/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-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:30:33,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:30:33,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:30:33,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:30:33,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:30:33,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:30:33,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:30:33,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:30:33,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:30:33,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:30:33,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:30:33,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:30:33,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:30:33,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:30:33,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:30:33,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:30:33,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:30:33,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:30:33,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:30:33,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:30:33,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:30:33,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:30:33,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:30:33,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:30:33,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:30:33,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:30:33,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:30:33,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:30:33,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:30:33,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:30:33,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:30:33,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:30:33,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:30:33,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:30:33,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:30:33,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:30:33,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:30:33,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:30:33,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:30:33,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:30:33,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:30:33,873 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-Before.epf [2022-01-19 08:30:33,899 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:30:33,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:30:33,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:30:33,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:30:33,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:30:33,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:30:33,901 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:30:33,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:30:33,901 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:30:33,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:30:33,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:30:33,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:30:33,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:30:33,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:30:33,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:30:33,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:30:33,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:30:33,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:30:33,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:30:33,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:30:33,904 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:30:33,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:30:33,904 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:30:33,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:30:34,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:30:34,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:30:34,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:30:34,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:30:34,084 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:30:34,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 08:30:34,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784761bce/cad99f84c13048bbb9857228edee29cf/FLAG2d99d3e28 [2022-01-19 08:30:34,469 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:30:34,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 08:30:34,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784761bce/cad99f84c13048bbb9857228edee29cf/FLAG2d99d3e28 [2022-01-19 08:30:34,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784761bce/cad99f84c13048bbb9857228edee29cf [2022-01-19 08:30:34,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:30:34,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:30:34,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:30:34,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:30:34,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:30:34,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:30:34" (1/1) ... [2022-01-19 08:30:34,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589ab56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:34, skipping insertion in model container [2022-01-19 08:30:34,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:30:34" (1/1) ... [2022-01-19 08:30:34,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:30:34,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:30:35,041 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-01-19 08:30:35,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:30:35,047 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:30:35,058 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-01-19 08:30:35,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:30:35,081 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:30:35,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35 WrapperNode [2022-01-19 08:30:35,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:30:35,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:30:35,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:30:35,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:30:35,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,107 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-01-19 08:30:35,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:30:35,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:30:35,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:30:35,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:30:35,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:30:35,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:30:35,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:30:35,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:30:35,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (1/1) ... [2022-01-19 08:30:35,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:30:35,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:35,200 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 08:30:35,216 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 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:30:35,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:30:35,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:30:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:30:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:30:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:30:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:30:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:30:35,235 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 08:30:35,315 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:30:35,316 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:30:35,450 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:30:35,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:30:35,474 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 08:30:35,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:30:35 BoogieIcfgContainer [2022-01-19 08:30:35,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:30:35,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:30:35,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:30:35,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:30:35,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:30:34" (1/3) ... [2022-01-19 08:30:35,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49efc4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:30:35, skipping insertion in model container [2022-01-19 08:30:35,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:30:35" (2/3) ... [2022-01-19 08:30:35,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49efc4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:30:35, skipping insertion in model container [2022-01-19 08:30:35,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:30:35" (3/3) ... [2022-01-19 08:30:35,495 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-01-19 08:30:35,498 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:30:35,498 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:30:35,498 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:30:35,532 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,532 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,532 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,535 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,536 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,540 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,541 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,541 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,542 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,542 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,543 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,543 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,548 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,548 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,548 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,548 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,549 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,549 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,549 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,549 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:30:35,552 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:30:35,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:30:35,595 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 08:30:35,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:30:35,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 08:30:35,644 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-01-19 08:30:35,644 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:30:35,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-01-19 08:30:35,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 08:30:35,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-01-19 08:30:35,666 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-01-19 08:30:35,666 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:30:35,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:35,667 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] [2022-01-19 08:30:35,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times [2022-01-19 08:30:35,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:35,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831507169] [2022-01-19 08:30:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:35,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:36,022 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 08:30:36,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:36,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831507169] [2022-01-19 08:30:36,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831507169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:30:36,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:30:36,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:30:36,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283428990] [2022-01-19 08:30:36,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:30:36,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:30:36,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:30:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:30:36,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-01-19 08:30:36,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 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 08:30:36,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:36,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-01-19 08:30:36,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:36,168 INFO L129 PetriNetUnfolder]: 34/134 cut-off events. [2022-01-19 08:30:36,168 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-01-19 08:30:36,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 294 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place. [2022-01-19 08:30:36,170 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2022-01-19 08:30:36,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow [2022-01-19 08:30:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:30:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:30:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions. [2022-01-19 08:30:36,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2022-01-19 08:30:36,181 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions. [2022-01-19 08:30:36,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions. [2022-01-19 08:30:36,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:36,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions. [2022-01-19 08:30:36,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 08:30:36,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 08:30:36,190 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 08:30:36,191 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions. [2022-01-19 08:30:36,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow [2022-01-19 08:30:36,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:30:36,195 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow [2022-01-19 08:30:36,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-01-19 08:30:36,198 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-01-19 08:30:36,199 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow [2022-01-19 08:30:36,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 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 08:30:36,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:36,203 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] [2022-01-19 08:30:36,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:30:36,204 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -676251899, now seen corresponding path program 1 times [2022-01-19 08:30:36,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983492666] [2022-01-19 08:30:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:36,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:36,290 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 08:30:36,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983492666] [2022-01-19 08:30:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983492666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:30:36,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:30:36,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 08:30:36,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460271063] [2022-01-19 08:30:36,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:30:36,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 08:30:36,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 08:30:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 08:30:36,293 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 84 [2022-01-19 08:30:36,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 08:30:36,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:36,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 84 [2022-01-19 08:30:36,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:36,379 INFO L129 PetriNetUnfolder]: 61/239 cut-off events. [2022-01-19 08:30:36,379 INFO L130 PetriNetUnfolder]: For 23/37 co-relation queries the response was YES. [2022-01-19 08:30:36,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 239 events. 61/239 cut-off events. For 23/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 908 event pairs, 26 based on Foata normal form. 12/236 useless extension candidates. Maximal degree in co-relation 220. Up to 75 conditions per place. [2022-01-19 08:30:36,383 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 25 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2022-01-19 08:30:36,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 266 flow [2022-01-19 08:30:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:30:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:30:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-01-19 08:30:36,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.830952380952381 [2022-01-19 08:30:36,389 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-01-19 08:30:36,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-01-19 08:30:36,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:36,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-01-19 08:30:36,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 08:30:36,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 08:30:36,394 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 08:30:36,394 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 5 states and 349 transitions. [2022-01-19 08:30:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 266 flow [2022-01-19 08:30:36,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:30:36,399 INFO L242 Difference]: Finished difference. Result has 76 places, 70 transitions, 172 flow [2022-01-19 08:30:36,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2022-01-19 08:30:36,400 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-01-19 08:30:36,401 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 172 flow [2022-01-19 08:30:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 08:30:36,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:36,401 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] [2022-01-19 08:30:36,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:30:36,401 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1495906757, now seen corresponding path program 2 times [2022-01-19 08:30:36,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:36,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283698568] [2022-01-19 08:30:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:36,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:36,531 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 08:30:36,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283698568] [2022-01-19 08:30:36,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283698568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:36,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230144736] [2022-01-19 08:30:36,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:30:36,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:36,535 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 08:30:36,541 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 08:30:36,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-19 08:30:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:36,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:30:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:36,845 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 08:30:36,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:30:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230144736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:30:36,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:30:36,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 08:30:36,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597305216] [2022-01-19 08:30:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:30:36,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:30:36,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:30:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-19 08:30:36,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-01-19 08:30:36,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 08:30:36,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:36,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-01-19 08:30:36,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:36,984 INFO L129 PetriNetUnfolder]: 54/189 cut-off events. [2022-01-19 08:30:36,985 INFO L130 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2022-01-19 08:30:36,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 189 events. 54/189 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 594 event pairs, 24 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 250. Up to 73 conditions per place. [2022-01-19 08:30:36,988 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-01-19 08:30:36,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 251 flow [2022-01-19 08:30:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:30:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:30:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2022-01-19 08:30:36,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2022-01-19 08:30:36,989 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2022-01-19 08:30:36,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2022-01-19 08:30:36,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:36,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2022-01-19 08:30:36,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 08:30:36,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 08:30:36,993 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 08:30:36,993 INFO L186 Difference]: Start difference. First operand has 76 places, 70 transitions, 172 flow. Second operand 8 states and 470 transitions. [2022-01-19 08:30:36,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 251 flow [2022-01-19 08:30:36,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 08:30:37,002 INFO L242 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow [2022-01-19 08:30:37,003 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2022-01-19 08:30:37,004 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-01-19 08:30:37,004 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow [2022-01-19 08:30:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 08:30:37,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:37,005 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, 1, 1] [2022-01-19 08:30:37,030 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 08:30:37,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:37,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash 352825635, now seen corresponding path program 1 times [2022-01-19 08:30:37,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780523225] [2022-01-19 08:30:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:37,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:37,432 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 08:30:37,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780523225] [2022-01-19 08:30:37,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780523225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506970365] [2022-01-19 08:30:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:37,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:37,437 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 08:30:37,438 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 08:30:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:37,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:30:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:37,680 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 08:30:37,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:37,900 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 08:30:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506970365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:37,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 13 [2022-01-19 08:30:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232026970] [2022-01-19 08:30:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 08:30:37,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 08:30:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-19 08:30:37,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 08:30:37,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 08:30:37,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:37,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 08:30:37,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:38,151 INFO L129 PetriNetUnfolder]: 138/484 cut-off events. [2022-01-19 08:30:38,152 INFO L130 PetriNetUnfolder]: For 114/121 co-relation queries the response was YES. [2022-01-19 08:30:38,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 484 events. 138/484 cut-off events. For 114/121 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2579 event pairs, 21 based on Foata normal form. 13/482 useless extension candidates. Maximal degree in co-relation 445. Up to 80 conditions per place. [2022-01-19 08:30:38,154 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 56 selfloop transitions, 23 changer transitions 18/141 dead transitions. [2022-01-19 08:30:38,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 580 flow [2022-01-19 08:30:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:30:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:30:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 944 transitions. [2022-01-19 08:30:38,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2022-01-19 08:30:38,157 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 944 transitions. [2022-01-19 08:30:38,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 944 transitions. [2022-01-19 08:30:38,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:38,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 944 transitions. [2022-01-19 08:30:38,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0) internal successors, (944), 16 states have internal predecessors, (944), 0 states have call successors, (0), 0 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 08:30:38,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 08:30:38,161 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 08:30:38,161 INFO L186 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 16 states and 944 transitions. [2022-01-19 08:30:38,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 580 flow [2022-01-19 08:30:38,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 141 transitions, 558 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 08:30:38,166 INFO L242 Difference]: Finished difference. Result has 102 places, 92 transitions, 354 flow [2022-01-19 08:30:38,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=354, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2022-01-19 08:30:38,166 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-01-19 08:30:38,166 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 354 flow [2022-01-19 08:30:38,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.84615384615385) internal successors, (739), 13 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 08:30:38,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:38,167 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, 1, 1] [2022-01-19 08:30:38,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 08:30:38,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-19 08:30:38,382 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1408734365, now seen corresponding path program 2 times [2022-01-19 08:30:38,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:38,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434496481] [2022-01-19 08:30:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:38,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:38,502 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 08:30:38,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434496481] [2022-01-19 08:30:38,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434496481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284254882] [2022-01-19 08:30:38,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:30:38,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:38,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:38,504 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 08:30:38,505 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 08:30:38,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:30:38,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:38,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:30:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:38,738 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 08:30:38,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:39,003 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 08:30:39,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284254882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:39,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:39,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-01-19 08:30:39,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046799740] [2022-01-19 08:30:39,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:39,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:30:39,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:30:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:30:39,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:39,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 354 flow. Second operand has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 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 08:30:39,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:39,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:39,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:39,614 INFO L129 PetriNetUnfolder]: 339/894 cut-off events. [2022-01-19 08:30:39,614 INFO L130 PetriNetUnfolder]: For 1635/1638 co-relation queries the response was YES. [2022-01-19 08:30:39,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 894 events. 339/894 cut-off events. For 1635/1638 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5089 event pairs, 9 based on Foata normal form. 18/911 useless extension candidates. Maximal degree in co-relation 2779. Up to 186 conditions per place. [2022-01-19 08:30:39,620 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 78 selfloop transitions, 104 changer transitions 10/251 dead transitions. [2022-01-19 08:30:39,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 251 transitions, 1675 flow [2022-01-19 08:30:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 08:30:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 08:30:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-01-19 08:30:39,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-01-19 08:30:39,624 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-01-19 08:30:39,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-01-19 08:30:39,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:39,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-01-19 08:30:39,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 08:30:39,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 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 08:30:39,632 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 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 08:30:39,632 INFO L186 Difference]: Start difference. First operand has 102 places, 92 transitions, 354 flow. Second operand 32 states and 2124 transitions. [2022-01-19 08:30:39,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 251 transitions, 1675 flow [2022-01-19 08:30:39,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 1667 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-01-19 08:30:39,641 INFO L242 Difference]: Finished difference. Result has 146 places, 179 transitions, 1339 flow [2022-01-19 08:30:39,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1339, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2022-01-19 08:30:39,641 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 72 predicate places. [2022-01-19 08:30:39,641 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1339 flow [2022-01-19 08:30:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 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 08:30:39,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:39,642 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, 1, 1] [2022-01-19 08:30:39,663 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 08:30:39,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:39,856 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1501259667, now seen corresponding path program 3 times [2022-01-19 08:30:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:39,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444289845] [2022-01-19 08:30:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:39,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:39,951 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 08:30:39,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:39,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444289845] [2022-01-19 08:30:39,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444289845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:39,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116414659] [2022-01-19 08:30:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:30:39,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:39,953 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 08:30:39,954 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 08:30:40,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:30:40,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:30:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:40,242 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 08:30:40,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:40,771 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 08:30:40,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116414659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:40,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:40,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 08:30:40,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595859123] [2022-01-19 08:30:40,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:40,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:30:40,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:30:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:30:40,774 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:40,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1339 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 08:30:40,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:40,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:40,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:41,450 INFO L129 PetriNetUnfolder]: 429/1093 cut-off events. [2022-01-19 08:30:41,450 INFO L130 PetriNetUnfolder]: For 8495/8502 co-relation queries the response was YES. [2022-01-19 08:30:41,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 1093 events. 429/1093 cut-off events. For 8495/8502 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6293 event pairs, 7 based on Foata normal form. 4/1094 useless extension candidates. Maximal degree in co-relation 5448. Up to 278 conditions per place. [2022-01-19 08:30:41,461 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 132 selfloop transitions, 199 changer transitions 4/394 dead transitions. [2022-01-19 08:30:41,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 394 transitions, 4442 flow [2022-01-19 08:30:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 08:30:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 08:30:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-01-19 08:30:41,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-01-19 08:30:41,464 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-01-19 08:30:41,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-01-19 08:30:41,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:41,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-01-19 08:30:41,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 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 08:30:41,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 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 08:30:41,472 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 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 08:30:41,472 INFO L186 Difference]: Start difference. First operand has 146 places, 179 transitions, 1339 flow. Second operand 30 states and 1973 transitions. [2022-01-19 08:30:41,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 394 transitions, 4442 flow [2022-01-19 08:30:41,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 394 transitions, 4170 flow, removed 129 selfloop flow, removed 2 redundant places. [2022-01-19 08:30:41,507 INFO L242 Difference]: Finished difference. Result has 190 places, 328 transitions, 3650 flow [2022-01-19 08:30:41,507 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3650, PETRI_PLACES=190, PETRI_TRANSITIONS=328} [2022-01-19 08:30:41,509 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 116 predicate places. [2022-01-19 08:30:41,509 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 328 transitions, 3650 flow [2022-01-19 08:30:41,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 08:30:41,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:41,510 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, 1, 1] [2022-01-19 08:30:41,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-19 08:30:41,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:41,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1484681127, now seen corresponding path program 4 times [2022-01-19 08:30:41,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:41,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664252883] [2022-01-19 08:30:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:41,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:41,830 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 08:30:41,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664252883] [2022-01-19 08:30:41,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664252883] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836515522] [2022-01-19 08:30:41,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:30:41,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:41,831 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 08:30:41,832 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 08:30:41,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:30:41,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:30:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:42,062 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 08:30:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:42,551 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 08:30:42,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836515522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:42,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:42,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 08:30:42,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838881076] [2022-01-19 08:30:42,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:42,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:30:42,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:30:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:30:42,553 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:42,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 328 transitions, 3650 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 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 08:30:42,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:42,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:42,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:43,140 INFO L129 PetriNetUnfolder]: 565/1466 cut-off events. [2022-01-19 08:30:43,140 INFO L130 PetriNetUnfolder]: For 16785/16799 co-relation queries the response was YES. [2022-01-19 08:30:43,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8985 conditions, 1466 events. 565/1466 cut-off events. For 16785/16799 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9358 event pairs, 14 based on Foata normal form. 8/1471 useless extension candidates. Maximal degree in co-relation 8675. Up to 356 conditions per place. [2022-01-19 08:30:43,159 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 145 selfloop transitions, 272 changer transitions 6/482 dead transitions. [2022-01-19 08:30:43,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 482 transitions, 6693 flow [2022-01-19 08:30:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 08:30:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 08:30:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-01-19 08:30:43,163 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-01-19 08:30:43,163 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-01-19 08:30:43,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-01-19 08:30:43,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:43,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-01-19 08:30:43,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 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 08:30:43,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 08:30:43,169 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 08:30:43,169 INFO L186 Difference]: Start difference. First operand has 190 places, 328 transitions, 3650 flow. Second operand 22 states and 1451 transitions. [2022-01-19 08:30:43,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 482 transitions, 6693 flow [2022-01-19 08:30:43,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 482 transitions, 5998 flow, removed 232 selfloop flow, removed 11 redundant places. [2022-01-19 08:30:43,242 INFO L242 Difference]: Finished difference. Result has 209 places, 433 transitions, 5722 flow [2022-01-19 08:30:43,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5722, PETRI_PLACES=209, PETRI_TRANSITIONS=433} [2022-01-19 08:30:43,243 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 135 predicate places. [2022-01-19 08:30:43,243 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 433 transitions, 5722 flow [2022-01-19 08:30:43,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 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 08:30:43,243 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:43,244 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, 1, 1] [2022-01-19 08:30:43,261 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 08:30:43,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:43,447 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:43,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1139541701, now seen corresponding path program 5 times [2022-01-19 08:30:43,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:43,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664291793] [2022-01-19 08:30:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:43,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:43,661 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 08:30:43,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:43,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664291793] [2022-01-19 08:30:43,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664291793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:43,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933687838] [2022-01-19 08:30:43,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:30:43,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:43,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:43,676 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 08:30:43,677 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 08:30:43,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:30:43,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 08:30:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:30:43,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:30:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933687838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:44,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:44,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-01-19 08:30:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031235328] [2022-01-19 08:30:44,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:44,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:30:44,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:30:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:30:44,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:44,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 433 transitions, 5722 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 08:30:44,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:44,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:44,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:48,120 INFO L129 PetriNetUnfolder]: 744/2072 cut-off events. [2022-01-19 08:30:48,120 INFO L130 PetriNetUnfolder]: For 22908/22916 co-relation queries the response was YES. [2022-01-19 08:30:48,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 2072 events. 744/2072 cut-off events. For 22908/22916 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15157 event pairs, 13 based on Foata normal form. 26/2087 useless extension candidates. Maximal degree in co-relation 11614. Up to 464 conditions per place. [2022-01-19 08:30:48,195 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 125 selfloop transitions, 575 changer transitions 4/763 dead transitions. [2022-01-19 08:30:48,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 763 transitions, 12180 flow [2022-01-19 08:30:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 08:30:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 08:30:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5211 transitions. [2022-01-19 08:30:48,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7754464285714285 [2022-01-19 08:30:48,201 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5211 transitions. [2022-01-19 08:30:48,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5211 transitions. [2022-01-19 08:30:48,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:48,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5211 transitions. [2022-01-19 08:30:48,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 65.1375) internal successors, (5211), 80 states have internal predecessors, (5211), 0 states have call successors, (0), 0 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 08:30:48,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 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 08:30:48,221 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 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 08:30:48,221 INFO L186 Difference]: Start difference. First operand has 209 places, 433 transitions, 5722 flow. Second operand 80 states and 5211 transitions. [2022-01-19 08:30:48,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 763 transitions, 12180 flow [2022-01-19 08:30:48,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 763 transitions, 11762 flow, removed 201 selfloop flow, removed 3 redundant places. [2022-01-19 08:30:48,322 INFO L242 Difference]: Finished difference. Result has 295 places, 683 transitions, 10861 flow [2022-01-19 08:30:48,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=10861, PETRI_PLACES=295, PETRI_TRANSITIONS=683} [2022-01-19 08:30:48,325 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 221 predicate places. [2022-01-19 08:30:48,325 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 683 transitions, 10861 flow [2022-01-19 08:30:48,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 08:30:48,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:48,326 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, 1, 1] [2022-01-19 08:30:48,341 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 08:30:48,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:48,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash 115301975, now seen corresponding path program 6 times [2022-01-19 08:30:48,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:48,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188333854] [2022-01-19 08:30:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:48,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:48,649 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 08:30:48,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188333854] [2022-01-19 08:30:48,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188333854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144354934] [2022-01-19 08:30:48,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:30:48,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:48,651 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 08:30:48,651 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 08:30:48,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:30:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:30:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:48,920 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 08:30:48,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:49,448 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 08:30:49,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144354934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:49,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:49,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 08:30:49,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113961026] [2022-01-19 08:30:49,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:49,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:30:49,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:30:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:30:49,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:49,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 683 transitions, 10861 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 08:30:49,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:49,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:49,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:50,668 INFO L129 PetriNetUnfolder]: 893/2411 cut-off events. [2022-01-19 08:30:50,668 INFO L130 PetriNetUnfolder]: For 28464/28474 co-relation queries the response was YES. [2022-01-19 08:30:50,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15655 conditions, 2411 events. 893/2411 cut-off events. For 28464/28474 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18368 event pairs, 18 based on Foata normal form. 11/2409 useless extension candidates. Maximal degree in co-relation 15504. Up to 573 conditions per place. [2022-01-19 08:30:50,716 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 258 selfloop transitions, 535 changer transitions 3/855 dead transitions. [2022-01-19 08:30:50,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 855 transitions, 15612 flow [2022-01-19 08:30:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 08:30:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 08:30:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2022-01-19 08:30:50,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2022-01-19 08:30:50,719 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2022-01-19 08:30:50,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2022-01-19 08:30:50,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:50,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2022-01-19 08:30:50,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.14285714285714) internal successors, (2315), 35 states have internal predecessors, (2315), 0 states have call successors, (0), 0 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 08:30:50,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 08:30:50,724 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 08:30:50,725 INFO L186 Difference]: Start difference. First operand has 295 places, 683 transitions, 10861 flow. Second operand 35 states and 2315 transitions. [2022-01-19 08:30:50,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 855 transitions, 15612 flow [2022-01-19 08:30:50,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 855 transitions, 13786 flow, removed 797 selfloop flow, removed 13 redundant places. [2022-01-19 08:30:50,900 INFO L242 Difference]: Finished difference. Result has 324 places, 791 transitions, 13091 flow [2022-01-19 08:30:50,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9443, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13091, PETRI_PLACES=324, PETRI_TRANSITIONS=791} [2022-01-19 08:30:50,901 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 250 predicate places. [2022-01-19 08:30:50,901 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 791 transitions, 13091 flow [2022-01-19 08:30:50,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 08:30:50,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:50,902 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, 1, 1] [2022-01-19 08:30:50,917 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 08:30:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:51,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1392148443, now seen corresponding path program 7 times [2022-01-19 08:30:51,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862815550] [2022-01-19 08:30:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:51,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:51,264 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 08:30:51,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862815550] [2022-01-19 08:30:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862815550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:51,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734923769] [2022-01-19 08:30:51,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:30:51,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:51,266 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 08:30:51,267 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 08:30:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:51,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:30:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:51,554 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 08:30:51,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:51,994 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 08:30:51,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734923769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:51,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:51,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:30:51,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557220614] [2022-01-19 08:30:51,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:51,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:30:51,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:51,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:30:51,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:30:51,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:51,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 791 transitions, 13091 flow. Second operand has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 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 08:30:51,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:51,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:51,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:53,757 INFO L129 PetriNetUnfolder]: 1325/3751 cut-off events. [2022-01-19 08:30:53,757 INFO L130 PetriNetUnfolder]: For 38022/38032 co-relation queries the response was YES. [2022-01-19 08:30:53,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24373 conditions, 3751 events. 1325/3751 cut-off events. For 38022/38032 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 32178 event pairs, 26 based on Foata normal form. 42/3772 useless extension candidates. Maximal degree in co-relation 23940. Up to 842 conditions per place. [2022-01-19 08:30:53,797 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 307 selfloop transitions, 965 changer transitions 1/1332 dead transitions. [2022-01-19 08:30:53,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1332 transitions, 24881 flow [2022-01-19 08:30:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 08:30:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 08:30:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2724 transitions. [2022-01-19 08:30:53,800 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7909407665505227 [2022-01-19 08:30:53,800 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2724 transitions. [2022-01-19 08:30:53,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2724 transitions. [2022-01-19 08:30:53,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:53,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2724 transitions. [2022-01-19 08:30:53,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.4390243902439) internal successors, (2724), 41 states have internal predecessors, (2724), 0 states have call successors, (0), 0 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 08:30:53,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 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 08:30:53,806 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 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 08:30:53,806 INFO L186 Difference]: Start difference. First operand has 324 places, 791 transitions, 13091 flow. Second operand 41 states and 2724 transitions. [2022-01-19 08:30:53,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1332 transitions, 24881 flow [2022-01-19 08:30:54,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1332 transitions, 24531 flow, removed 76 selfloop flow, removed 13 redundant places. [2022-01-19 08:30:54,058 INFO L242 Difference]: Finished difference. Result has 366 places, 1202 transitions, 24247 flow [2022-01-19 08:30:54,059 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12841, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=24247, PETRI_PLACES=366, PETRI_TRANSITIONS=1202} [2022-01-19 08:30:54,059 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 292 predicate places. [2022-01-19 08:30:54,059 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 1202 transitions, 24247 flow [2022-01-19 08:30:54,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.47368421052632) internal successors, (1225), 19 states have internal predecessors, (1225), 0 states have call successors, (0), 0 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 08:30:54,060 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:30:54,060 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, 1, 1] [2022-01-19 08:30:54,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 08:30:54,275 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,SelfDestructingSolverStorable9 [2022-01-19 08:30:54,275 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:30:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:30:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1798251347, now seen corresponding path program 8 times [2022-01-19 08:30:54,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:30:54,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115823485] [2022-01-19 08:30:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:30:54,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:30:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:30:54,395 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 08:30:54,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:30:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115823485] [2022-01-19 08:30:54,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115823485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:30:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452263055] [2022-01-19 08:30:54,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:30:54,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:30:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:30:54,396 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 08:30:54,397 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 08:30:54,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:30:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:30:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:30:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:30:54,693 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 08:30:54,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:30:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:30:55,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452263055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:30:55,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:30:55,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 08:30:55,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007327617] [2022-01-19 08:30:55,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:30:55,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:30:55,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:30:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:30:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:30:55,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:30:55,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1202 transitions, 24247 flow. Second operand has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 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 08:30:55,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:30:55,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:30:55,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:30:59,353 INFO L129 PetriNetUnfolder]: 1730/5158 cut-off events. [2022-01-19 08:30:59,354 INFO L130 PetriNetUnfolder]: For 67516/67527 co-relation queries the response was YES. [2022-01-19 08:30:59,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36918 conditions, 5158 events. 1730/5158 cut-off events. For 67516/67527 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 48799 event pairs, 32 based on Foata normal form. 50/5185 useless extension candidates. Maximal degree in co-relation 36457. Up to 1021 conditions per place. [2022-01-19 08:30:59,410 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 290 selfloop transitions, 1430 changer transitions 1/1780 dead transitions. [2022-01-19 08:30:59,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1780 transitions, 38888 flow [2022-01-19 08:30:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 08:30:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 08:30:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4884 transitions. [2022-01-19 08:30:59,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-01-19 08:30:59,414 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4884 transitions. [2022-01-19 08:30:59,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4884 transitions. [2022-01-19 08:30:59,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:30:59,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4884 transitions. [2022-01-19 08:30:59,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 66.0) internal successors, (4884), 74 states have internal predecessors, (4884), 0 states have call successors, (0), 0 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 08:30:59,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 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 08:30:59,423 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 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 08:30:59,423 INFO L186 Difference]: Start difference. First operand has 366 places, 1202 transitions, 24247 flow. Second operand 74 states and 4884 transitions. [2022-01-19 08:30:59,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1780 transitions, 38888 flow [2022-01-19 08:31:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1780 transitions, 38263 flow, removed 281 selfloop flow, removed 6 redundant places. [2022-01-19 08:31:00,040 INFO L242 Difference]: Finished difference. Result has 456 places, 1692 transitions, 38936 flow [2022-01-19 08:31:00,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23841, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=996, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=38936, PETRI_PLACES=456, PETRI_TRANSITIONS=1692} [2022-01-19 08:31:00,041 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 382 predicate places. [2022-01-19 08:31:00,042 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 1692 transitions, 38936 flow [2022-01-19 08:31:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.61111111111111) internal successors, (1163), 18 states have internal predecessors, (1163), 0 states have call successors, (0), 0 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 08:31:00,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:31:00,042 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, 1, 1] [2022-01-19 08:31:00,059 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 08:31:00,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:31:00,242 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:31:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:31:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1780276453, now seen corresponding path program 9 times [2022-01-19 08:31:00,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:31:00,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800915495] [2022-01-19 08:31:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:31:00,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:31:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:31:00,351 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 08:31:00,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:31:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800915495] [2022-01-19 08:31:00,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800915495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:31:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491433483] [2022-01-19 08:31:00,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:31:00,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:31:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:31:00,352 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 08:31:00,353 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 08:31:00,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:31:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:31:00,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:31:00,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:31:00,619 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 08:31:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:31:00,929 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 08:31:00,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491433483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:31:00,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:31:00,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-19 08:31:00,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140172628] [2022-01-19 08:31:00,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:31:00,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:31:00,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:31:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:31:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:31:00,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:31:00,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1692 transitions, 38936 flow. Second operand has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 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 08:31:00,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:31:00,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:31:00,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:31:06,425 INFO L129 PetriNetUnfolder]: 2165/6901 cut-off events. [2022-01-19 08:31:06,425 INFO L130 PetriNetUnfolder]: For 109212/109246 co-relation queries the response was YES. [2022-01-19 08:31:06,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53927 conditions, 6901 events. 2165/6901 cut-off events. For 109212/109246 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71029 event pairs, 51 based on Foata normal form. 48/6919 useless extension candidates. Maximal degree in co-relation 53539. Up to 1270 conditions per place. [2022-01-19 08:31:06,520 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 341 selfloop transitions, 1813 changer transitions 6/2219 dead transitions. [2022-01-19 08:31:06,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2219 transitions, 55344 flow [2022-01-19 08:31:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 08:31:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 08:31:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4529 transitions. [2022-01-19 08:31:06,523 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7814009661835749 [2022-01-19 08:31:06,523 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4529 transitions. [2022-01-19 08:31:06,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4529 transitions. [2022-01-19 08:31:06,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:31:06,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4529 transitions. [2022-01-19 08:31:06,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.6376811594203) internal successors, (4529), 69 states have internal predecessors, (4529), 0 states have call successors, (0), 0 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 08:31:06,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 08:31:06,533 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 08:31:06,533 INFO L186 Difference]: Start difference. First operand has 456 places, 1692 transitions, 38936 flow. Second operand 69 states and 4529 transitions. [2022-01-19 08:31:06,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2219 transitions, 55344 flow [2022-01-19 08:31:08,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 2219 transitions, 54174 flow, removed 373 selfloop flow, removed 12 redundant places. [2022-01-19 08:31:08,132 INFO L242 Difference]: Finished difference. Result has 534 places, 2128 transitions, 55517 flow [2022-01-19 08:31:08,133 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=38095, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55517, PETRI_PLACES=534, PETRI_TRANSITIONS=2128} [2022-01-19 08:31:08,134 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 460 predicate places. [2022-01-19 08:31:08,134 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 2128 transitions, 55517 flow [2022-01-19 08:31:08,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 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 08:31:08,134 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:31:08,134 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, 1, 1] [2022-01-19 08:31:08,149 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 08:31:08,335 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,SelfDestructingSolverStorable11 [2022-01-19 08:31:08,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:31:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:31:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1526211693, now seen corresponding path program 10 times [2022-01-19 08:31:08,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:31:08,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898198776] [2022-01-19 08:31:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:31:08,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:31:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:31:08,429 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 08:31:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:31:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898198776] [2022-01-19 08:31:08,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898198776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:31:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181716803] [2022-01-19 08:31:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:31:08,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:31:08,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:31:08,430 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 08:31:08,431 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 08:31:08,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:31:08,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:31:08,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:31:08,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:31:08,678 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 08:31:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:31:09,257 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 08:31:09,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181716803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:31:09,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:31:09,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-01-19 08:31:09,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090118250] [2022-01-19 08:31:09,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:31:09,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:31:09,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:31:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:31:09,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:31:09,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:31:09,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2128 transitions, 55517 flow. Second operand has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 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 08:31:09,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:31:09,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:31:09,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:31:15,016 INFO L129 PetriNetUnfolder]: 2673/8808 cut-off events. [2022-01-19 08:31:15,016 INFO L130 PetriNetUnfolder]: For 160773/160807 co-relation queries the response was YES. [2022-01-19 08:31:15,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73863 conditions, 8808 events. 2673/8808 cut-off events. For 160773/160807 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 96294 event pairs, 49 based on Foata normal form. 47/8823 useless extension candidates. Maximal degree in co-relation 73549. Up to 1515 conditions per place. [2022-01-19 08:31:15,210 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 465 selfloop transitions, 2275 changer transitions 4/2803 dead transitions. [2022-01-19 08:31:15,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 2803 transitions, 78161 flow [2022-01-19 08:31:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 08:31:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 08:31:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3050 transitions. [2022-01-19 08:31:15,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893374741200828 [2022-01-19 08:31:15,213 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3050 transitions. [2022-01-19 08:31:15,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3050 transitions. [2022-01-19 08:31:15,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:31:15,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3050 transitions. [2022-01-19 08:31:15,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 66.30434782608695) internal successors, (3050), 46 states have internal predecessors, (3050), 0 states have call successors, (0), 0 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 08:31:15,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 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 08:31:15,219 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 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 08:31:15,219 INFO L186 Difference]: Start difference. First operand has 534 places, 2128 transitions, 55517 flow. Second operand 46 states and 3050 transitions. [2022-01-19 08:31:15,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 2803 transitions, 78161 flow [2022-01-19 08:31:18,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2803 transitions, 77665 flow, removed 93 selfloop flow, removed 27 redundant places. [2022-01-19 08:31:18,441 INFO L242 Difference]: Finished difference. Result has 563 places, 2696 transitions, 78965 flow [2022-01-19 08:31:18,443 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=55027, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=78965, PETRI_PLACES=563, PETRI_TRANSITIONS=2696} [2022-01-19 08:31:18,443 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 489 predicate places. [2022-01-19 08:31:18,443 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 2696 transitions, 78965 flow [2022-01-19 08:31:18,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.4) internal successors, (1288), 20 states have internal predecessors, (1288), 0 states have call successors, (0), 0 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 08:31:18,444 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:31:18,444 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, 1, 1] [2022-01-19 08:31:18,461 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 08:31:18,659 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,SelfDestructingSolverStorable12 [2022-01-19 08:31:18,659 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:31:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:31:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1865017427, now seen corresponding path program 11 times [2022-01-19 08:31:18,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:31:18,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941571817] [2022-01-19 08:31:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:31:18,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:31:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:31:18,740 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 08:31:18,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:31:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941571817] [2022-01-19 08:31:18,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941571817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:31:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560469405] [2022-01-19 08:31:18,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:31:18,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:31:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:31:18,742 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 08:31:18,743 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 08:31:18,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:31:18,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:31:18,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 08:31:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:31:18,965 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 08:31:18,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:31:19,325 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 08:31:19,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560469405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:31:19,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:31:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-01-19 08:31:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961253283] [2022-01-19 08:31:19,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:31:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:31:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:31:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:31:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:31:19,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:31:19,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2696 transitions, 78965 flow. Second operand has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 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 08:31:19,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:31:19,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:31:19,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:31:27,449 INFO L129 PetriNetUnfolder]: 2922/9768 cut-off events. [2022-01-19 08:31:27,449 INFO L130 PetriNetUnfolder]: For 227983/227996 co-relation queries the response was YES. [2022-01-19 08:31:27,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90562 conditions, 9768 events. 2922/9768 cut-off events. For 227983/227996 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 109936 event pairs, 204 based on Foata normal form. 65/9720 useless extension candidates. Maximal degree in co-relation 89656. Up to 1634 conditions per place. [2022-01-19 08:31:27,593 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 555 selfloop transitions, 2527 changer transitions 14/3155 dead transitions. [2022-01-19 08:31:27,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 3155 transitions, 98752 flow [2022-01-19 08:31:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 08:31:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 08:31:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3724 transitions. [2022-01-19 08:31:27,596 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-01-19 08:31:27,596 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3724 transitions. [2022-01-19 08:31:27,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3724 transitions. [2022-01-19 08:31:27,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:31:27,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3724 transitions. [2022-01-19 08:31:27,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.33333333333333) internal successors, (3724), 57 states have internal predecessors, (3724), 0 states have call successors, (0), 0 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 08:31:27,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 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 08:31:27,605 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 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 08:31:27,605 INFO L186 Difference]: Start difference. First operand has 563 places, 2696 transitions, 78965 flow. Second operand 57 states and 3724 transitions. [2022-01-19 08:31:27,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 3155 transitions, 98752 flow [2022-01-19 08:31:31,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 3155 transitions, 98007 flow, removed 204 selfloop flow, removed 19 redundant places. [2022-01-19 08:31:32,072 INFO L242 Difference]: Finished difference. Result has 612 places, 3077 transitions, 98324 flow [2022-01-19 08:31:32,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=77521, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=98324, PETRI_PLACES=612, PETRI_TRANSITIONS=3077} [2022-01-19 08:31:32,074 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 538 predicate places. [2022-01-19 08:31:32,074 INFO L470 AbstractCegarLoop]: Abstraction has has 612 places, 3077 transitions, 98324 flow [2022-01-19 08:31:32,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.05) internal successors, (1281), 20 states have internal predecessors, (1281), 0 states have call successors, (0), 0 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 08:31:32,075 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:31:32,075 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, 1, 1] [2022-01-19 08:31:32,091 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 08:31:32,275 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,SelfDestructingSolverStorable13 [2022-01-19 08:31:32,275 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:31:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:31:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1298955597, now seen corresponding path program 12 times [2022-01-19 08:31:32,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:31:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760643075] [2022-01-19 08:31:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:31:32,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:31:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:31:32,370 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 08:31:32,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:31:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760643075] [2022-01-19 08:31:32,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760643075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:31:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331877904] [2022-01-19 08:31:32,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:31:32,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:31:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:31:32,371 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 08:31:32,372 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 08:31:32,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:31:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:31:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:31:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:31:32,591 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 08:31:32,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:32:36,025 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 08:32:36,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331877904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:32:36,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:32:36,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-19 08:32:36,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523996202] [2022-01-19 08:32:36,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:32:36,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:32:36,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:32:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:32:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:32:36,027 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:32:36,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 3077 transitions, 98324 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 08:32:36,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:32:36,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:32:36,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:32:46,795 INFO L129 PetriNetUnfolder]: 2963/9964 cut-off events. [2022-01-19 08:32:46,795 INFO L130 PetriNetUnfolder]: For 269501/269524 co-relation queries the response was YES. [2022-01-19 08:32:46,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98782 conditions, 9964 events. 2963/9964 cut-off events. For 269501/269524 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 112512 event pairs, 51 based on Foata normal form. 21/9951 useless extension candidates. Maximal degree in co-relation 98062. Up to 1667 conditions per place. [2022-01-19 08:32:46,976 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 315 selfloop transitions, 2831 changer transitions 5/3210 dead transitions. [2022-01-19 08:32:46,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 3210 transitions, 108474 flow [2022-01-19 08:32:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 08:32:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 08:32:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3720 transitions. [2022-01-19 08:32:46,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7769423558897243 [2022-01-19 08:32:46,979 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3720 transitions. [2022-01-19 08:32:46,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3720 transitions. [2022-01-19 08:32:46,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:32:46,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3720 transitions. [2022-01-19 08:32:46,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.26315789473684) internal successors, (3720), 57 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 08:32:46,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 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 08:32:46,997 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 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 08:32:46,997 INFO L186 Difference]: Start difference. First operand has 612 places, 3077 transitions, 98324 flow. Second operand 57 states and 3720 transitions. [2022-01-19 08:32:46,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 3210 transitions, 108474 flow [2022-01-19 08:32:51,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 3210 transitions, 106468 flow, removed 229 selfloop flow, removed 19 redundant places. [2022-01-19 08:32:51,638 INFO L242 Difference]: Finished difference. Result has 656 places, 3181 transitions, 107916 flow [2022-01-19 08:32:51,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96063, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=107916, PETRI_PLACES=656, PETRI_TRANSITIONS=3181} [2022-01-19 08:32:51,640 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 582 predicate places. [2022-01-19 08:32:51,640 INFO L470 AbstractCegarLoop]: Abstraction has has 656 places, 3181 transitions, 107916 flow [2022-01-19 08:32:51,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 08:32:51,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:32:51,641 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, 1, 1] [2022-01-19 08:32:51,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-19 08:32:51,841 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,SelfDestructingSolverStorable14 [2022-01-19 08:32:51,841 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:32:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:32:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash -808919107, now seen corresponding path program 13 times [2022-01-19 08:32:51,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:32:51,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798931007] [2022-01-19 08:32:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:32:51,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:32:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:32:51,958 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 08:32:51,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:32:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798931007] [2022-01-19 08:32:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798931007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:32:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915805340] [2022-01-19 08:32:51,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:32:51,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:32:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:32:51,960 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 08:32:51,961 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 08:32:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:32:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:32:52,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:32:52,171 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 08:32:52,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:32:52,662 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 08:32:52,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915805340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:32:52,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:32:52,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-19 08:32:52,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620283403] [2022-01-19 08:32:52,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:32:52,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:32:52,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:32:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:32:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:32:52,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:32:52,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 3181 transitions, 107916 flow. Second operand has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 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 08:32:52,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:32:52,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:32:52,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:03,801 INFO L129 PetriNetUnfolder]: 3516/11658 cut-off events. [2022-01-19 08:33:03,802 INFO L130 PetriNetUnfolder]: For 335548/335572 co-relation queries the response was YES. [2022-01-19 08:33:03,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124079 conditions, 11658 events. 3516/11658 cut-off events. For 335548/335572 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 135553 event pairs, 62 based on Foata normal form. 113/11727 useless extension candidates. Maximal degree in co-relation 123132. Up to 1948 conditions per place. [2022-01-19 08:33:04,003 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 1013 selfloop transitions, 2861 changer transitions 5/3938 dead transitions. [2022-01-19 08:33:04,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 3938 transitions, 142554 flow [2022-01-19 08:33:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 08:33:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 08:33:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2805 transitions. [2022-01-19 08:33:04,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7950680272108843 [2022-01-19 08:33:04,005 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2805 transitions. [2022-01-19 08:33:04,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2805 transitions. [2022-01-19 08:33:04,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:04,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2805 transitions. [2022-01-19 08:33:04,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 66.78571428571429) internal successors, (2805), 42 states have internal predecessors, (2805), 0 states have call successors, (0), 0 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 08:33:04,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 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 08:33:04,011 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 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 08:33:04,011 INFO L186 Difference]: Start difference. First operand has 656 places, 3181 transitions, 107916 flow. Second operand 42 states and 2805 transitions. [2022-01-19 08:33:04,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 3938 transitions, 142554 flow [2022-01-19 08:33:11,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 3938 transitions, 140551 flow, removed 248 selfloop flow, removed 21 redundant places. [2022-01-19 08:33:11,113 INFO L242 Difference]: Finished difference. Result has 694 places, 3688 transitions, 136903 flow [2022-01-19 08:33:11,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=106019, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=136903, PETRI_PLACES=694, PETRI_TRANSITIONS=3688} [2022-01-19 08:33:11,115 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 620 predicate places. [2022-01-19 08:33:11,115 INFO L470 AbstractCegarLoop]: Abstraction has has 694 places, 3688 transitions, 136903 flow [2022-01-19 08:33:11,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 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 08:33:11,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:11,116 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, 1, 1] [2022-01-19 08:33:11,131 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 08:33:11,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:11,316 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash 525738553, now seen corresponding path program 14 times [2022-01-19 08:33:11,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:11,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130745540] [2022-01-19 08:33:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:11,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:11,401 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 08:33:11,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:11,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130745540] [2022-01-19 08:33:11,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130745540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:11,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758250259] [2022-01-19 08:33:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:33:11,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:11,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:11,403 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 08:33:11,404 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 08:33:11,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:33:11,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:33:11,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:33:11,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:11,635 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 08:33:11,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:12,148 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 08:33:12,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758250259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:12,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:12,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 08:33:12,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959661333] [2022-01-19 08:33:12,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:12,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:33:12,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:33:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:33:12,150 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:33:12,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 3688 transitions, 136903 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 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 08:33:12,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:12,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:33:12,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:24,589 INFO L129 PetriNetUnfolder]: 3558/11611 cut-off events. [2022-01-19 08:33:24,590 INFO L130 PetriNetUnfolder]: For 409108/409147 co-relation queries the response was YES. [2022-01-19 08:33:24,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133396 conditions, 11611 events. 3558/11611 cut-off events. For 409108/409147 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 134201 event pairs, 416 based on Foata normal form. 37/11481 useless extension candidates. Maximal degree in co-relation 132702. Up to 2926 conditions per place. [2022-01-19 08:33:24,806 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1368 selfloop transitions, 2377 changer transitions 5/3809 dead transitions. [2022-01-19 08:33:24,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3809 transitions, 148469 flow [2022-01-19 08:33:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-19 08:33:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-19 08:33:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1665 transitions. [2022-01-19 08:33:24,808 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-01-19 08:33:24,808 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1665 transitions. [2022-01-19 08:33:24,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1665 transitions. [2022-01-19 08:33:24,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:24,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1665 transitions. [2022-01-19 08:33:24,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.6) internal successors, (1665), 25 states have internal predecessors, (1665), 0 states have call successors, (0), 0 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 08:33:24,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 08:33:24,811 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 08:33:24,811 INFO L186 Difference]: Start difference. First operand has 694 places, 3688 transitions, 136903 flow. Second operand 25 states and 1665 transitions. [2022-01-19 08:33:24,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3809 transitions, 148469 flow [2022-01-19 08:33:33,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 3809 transitions, 146418 flow, removed 216 selfloop flow, removed 23 redundant places. [2022-01-19 08:33:33,968 INFO L242 Difference]: Finished difference. Result has 701 places, 3747 transitions, 146411 flow [2022-01-19 08:33:33,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=133464, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=146411, PETRI_PLACES=701, PETRI_TRANSITIONS=3747} [2022-01-19 08:33:33,971 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 627 predicate places. [2022-01-19 08:33:33,971 INFO L470 AbstractCegarLoop]: Abstraction has has 701 places, 3747 transitions, 146411 flow [2022-01-19 08:33:33,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 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 08:33:33,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:33,971 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, 1, 1] [2022-01-19 08:33:33,987 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 08:33:34,176 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,SelfDestructingSolverStorable16 [2022-01-19 08:33:34,176 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1708312077, now seen corresponding path program 15 times [2022-01-19 08:33:34,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:34,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940809534] [2022-01-19 08:33:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:34,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:34,267 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 08:33:34,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940809534] [2022-01-19 08:33:34,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940809534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036229131] [2022-01-19 08:33:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:33:34,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:34,268 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 08:33:34,269 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 08:33:34,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:33:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:33:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:33:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:34,515 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 08:33:34,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:33:35,041 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 08:33:35,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036229131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:33:35,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:33:35,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 08:33:35,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303946130] [2022-01-19 08:33:35,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:33:35,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:33:35,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:33:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:33:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:33:35,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:33:35,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 3747 transitions, 146411 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 08:33:35,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:33:35,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:33:35,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:33:48,768 INFO L129 PetriNetUnfolder]: 3874/12502 cut-off events. [2022-01-19 08:33:48,769 INFO L130 PetriNetUnfolder]: For 524695/524729 co-relation queries the response was YES. [2022-01-19 08:33:48,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151060 conditions, 12502 events. 3874/12502 cut-off events. For 524695/524729 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 145143 event pairs, 72 based on Foata normal form. 35/12474 useless extension candidates. Maximal degree in co-relation 150323. Up to 2165 conditions per place. [2022-01-19 08:33:49,068 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 783 selfloop transitions, 3355 changer transitions 16/4213 dead transitions. [2022-01-19 08:33:49,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 4213 transitions, 173478 flow [2022-01-19 08:33:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 08:33:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 08:33:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2556 transitions. [2022-01-19 08:33:49,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-01-19 08:33:49,071 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2556 transitions. [2022-01-19 08:33:49,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2556 transitions. [2022-01-19 08:33:49,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:33:49,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2556 transitions. [2022-01-19 08:33:49,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.53846153846153) internal successors, (2556), 39 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 08:33:49,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 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 08:33:49,076 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 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 08:33:49,076 INFO L186 Difference]: Start difference. First operand has 701 places, 3747 transitions, 146411 flow. Second operand 39 states and 2556 transitions. [2022-01-19 08:33:49,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 4213 transitions, 173478 flow [2022-01-19 08:33:59,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 4213 transitions, 173263 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-01-19 08:33:59,263 INFO L242 Difference]: Finished difference. Result has 739 places, 4180 transitions, 176716 flow [2022-01-19 08:33:59,266 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146152, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=176716, PETRI_PLACES=739, PETRI_TRANSITIONS=4180} [2022-01-19 08:33:59,266 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 665 predicate places. [2022-01-19 08:33:59,266 INFO L470 AbstractCegarLoop]: Abstraction has has 739 places, 4180 transitions, 176716 flow [2022-01-19 08:33:59,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 08:33:59,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:33:59,266 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, 1, 1] [2022-01-19 08:33:59,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 08:33:59,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 08:33:59,471 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:33:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:33:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -895646471, now seen corresponding path program 16 times [2022-01-19 08:33:59,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:33:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441496039] [2022-01-19 08:33:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:33:59,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:33:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:33:59,548 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 08:33:59,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:33:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441496039] [2022-01-19 08:33:59,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441496039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:33:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772840750] [2022-01-19 08:33:59,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:33:59,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:33:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:33:59,551 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 08:33:59,556 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 08:33:59,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:33:59,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:33:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:33:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:33:59,813 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 08:33:59,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:34:00,331 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 08:34:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772840750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:34:00,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:34:00,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-01-19 08:34:00,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004602675] [2022-01-19 08:34:00,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:34:00,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:34:00,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:34:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:34:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:34:00,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:34:00,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 4180 transitions, 176716 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 08:34:00,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:34:00,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:34:00,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:34:15,120 INFO L129 PetriNetUnfolder]: 3870/12213 cut-off events. [2022-01-19 08:34:15,120 INFO L130 PetriNetUnfolder]: For 583321/583336 co-relation queries the response was YES. [2022-01-19 08:34:15,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160432 conditions, 12213 events. 3870/12213 cut-off events. For 583321/583336 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 140105 event pairs, 258 based on Foata normal form. 18/12174 useless extension candidates. Maximal degree in co-relation 159991. Up to 2170 conditions per place. [2022-01-19 08:34:15,358 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1314 selfloop transitions, 2810 changer transitions 9/4192 dead transitions. [2022-01-19 08:34:15,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 4192 transitions, 185096 flow [2022-01-19 08:34:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 08:34:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 08:34:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1909 transitions. [2022-01-19 08:34:15,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836617405582923 [2022-01-19 08:34:15,360 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1909 transitions. [2022-01-19 08:34:15,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1909 transitions. [2022-01-19 08:34:15,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:34:15,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1909 transitions. [2022-01-19 08:34:15,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.82758620689656) internal successors, (1909), 29 states have internal predecessors, (1909), 0 states have call successors, (0), 0 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 08:34:15,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 08:34:15,363 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 08:34:15,364 INFO L186 Difference]: Start difference. First operand has 739 places, 4180 transitions, 176716 flow. Second operand 29 states and 1909 transitions. [2022-01-19 08:34:15,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 4192 transitions, 185096 flow [2022-01-19 08:34:26,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 4192 transitions, 182826 flow, removed 207 selfloop flow, removed 22 redundant places. [2022-01-19 08:34:26,875 INFO L242 Difference]: Finished difference. Result has 746 places, 4168 transitions, 182809 flow [2022-01-19 08:34:26,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=173918, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=182809, PETRI_PLACES=746, PETRI_TRANSITIONS=4168} [2022-01-19 08:34:26,878 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 672 predicate places. [2022-01-19 08:34:26,878 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 4168 transitions, 182809 flow [2022-01-19 08:34:26,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 08:34:26,878 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:34:26,878 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, 1, 1] [2022-01-19 08:34:26,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 08:34:27,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:27,088 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:34:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:34:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -918570207, now seen corresponding path program 17 times [2022-01-19 08:34:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:34:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921722745] [2022-01-19 08:34:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:34:27,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:34:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:34:27,192 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 08:34:27,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:34:27,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921722745] [2022-01-19 08:34:27,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921722745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:34:27,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408238118] [2022-01-19 08:34:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:34:27,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:34:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:34:27,195 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 08:34:27,197 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 08:34:27,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:34:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:34:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 08:34:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:34:27,419 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 08:34:27,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:34:27,714 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 08:34:27,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408238118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:34:27,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:34:27,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-01-19 08:34:27,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853102107] [2022-01-19 08:34:27,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:34:27,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:34:27,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:34:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:34:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:34:27,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:34:27,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 4168 transitions, 182809 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 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 08:34:27,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:34:27,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:34:27,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:34:47,697 INFO L129 PetriNetUnfolder]: 4098/13256 cut-off events. [2022-01-19 08:34:47,697 INFO L130 PetriNetUnfolder]: For 660788/660808 co-relation queries the response was YES. [2022-01-19 08:34:47,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176089 conditions, 13256 events. 4098/13256 cut-off events. For 660788/660808 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 156344 event pairs, 114 based on Foata normal form. 25/13256 useless extension candidates. Maximal degree in co-relation 175801. Up to 2289 conditions per place. [2022-01-19 08:34:47,969 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 902 selfloop transitions, 3573 changer transitions 6/4540 dead transitions. [2022-01-19 08:34:47,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 4540 transitions, 206005 flow [2022-01-19 08:34:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-19 08:34:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-01-19 08:34:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3604 transitions. [2022-01-19 08:34:47,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.78008658008658 [2022-01-19 08:34:47,972 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3604 transitions. [2022-01-19 08:34:47,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3604 transitions. [2022-01-19 08:34:47,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:34:47,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3604 transitions. [2022-01-19 08:34:47,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.52727272727273) internal successors, (3604), 55 states have internal predecessors, (3604), 0 states have call successors, (0), 0 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 08:34:47,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 08:34:47,977 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 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 08:34:47,977 INFO L186 Difference]: Start difference. First operand has 746 places, 4168 transitions, 182809 flow. Second operand 55 states and 3604 transitions. [2022-01-19 08:34:47,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 4540 transitions, 206005 flow [2022-01-19 08:35:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 4540 transitions, 204757 flow, removed 19 selfloop flow, removed 14 redundant places. [2022-01-19 08:35:01,254 INFO L242 Difference]: Finished difference. Result has 792 places, 4501 transitions, 206045 flow [2022-01-19 08:35:01,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=181644, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=206045, PETRI_PLACES=792, PETRI_TRANSITIONS=4501} [2022-01-19 08:35:01,257 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 718 predicate places. [2022-01-19 08:35:01,257 INFO L470 AbstractCegarLoop]: Abstraction has has 792 places, 4501 transitions, 206045 flow [2022-01-19 08:35:01,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 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 08:35:01,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:35:01,258 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, 1, 1] [2022-01-19 08:35:01,278 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 08:35:01,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:35:01,464 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:35:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:35:01,465 INFO L85 PathProgramCache]: Analyzing trace with hash -195799843, now seen corresponding path program 18 times [2022-01-19 08:35:01,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:35:01,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978064094] [2022-01-19 08:35:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:35:01,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:35:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:35:01,585 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 08:35:01,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:35:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978064094] [2022-01-19 08:35:01,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978064094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:35:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305633830] [2022-01-19 08:35:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:35:01,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:35:01,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:35:01,587 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 08:35:01,598 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 08:35:01,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:35:01,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:35:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:35:01,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:35:01,853 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 08:35:01,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:35:02,315 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 08:35:02,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305633830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:35:02,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:35:02,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-01-19 08:35:02,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753086366] [2022-01-19 08:35:02,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:35:02,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:35:02,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:35:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:35:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:35:02,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:35:02,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 4501 transitions, 206045 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 08:35:02,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:35:02,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:35:02,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:35:21,183 INFO L129 PetriNetUnfolder]: 4089/13177 cut-off events. [2022-01-19 08:35:21,183 INFO L130 PetriNetUnfolder]: For 720417/720448 co-relation queries the response was YES. [2022-01-19 08:35:21,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182902 conditions, 13177 events. 4089/13177 cut-off events. For 720417/720448 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 155136 event pairs, 270 based on Foata normal form. 27/13158 useless extension candidates. Maximal degree in co-relation 182317. Up to 2290 conditions per place. [2022-01-19 08:35:21,476 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 693 selfloop transitions, 3760 changer transitions 5/4517 dead transitions. [2022-01-19 08:35:21,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 4517 transitions, 215086 flow [2022-01-19 08:35:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 08:35:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 08:35:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-01-19 08:35:21,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-01-19 08:35:21,478 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-01-19 08:35:21,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-01-19 08:35:21,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:35:21,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-01-19 08:35:21,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 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 08:35:21,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 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 08:35:21,482 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 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 08:35:21,482 INFO L186 Difference]: Start difference. First operand has 792 places, 4501 transitions, 206045 flow. Second operand 40 states and 2634 transitions. [2022-01-19 08:35:21,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 4517 transitions, 215086 flow [2022-01-19 08:35:34,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 4517 transitions, 212636 flow, removed 464 selfloop flow, removed 21 redundant places. [2022-01-19 08:35:34,858 INFO L242 Difference]: Finished difference. Result has 807 places, 4493 transitions, 211990 flow [2022-01-19 08:35:34,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=203081, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=211990, PETRI_PLACES=807, PETRI_TRANSITIONS=4493} [2022-01-19 08:35:34,862 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 733 predicate places. [2022-01-19 08:35:34,862 INFO L470 AbstractCegarLoop]: Abstraction has has 807 places, 4493 transitions, 211990 flow [2022-01-19 08:35:34,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 08:35:34,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:35:34,862 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, 1, 1] [2022-01-19 08:35:34,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-19 08:35:35,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:35:35,063 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:35:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:35:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1867471673, now seen corresponding path program 19 times [2022-01-19 08:35:35,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:35:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164841878] [2022-01-19 08:35:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:35:35,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:35:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:35:35,241 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 08:35:35,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:35:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164841878] [2022-01-19 08:35:35,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164841878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:35:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310447182] [2022-01-19 08:35:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:35:35,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:35:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:35:35,244 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 08:35:35,244 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 08:35:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:35:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:35:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:35:35,521 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 08:35:35,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:36:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:36:10,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310447182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:36:10,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:36:10,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:36:10,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204095567] [2022-01-19 08:36:10,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:36:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:36:10,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:36:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:36:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:36:10,683 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:36:10,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 4493 transitions, 211990 flow. Second operand has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 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 08:36:10,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:36:10,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:36:10,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:36:31,358 INFO L129 PetriNetUnfolder]: 4422/14111 cut-off events. [2022-01-19 08:36:31,359 INFO L130 PetriNetUnfolder]: For 835285/835302 co-relation queries the response was YES. [2022-01-19 08:36:31,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203886 conditions, 14111 events. 4422/14111 cut-off events. For 835285/835302 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 166899 event pairs, 122 based on Foata normal form. 43/14111 useless extension candidates. Maximal degree in co-relation 203220. Up to 3982 conditions per place. [2022-01-19 08:36:31,705 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 1965 selfloop transitions, 2981 changer transitions 1/5006 dead transitions. [2022-01-19 08:36:31,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 5006 transitions, 246312 flow [2022-01-19 08:36:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 08:36:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 08:36:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2187 transitions. [2022-01-19 08:36:31,707 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.788961038961039 [2022-01-19 08:36:31,707 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2187 transitions. [2022-01-19 08:36:31,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2187 transitions. [2022-01-19 08:36:31,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:36:31,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2187 transitions. [2022-01-19 08:36:31,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 66.27272727272727) internal successors, (2187), 33 states have internal predecessors, (2187), 0 states have call successors, (0), 0 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 08:36:31,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 08:36:31,711 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 08:36:31,711 INFO L186 Difference]: Start difference. First operand has 807 places, 4493 transitions, 211990 flow. Second operand 33 states and 2187 transitions. [2022-01-19 08:36:31,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 5006 transitions, 246312 flow [2022-01-19 08:36:47,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 5006 transitions, 244124 flow, removed 243 selfloop flow, removed 22 redundant places. [2022-01-19 08:36:47,589 INFO L242 Difference]: Finished difference. Result has 834 places, 4838 transitions, 238973 flow [2022-01-19 08:36:47,592 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=209975, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=238973, PETRI_PLACES=834, PETRI_TRANSITIONS=4838} [2022-01-19 08:36:47,593 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 760 predicate places. [2022-01-19 08:36:47,593 INFO L470 AbstractCegarLoop]: Abstraction has has 834 places, 4838 transitions, 238973 flow [2022-01-19 08:36:47,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 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 08:36:47,593 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:36:47,593 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, 1, 1] [2022-01-19 08:36:47,609 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 08:36:47,793 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,SelfDestructingSolverStorable21 [2022-01-19 08:36:47,794 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:36:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:36:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1763869315, now seen corresponding path program 20 times [2022-01-19 08:36:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:36:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053346122] [2022-01-19 08:36:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:36:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:36:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:36:47,896 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 08:36:47,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:36:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053346122] [2022-01-19 08:36:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053346122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:36:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569748840] [2022-01-19 08:36:47,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:36:47,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:36:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:36:47,897 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 08:36:47,899 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 08:36:47,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:36:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:36:47,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:36:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:36:48,097 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 08:36:48,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:37:54,050 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 08:37:54,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569748840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:37:54,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:37:54,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:37:54,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716212872] [2022-01-19 08:37:54,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:37:54,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:37:54,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:37:54,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:37:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:37:54,052 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:37:54,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 4838 transitions, 238973 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 08:37:54,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:37:54,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:37:54,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:38:18,229 INFO L129 PetriNetUnfolder]: 4545/14305 cut-off events. [2022-01-19 08:38:18,230 INFO L130 PetriNetUnfolder]: For 956835/956844 co-relation queries the response was YES. [2022-01-19 08:38:18,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217723 conditions, 14305 events. 4545/14305 cut-off events. For 956835/956844 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 168770 event pairs, 405 based on Foata normal form. 15/14161 useless extension candidates. Maximal degree in co-relation 217371. Up to 3524 conditions per place. [2022-01-19 08:38:18,572 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2409 selfloop transitions, 2605 changer transitions 3/5076 dead transitions. [2022-01-19 08:38:18,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 5076 transitions, 261085 flow [2022-01-19 08:38:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 08:38:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 08:38:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1724 transitions. [2022-01-19 08:38:18,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7893772893772893 [2022-01-19 08:38:18,574 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1724 transitions. [2022-01-19 08:38:18,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1724 transitions. [2022-01-19 08:38:18,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:38:18,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1724 transitions. [2022-01-19 08:38:18,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.3076923076923) internal successors, (1724), 26 states have internal predecessors, (1724), 0 states have call successors, (0), 0 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 08:38:18,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 08:38:18,576 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 08:38:18,576 INFO L186 Difference]: Start difference. First operand has 834 places, 4838 transitions, 238973 flow. Second operand 26 states and 1724 transitions. [2022-01-19 08:38:18,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 5076 transitions, 261085 flow [2022-01-19 08:38:37,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 5076 transitions, 258908 flow, removed 687 selfloop flow, removed 10 redundant places. [2022-01-19 08:38:37,239 INFO L242 Difference]: Finished difference. Result has 862 places, 5016 transitions, 256405 flow [2022-01-19 08:38:37,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=236917, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=256405, PETRI_PLACES=862, PETRI_TRANSITIONS=5016} [2022-01-19 08:38:37,243 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 788 predicate places. [2022-01-19 08:38:37,243 INFO L470 AbstractCegarLoop]: Abstraction has has 862 places, 5016 transitions, 256405 flow [2022-01-19 08:38:37,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 08:38:37,243 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:38:37,243 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, 1, 1] [2022-01-19 08:38:37,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 08:38:37,461 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,SelfDestructingSolverStorable22 [2022-01-19 08:38:37,461 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:38:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:38:37,462 INFO L85 PathProgramCache]: Analyzing trace with hash 874884631, now seen corresponding path program 21 times [2022-01-19 08:38:37,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:38:37,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473293345] [2022-01-19 08:38:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:38:37,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:38:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:38:37,565 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 08:38:37,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:38:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473293345] [2022-01-19 08:38:37,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473293345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:38:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542975837] [2022-01-19 08:38:37,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:38:37,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:38:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:38:37,566 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 08:38:37,569 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 08:38:37,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:38:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:38:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:38:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:38:37,801 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 08:38:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:39:50,055 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 08:39:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542975837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:39:50,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:39:50,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:39:50,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274883827] [2022-01-19 08:39:50,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:39:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:39:50,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:39:50,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:39:50,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:39:50,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:39:50,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 5016 transitions, 256405 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 08:39:50,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:39:50,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:39:50,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:40:18,644 INFO L129 PetriNetUnfolder]: 4599/14509 cut-off events. [2022-01-19 08:40:18,644 INFO L130 PetriNetUnfolder]: For 1045706/1045710 co-relation queries the response was YES. [2022-01-19 08:40:18,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226415 conditions, 14509 events. 4599/14509 cut-off events. For 1045706/1045710 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 171502 event pairs, 246 based on Foata normal form. 12/14483 useless extension candidates. Maximal degree in co-relation 226186. Up to 2859 conditions per place. [2022-01-19 08:40:19,139 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1136 selfloop transitions, 4018 changer transitions 3/5216 dead transitions. [2022-01-19 08:40:19,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 5216 transitions, 275776 flow [2022-01-19 08:40:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 08:40:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 08:40:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3275 transitions. [2022-01-19 08:40:19,142 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-01-19 08:40:19,142 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3275 transitions. [2022-01-19 08:40:19,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3275 transitions. [2022-01-19 08:40:19,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:40:19,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3275 transitions. [2022-01-19 08:40:19,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 65.5) internal successors, (3275), 50 states have internal predecessors, (3275), 0 states have call successors, (0), 0 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 08:40:19,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 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 08:40:19,147 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 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 08:40:19,147 INFO L186 Difference]: Start difference. First operand has 862 places, 5016 transitions, 256405 flow. Second operand 50 states and 3275 transitions. [2022-01-19 08:40:19,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 5216 transitions, 275776 flow [2022-01-19 08:40:39,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 5216 transitions, 275344 flow, removed 92 selfloop flow, removed 8 redundant places. [2022-01-19 08:40:39,817 INFO L242 Difference]: Finished difference. Result has 916 places, 5161 transitions, 277780 flow [2022-01-19 08:40:39,820 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=255854, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=277780, PETRI_PLACES=916, PETRI_TRANSITIONS=5161} [2022-01-19 08:40:39,821 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 842 predicate places. [2022-01-19 08:40:39,821 INFO L470 AbstractCegarLoop]: Abstraction has has 916 places, 5161 transitions, 277780 flow [2022-01-19 08:40:39,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 08:40:39,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:40:39,821 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, 1, 1] [2022-01-19 08:40:39,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 08:40:40,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:40:40,027 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:40:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:40:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1198734987, now seen corresponding path program 22 times [2022-01-19 08:40:40,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:40:40,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945491585] [2022-01-19 08:40:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:40:40,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:40:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:40:40,141 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 08:40:40,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:40:40,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945491585] [2022-01-19 08:40:40,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945491585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:40:40,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835187433] [2022-01-19 08:40:40,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:40:40,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:40:40,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:40:40,143 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 08:40:40,144 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 08:40:40,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:40:40,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:40:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:40:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:40:40,392 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 08:40:40,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:41:52,572 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 08:41:52,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835187433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:41:52,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:41:52,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:41:52,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815580829] [2022-01-19 08:41:52,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:41:52,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:41:52,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:41:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:41:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:41:52,573 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:41:52,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 5161 transitions, 277780 flow. Second operand has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 08:41:52,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:41:52,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:41:52,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:19,401 INFO L129 PetriNetUnfolder]: 4634/14599 cut-off events. [2022-01-19 08:42:19,401 INFO L130 PetriNetUnfolder]: For 1167957/1167971 co-relation queries the response was YES. [2022-01-19 08:42:19,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238880 conditions, 14599 events. 4634/14599 cut-off events. For 1167957/1167971 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 172769 event pairs, 262 based on Foata normal form. 9/14557 useless extension candidates. Maximal degree in co-relation 238638. Up to 3496 conditions per place. [2022-01-19 08:42:19,767 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1868 selfloop transitions, 3315 changer transitions 3/5245 dead transitions. [2022-01-19 08:42:19,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 5245 transitions, 291662 flow [2022-01-19 08:42:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 08:42:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 08:42:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2425 transitions. [2022-01-19 08:42:19,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802445302445302 [2022-01-19 08:42:19,769 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2425 transitions. [2022-01-19 08:42:19,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2425 transitions. [2022-01-19 08:42:19,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:19,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2425 transitions. [2022-01-19 08:42:19,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.54054054054055) internal successors, (2425), 37 states have internal predecessors, (2425), 0 states have call successors, (0), 0 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 08:42:19,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 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 08:42:19,773 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 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 08:42:19,773 INFO L186 Difference]: Start difference. First operand has 916 places, 5161 transitions, 277780 flow. Second operand 37 states and 2425 transitions. [2022-01-19 08:42:19,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 5245 transitions, 291662 flow [2022-01-19 08:42:41,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 5245 transitions, 291094 flow, removed 147 selfloop flow, removed 14 redundant places. [2022-01-19 08:42:41,454 INFO L242 Difference]: Finished difference. Result has 948 places, 5214 transitions, 291480 flow [2022-01-19 08:42:41,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=277248, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=291480, PETRI_PLACES=948, PETRI_TRANSITIONS=5214} [2022-01-19 08:42:41,458 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 874 predicate places. [2022-01-19 08:42:41,458 INFO L470 AbstractCegarLoop]: Abstraction has has 948 places, 5214 transitions, 291480 flow [2022-01-19 08:42:41,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 08:42:41,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:41,458 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, 1, 1] [2022-01-19 08:42:41,478 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 08:42:41,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:41,659 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:42:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash -478409363, now seen corresponding path program 23 times [2022-01-19 08:42:41,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:41,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951131825] [2022-01-19 08:42:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:41,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:41,742 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 08:42:41,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951131825] [2022-01-19 08:42:41,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951131825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:42:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986048081] [2022-01-19 08:42:41,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:42:41,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:41,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:42:41,744 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 08:42:41,744 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 08:42:41,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:42:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:42:41,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 08:42:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:42:41,963 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 08:42:41,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:43:00,554 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 08:43:00,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986048081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:43:00,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:43:00,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:43:00,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624456428] [2022-01-19 08:43:00,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:43:00,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:43:00,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:43:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:43:00,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-01-19 08:43:00,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 948 places, 5214 transitions, 291480 flow. Second operand has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 08:43:00,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:00,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-01-19 08:43:00,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:30,215 INFO L129 PetriNetUnfolder]: 4632/14596 cut-off events. [2022-01-19 08:43:30,215 INFO L130 PetriNetUnfolder]: For 1288676/1288689 co-relation queries the response was YES. [2022-01-19 08:43:30,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246990 conditions, 14596 events. 4632/14596 cut-off events. For 1288676/1288689 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 172711 event pairs, 267 based on Foata normal form. 4/14555 useless extension candidates. Maximal degree in co-relation 246737. Up to 3821 conditions per place. [2022-01-19 08:43:30,721 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2220 selfloop transitions, 2947 changer transitions 4/5230 dead transitions. [2022-01-19 08:43:30,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 5230 transitions, 302136 flow [2022-01-19 08:43:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 08:43:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 08:43:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1189 transitions. [2022-01-19 08:43:30,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7863756613756614 [2022-01-19 08:43:30,722 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1189 transitions. [2022-01-19 08:43:30,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1189 transitions. [2022-01-19 08:43:30,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:30,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1189 transitions. [2022-01-19 08:43:30,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.05555555555556) internal successors, (1189), 18 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 08:43:30,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 08:43:30,725 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 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 08:43:30,725 INFO L186 Difference]: Start difference. First operand has 948 places, 5214 transitions, 291480 flow. Second operand 18 states and 1189 transitions. [2022-01-19 08:43:30,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 5230 transitions, 302136 flow [2022-01-19 08:43:55,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 5230 transitions, 300577 flow, removed 117 selfloop flow, removed 20 redundant places. [2022-01-19 08:43:55,266 INFO L242 Difference]: Finished difference. Result has 944 places, 5208 transitions, 299122 flow [2022-01-19 08:43:55,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=289720, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=299122, PETRI_PLACES=944, PETRI_TRANSITIONS=5208} [2022-01-19 08:43:55,270 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 870 predicate places. [2022-01-19 08:43:55,270 INFO L470 AbstractCegarLoop]: Abstraction has has 944 places, 5208 transitions, 299122 flow [2022-01-19 08:43:55,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.8421052631579) internal successors, (1213), 19 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 08:43:55,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:55,270 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, 1, 1] [2022-01-19 08:43:55,286 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 08:43:55,471 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,SelfDestructingSolverStorable25 [2022-01-19 08:43:55,472 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:43:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1627337661, now seen corresponding path program 24 times [2022-01-19 08:43:55,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541149308] [2022-01-19 08:43:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:55,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:55,766 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 08:43:55,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541149308] [2022-01-19 08:43:55,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541149308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:43:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258160658] [2022-01-19 08:43:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:43:55,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:43:55,768 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 08:43:55,768 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 08:43:55,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:43:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:43:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 08:43:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:43:56,084 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 08:43:56,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:43:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258160658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:43:57,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:43:57,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 24 [2022-01-19 08:43:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141287218] [2022-01-19 08:43:57,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:43:57,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 08:43:57,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 08:43:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-19 08:43:57,766 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2022-01-19 08:43:57,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 5208 transitions, 299122 flow. Second operand has 24 states, 24 states have (on average 52.25) internal successors, (1254), 24 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 08:43:57,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:57,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2022-01-19 08:43:57,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 08:44:41,745 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:44:41,781 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 08:44:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 08:44:42,125 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:44:42,147 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 08:44:42,326 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,SelfDestructingSolverStorable26 [2022-01-19 08:44:42,326 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 326387 conditions, 15393 events (5722/15392 cut-off events. For 1946558/1946558 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 189703 event pairs, 206 based on Foata normal form. 0/16496 useless extension candidates. Maximal degree in co-relation 326133. Up to 3505 conditions per place.). [2022-01-19 08:44:42,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:44:42,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:44:42,330 INFO L732 BasicCegarLoop]: Path program histogram: [24, 2, 1] [2022-01-19 08:44:42,332 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:44:42,332 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:44:42,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:44:42 BasicIcfg [2022-01-19 08:44:42,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:44:42,334 INFO L158 Benchmark]: Toolchain (without parser) took 847448.32ms. Allocated memory was 408.9MB in the beginning and 4.2GB in the end (delta: 3.8GB). Free memory was 351.0MB in the beginning and 2.3GB in the end (delta: -1.9GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2022-01-19 08:44:42,334 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 408.9MB. Free memory is still 368.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:44:42,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.94ms. Allocated memory was 408.9MB in the beginning and 589.3MB in the end (delta: 180.4MB). Free memory was 350.7MB in the beginning and 558.8MB in the end (delta: -208.1MB). Peak memory consumption was 6.7MB. Max. memory is 16.0GB. [2022-01-19 08:44:42,334 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.97ms. Allocated memory is still 589.3MB. Free memory was 558.8MB in the beginning and 556.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:44:42,334 INFO L158 Benchmark]: Boogie Preprocessor took 29.64ms. Allocated memory is still 589.3MB. Free memory was 556.7MB in the beginning and 555.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:44:42,335 INFO L158 Benchmark]: RCFGBuilder took 337.08ms. Allocated memory is still 589.3MB. Free memory was 555.7MB in the beginning and 538.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 08:44:42,335 INFO L158 Benchmark]: TraceAbstraction took 846851.27ms. Allocated memory was 589.3MB in the beginning and 4.2GB in the end (delta: 3.6GB). Free memory was 538.9MB in the beginning and 2.3GB in the end (delta: -1.7GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2022-01-19 08:44:42,336 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 408.9MB. Free memory is still 368.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 195.94ms. Allocated memory was 408.9MB in the beginning and 589.3MB in the end (delta: 180.4MB). Free memory was 350.7MB in the beginning and 558.8MB in the end (delta: -208.1MB). Peak memory consumption was 6.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.97ms. Allocated memory is still 589.3MB. Free memory was 558.8MB in the beginning and 556.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.64ms. Allocated memory is still 589.3MB. Free memory was 556.7MB in the beginning and 555.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 337.08ms. Allocated memory is still 589.3MB. Free memory was 555.7MB in the beginning and 538.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 846851.27ms. Allocated memory was 589.3MB in the beginning and 4.2GB in the end (delta: 3.6GB). Free memory was 538.9MB in the beginning and 2.3GB in the end (delta: -1.7GB). Peak memory consumption was 3.5GB. 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: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 326387 conditions, 15393 events (5722/15392 cut-off events. For 1946558/1946558 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 189703 event pairs, 206 based on Foata normal form. 0/16496 useless extension candidates. Maximal degree in co-relation 326133. Up to 3505 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 (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 326387 conditions, 15393 events (5722/15392 cut-off events. For 1946558/1946558 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 189703 event pairs, 206 based on Foata normal form. 0/16496 useless extension candidates. Maximal degree in co-relation 326133. Up to 3505 conditions per place.). - TimeoutResultAtElement [Line: 73]: 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 (24states, 49/84 universal loopers) in iteration 27,while PetriNetUnfolder was constructing finite prefix that currently has 326387 conditions, 15393 events (5722/15392 cut-off events. For 1946558/1946558 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 189703 event pairs, 206 based on Foata normal form. 0/16496 useless extension candidates. Maximal degree in co-relation 326133. Up to 3505 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 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: 846.7s, OverallIterations: 27, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 494.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2991 SdHoareTripleChecker+Valid, 10.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2991 mSDsluCounter, 2393 SdHoareTripleChecker+Invalid, 8.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3283 mSDsCounter, 1358 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11511 IncrementalHoareTripleChecker+Invalid, 12869 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1358 mSolverCounterUnsat, 494 mSDtfsCounter, 11511 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4455 GetRequests, 3293 SyntacticMatches, 34 SemanticMatches, 1128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18532 ImplicationChecksByTransitivity, 29.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=299122occurred in iteration=26, InterpolantAutomatonStates: 972, 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 344.6s InterpolantComputationTime, 3696 NumberOfCodeBlocks, 3531 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 5345 ConstructedInterpolants, 0 QuantifiedInterpolants, 27080 SizeOfPredicates, 267 NumberOfNonLiveVariables, 3568 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 76 InterpolantComputations, 3 PerfectInterpolantSequences, 334/570 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