183} [2022-01-19 14:45:34,328 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 370 predicate places. [2022-01-19 14:45:34,328 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 1183 transitions, 22741 flow [2022-01-19 14:45:34,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:34,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:34,328 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:34,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-19 14:45:34,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 14:45:34,545 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 125780809, now seen corresponding path program 10 times [2022-01-19 14:45:34,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:34,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293913620] [2022-01-19 14:45:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:34,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:34,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:34,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293913620] [2022-01-19 14:45:34,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293913620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641048671] [2022-01-19 14:45:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:45:34,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:34,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:45:34,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 14:45:34,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:45:34,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:34,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:34,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:34,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641048671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:35,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:35,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:45:35,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306547237] [2022-01-19 14:45:35,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:35,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:45:35,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:45:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:45:35,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:35,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1183 transitions, 22741 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:45:35,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:35,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:35,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:36,538 INFO L129 PetriNetUnfolder]: 1261/3731 cut-off events. [2022-01-19 14:45:36,538 INFO L130 PetriNetUnfolder]: For 100950/100950 co-relation queries the response was YES. [2022-01-19 14:45:36,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28542 conditions, 3731 events. 1261/3731 cut-off events. For 100950/100950 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32766 event pairs, 42 based on Foata normal form. 1/3722 useless extension candidates. Maximal degree in co-relation 28430. Up to 1723 conditions per place. [2022-01-19 14:45:36,591 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 971 selfloop transitions, 229 changer transitions 8/1253 dead transitions. [2022-01-19 14:45:36,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1253 transitions, 26303 flow [2022-01-19 14:45:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 14:45:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 14:45:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1104 transitions. [2022-01-19 14:45:36,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479674796747967 [2022-01-19 14:45:36,593 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1104 transitions. [2022-01-19 14:45:36,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1104 transitions. [2022-01-19 14:45:36,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:36,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1104 transitions. [2022-01-19 14:45:36,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.333333333333336) internal successors, (1104), 18 states have internal predecessors, (1104), 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) [2022-01-19 14:45:36,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 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) [2022-01-19 14:45:36,598 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 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) [2022-01-19 14:45:36,598 INFO L186 Difference]: Start difference. First operand has 442 places, 1183 transitions, 22741 flow. Second operand 18 states and 1104 transitions. [2022-01-19 14:45:36,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1253 transitions, 26303 flow [2022-01-19 14:45:37,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1253 transitions, 25567 flow, removed 74 selfloop flow, removed 37 redundant places. [2022-01-19 14:45:37,311 INFO L242 Difference]: Finished difference. Result has 427 places, 1215 transitions, 23399 flow [2022-01-19 14:45:37,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=22038, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23399, PETRI_PLACES=427, PETRI_TRANSITIONS=1215} [2022-01-19 14:45:37,312 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 355 predicate places. [2022-01-19 14:45:37,312 INFO L470 AbstractCegarLoop]: Abstraction has has 427 places, 1215 transitions, 23399 flow [2022-01-19 14:45:37,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:45:37,327 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:37,327 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:37,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:37,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 14:45:37,542 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1670132595, now seen corresponding path program 11 times [2022-01-19 14:45:37,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:37,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413761345] [2022-01-19 14:45:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:37,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:37,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:37,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413761345] [2022-01-19 14:45:37,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413761345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:37,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725808828] [2022-01-19 14:45:37,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:45:37,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:37,636 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:45:37,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 14:45:37,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 14:45:37,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:37,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:45:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:38,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:38,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725808828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:38,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:38,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-19 14:45:38,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498264635] [2022-01-19 14:45:38,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:38,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:45:38,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:45:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:45:38,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:38,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1215 transitions, 23399 flow. Second operand has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 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) [2022-01-19 14:45:38,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:38,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:38,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:41,482 INFO L129 PetriNetUnfolder]: 1964/5682 cut-off events. [2022-01-19 14:45:41,482 INFO L130 PetriNetUnfolder]: For 162863/162863 co-relation queries the response was YES. [2022-01-19 14:45:41,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44476 conditions, 5682 events. 1964/5682 cut-off events. For 162863/162863 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 54407 event pairs, 55 based on Foata normal form. 4/5679 useless extension candidates. Maximal degree in co-relation 44360. Up to 1701 conditions per place. [2022-01-19 14:45:41,606 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 890 selfloop transitions, 1200 changer transitions 16/2151 dead transitions. [2022-01-19 14:45:41,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2151 transitions, 46091 flow [2022-01-19 14:45:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 14:45:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 14:45:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3579 transitions. [2022-01-19 14:45:41,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7397684993799091 [2022-01-19 14:45:41,609 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3579 transitions. [2022-01-19 14:45:41,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3579 transitions. [2022-01-19 14:45:41,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:41,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3579 transitions. [2022-01-19 14:45:41,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 60.66101694915254) internal successors, (3579), 59 states have internal predecessors, (3579), 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) [2022-01-19 14:45:41,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 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) [2022-01-19 14:45:41,619 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 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) [2022-01-19 14:45:41,620 INFO L186 Difference]: Start difference. First operand has 427 places, 1215 transitions, 23399 flow. Second operand 59 states and 3579 transitions. [2022-01-19 14:45:41,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2151 transitions, 46091 flow [2022-01-19 14:45:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 2151 transitions, 45457 flow, removed 119 selfloop flow, removed 9 redundant places. [2022-01-19 14:45:43,187 INFO L242 Difference]: Finished difference. Result has 497 places, 1947 transitions, 43725 flow [2022-01-19 14:45:43,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=23064, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=43725, PETRI_PLACES=497, PETRI_TRANSITIONS=1947} [2022-01-19 14:45:43,199 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 425 predicate places. [2022-01-19 14:45:43,199 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 1947 transitions, 43725 flow [2022-01-19 14:45:43,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 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) [2022-01-19 14:45:43,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:43,200 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:43,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:43,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 14:45:43,416 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash -534521583, now seen corresponding path program 12 times [2022-01-19 14:45:43,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371249647] [2022-01-19 14:45:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:43,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:43,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:43,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371249647] [2022-01-19 14:45:43,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371249647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:43,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421018371] [2022-01-19 14:45:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:45:43,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:43,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:45:43,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 14:45:43,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:45:43,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:45:43,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:43,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:43,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:44,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421018371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:44,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:44,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:45:44,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090958846] [2022-01-19 14:45:44,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:44,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:45:44,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:45:44,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:45:44,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:44,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1947 transitions, 43725 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:45:44,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:44,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:44,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:45:50,353 INFO L129 PetriNetUnfolder]: 3075/9213 cut-off events. [2022-01-19 14:45:50,353 INFO L130 PetriNetUnfolder]: For 387993/387993 co-relation queries the response was YES. [2022-01-19 14:45:50,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81817 conditions, 9213 events. 3075/9213 cut-off events. For 387993/387993 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 98488 event pairs, 161 based on Foata normal form. 10/9195 useless extension candidates. Maximal degree in co-relation 81681. Up to 2630 conditions per place. [2022-01-19 14:45:50,589 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1892 selfloop transitions, 1233 changer transitions 12/3182 dead transitions. [2022-01-19 14:45:50,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 3182 transitions, 78357 flow [2022-01-19 14:45:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 14:45:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 14:45:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3735 transitions. [2022-01-19 14:45:50,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7467013194722111 [2022-01-19 14:45:50,593 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3735 transitions. [2022-01-19 14:45:50,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3735 transitions. [2022-01-19 14:45:50,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:45:50,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3735 transitions. [2022-01-19 14:45:50,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.22950819672131) internal successors, (3735), 61 states have internal predecessors, (3735), 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) [2022-01-19 14:45:50,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 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) [2022-01-19 14:45:50,617 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 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) [2022-01-19 14:45:50,618 INFO L186 Difference]: Start difference. First operand has 497 places, 1947 transitions, 43725 flow. Second operand 61 states and 3735 transitions. [2022-01-19 14:45:50,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 3182 transitions, 78357 flow [2022-01-19 14:45:55,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 3182 transitions, 76856 flow, removed 283 selfloop flow, removed 15 redundant places. [2022-01-19 14:45:55,165 INFO L242 Difference]: Finished difference. Result has 569 places, 2811 transitions, 68554 flow [2022-01-19 14:45:55,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=42793, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=68554, PETRI_PLACES=569, PETRI_TRANSITIONS=2811} [2022-01-19 14:45:55,167 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 497 predicate places. [2022-01-19 14:45:55,167 INFO L470 AbstractCegarLoop]: Abstraction has has 569 places, 2811 transitions, 68554 flow [2022-01-19 14:45:55,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:45:55,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:45:55,167 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:45:55,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 14:45:55,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 14:45:55,398 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:45:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:45:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -87816547, now seen corresponding path program 13 times [2022-01-19 14:45:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:45:55,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660660192] [2022-01-19 14:45:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:45:55,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:45:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:55,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:45:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660660192] [2022-01-19 14:45:55,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660660192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:45:55,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993802138] [2022-01-19 14:45:55,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:45:55,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:45:55,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:45:55,480 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:45:55,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 14:45:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:45:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:45:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:45:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:55,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:45:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:45:55,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993802138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:45:55,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:45:55,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 14:45:55,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899962534] [2022-01-19 14:45:55,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:45:55,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 14:45:55,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:45:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 14:45:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-19 14:45:55,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:45:55,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 2811 transitions, 68554 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:45:55,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:45:55,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:45:55,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:05,285 INFO L129 PetriNetUnfolder]: 3996/12303 cut-off events. [2022-01-19 14:46:05,286 INFO L130 PetriNetUnfolder]: For 803620/803620 co-relation queries the response was YES. [2022-01-19 14:46:05,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120373 conditions, 12303 events. 3996/12303 cut-off events. For 803620/803620 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 139657 event pairs, 207 based on Foata normal form. 16/12270 useless extension candidates. Maximal degree in co-relation 120210. Up to 2477 conditions per place. [2022-01-19 14:46:05,482 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1820 selfloop transitions, 1820 changer transitions 12/3697 dead transitions. [2022-01-19 14:46:05,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 3697 transitions, 96925 flow [2022-01-19 14:46:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-19 14:46:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-19 14:46:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2793 transitions. [2022-01-19 14:46:05,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7569105691056911 [2022-01-19 14:46:05,484 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2793 transitions. [2022-01-19 14:46:05,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2793 transitions. [2022-01-19 14:46:05,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:05,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2793 transitions. [2022-01-19 14:46:05,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.06666666666667) internal successors, (2793), 45 states have internal predecessors, (2793), 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) [2022-01-19 14:46:05,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 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) [2022-01-19 14:46:05,489 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 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) [2022-01-19 14:46:05,489 INFO L186 Difference]: Start difference. First operand has 569 places, 2811 transitions, 68554 flow. Second operand 45 states and 2793 transitions. [2022-01-19 14:46:05,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 3697 transitions, 96925 flow [2022-01-19 14:46:16,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 3697 transitions, 95547 flow, removed 578 selfloop flow, removed 16 redundant places. [2022-01-19 14:46:16,472 INFO L242 Difference]: Finished difference. Result has 619 places, 3408 transitions, 89268 flow [2022-01-19 14:46:16,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=67494, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=89268, PETRI_PLACES=619, PETRI_TRANSITIONS=3408} [2022-01-19 14:46:16,474 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 547 predicate places. [2022-01-19 14:46:16,474 INFO L470 AbstractCegarLoop]: Abstraction has has 619 places, 3408 transitions, 89268 flow [2022-01-19 14:46:16,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:46:16,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:16,475 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:46:16,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 14:46:16,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:16,693 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash 60354813, now seen corresponding path program 14 times [2022-01-19 14:46:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617672522] [2022-01-19 14:46:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:16,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:46:16,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:16,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617672522] [2022-01-19 14:46:16,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617672522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:16,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629860240] [2022-01-19 14:46:16,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:46:16,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:16,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:46:16,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 14:46:16,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:46:16,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:46:16,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:46:16,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:46:17,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629860240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:17,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:17,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 14:46:17,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131856355] [2022-01-19 14:46:17,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:17,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 14:46:17,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 14:46:17,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-19 14:46:17,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:46:17,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 3408 transitions, 89268 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:46:17,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:17,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:46:17,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:30,687 INFO L129 PetriNetUnfolder]: 3998/12378 cut-off events. [2022-01-19 14:46:30,688 INFO L130 PetriNetUnfolder]: For 1010473/1010473 co-relation queries the response was YES. [2022-01-19 14:46:30,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127909 conditions, 12378 events. 3998/12378 cut-off events. For 1010473/1010473 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 140643 event pairs, 239 based on Foata normal form. 79/12418 useless extension candidates. Maximal degree in co-relation 127724. Up to 2342 conditions per place. [2022-01-19 14:46:30,983 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1011 selfloop transitions, 2651 changer transitions 6/3713 dead transitions. [2022-01-19 14:46:30,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 3713 transitions, 103012 flow [2022-01-19 14:46:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 14:46:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 14:46:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3626 transitions. [2022-01-19 14:46:30,986 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7494832575444399 [2022-01-19 14:46:30,986 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3626 transitions. [2022-01-19 14:46:30,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3626 transitions. [2022-01-19 14:46:30,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:30,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3626 transitions. [2022-01-19 14:46:30,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.45762711864407) internal successors, (3626), 59 states have internal predecessors, (3626), 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) [2022-01-19 14:46:30,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 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) [2022-01-19 14:46:30,993 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 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) [2022-01-19 14:46:30,993 INFO L186 Difference]: Start difference. First operand has 619 places, 3408 transitions, 89268 flow. Second operand 59 states and 3626 transitions. [2022-01-19 14:46:30,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 3713 transitions, 103012 flow [2022-01-19 14:46:42,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 3713 transitions, 102112 flow, removed 355 selfloop flow, removed 18 redundant places. [2022-01-19 14:46:42,548 INFO L242 Difference]: Finished difference. Result has 659 places, 3518 transitions, 98869 flow [2022-01-19 14:46:42,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=87253, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=98869, PETRI_PLACES=659, PETRI_TRANSITIONS=3518} [2022-01-19 14:46:42,550 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 587 predicate places. [2022-01-19 14:46:42,550 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 3518 transitions, 98869 flow [2022-01-19 14:46:42,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:46:42,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:46:42,551 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:46:42,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 14:46:42,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 14:46:42,755 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:46:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:46:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash -490468571, now seen corresponding path program 15 times [2022-01-19 14:46:42,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:46:42,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424763546] [2022-01-19 14:46:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:46:42,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:46:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:46:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:46:42,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:46:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424763546] [2022-01-19 14:46:42,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424763546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:46:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146404752] [2022-01-19 14:46:42,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:46:42,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:46:42,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:46:42,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:46:42,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 14:46:42,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:46:42,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:46:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:46:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:46:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:46:43,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:46:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:46:43,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146404752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:46:43,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:46:43,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-19 14:46:43,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504579502] [2022-01-19 14:46:43,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:46:43,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 14:46:43,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:46:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 14:46:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-19 14:46:43,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:46:43,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 3518 transitions, 98869 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 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) [2022-01-19 14:46:43,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:46:43,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:46:43,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:46:58,541 INFO L129 PetriNetUnfolder]: 4261/12974 cut-off events. [2022-01-19 14:46:58,542 INFO L130 PetriNetUnfolder]: For 1168799/1168799 co-relation queries the response was YES. [2022-01-19 14:46:58,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141342 conditions, 12974 events. 4261/12974 cut-off events. For 1168799/1168799 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 147393 event pairs, 207 based on Foata normal form. 120/13076 useless extension candidates. Maximal degree in co-relation 141153. Up to 4339 conditions per place. [2022-01-19 14:46:58,884 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1435 selfloop transitions, 2489 changer transitions 16/3985 dead transitions. [2022-01-19 14:46:58,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 3985 transitions, 118073 flow [2022-01-19 14:46:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 14:46:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 14:46:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2022-01-19 14:46:58,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2022-01-19 14:46:58,886 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2022-01-19 14:46:58,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2022-01-19 14:46:58,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:46:58,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2022-01-19 14:46:58,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 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) [2022-01-19 14:46:58,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 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) [2022-01-19 14:46:58,966 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 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) [2022-01-19 14:46:58,966 INFO L186 Difference]: Start difference. First operand has 659 places, 3518 transitions, 98869 flow. Second operand 40 states and 2495 transitions. [2022-01-19 14:46:58,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 3985 transitions, 118073 flow [2022-01-19 14:47:10,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 3985 transitions, 114861 flow, removed 158 selfloop flow, removed 30 redundant places. [2022-01-19 14:47:10,482 INFO L242 Difference]: Finished difference. Result has 697 places, 3747 transitions, 112241 flow [2022-01-19 14:47:10,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=95895, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=112241, PETRI_PLACES=697, PETRI_TRANSITIONS=3747} [2022-01-19 14:47:10,485 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 625 predicate places. [2022-01-19 14:47:10,485 INFO L470 AbstractCegarLoop]: Abstraction has has 697 places, 3747 transitions, 112241 flow [2022-01-19 14:47:10,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 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) [2022-01-19 14:47:10,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:10,485 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:47:10,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-19 14:47:10,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:10,692 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1205573759, now seen corresponding path program 16 times [2022-01-19 14:47:10,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:10,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107645572] [2022-01-19 14:47:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:10,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:47:10,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107645572] [2022-01-19 14:47:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107645572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900199379] [2022-01-19 14:47:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:47:10,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:10,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:47:10,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 14:47:10,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:47:10,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:47:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:47:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:47:11,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:47:11,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900199379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:11,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:11,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:47:11,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784364556] [2022-01-19 14:47:11,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:11,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:47:11,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:11,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:47:11,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:47:11,183 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:47:11,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 3747 transitions, 112241 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:47:11,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:11,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:47:11,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:47:26,646 INFO L129 PetriNetUnfolder]: 4542/14054 cut-off events. [2022-01-19 14:47:26,646 INFO L130 PetriNetUnfolder]: For 1608428/1608428 co-relation queries the response was YES. [2022-01-19 14:47:26,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166589 conditions, 14054 events. 4542/14054 cut-off events. For 1608428/1608428 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 162332 event pairs, 275 based on Foata normal form. 7/14004 useless extension candidates. Maximal degree in co-relation 166375. Up to 3332 conditions per place. [2022-01-19 14:47:26,931 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2292 selfloop transitions, 1831 changer transitions 9/4177 dead transitions. [2022-01-19 14:47:26,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 4177 transitions, 132427 flow [2022-01-19 14:47:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 14:47:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 14:47:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2707 transitions. [2022-01-19 14:47:26,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7502771618625277 [2022-01-19 14:47:26,937 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2707 transitions. [2022-01-19 14:47:26,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2707 transitions. [2022-01-19 14:47:26,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:47:26,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2707 transitions. [2022-01-19 14:47:26,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.52272727272727) internal successors, (2707), 44 states have internal predecessors, (2707), 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) [2022-01-19 14:47:26,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 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) [2022-01-19 14:47:26,941 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 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) [2022-01-19 14:47:26,941 INFO L186 Difference]: Start difference. First operand has 697 places, 3747 transitions, 112241 flow. Second operand 44 states and 2707 transitions. [2022-01-19 14:47:26,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 4177 transitions, 132427 flow [2022-01-19 14:47:40,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 4177 transitions, 128120 flow, removed 299 selfloop flow, removed 8 redundant places. [2022-01-19 14:47:40,146 INFO L242 Difference]: Finished difference. Result has 747 places, 3962 transitions, 120799 flow [2022-01-19 14:47:40,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=108161, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=120799, PETRI_PLACES=747, PETRI_TRANSITIONS=3962} [2022-01-19 14:47:40,149 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 675 predicate places. [2022-01-19 14:47:40,149 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 3962 transitions, 120799 flow [2022-01-19 14:47:40,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:47:40,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:47:40,150 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:47:40,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-19 14:47:40,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:40,363 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:47:40,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:47:40,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1266352041, now seen corresponding path program 17 times [2022-01-19 14:47:40,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:47:40,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659287976] [2022-01-19 14:47:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:47:40,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:47:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:47:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:47:40,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:47:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659287976] [2022-01-19 14:47:40,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659287976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:47:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465264495] [2022-01-19 14:47:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:47:40,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:47:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:47:40,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:47:40,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 14:47:40,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:47:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:47:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:47:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:47:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:47:40,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:47:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:47:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465264495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:47:40,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:47:40,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-19 14:47:40,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112974734] [2022-01-19 14:47:40,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:47:40,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:47:40,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:47:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:47:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:47:40,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:47:40,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 3962 transitions, 120799 flow. Second operand has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 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) [2022-01-19 14:47:40,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:47:40,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:47:40,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:47:56,586 INFO L129 PetriNetUnfolder]: 5228/15175 cut-off events. [2022-01-19 14:47:56,586 INFO L130 PetriNetUnfolder]: For 1796888/1796888 co-relation queries the response was YES. [2022-01-19 14:47:56,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185731 conditions, 15175 events. 5228/15175 cut-off events. For 1796888/1796888 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 171593 event pairs, 256 based on Foata normal form. 1/15138 useless extension candidates. Maximal degree in co-relation 185508. Up to 5468 conditions per place. [2022-01-19 14:47:56,908 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2284 selfloop transitions, 2489 changer transitions 5/4823 dead transitions. [2022-01-19 14:47:56,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 4823 transitions, 156790 flow [2022-01-19 14:47:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 14:47:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 14:47:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1406 transitions. [2022-01-19 14:47:56,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454931071049841 [2022-01-19 14:47:56,909 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1406 transitions. [2022-01-19 14:47:56,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1406 transitions. [2022-01-19 14:47:56,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:47:56,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1406 transitions. [2022-01-19 14:47:56,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.130434782608695) internal successors, (1406), 23 states have internal predecessors, (1406), 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) [2022-01-19 14:47:56,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 82.0) internal successors, (1968), 24 states have internal predecessors, (1968), 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) [2022-01-19 14:47:56,912 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 82.0) internal successors, (1968), 24 states have internal predecessors, (1968), 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) [2022-01-19 14:47:56,912 INFO L186 Difference]: Start difference. First operand has 747 places, 3962 transitions, 120799 flow. Second operand 23 states and 1406 transitions. [2022-01-19 14:47:56,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 4823 transitions, 156790 flow [2022-01-19 14:48:14,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 4823 transitions, 156056 flow, removed 246 selfloop flow, removed 15 redundant places. [2022-01-19 14:48:14,160 INFO L242 Difference]: Finished difference. Result has 759 places, 4553 transitions, 150525 flow [2022-01-19 14:48:14,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=120119, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=150525, PETRI_PLACES=759, PETRI_TRANSITIONS=4553} [2022-01-19 14:48:14,163 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 687 predicate places. [2022-01-19 14:48:14,163 INFO L470 AbstractCegarLoop]: Abstraction has has 759 places, 4553 transitions, 150525 flow [2022-01-19 14:48:14,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 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) [2022-01-19 14:48:14,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:48:14,164 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:48:14,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 14:48:14,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:14,379 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:48:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:48:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash 943023525, now seen corresponding path program 18 times [2022-01-19 14:48:14,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:48:14,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114140165] [2022-01-19 14:48:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:48:14,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:48:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:48:14,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:48:14,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114140165] [2022-01-19 14:48:14,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114140165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:48:14,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269415361] [2022-01-19 14:48:14,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:48:14,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:48:14,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:48:14,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 14:48:14,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:48:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:48:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:48:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:48:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:48:14,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:48:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:48:14,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269415361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:48:14,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:48:14,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 14:48:14,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897008465] [2022-01-19 14:48:14,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:48:14,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:48:14,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:48:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:48:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:48:14,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:48:14,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 4553 transitions, 150525 flow. Second operand has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 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) [2022-01-19 14:48:14,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:48:14,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:48:14,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:48:35,717 INFO L129 PetriNetUnfolder]: 5435/15830 cut-off events. [2022-01-19 14:48:35,717 INFO L130 PetriNetUnfolder]: For 1972473/1972473 co-relation queries the response was YES. [2022-01-19 14:48:35,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202665 conditions, 15830 events. 5435/15830 cut-off events. For 1972473/1972473 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 180492 event pairs, 262 based on Foata normal form. 7/15797 useless extension candidates. Maximal degree in co-relation 202437. Up to 7040 conditions per place. [2022-01-19 14:48:36,069 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3566 selfloop transitions, 1210 changer transitions 2/4823 dead transitions. [2022-01-19 14:48:36,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 4823 transitions, 168799 flow [2022-01-19 14:48:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 14:48:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 14:48:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1789 transitions. [2022-01-19 14:48:36,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523128679562657 [2022-01-19 14:48:36,071 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1789 transitions. [2022-01-19 14:48:36,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1789 transitions. [2022-01-19 14:48:36,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:48:36,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1789 transitions. [2022-01-19 14:48:36,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 61.689655172413794) internal successors, (1789), 29 states have internal predecessors, (1789), 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) [2022-01-19 14:48:36,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 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) [2022-01-19 14:48:36,074 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 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) [2022-01-19 14:48:36,074 INFO L186 Difference]: Start difference. First operand has 759 places, 4553 transitions, 150525 flow. Second operand 29 states and 1789 transitions. [2022-01-19 14:48:36,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 4823 transitions, 168799 flow [2022-01-19 14:48:53,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 4823 transitions, 167657 flow, removed 38 selfloop flow, removed 16 redundant places. [2022-01-19 14:48:54,025 INFO L242 Difference]: Finished difference. Result has 775 places, 4711 transitions, 159250 flow [2022-01-19 14:48:54,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=149412, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=159250, PETRI_PLACES=775, PETRI_TRANSITIONS=4711} [2022-01-19 14:48:54,028 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 703 predicate places. [2022-01-19 14:48:54,028 INFO L470 AbstractCegarLoop]: Abstraction has has 775 places, 4711 transitions, 159250 flow [2022-01-19 14:48:54,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 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) [2022-01-19 14:48:54,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:48:54,028 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:48:54,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 14:48:54,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:54,236 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:48:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:48:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1222370885, now seen corresponding path program 19 times [2022-01-19 14:48:54,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:48:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152012133] [2022-01-19 14:48:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:48:54,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:48:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:48:54,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:48:54,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152012133] [2022-01-19 14:48:54,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152012133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:48:54,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985820227] [2022-01-19 14:48:54,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:48:54,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:48:54,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:48:54,310 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:48:54,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 14:48:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:48:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:48:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:48:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:48:54,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:48:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:48:54,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985820227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:48:54,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:48:54,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:48:54,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134623348] [2022-01-19 14:48:54,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:48:54,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:48:54,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:48:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:48:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:48:54,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:48:54,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 4711 transitions, 159250 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:48:54,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:48:54,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:48:54,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:49:17,982 INFO L129 PetriNetUnfolder]: 5652/16530 cut-off events. [2022-01-19 14:49:17,982 INFO L130 PetriNetUnfolder]: For 2319433/2319433 co-relation queries the response was YES. [2022-01-19 14:49:18,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217619 conditions, 16530 events. 5652/16530 cut-off events. For 2319433/2319433 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 190265 event pairs, 345 based on Foata normal form. 8/16492 useless extension candidates. Maximal degree in co-relation 217386. Up to 7605 conditions per place. [2022-01-19 14:49:18,495 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3789 selfloop transitions, 1132 changer transitions 8/4974 dead transitions. [2022-01-19 14:49:18,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 4974 transitions, 177869 flow [2022-01-19 14:49:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 14:49:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 14:49:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1956 transitions. [2022-01-19 14:49:18,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454268292682927 [2022-01-19 14:49:18,497 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1956 transitions. [2022-01-19 14:49:18,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1956 transitions. [2022-01-19 14:49:18,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:49:18,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1956 transitions. [2022-01-19 14:49:18,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 61.125) internal successors, (1956), 32 states have internal predecessors, (1956), 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) [2022-01-19 14:49:18,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 states have internal predecessors, (2706), 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) [2022-01-19 14:49:18,500 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 states have internal predecessors, (2706), 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) [2022-01-19 14:49:18,501 INFO L186 Difference]: Start difference. First operand has 775 places, 4711 transitions, 159250 flow. Second operand 32 states and 1956 transitions. [2022-01-19 14:49:18,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 4974 transitions, 177869 flow [2022-01-19 14:49:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 4974 transitions, 175037 flow, removed 684 selfloop flow, removed 15 redundant places. [2022-01-19 14:49:40,853 INFO L242 Difference]: Finished difference. Result has 800 places, 4876 transitions, 166576 flow [2022-01-19 14:49:40,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=156451, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=166576, PETRI_PLACES=800, PETRI_TRANSITIONS=4876} [2022-01-19 14:49:40,857 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 728 predicate places. [2022-01-19 14:49:40,857 INFO L470 AbstractCegarLoop]: Abstraction has has 800 places, 4876 transitions, 166576 flow [2022-01-19 14:49:40,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:49:40,857 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:49:40,857 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:49:40,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 14:49:41,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 14:49:41,072 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:49:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:49:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1692757929, now seen corresponding path program 20 times [2022-01-19 14:49:41,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:49:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176573024] [2022-01-19 14:49:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:49:41,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:49:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:49:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:49:41,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:49:41,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176573024] [2022-01-19 14:49:41,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176573024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:49:41,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404982945] [2022-01-19 14:49:41,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:49:41,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:49:41,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:49:41,152 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:49:41,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 14:49:41,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:49:41,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:49:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:49:41,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:49:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:49:41,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:49:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:49:41,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404982945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:49:41,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:49:41,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:49:41,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534169500] [2022-01-19 14:49:41,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:49:41,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:49:41,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:49:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:49:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:49:41,541 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:49:41,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 4876 transitions, 166576 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:49:41,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:49:41,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:49:41,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:50:07,516 INFO L129 PetriNetUnfolder]: 6190/18300 cut-off events. [2022-01-19 14:50:07,516 INFO L130 PetriNetUnfolder]: For 2755234/2755234 co-relation queries the response was YES. [2022-01-19 14:50:07,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244819 conditions, 18300 events. 6190/18300 cut-off events. For 2755234/2755234 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 215030 event pairs, 287 based on Foata normal form. 15/18268 useless extension candidates. Maximal degree in co-relation 244577. Up to 7307 conditions per place. [2022-01-19 14:50:08,112 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3830 selfloop transitions, 1629 changer transitions 17/5521 dead transitions. [2022-01-19 14:50:08,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 5521 transitions, 199576 flow [2022-01-19 14:50:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 14:50:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 14:50:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2517 transitions. [2022-01-19 14:50:08,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7486615110053539 [2022-01-19 14:50:08,128 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2517 transitions. [2022-01-19 14:50:08,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2517 transitions. [2022-01-19 14:50:08,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:50:08,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2517 transitions. [2022-01-19 14:50:08,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.390243902439025) internal successors, (2517), 41 states have internal predecessors, (2517), 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) [2022-01-19 14:50:08,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 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) [2022-01-19 14:50:08,143 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 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) [2022-01-19 14:50:08,143 INFO L186 Difference]: Start difference. First operand has 800 places, 4876 transitions, 166576 flow. Second operand 41 states and 2517 transitions. [2022-01-19 14:50:08,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 5521 transitions, 199576 flow [2022-01-19 14:50:40,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 5521 transitions, 196127 flow, removed 1543 selfloop flow, removed 15 redundant places. [2022-01-19 14:50:41,116 INFO L242 Difference]: Finished difference. Result has 841 places, 5267 transitions, 185093 flow [2022-01-19 14:50:41,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=164659, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=185093, PETRI_PLACES=841, PETRI_TRANSITIONS=5267} [2022-01-19 14:50:41,119 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 769 predicate places. [2022-01-19 14:50:41,119 INFO L470 AbstractCegarLoop]: Abstraction has has 841 places, 5267 transitions, 185093 flow [2022-01-19 14:50:41,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:50:41,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:50:41,119 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:50:41,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-19 14:50:41,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 14:50:41,335 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:50:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:50:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash -909859479, now seen corresponding path program 21 times [2022-01-19 14:50:41,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:50:41,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927039345] [2022-01-19 14:50:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:50:41,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:50:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:50:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:50:41,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:50:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927039345] [2022-01-19 14:50:41,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927039345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:50:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533959155] [2022-01-19 14:50:41,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:50:41,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:50:41,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:50:41,435 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:50:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 14:50:41,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:50:41,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:50:41,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:50:41,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:50:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:50:41,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:50:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:50:41,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533959155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:50:41,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:50:41,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 14:50:41,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399599712] [2022-01-19 14:50:41,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:50:41,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 14:50:41,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:50:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 14:50:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-19 14:50:41,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:50:41,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 5267 transitions, 185093 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:50:41,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:50:41,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:50:41,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:51:09,322 INFO L129 PetriNetUnfolder]: 6178/18223 cut-off events. [2022-01-19 14:51:09,323 INFO L130 PetriNetUnfolder]: For 1695143/1695143 co-relation queries the response was YES. [2022-01-19 14:51:09,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229667 conditions, 18223 events. 6178/18223 cut-off events. For 1695143/1695143 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 213789 event pairs, 311 based on Foata normal form. 1/18179 useless extension candidates. Maximal degree in co-relation 229408. Up to 8820 conditions per place. [2022-01-19 14:51:09,772 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 4247 selfloop transitions, 997 changer transitions 4/5293 dead transitions. [2022-01-19 14:51:09,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 5293 transitions, 195991 flow [2022-01-19 14:51:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 14:51:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 14:51:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1097 transitions. [2022-01-19 14:51:09,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7432249322493225 [2022-01-19 14:51:09,773 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1097 transitions. [2022-01-19 14:51:09,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1097 transitions. [2022-01-19 14:51:09,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:51:09,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1097 transitions. [2022-01-19 14:51:09,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 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) [2022-01-19 14:51:09,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 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) [2022-01-19 14:51:09,775 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 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) [2022-01-19 14:51:09,775 INFO L186 Difference]: Start difference. First operand has 841 places, 5267 transitions, 185093 flow. Second operand 18 states and 1097 transitions. [2022-01-19 14:51:09,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 5293 transitions, 195991 flow [2022-01-19 14:51:36,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 5293 transitions, 193291 flow, removed 1055 selfloop flow, removed 22 redundant places. [2022-01-19 14:51:36,665 INFO L242 Difference]: Finished difference. Result has 836 places, 5266 transitions, 184391 flow [2022-01-19 14:51:36,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=182399, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=184391, PETRI_PLACES=836, PETRI_TRANSITIONS=5266} [2022-01-19 14:51:36,668 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 764 predicate places. [2022-01-19 14:51:36,668 INFO L470 AbstractCegarLoop]: Abstraction has has 836 places, 5266 transitions, 184391 flow [2022-01-19 14:51:36,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 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) [2022-01-19 14:51:36,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:51:36,669 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:51:36,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-19 14:51:36,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:51:36,884 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:51:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:51:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1966582809, now seen corresponding path program 22 times [2022-01-19 14:51:36,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:51:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021672291] [2022-01-19 14:51:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:51:36,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:51:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:51:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:51:36,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:51:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021672291] [2022-01-19 14:51:36,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021672291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:51:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279951898] [2022-01-19 14:51:36,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:51:36,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:51:36,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:51:36,950 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:51:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 14:51:36,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:51:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:51:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:51:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:51:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:51:37,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:51:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:51:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279951898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:51:37,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:51:37,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 14:51:37,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658472273] [2022-01-19 14:51:37,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:51:37,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:51:37,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:51:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:51:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:51:37,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:51:37,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 5266 transitions, 184391 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 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) [2022-01-19 14:51:37,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:51:37,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:51:37,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:08,302 INFO L129 PetriNetUnfolder]: 6337/18556 cut-off events. [2022-01-19 14:52:08,302 INFO L130 PetriNetUnfolder]: For 1522455/1522455 co-relation queries the response was YES. [2022-01-19 14:52:08,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230565 conditions, 18556 events. 6337/18556 cut-off events. For 1522455/1522455 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 217696 event pairs, 282 based on Foata normal form. 71/18600 useless extension candidates. Maximal degree in co-relation 230309. Up to 7117 conditions per place. [2022-01-19 14:52:08,771 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1843 selfloop transitions, 3694 changer transitions 7/5589 dead transitions. [2022-01-19 14:52:08,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 5589 transitions, 204964 flow [2022-01-19 14:52:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 14:52:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 14:52:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2093 transitions. [2022-01-19 14:52:08,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7507173601147776 [2022-01-19 14:52:08,773 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2093 transitions. [2022-01-19 14:52:08,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2093 transitions. [2022-01-19 14:52:08,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:08,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2093 transitions. [2022-01-19 14:52:08,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.55882352941177) internal successors, (2093), 34 states have internal predecessors, (2093), 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) [2022-01-19 14:52:08,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 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) [2022-01-19 14:52:08,776 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 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) [2022-01-19 14:52:08,776 INFO L186 Difference]: Start difference. First operand has 836 places, 5266 transitions, 184391 flow. Second operand 34 states and 2093 transitions. [2022-01-19 14:52:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 5589 transitions, 204964 flow [2022-01-19 14:52:33,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 5589 transitions, 204437 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-01-19 14:52:33,596 INFO L242 Difference]: Finished difference. Result has 863 places, 5433 transitions, 204363 flow [2022-01-19 14:52:33,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=183407, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=204363, PETRI_PLACES=863, PETRI_TRANSITIONS=5433} [2022-01-19 14:52:33,600 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 791 predicate places. [2022-01-19 14:52:33,600 INFO L470 AbstractCegarLoop]: Abstraction has has 863 places, 5433 transitions, 204363 flow [2022-01-19 14:52:33,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 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) [2022-01-19 14:52:33,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:33,601 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 14:52:33,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 14:52:33,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:33,816 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1169067223, now seen corresponding path program 23 times [2022-01-19 14:52:33,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161976736] [2022-01-19 14:52:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:33,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:33,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161976736] [2022-01-19 14:52:33,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161976736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695532494] [2022-01-19 14:52:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:52:33,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:33,897 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:52:33,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 14:52:33,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:52:33,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:52:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:52:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:34,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:52:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:52:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695532494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:52:34,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:52:34,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 14:52:34,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211671072] [2022-01-19 14:52:34,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:52:34,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 14:52:34,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 14:52:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-19 14:52:34,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:52:34,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 5433 transitions, 204363 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 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) [2022-01-19 14:52:34,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:34,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:52:34,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:53:10,681 INFO L129 PetriNetUnfolder]: 6683/19593 cut-off events. [2022-01-19 14:53:10,681 INFO L130 PetriNetUnfolder]: For 1850363/1850363 co-relation queries the response was YES. [2022-01-19 14:53:11,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259876 conditions, 19593 events. 6683/19593 cut-off events. For 1850363/1850363 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 231483 event pairs, 246 based on Foata normal form. 86/19657 useless extension candidates. Maximal degree in co-relation 259613. Up to 5832 conditions per place. [2022-01-19 14:53:11,311 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1834 selfloop transitions, 4002 changer transitions 7/5888 dead transitions. [2022-01-19 14:53:11,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 894 places, 5888 transitions, 231487 flow [2022-01-19 14:53:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 14:53:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 14:53:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2222 transitions. [2022-01-19 14:53:11,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.752710027100271 [2022-01-19 14:53:11,313 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2222 transitions. [2022-01-19 14:53:11,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2222 transitions. [2022-01-19 14:53:11,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:53:11,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2222 transitions. [2022-01-19 14:53:11,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 61.72222222222222) internal successors, (2222), 36 states have internal predecessors, (2222), 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) [2022-01-19 14:53:11,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 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) [2022-01-19 14:53:11,317 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 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) [2022-01-19 14:53:11,317 INFO L186 Difference]: Start difference. First operand has 863 places, 5433 transitions, 204363 flow. Second operand 36 states and 2222 transitions. [2022-01-19 14:53:11,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 894 places, 5888 transitions, 231487 flow [2022-01-19 14:53:43,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 5888 transitions, 230003 flow, removed 421 selfloop flow, removed 21 redundant places. [2022-01-19 14:53:43,322 INFO L242 Difference]: Finished difference. Result has 886 places, 5703 transitions, 229792 flow [2022-01-19 14:53:43,325 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=202582, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=229792, PETRI_PLACES=886, PETRI_TRANSITIONS=5703} [2022-01-19 14:53:43,326 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 814 predicate places. [2022-01-19 14:53:43,326 INFO L470 AbstractCegarLoop]: Abstraction has has 886 places, 5703 transitions, 229792 flow [2022-01-19 14:53:43,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 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) [2022-01-19 14:53:43,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:53:43,326 INFO L254 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] [2022-01-19 14:53:43,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 14:53:43,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 14:53:43,540 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:53:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:53:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash -691720079, now seen corresponding path program 24 times [2022-01-19 14:53:43,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:53:43,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844237860] [2022-01-19 14:53:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:53:43,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:53:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:53:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:43,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:53:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844237860] [2022-01-19 14:53:43,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844237860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:53:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417016918] [2022-01-19 14:53:43,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:53:43,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:53:43,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:53:43,632 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:53:43,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 14:53:43,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:53:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:53:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 14:53:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:53:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:43,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:53:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:44,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417016918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:53:44,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:53:44,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2022-01-19 14:53:44,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570884083] [2022-01-19 14:53:44,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:53:44,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 14:53:44,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:53:44,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 14:53:44,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-19 14:53:44,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 14:53:44,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 5703 transitions, 229792 flow. Second operand has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 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) [2022-01-19 14:53:44,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:53:44,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 14:53:44,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:54:26,639 INFO L129 PetriNetUnfolder]: 10360/32319 cut-off events. [2022-01-19 14:54:26,640 INFO L130 PetriNetUnfolder]: For 3247787/3248546 co-relation queries the response was YES. [2022-01-19 14:54:28,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429620 conditions, 32319 events. 10360/32319 cut-off events. For 3247787/3248546 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 417467 event pairs, 295 based on Foata normal form. 214/32418 useless extension candidates. Maximal degree in co-relation 429349. Up to 6901 conditions per place. [2022-01-19 14:54:28,340 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 2640 selfloop transitions, 2476 changer transitions 315/8121 dead transitions. [2022-01-19 14:54:28,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 8121 transitions, 355605 flow [2022-01-19 14:54:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 14:54:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 14:54:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2022-01-19 14:54:28,341 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-01-19 14:54:28,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2022-01-19 14:54:28,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2022-01-19 14:54:28,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:54:28,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2022-01-19 14:54:28,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 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) [2022-01-19 14:54:28,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 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) [2022-01-19 14:54:28,342 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 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) [2022-01-19 14:54:28,342 INFO L186 Difference]: Start difference. First operand has 886 places, 5703 transitions, 229792 flow. Second operand 7 states and 462 transitions. [2022-01-19 14:54:28,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 8121 transitions, 355605 flow [2022-01-19 14:55:42,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 8121 transitions, 353621 flow, removed 572 selfloop flow, removed 16 redundant places. [2022-01-19 14:55:43,026 INFO L242 Difference]: Finished difference. Result has 881 places, 7617 transitions, 332602 flow [2022-01-19 14:55:43,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=228353, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332602, PETRI_PLACES=881, PETRI_TRANSITIONS=7617} [2022-01-19 14:55:43,030 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 809 predicate places. [2022-01-19 14:55:43,030 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 7617 transitions, 332602 flow [2022-01-19 14:55:43,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 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) [2022-01-19 14:55:43,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:55:43,031 INFO L254 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] [2022-01-19 14:55:43,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 14:55:43,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 14:55:43,247 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:55:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:55:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 221206373, now seen corresponding path program 25 times [2022-01-19 14:55:43,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:55:43,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176619079] [2022-01-19 14:55:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:55:43,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:55:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:55:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:55:43,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:55:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176619079] [2022-01-19 14:55:43,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176619079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:55:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900593868] [2022-01-19 14:55:43,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:55:43,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:55:43,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:55:43,336 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:55:43,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 14:55:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:55:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 14:55:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:55:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:55:43,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:55:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:55:43,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900593868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:55:43,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:55:43,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-19 14:55:43,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974693600] [2022-01-19 14:55:43,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:55:43,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 14:55:43,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:55:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 14:55:43,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-19 14:55:43,924 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:55:43,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 7617 transitions, 332602 flow. Second operand has 25 states, 25 states have (on average 59.2) internal successors, (1480), 25 states have internal predecessors, (1480), 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) [2022-01-19 14:55:43,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:55:43,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:55:43,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:57:31,935 INFO L129 PetriNetUnfolder]: 11508/34167 cut-off events. [2022-01-19 14:57:31,935 INFO L130 PetriNetUnfolder]: For 3888132/3888132 co-relation queries the response was YES. [2022-01-19 14:57:32,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487026 conditions, 34167 events. 11508/34167 cut-off events. For 3888132/3888132 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 438426 event pairs, 231 based on Foata normal form. 250/34357 useless extension candidates. Maximal degree in co-relation 486750. Up to 7166 conditions per place. [2022-01-19 14:57:33,317 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 1181 selfloop transitions, 8387 changer transitions 401/10014 dead transitions. [2022-01-19 14:57:33,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 946 places, 10014 transitions, 445885 flow [2022-01-19 14:57:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 14:57:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 14:57:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4173 transitions. [2022-01-19 14:57:33,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7483859397417504 [2022-01-19 14:57:33,321 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4173 transitions. [2022-01-19 14:57:33,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4173 transitions. [2022-01-19 14:57:33,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:57:33,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4173 transitions. [2022-01-19 14:57:33,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 61.36764705882353) internal successors, (4173), 68 states have internal predecessors, (4173), 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) [2022-01-19 14:57:33,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 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) [2022-01-19 14:57:33,340 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 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) [2022-01-19 14:57:33,340 INFO L186 Difference]: Start difference. First operand has 881 places, 7617 transitions, 332602 flow. Second operand 68 states and 4173 transitions. [2022-01-19 14:57:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 946 places, 10014 transitions, 445885 flow [2022-01-19 14:59:04,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 10014 transitions, 443869 flow, removed 685 selfloop flow, removed 4 redundant places. [2022-01-19 14:59:04,624 INFO L242 Difference]: Finished difference. Result has 984 places, 9382 transitions, 428170 flow [2022-01-19 14:59:04,630 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=330936, PETRI_DIFFERENCE_MINUEND_PLACES=875, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6718, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=428170, PETRI_PLACES=984, PETRI_TRANSITIONS=9382} [2022-01-19 14:59:04,632 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 912 predicate places. [2022-01-19 14:59:04,632 INFO L470 AbstractCegarLoop]: Abstraction has has 984 places, 9382 transitions, 428170 flow [2022-01-19 14:59:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.2) internal successors, (1480), 25 states have internal predecessors, (1480), 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) [2022-01-19 14:59:04,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:59:04,633 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-19 14:59:04,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 14:59:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 14:59:04,848 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:59:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:59:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1344761541, now seen corresponding path program 26 times [2022-01-19 14:59:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:59:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929684633] [2022-01-19 14:59:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:59:04,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:59:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:59:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:59:04,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:59:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929684633] [2022-01-19 14:59:04,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929684633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:59:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663161133] [2022-01-19 14:59:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:59:04,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:59:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:59:04,973 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:59:04,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 14:59:05,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:59:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:59:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 14:59:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:59:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:59:05,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:59:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:59:05,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663161133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:59:05,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:59:05,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 31 [2022-01-19 14:59:05,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573018921] [2022-01-19 14:59:05,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:59:05,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 14:59:05,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:59:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 14:59:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-01-19 14:59:05,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 14:59:05,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 9382 transitions, 428170 flow. Second operand has 31 states, 31 states have (on average 59.45161290322581) internal successors, (1843), 31 states have internal predecessors, (1843), 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) [2022-01-19 14:59:05,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:59:05,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 14:59:05,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 14:59:21,202 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:59:21,202 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:59:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 14:59:21,237 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 14:59:21,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 14:59:21,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:59:21,457 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 57/82 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 47070 conditions, 2574 events (969/2573 cut-off events. For 423740/423740 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 24939 event pairs, 1 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 46755. Up to 777 conditions per place.). [2022-01-19 14:59:21,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 14:59:21,470 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 14:59:21,472 INFO L732 BasicCegarLoop]: Path program histogram: [26, 2, 1, 1] [2022-01-19 14:59:21,473 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:59:21,474 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:59:21,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:59:21 BasicIcfg [2022-01-19 14:59:21,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:59:21,480 INFO L158 Benchmark]: Toolchain (without parser) took 848834.70ms. Allocated memory was 379.6MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 321.9MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2022-01-19 14:59:21,480 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 379.6MB. Free memory was 338.3MB in the beginning and 338.2MB in the end (delta: 65.6kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:59:21,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.96ms. Allocated memory was 379.6MB in the beginning and 511.7MB in the end (delta: 132.1MB). Free memory was 321.7MB in the beginning and 481.0MB in the end (delta: -159.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.0GB. [2022-01-19 14:59:21,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.58ms. Allocated memory is still 511.7MB. Free memory was 481.0MB in the beginning and 480.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:59:21,480 INFO L158 Benchmark]: Boogie Preprocessor took 27.85ms. Allocated memory is still 511.7MB. Free memory was 480.0MB in the beginning and 478.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:59:21,480 INFO L158 Benchmark]: RCFGBuilder took 332.56ms. Allocated memory is still 511.7MB. Free memory was 478.9MB in the beginning and 463.2MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 14:59:21,481 INFO L158 Benchmark]: TraceAbstraction took 848242.28ms. Allocated memory was 511.7MB in the beginning and 7.8GB in the end (delta: 7.3GB). Free memory was 463.2MB in the beginning and 3.7GB in the end (delta: -3.3GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2022-01-19 14:59:21,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 379.6MB. Free memory was 338.3MB in the beginning and 338.2MB in the end (delta: 65.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 199.96ms. Allocated memory was 379.6MB in the beginning and 511.7MB in the end (delta: 132.1MB). Free memory was 321.7MB in the beginning and 481.0MB in the end (delta: -159.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.58ms. Allocated memory is still 511.7MB. Free memory was 481.0MB in the beginning and 480.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 27.85ms. Allocated memory is still 511.7MB. Free memory was 480.0MB in the beginning and 478.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 332.56ms. Allocated memory is still 511.7MB. Free memory was 478.9MB in the beginning and 463.2MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 848242.28ms. Allocated memory was 511.7MB in the beginning and 7.8GB in the end (delta: 7.3GB). Free memory was 463.2MB in the beginning and 3.7GB in the end (delta: -3.3GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 57/82 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 47070 conditions, 2574 events (969/2573 cut-off events. For 423740/423740 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 24939 event pairs, 1 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 46755. Up to 777 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 57/82 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 47070 conditions, 2574 events (969/2573 cut-off events. For 423740/423740 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 24939 event pairs, 1 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 46755. Up to 777 conditions per place.). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 57/82 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 47070 conditions, 2574 events (969/2573 cut-off events. For 423740/423740 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 24939 event pairs, 1 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 46755. Up to 777 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 848.2s, OverallIterations: 30, TraceHistogramMax: 3, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 825.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4204 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4204 mSDsluCounter, 3271 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4847 mSDsCounter, 1866 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15498 IncrementalHoareTripleChecker+Invalid, 17364 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1866 mSolverCounterUnsat, 558 mSDtfsCounter, 15498 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4767 GetRequests, 3385 SyntacticMatches, 35 SemanticMatches, 1347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24040 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=428170occurred in iteration=29, InterpolantAutomatonStates: 993, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 3947 NumberOfCodeBlocks, 3922 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 5685 ConstructedInterpolants, 0 QuantifiedInterpolants, 17876 SizeOfPredicates, 244 NumberOfNonLiveVariables, 4120 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 83 InterpolantComputations, 4 PerfectInterpolantSequences, 364/651 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown