/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.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 02:23:41,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:23:41,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:23:41,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:23:41,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:23:41,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:23:41,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:23:41,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:23:41,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:23:41,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:23:41,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:23:41,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:23:41,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:23:41,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:23:41,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:23:41,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:23:41,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:23:41,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:23:41,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:23:41,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:23:41,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:23:41,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:23:41,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:23:41,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:23:41,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:23:41,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:23:41,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:23:41,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:23:41,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:23:41,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:23:41,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:23:41,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:23:41,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:23:41,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:23:41,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:23:41,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:23:41,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:23:41,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:23:41,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:23:41,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:23:41,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:23:41,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-01-19 02:23:41,947 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:23:41,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:23:41,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:23:41,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:23:41,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:23:41,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:23:41,948 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:23:41,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:23:41,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:23:41,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:23:41,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:23:41,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:23:41,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:23:41,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:23:41,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:23:42,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:23:42,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:23:42,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:23:42,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:23:42,158 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:23:42,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-01-19 02:23:42,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78eb4094/b2fae3adbddd432f90dcca8e032270a1/FLAGf7791e3ec [2022-01-19 02:23:42,573 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:23:42,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-01-19 02:23:42,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78eb4094/b2fae3adbddd432f90dcca8e032270a1/FLAGf7791e3ec [2022-01-19 02:23:42,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78eb4094/b2fae3adbddd432f90dcca8e032270a1 [2022-01-19 02:23:42,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:23:42,588 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:23:42,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:23:42,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:23:42,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:23:42,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9bb808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42, skipping insertion in model container [2022-01-19 02:23:42,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:23:42,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:23:42,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-01-19 02:23:42,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:23:42,738 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:23:42,749 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-01-19 02:23:42,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:23:42,757 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:23:42,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42 WrapperNode [2022-01-19 02:23:42,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:23:42,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:23:42,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:23:42,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:23:42,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,778 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-01-19 02:23:42,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:23:42,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:23:42,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:23:42,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:23:42,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:23:42,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:23:42,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:23:42,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:23:42,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (1/1) ... [2022-01-19 02:23:42,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:23:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:42,814 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 02:23:42,824 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 02:23:42,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:23:42,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:23:42,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:23:42,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:23:42,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:23:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:23:42,844 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 02:23:42,891 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:23:42,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:23:42,986 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:23:43,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:23:43,010 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 02:23:43,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:23:43 BoogieIcfgContainer [2022-01-19 02:23:43,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:23:43,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:23:43,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:23:43,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:23:43,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:23:42" (1/3) ... [2022-01-19 02:23:43,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1645b391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:23:43, skipping insertion in model container [2022-01-19 02:23:43,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:23:42" (2/3) ... [2022-01-19 02:23:43,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1645b391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:23:43, skipping insertion in model container [2022-01-19 02:23:43,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:23:43" (3/3) ... [2022-01-19 02:23:43,016 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-01-19 02:23:43,019 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:23:43,019 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:23:43,020 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:23:43,077 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,078 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,078 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,078 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,078 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,079 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,080 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,081 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,082 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,082 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,082 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,082 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,084 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,084 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,088 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:23:43,092 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 02:23:43,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:23:43,137 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 02:23:43,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 02:23:43,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-01-19 02:23:43,170 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-01-19 02:23:43,170 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:23:43,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-01-19 02:23:43,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-01-19 02:23:43,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-01-19 02:23:43,187 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2022-01-19 02:23:43,188 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:23:43,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:43,188 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:43,189 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1700112450, now seen corresponding path program 1 times [2022-01-19 02:23:43,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:43,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269759322] [2022-01-19 02:23:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:43,322 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 02:23:43,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:43,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269759322] [2022-01-19 02:23:43,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269759322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:23:43,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:23:43,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 02:23:43,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096156866] [2022-01-19 02:23:43,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:23:43,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 02:23:43,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 02:23:43,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 02:23:43,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-01-19 02:23:43,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:43,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-01-19 02:23:43,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:43,380 INFO L129 PetriNetUnfolder]: 10/93 cut-off events. [2022-01-19 02:23:43,380 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-01-19 02:23:43,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-01-19 02:23:43,382 INFO L132 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-01-19 02:23:43,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-01-19 02:23:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 02:23:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 02:23:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-01-19 02:23:43,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-01-19 02:23:43,390 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-01-19 02:23:43,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-01-19 02:23:43,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:43,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-01-19 02:23:43,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,397 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,398 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-01-19 02:23:43,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-01-19 02:23:43,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:23:43,402 INFO L242 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-01-19 02:23:43,403 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-01-19 02:23:43,406 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-01-19 02:23:43,406 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-01-19 02:23:43,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:43,406 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:43,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:23:43,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:43,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-01-19 02:23:43,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:43,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111569301] [2022-01-19 02:23:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:43,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:43,581 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 02:23:43,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111569301] [2022-01-19 02:23:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111569301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:23:43,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:23:43,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:23:43,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703494086] [2022-01-19 02:23:43,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:23:43,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:23:43,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:23:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:23:43,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-01-19 02:23:43,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:43,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-01-19 02:23:43,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:43,663 INFO L129 PetriNetUnfolder]: 64/183 cut-off events. [2022-01-19 02:23:43,663 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-01-19 02:23:43,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-01-19 02:23:43,667 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-01-19 02:23:43,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-01-19 02:23:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:23:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:23:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-01-19 02:23:43,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-01-19 02:23:43,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-01-19 02:23:43,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-01-19 02:23:43,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:43,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-01-19 02:23:43,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,677 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,677 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-01-19 02:23:43,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-01-19 02:23:43,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 02:23:43,679 INFO L242 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-01-19 02:23:43,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-01-19 02:23:43,680 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-01-19 02:23:43,680 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-01-19 02:23:43,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:43,680 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:43,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:23:43,681 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2022-01-19 02:23:43,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803346357] [2022-01-19 02:23:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:43,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:43,743 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 02:23:43,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803346357] [2022-01-19 02:23:43,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803346357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:23:43,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:23:43,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:23:43,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17964210] [2022-01-19 02:23:43,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:23:43,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:23:43,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:23:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:23:43,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 02:23:43,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:43,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 02:23:43,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:43,809 INFO L129 PetriNetUnfolder]: 87/283 cut-off events. [2022-01-19 02:23:43,809 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-01-19 02:23:43,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 37 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-01-19 02:23:43,811 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-01-19 02:23:43,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-01-19 02:23:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:23:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:23:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-01-19 02:23:43,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-01-19 02:23:43,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-01-19 02:23:43,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-01-19 02:23:43,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:43,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-01-19 02:23:43,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,815 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,815 INFO L186 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-01-19 02:23:43,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-01-19 02:23:43,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:23:43,817 INFO L242 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-01-19 02:23:43,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-01-19 02:23:43,817 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-01-19 02:23:43,817 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-01-19 02:23:43,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:43,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:43,818 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:43,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 02:23:43,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1801956563, now seen corresponding path program 2 times [2022-01-19 02:23:43,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:43,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127987904] [2022-01-19 02:23:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:43,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:43,871 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 02:23:43,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:43,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127987904] [2022-01-19 02:23:43,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127987904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:43,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243845409] [2022-01-19 02:23:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:23:43,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:43,873 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 02:23:43,874 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 02:23:43,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-19 02:23:43,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 02:23:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:44,086 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 02:23:44,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:23:44,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243845409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:23:44,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:23:44,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-01-19 02:23:44,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388774328] [2022-01-19 02:23:44,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:23:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:23:44,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:23:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-19 02:23:44,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-01-19 02:23:44,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:44,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:44,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-01-19 02:23:44,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:44,185 INFO L129 PetriNetUnfolder]: 44/166 cut-off events. [2022-01-19 02:23:44,186 INFO L130 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-01-19 02:23:44,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 530 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-01-19 02:23:44,187 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-01-19 02:23:44,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-01-19 02:23:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 02:23:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 02:23:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-01-19 02:23:44,189 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-01-19 02:23:44,189 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-01-19 02:23:44,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-01-19 02:23:44,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:44,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-01-19 02:23:44,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:44,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:44,192 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:44,192 INFO L186 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-01-19 02:23:44,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-01-19 02:23:44,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-01-19 02:23:44,194 INFO L242 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-01-19 02:23:44,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-01-19 02:23:44,195 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-01-19 02:23:44,195 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-01-19 02:23:44,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:44,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:44,195 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:44,212 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 02:23:44,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:44,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1474269123, now seen corresponding path program 1 times [2022-01-19 02:23:44,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026235927] [2022-01-19 02:23:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:44,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:44,532 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 02:23:44,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:44,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026235927] [2022-01-19 02:23:44,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026235927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:44,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124118802] [2022-01-19 02:23:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:44,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:44,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:44,535 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 02:23:44,536 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 02:23:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 02:23:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:44,703 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 02:23:44,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:23:45,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124118802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:45,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:45,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-01-19 02:23:45,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803988577] [2022-01-19 02:23:45,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:45,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 02:23:45,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 02:23:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-19 02:23:45,095 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 02:23:45,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:45,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 02:23:45,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:45,159 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2022-01-19 02:23:45,159 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-01-19 02:23:45,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 427 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-01-19 02:23:45,161 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-01-19 02:23:45,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-01-19 02:23:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:23:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:23:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-01-19 02:23:45,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-01-19 02:23:45,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-01-19 02:23:45,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-01-19 02:23:45,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:45,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-01-19 02:23:45,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,164 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,164 INFO L186 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-01-19 02:23:45,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-01-19 02:23:45,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 02:23:45,168 INFO L242 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-01-19 02:23:45,170 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-01-19 02:23:45,172 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-01-19 02:23:45,176 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-01-19 02:23:45,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:45,177 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:45,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 02:23:45,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:45,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2022-01-19 02:23:45,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328064735] [2022-01-19 02:23:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:45,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:45,430 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 02:23:45,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328064735] [2022-01-19 02:23:45,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328064735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:45,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632691621] [2022-01-19 02:23:45,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:23:45,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:45,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:45,432 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 02:23:45,433 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 02:23:45,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:23:45,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 02:23:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:45,612 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 02:23:45,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:45,756 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 02:23:45,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632691621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:45,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:45,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-01-19 02:23:45,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295140042] [2022-01-19 02:23:45,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:45,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 02:23:45,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:45,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 02:23:45,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 02:23:45,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-01-19 02:23:45,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:45,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-01-19 02:23:45,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:45,854 INFO L129 PetriNetUnfolder]: 109/370 cut-off events. [2022-01-19 02:23:45,855 INFO L130 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2022-01-19 02:23:45,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1754 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2022-01-19 02:23:45,857 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-01-19 02:23:45,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-01-19 02:23:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 02:23:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 02:23:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-01-19 02:23:45,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-01-19 02:23:45,859 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-01-19 02:23:45,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-01-19 02:23:45,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:45,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-01-19 02:23:45,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,861 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,861 INFO L186 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-01-19 02:23:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-01-19 02:23:45,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 02:23:45,864 INFO L242 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-01-19 02:23:45,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-01-19 02:23:45,866 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-01-19 02:23:45,866 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-01-19 02:23:45,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:45,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:45,866 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:45,883 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 02:23:46,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:46,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2134643199, now seen corresponding path program 3 times [2022-01-19 02:23:46,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:46,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355327798] [2022-01-19 02:23:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:46,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:46,166 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 02:23:46,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:46,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355327798] [2022-01-19 02:23:46,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355327798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:46,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948776329] [2022-01-19 02:23:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:23:46,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:46,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:46,168 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 02:23:46,169 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 02:23:46,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:23:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:23:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:23:46,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:46,564 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 02:23:46,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948776329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:46,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:46,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-19 02:23:46,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313792672] [2022-01-19 02:23:46,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:46,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:23:46,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:23:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:23:46,567 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:46,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:46,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:46,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:46,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:47,886 INFO L129 PetriNetUnfolder]: 341/932 cut-off events. [2022-01-19 02:23:47,886 INFO L130 PetriNetUnfolder]: For 1529/1529 co-relation queries the response was YES. [2022-01-19 02:23:47,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 932 events. 341/932 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5212 event pairs, 6 based on Foata normal form. 29/961 useless extension candidates. Maximal degree in co-relation 2743. Up to 175 conditions per place. [2022-01-19 02:23:47,892 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 126 selfloop transitions, 180 changer transitions 9/360 dead transitions. [2022-01-19 02:23:47,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 360 transitions, 2526 flow [2022-01-19 02:23:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 02:23:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 02:23:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4205 transitions. [2022-01-19 02:23:47,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7431954754330152 [2022-01-19 02:23:47,898 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4205 transitions. [2022-01-19 02:23:47,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4205 transitions. [2022-01-19 02:23:47,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:47,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4205 transitions. [2022-01-19 02:23:47,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 60.94202898550725) internal successors, (4205), 69 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:47,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:47,912 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 82.0) internal successors, (5740), 70 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:47,912 INFO L186 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 69 states and 4205 transitions. [2022-01-19 02:23:47,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 360 transitions, 2526 flow [2022-01-19 02:23:47,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 360 transitions, 2514 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 02:23:47,920 INFO L242 Difference]: Finished difference. Result has 191 places, 245 transitions, 1966 flow [2022-01-19 02:23:47,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1966, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2022-01-19 02:23:47,920 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 119 predicate places. [2022-01-19 02:23:47,920 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 1966 flow [2022-01-19 02:23:47,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:47,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:47,921 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:47,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 02:23:48,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:48,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1525353727, now seen corresponding path program 4 times [2022-01-19 02:23:48,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:48,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556150823] [2022-01-19 02:23:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:48,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:48,231 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 02:23:48,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556150823] [2022-01-19 02:23:48,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556150823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561636153] [2022-01-19 02:23:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:23:48,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:48,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:48,234 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 02:23:48,236 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 02:23:48,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:23:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 02:23:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:23:48,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:48,710 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 02:23:48,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561636153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:48,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:48,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-19 02:23:48,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941144534] [2022-01-19 02:23:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:48,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 02:23:48,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 02:23:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-19 02:23:48,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:48,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 1966 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:48,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:48,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:48,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:49,471 INFO L129 PetriNetUnfolder]: 521/1415 cut-off events. [2022-01-19 02:23:49,472 INFO L130 PetriNetUnfolder]: For 34642/34642 co-relation queries the response was YES. [2022-01-19 02:23:49,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8020 conditions, 1415 events. 521/1415 cut-off events. For 34642/34642 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9192 event pairs, 4 based on Foata normal form. 31/1445 useless extension candidates. Maximal degree in co-relation 7971. Up to 290 conditions per place. [2022-01-19 02:23:49,485 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 157 selfloop transitions, 287 changer transitions 7/496 dead transitions. [2022-01-19 02:23:49,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 496 transitions, 5587 flow [2022-01-19 02:23:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 02:23:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 02:23:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-01-19 02:23:49,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-01-19 02:23:49,488 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-01-19 02:23:49,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-01-19 02:23:49,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:49,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-01-19 02:23:49,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:49,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:49,495 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:49,495 INFO L186 Difference]: Start difference. First operand has 191 places, 245 transitions, 1966 flow. Second operand 39 states and 2387 transitions. [2022-01-19 02:23:49,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 496 transitions, 5587 flow [2022-01-19 02:23:49,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 496 transitions, 5042 flow, removed 195 selfloop flow, removed 5 redundant places. [2022-01-19 02:23:49,551 INFO L242 Difference]: Finished difference. Result has 237 places, 404 transitions, 4532 flow [2022-01-19 02:23:49,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4532, PETRI_PLACES=237, PETRI_TRANSITIONS=404} [2022-01-19 02:23:49,551 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2022-01-19 02:23:49,551 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 404 transitions, 4532 flow [2022-01-19 02:23:49,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:49,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:49,552 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:49,568 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 02:23:49,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:49,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -360678591, now seen corresponding path program 5 times [2022-01-19 02:23:49,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180675154] [2022-01-19 02:23:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:49,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:49,835 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 02:23:49,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180675154] [2022-01-19 02:23:49,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180675154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047876443] [2022-01-19 02:23:49,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:23:49,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:49,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:49,836 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 02:23:49,838 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 02:23:49,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 02:23:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:49,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:23:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:50,041 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 02:23:50,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:50,161 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 02:23:50,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047876443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:50,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:50,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-19 02:23:50,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286556729] [2022-01-19 02:23:50,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:50,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 02:23:50,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:50,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 02:23:50,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-19 02:23:50,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:50,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 404 transitions, 4532 flow. Second operand has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:50,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:50,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:50,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:51,373 INFO L129 PetriNetUnfolder]: 708/2090 cut-off events. [2022-01-19 02:23:51,373 INFO L130 PetriNetUnfolder]: For 52169/52169 co-relation queries the response was YES. [2022-01-19 02:23:51,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 2090 events. 708/2090 cut-off events. For 52169/52169 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15982 event pairs, 13 based on Foata normal form. 31/2113 useless extension candidates. Maximal degree in co-relation 12254. Up to 360 conditions per place. [2022-01-19 02:23:51,395 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 233 selfloop transitions, 439 changer transitions 19/736 dead transitions. [2022-01-19 02:23:51,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 736 transitions, 9640 flow [2022-01-19 02:23:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 02:23:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 02:23:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4073 transitions. [2022-01-19 02:23:51,400 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.741354204586822 [2022-01-19 02:23:51,400 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4073 transitions. [2022-01-19 02:23:51,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4073 transitions. [2022-01-19 02:23:51,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:51,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4073 transitions. [2022-01-19 02:23:51,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 60.791044776119406) internal successors, (4073), 67 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:51,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:51,414 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:51,414 INFO L186 Difference]: Start difference. First operand has 237 places, 404 transitions, 4532 flow. Second operand 67 states and 4073 transitions. [2022-01-19 02:23:51,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 736 transitions, 9640 flow [2022-01-19 02:23:51,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 736 transitions, 8645 flow, removed 472 selfloop flow, removed 9 redundant places. [2022-01-19 02:23:51,580 INFO L242 Difference]: Finished difference. Result has 317 places, 592 transitions, 7602 flow [2022-01-19 02:23:51,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7602, PETRI_PLACES=317, PETRI_TRANSITIONS=592} [2022-01-19 02:23:51,581 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 245 predicate places. [2022-01-19 02:23:51,581 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 592 transitions, 7602 flow [2022-01-19 02:23:51,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:51,582 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:51,582 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:51,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 02:23:51,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:51,783 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash 545089743, now seen corresponding path program 6 times [2022-01-19 02:23:51,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:51,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374958674] [2022-01-19 02:23:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:51,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:51,883 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 02:23:51,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374958674] [2022-01-19 02:23:51,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374958674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:51,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528052846] [2022-01-19 02:23:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:23:51,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:51,887 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 02:23:51,920 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 02:23:51,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:23:51,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:23:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:52,131 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 02:23:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:52,386 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 02:23:52,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528052846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:52,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:52,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-19 02:23:52,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945067152] [2022-01-19 02:23:52,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:52,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:23:52,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:23:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:23:52,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:52,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 592 transitions, 7602 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:52,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:52,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:52,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:53,455 INFO L129 PetriNetUnfolder]: 840/2479 cut-off events. [2022-01-19 02:23:53,455 INFO L130 PetriNetUnfolder]: For 42171/42171 co-relation queries the response was YES. [2022-01-19 02:23:53,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14619 conditions, 2479 events. 840/2479 cut-off events. For 42171/42171 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19867 event pairs, 14 based on Foata normal form. 1/2476 useless extension candidates. Maximal degree in co-relation 14537. Up to 440 conditions per place. [2022-01-19 02:23:53,483 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 321 selfloop transitions, 521 changer transitions 17/904 dead transitions. [2022-01-19 02:23:53,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 904 transitions, 13698 flow [2022-01-19 02:23:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 02:23:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 02:23:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-01-19 02:23:53,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-01-19 02:23:53,492 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-01-19 02:23:53,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-01-19 02:23:53,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:53,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-01-19 02:23:53,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:53,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:53,512 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:53,513 INFO L186 Difference]: Start difference. First operand has 317 places, 592 transitions, 7602 flow. Second operand 41 states and 2515 transitions. [2022-01-19 02:23:53,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 904 transitions, 13698 flow [2022-01-19 02:23:53,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 904 transitions, 13001 flow, removed 213 selfloop flow, removed 28 redundant places. [2022-01-19 02:23:53,725 INFO L242 Difference]: Finished difference. Result has 337 places, 752 transitions, 10690 flow [2022-01-19 02:23:53,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10690, PETRI_PLACES=337, PETRI_TRANSITIONS=752} [2022-01-19 02:23:53,726 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 265 predicate places. [2022-01-19 02:23:53,726 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 752 transitions, 10690 flow [2022-01-19 02:23:53,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:53,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:53,727 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:53,742 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 02:23:53,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:53,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1852758055, now seen corresponding path program 7 times [2022-01-19 02:23:53,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:53,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878278629] [2022-01-19 02:23:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:53,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:54,004 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 02:23:54,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:54,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878278629] [2022-01-19 02:23:54,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878278629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596593452] [2022-01-19 02:23:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:23:54,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:54,006 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 02:23:54,007 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 02:23:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:54,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:23:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:54,202 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 02:23:54,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:54,401 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 02:23:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596593452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:54,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:23:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275816696] [2022-01-19 02:23:54,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:23:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:23:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:23:54,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:54,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 752 transitions, 10690 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:54,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:54,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:54,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:55,206 INFO L129 PetriNetUnfolder]: 845/2466 cut-off events. [2022-01-19 02:23:55,206 INFO L130 PetriNetUnfolder]: For 42610/42610 co-relation queries the response was YES. [2022-01-19 02:23:55,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15250 conditions, 2466 events. 845/2466 cut-off events. For 42610/42610 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19553 event pairs, 67 based on Foata normal form. 1/2429 useless extension candidates. Maximal degree in co-relation 15164. Up to 440 conditions per place. [2022-01-19 02:23:55,237 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 334 selfloop transitions, 444 changer transitions 7/830 dead transitions. [2022-01-19 02:23:55,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 830 transitions, 13357 flow [2022-01-19 02:23:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-19 02:23:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-01-19 02:23:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-01-19 02:23:55,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-01-19 02:23:55,239 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-01-19 02:23:55,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-01-19 02:23:55,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:55,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-01-19 02:23:55,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:55,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:55,242 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:55,242 INFO L186 Difference]: Start difference. First operand has 337 places, 752 transitions, 10690 flow. Second operand 21 states and 1296 transitions. [2022-01-19 02:23:55,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 830 transitions, 13357 flow [2022-01-19 02:23:55,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 830 transitions, 13013 flow, removed 61 selfloop flow, removed 17 redundant places. [2022-01-19 02:23:55,501 INFO L242 Difference]: Finished difference. Result has 341 places, 778 transitions, 11704 flow [2022-01-19 02:23:55,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=10399, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11704, PETRI_PLACES=341, PETRI_TRANSITIONS=778} [2022-01-19 02:23:55,502 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 269 predicate places. [2022-01-19 02:23:55,502 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 778 transitions, 11704 flow [2022-01-19 02:23:55,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:55,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:55,503 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:23:55,518 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 02:23:55,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-19 02:23:55,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash 951866337, now seen corresponding path program 8 times [2022-01-19 02:23:55,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:55,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275991531] [2022-01-19 02:23:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:55,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:55,788 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 02:23:55,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275991531] [2022-01-19 02:23:55,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275991531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:55,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667177476] [2022-01-19 02:23:55,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:23:55,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:55,790 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 02:23:55,791 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 02:23:55,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:23:55,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:23:55,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:56,008 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 02:23:56,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:56,213 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 02:23:56,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667177476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:56,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:56,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 02:23:56,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947026853] [2022-01-19 02:23:56,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:56,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:23:56,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:23:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:23:56,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:56,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 778 transitions, 11704 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:56,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:56,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:56,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:23:57,782 INFO L129 PetriNetUnfolder]: 1271/3799 cut-off events. [2022-01-19 02:23:57,782 INFO L130 PetriNetUnfolder]: For 74367/74367 co-relation queries the response was YES. [2022-01-19 02:23:57,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24503 conditions, 3799 events. 1271/3799 cut-off events. For 74367/74367 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33369 event pairs, 40 based on Foata normal form. 9/3789 useless extension candidates. Maximal degree in co-relation 24417. Up to 627 conditions per place. [2022-01-19 02:23:57,823 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 442 selfloop transitions, 810 changer transitions 14/1311 dead transitions. [2022-01-19 02:23:57,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1311 transitions, 22568 flow [2022-01-19 02:23:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 02:23:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 02:23:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2719 transitions. [2022-01-19 02:23:57,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7536031042128604 [2022-01-19 02:23:57,825 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2719 transitions. [2022-01-19 02:23:57,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2719 transitions. [2022-01-19 02:23:57,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:23:57,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2719 transitions. [2022-01-19 02:23:57,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.79545454545455) internal successors, (2719), 44 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:57,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:57,832 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:57,832 INFO L186 Difference]: Start difference. First operand has 341 places, 778 transitions, 11704 flow. Second operand 44 states and 2719 transitions. [2022-01-19 02:23:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1311 transitions, 22568 flow [2022-01-19 02:23:58,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1311 transitions, 21718 flow, removed 48 selfloop flow, removed 8 redundant places. [2022-01-19 02:23:58,264 INFO L242 Difference]: Finished difference. Result has 394 places, 1095 transitions, 19168 flow [2022-01-19 02:23:58,265 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19168, PETRI_PLACES=394, PETRI_TRANSITIONS=1095} [2022-01-19 02:23:58,265 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2022-01-19 02:23:58,266 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1095 transitions, 19168 flow [2022-01-19 02:23:58,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:58,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:23:58,266 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] [2022-01-19 02:23:58,283 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 02:23:58,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:58,471 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:23:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:23:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1520867889, now seen corresponding path program 9 times [2022-01-19 02:23:58,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:23:58,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769535979] [2022-01-19 02:23:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:23:58,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:23:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:23:58,533 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 02:23:58,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:23:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769535979] [2022-01-19 02:23:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769535979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:23:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616045177] [2022-01-19 02:23:58,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:23:58,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:23:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:23:58,535 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 02:23:58,575 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 02:23:58,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:23:58,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:23:58,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:23:58,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:23:58,753 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 02:23:58,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:23:58,939 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 02:23:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616045177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:23:58,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:23:58,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 02:23:58,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630416346] [2022-01-19 02:23:58,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:23:58,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:23:58,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:23:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:23:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:23:58,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:23:58,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1095 transitions, 19168 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:23:58,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:23:58,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:23:58,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:24:01,034 INFO L129 PetriNetUnfolder]: 1238/3666 cut-off events. [2022-01-19 02:24:01,035 INFO L130 PetriNetUnfolder]: For 104324/104324 co-relation queries the response was YES. [2022-01-19 02:24:01,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25742 conditions, 3666 events. 1238/3666 cut-off events. For 104324/104324 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31973 event pairs, 43 based on Foata normal form. 43/3692 useless extension candidates. Maximal degree in co-relation 25637. Up to 653 conditions per place. [2022-01-19 02:24:01,080 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 296 selfloop transitions, 970 changer transitions 3/1314 dead transitions. [2022-01-19 02:24:01,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1314 transitions, 24260 flow [2022-01-19 02:24:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 02:24:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 02:24:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3835 transitions. [2022-01-19 02:24:01,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423538521099496 [2022-01-19 02:24:01,083 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3835 transitions. [2022-01-19 02:24:01,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3835 transitions. [2022-01-19 02:24:01,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:24:01,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3835 transitions. [2022-01-19 02:24:01,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.87301587301587) internal successors, (3835), 63 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:01,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:01,091 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:01,091 INFO L186 Difference]: Start difference. First operand has 394 places, 1095 transitions, 19168 flow. Second operand 63 states and 3835 transitions. [2022-01-19 02:24:01,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1314 transitions, 24260 flow [2022-01-19 02:24:01,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1314 transitions, 23605 flow, removed 111 selfloop flow, removed 20 redundant places. [2022-01-19 02:24:01,722 INFO L242 Difference]: Finished difference. Result has 442 places, 1183 transitions, 22741 flow [2022-01-19 02:24:01,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17960, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=22741, PETRI_PLACES=442, PETRI_TRANSITIONS=1183} [2022-01-19 02:24:01,723 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 370 predicate places. [2022-01-19 02:24:01,723 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 1183 transitions, 22741 flow [2022-01-19 02:24:01,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:01,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:24:01,724 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:24:01,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 02:24:01,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 02:24:01,930 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:24:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:24:01,930 INFO L85 PathProgramCache]: Analyzing trace with hash 125780809, now seen corresponding path program 10 times [2022-01-19 02:24:01,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:24:01,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611408889] [2022-01-19 02:24:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:24:01,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:24:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:24:02,009 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 02:24:02,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:24:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611408889] [2022-01-19 02:24:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611408889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:24:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341807434] [2022-01-19 02:24:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:24:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:24:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:24:02,012 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 02:24:02,013 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 02:24:02,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:24:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:24:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:24:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:24:02,264 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 02:24:02,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:24:02,517 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 02:24:02,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341807434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:24:02,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:24:02,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:24:02,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806821193] [2022-01-19 02:24:02,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:24:02,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:24:02,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:24:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:24:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:24:02,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:24:02,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1183 transitions, 22741 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:02,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:24:02,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:24:02,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:24:03,974 INFO L129 PetriNetUnfolder]: 1261/3731 cut-off events. [2022-01-19 02:24:03,974 INFO L130 PetriNetUnfolder]: For 100950/100950 co-relation queries the response was YES. [2022-01-19 02:24:04,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28542 conditions, 3731 events. 1261/3731 cut-off events. For 100950/100950 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32766 event pairs, 42 based on Foata normal form. 1/3722 useless extension candidates. Maximal degree in co-relation 28430. Up to 1723 conditions per place. [2022-01-19 02:24:04,021 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 971 selfloop transitions, 229 changer transitions 8/1253 dead transitions. [2022-01-19 02:24:04,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1253 transitions, 26303 flow [2022-01-19 02:24:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 02:24:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 02:24:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1104 transitions. [2022-01-19 02:24:04,022 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479674796747967 [2022-01-19 02:24:04,022 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1104 transitions. [2022-01-19 02:24:04,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1104 transitions. [2022-01-19 02:24:04,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:24:04,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1104 transitions. [2022-01-19 02:24:04,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.333333333333336) internal successors, (1104), 18 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:04,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:04,025 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:04,025 INFO L186 Difference]: Start difference. First operand has 442 places, 1183 transitions, 22741 flow. Second operand 18 states and 1104 transitions. [2022-01-19 02:24:04,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1253 transitions, 26303 flow [2022-01-19 02:24:04,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1253 transitions, 25567 flow, removed 74 selfloop flow, removed 37 redundant places. [2022-01-19 02:24:04,685 INFO L242 Difference]: Finished difference. Result has 427 places, 1215 transitions, 23399 flow [2022-01-19 02:24:04,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=22038, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23399, PETRI_PLACES=427, PETRI_TRANSITIONS=1215} [2022-01-19 02:24:04,686 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 355 predicate places. [2022-01-19 02:24:04,686 INFO L470 AbstractCegarLoop]: Abstraction has has 427 places, 1215 transitions, 23399 flow [2022-01-19 02:24:04,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:04,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:24:04,686 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:24:04,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-19 02:24:04,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 02:24:04,902 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:24:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:24:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1670132595, now seen corresponding path program 11 times [2022-01-19 02:24:04,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:24:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409186659] [2022-01-19 02:24:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:24:04,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:24:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:24:05,019 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 02:24:05,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:24:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409186659] [2022-01-19 02:24:05,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409186659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:24:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264632258] [2022-01-19 02:24:05,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:24:05,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:24:05,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:24:05,020 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 02:24:05,021 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 02:24:05,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 02:24:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:24:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:24:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:24:05,208 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 02:24:05,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:24:05,347 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 02:24:05,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264632258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:24:05,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:24:05,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-19 02:24:05,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314790244] [2022-01-19 02:24:05,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:24:05,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:24:05,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:24:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:24:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:24:05,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:24:05,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1215 transitions, 23399 flow. Second operand has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:05,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:24:05,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:24:05,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:24:08,119 INFO L129 PetriNetUnfolder]: 1964/5682 cut-off events. [2022-01-19 02:24:08,119 INFO L130 PetriNetUnfolder]: For 162863/162863 co-relation queries the response was YES. [2022-01-19 02:24:08,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44476 conditions, 5682 events. 1964/5682 cut-off events. For 162863/162863 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 54407 event pairs, 55 based on Foata normal form. 4/5679 useless extension candidates. Maximal degree in co-relation 44360. Up to 1701 conditions per place. [2022-01-19 02:24:08,195 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 890 selfloop transitions, 1200 changer transitions 16/2151 dead transitions. [2022-01-19 02:24:08,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2151 transitions, 46091 flow [2022-01-19 02:24:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 02:24:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 02:24:08,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3579 transitions. [2022-01-19 02:24:08,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7397684993799091 [2022-01-19 02:24:08,198 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3579 transitions. [2022-01-19 02:24:08,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3579 transitions. [2022-01-19 02:24:08,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:24:08,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3579 transitions. [2022-01-19 02:24:08,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 60.66101694915254) internal successors, (3579), 59 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:08,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:08,206 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:08,206 INFO L186 Difference]: Start difference. First operand has 427 places, 1215 transitions, 23399 flow. Second operand 59 states and 3579 transitions. [2022-01-19 02:24:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2151 transitions, 46091 flow [2022-01-19 02:24:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 2151 transitions, 45457 flow, removed 119 selfloop flow, removed 9 redundant places. [2022-01-19 02:24:09,714 INFO L242 Difference]: Finished difference. Result has 497 places, 1947 transitions, 43725 flow [2022-01-19 02:24:09,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=23064, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=43725, PETRI_PLACES=497, PETRI_TRANSITIONS=1947} [2022-01-19 02:24:09,715 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 425 predicate places. [2022-01-19 02:24:09,715 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 1947 transitions, 43725 flow [2022-01-19 02:24:09,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:09,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:24:09,716 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:24:09,732 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 02:24:09,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 02:24:09,916 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:24:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:24:09,916 INFO L85 PathProgramCache]: Analyzing trace with hash -534521583, now seen corresponding path program 12 times [2022-01-19 02:24:09,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:24:09,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260879609] [2022-01-19 02:24:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:24:09,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:24:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:24:09,990 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 02:24:09,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:24:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260879609] [2022-01-19 02:24:09,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260879609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:24:09,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23495409] [2022-01-19 02:24:09,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:24:09,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:24:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:24:09,992 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 02:24:09,993 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 02:24:10,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:24:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:24:10,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:24:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:24:10,253 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 02:24:10,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:24:10,448 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 02:24:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23495409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:24:10,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:24:10,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:24:10,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391969834] [2022-01-19 02:24:10,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:24:10,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:24:10,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:24:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:24:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:24:10,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:24:10,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1947 transitions, 43725 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:10,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:24:10,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:24:10,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:24:15,849 INFO L129 PetriNetUnfolder]: 3075/9213 cut-off events. [2022-01-19 02:24:15,849 INFO L130 PetriNetUnfolder]: For 387993/387993 co-relation queries the response was YES. [2022-01-19 02:24:15,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81817 conditions, 9213 events. 3075/9213 cut-off events. For 387993/387993 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 98488 event pairs, 161 based on Foata normal form. 10/9195 useless extension candidates. Maximal degree in co-relation 81681. Up to 2630 conditions per place. [2022-01-19 02:24:15,982 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1892 selfloop transitions, 1233 changer transitions 12/3182 dead transitions. [2022-01-19 02:24:15,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 3182 transitions, 78357 flow [2022-01-19 02:24:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 02:24:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 02:24:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3735 transitions. [2022-01-19 02:24:15,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7467013194722111 [2022-01-19 02:24:15,985 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3735 transitions. [2022-01-19 02:24:15,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3735 transitions. [2022-01-19 02:24:15,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:24:15,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3735 transitions. [2022-01-19 02:24:15,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.22950819672131) internal successors, (3735), 61 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:15,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:15,995 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:15,995 INFO L186 Difference]: Start difference. First operand has 497 places, 1947 transitions, 43725 flow. Second operand 61 states and 3735 transitions. [2022-01-19 02:24:15,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 3182 transitions, 78357 flow [2022-01-19 02:24:20,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 3182 transitions, 76856 flow, removed 283 selfloop flow, removed 15 redundant places. [2022-01-19 02:24:20,393 INFO L242 Difference]: Finished difference. Result has 569 places, 2811 transitions, 68554 flow [2022-01-19 02:24:20,394 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=42793, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=68554, PETRI_PLACES=569, PETRI_TRANSITIONS=2811} [2022-01-19 02:24:20,395 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 497 predicate places. [2022-01-19 02:24:20,395 INFO L470 AbstractCegarLoop]: Abstraction has has 569 places, 2811 transitions, 68554 flow [2022-01-19 02:24:20,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:20,395 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:24:20,396 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:24:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 02:24:20,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 02:24:20,612 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:24:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:24:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash -87816547, now seen corresponding path program 13 times [2022-01-19 02:24:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:24:20,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466914379] [2022-01-19 02:24:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:24:20,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:24:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:24:20,673 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 02:24:20,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:24:20,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466914379] [2022-01-19 02:24:20,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466914379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:24:20,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466872828] [2022-01-19 02:24:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:24:20,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:24:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:24:20,675 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 02:24:20,676 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 02:24:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:24:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:24:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:24:20,903 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 02:24:20,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:24:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:24:21,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466872828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:24:21,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:24:21,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 02:24:21,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547050048] [2022-01-19 02:24:21,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:24:21,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:24:21,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:24:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:24:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:24:21,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:24:21,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 2811 transitions, 68554 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:21,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:24:21,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:24:21,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:24:30,284 INFO L129 PetriNetUnfolder]: 3996/12303 cut-off events. [2022-01-19 02:24:30,285 INFO L130 PetriNetUnfolder]: For 803620/803620 co-relation queries the response was YES. [2022-01-19 02:24:30,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120373 conditions, 12303 events. 3996/12303 cut-off events. For 803620/803620 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 139657 event pairs, 207 based on Foata normal form. 16/12270 useless extension candidates. Maximal degree in co-relation 120210. Up to 2477 conditions per place. [2022-01-19 02:24:30,539 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1820 selfloop transitions, 1820 changer transitions 12/3697 dead transitions. [2022-01-19 02:24:30,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 3697 transitions, 96925 flow [2022-01-19 02:24:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-19 02:24:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-19 02:24:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2793 transitions. [2022-01-19 02:24:30,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7569105691056911 [2022-01-19 02:24:30,542 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2793 transitions. [2022-01-19 02:24:30,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2793 transitions. [2022-01-19 02:24:30,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:24:30,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2793 transitions. [2022-01-19 02:24:30,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.06666666666667) internal successors, (2793), 45 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:30,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:30,548 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 82.0) internal successors, (3772), 46 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:30,548 INFO L186 Difference]: Start difference. First operand has 569 places, 2811 transitions, 68554 flow. Second operand 45 states and 2793 transitions. [2022-01-19 02:24:30,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 3697 transitions, 96925 flow [2022-01-19 02:24:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 3697 transitions, 95547 flow, removed 578 selfloop flow, removed 16 redundant places. [2022-01-19 02:24:40,864 INFO L242 Difference]: Finished difference. Result has 619 places, 3408 transitions, 89268 flow [2022-01-19 02:24:40,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=67494, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=89268, PETRI_PLACES=619, PETRI_TRANSITIONS=3408} [2022-01-19 02:24:40,867 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 547 predicate places. [2022-01-19 02:24:40,867 INFO L470 AbstractCegarLoop]: Abstraction has has 619 places, 3408 transitions, 89268 flow [2022-01-19 02:24:40,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:40,867 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:24:40,867 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:24:40,886 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 02:24:41,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:24:41,083 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:24:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:24:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash 60354813, now seen corresponding path program 14 times [2022-01-19 02:24:41,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:24:41,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291692945] [2022-01-19 02:24:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:24:41,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:24:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:24:41,142 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 02:24:41,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:24:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291692945] [2022-01-19 02:24:41,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291692945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:24:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699394417] [2022-01-19 02:24:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:24:41,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:24:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:24:41,143 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 02:24:41,144 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 02:24:41,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:24:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:24:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:24:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:24:41,372 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 02:24:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:24:41,562 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 02:24:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699394417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:24:41,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:24:41,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-01-19 02:24:41,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500124395] [2022-01-19 02:24:41,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:24:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:24:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:24:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:24:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:24:41,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:24:41,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 3408 transitions, 89268 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:41,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:24:41,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:24:41,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:24:53,197 INFO L129 PetriNetUnfolder]: 3998/12378 cut-off events. [2022-01-19 02:24:53,197 INFO L130 PetriNetUnfolder]: For 1010473/1010473 co-relation queries the response was YES. [2022-01-19 02:24:53,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127909 conditions, 12378 events. 3998/12378 cut-off events. For 1010473/1010473 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 140643 event pairs, 239 based on Foata normal form. 79/12418 useless extension candidates. Maximal degree in co-relation 127724. Up to 2342 conditions per place. [2022-01-19 02:24:53,414 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1011 selfloop transitions, 2651 changer transitions 6/3713 dead transitions. [2022-01-19 02:24:53,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 3713 transitions, 103012 flow [2022-01-19 02:24:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 02:24:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 02:24:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3626 transitions. [2022-01-19 02:24:53,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7494832575444399 [2022-01-19 02:24:53,417 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3626 transitions. [2022-01-19 02:24:53,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3626 transitions. [2022-01-19 02:24:53,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:24:53,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3626 transitions. [2022-01-19 02:24:53,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.45762711864407) internal successors, (3626), 59 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:53,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:53,425 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:24:53,425 INFO L186 Difference]: Start difference. First operand has 619 places, 3408 transitions, 89268 flow. Second operand 59 states and 3626 transitions. [2022-01-19 02:24:53,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 3713 transitions, 103012 flow [2022-01-19 02:25:04,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 3713 transitions, 102112 flow, removed 355 selfloop flow, removed 18 redundant places. [2022-01-19 02:25:04,425 INFO L242 Difference]: Finished difference. Result has 659 places, 3518 transitions, 98869 flow [2022-01-19 02:25:04,427 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=87253, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=98869, PETRI_PLACES=659, PETRI_TRANSITIONS=3518} [2022-01-19 02:25:04,427 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 587 predicate places. [2022-01-19 02:25:04,427 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 3518 transitions, 98869 flow [2022-01-19 02:25:04,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:04,428 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:25:04,428 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:25:04,445 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 02:25:04,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 02:25:04,628 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:25:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:25:04,629 INFO L85 PathProgramCache]: Analyzing trace with hash -490468571, now seen corresponding path program 15 times [2022-01-19 02:25:04,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:25:04,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253836102] [2022-01-19 02:25:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:25:04,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:25:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:25:04,709 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 02:25:04,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:25:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253836102] [2022-01-19 02:25:04,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253836102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:25:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150016875] [2022-01-19 02:25:04,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:25:04,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:25:04,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:25:04,710 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 02:25:04,711 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 02:25:04,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:25:04,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:25:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:25:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:25:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:25:04,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:25:05,077 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 02:25:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150016875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:25:05,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:25:05,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-19 02:25:05,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559061545] [2022-01-19 02:25:05,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:25:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:25:05,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:25:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:25:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:25:05,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:25:05,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 3518 transitions, 98869 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:05,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:25:05,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:25:05,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:25:17,984 INFO L129 PetriNetUnfolder]: 4261/12974 cut-off events. [2022-01-19 02:25:17,984 INFO L130 PetriNetUnfolder]: For 1168799/1168799 co-relation queries the response was YES. [2022-01-19 02:25:18,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141342 conditions, 12974 events. 4261/12974 cut-off events. For 1168799/1168799 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 147393 event pairs, 207 based on Foata normal form. 120/13076 useless extension candidates. Maximal degree in co-relation 141153. Up to 4339 conditions per place. [2022-01-19 02:25:18,357 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1435 selfloop transitions, 2489 changer transitions 16/3985 dead transitions. [2022-01-19 02:25:18,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 3985 transitions, 118073 flow [2022-01-19 02:25:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 02:25:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 02:25:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2022-01-19 02:25:18,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2022-01-19 02:25:18,359 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2022-01-19 02:25:18,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2022-01-19 02:25:18,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:25:18,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2022-01-19 02:25:18,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:18,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:18,364 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:18,364 INFO L186 Difference]: Start difference. First operand has 659 places, 3518 transitions, 98869 flow. Second operand 40 states and 2495 transitions. [2022-01-19 02:25:18,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 3985 transitions, 118073 flow [2022-01-19 02:25:29,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 3985 transitions, 114861 flow, removed 158 selfloop flow, removed 30 redundant places. [2022-01-19 02:25:29,765 INFO L242 Difference]: Finished difference. Result has 697 places, 3747 transitions, 112241 flow [2022-01-19 02:25:29,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=95895, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=112241, PETRI_PLACES=697, PETRI_TRANSITIONS=3747} [2022-01-19 02:25:29,768 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 625 predicate places. [2022-01-19 02:25:29,768 INFO L470 AbstractCegarLoop]: Abstraction has has 697 places, 3747 transitions, 112241 flow [2022-01-19 02:25:29,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:29,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:25:29,769 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:25:29,784 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 02:25:29,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:25:29,969 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:25:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:25:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1205573759, now seen corresponding path program 16 times [2022-01-19 02:25:29,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:25:29,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548601983] [2022-01-19 02:25:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:25:29,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:25:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:25:30,026 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 02:25:30,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:25:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548601983] [2022-01-19 02:25:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548601983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:25:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055478653] [2022-01-19 02:25:30,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:25:30,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:25:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:25:30,027 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 02:25:30,029 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 02:25:30,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:25:30,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:25:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:25:30,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:25:30,235 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 02:25:30,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:25:30,385 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 02:25:30,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055478653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:25:30,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:25:30,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:25:30,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21348769] [2022-01-19 02:25:30,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:25:30,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:25:30,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:25:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:25:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:25:30,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:25:30,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 3747 transitions, 112241 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:30,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:25:30,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:25:30,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:25:45,196 INFO L129 PetriNetUnfolder]: 4542/14054 cut-off events. [2022-01-19 02:25:45,196 INFO L130 PetriNetUnfolder]: For 1608428/1608428 co-relation queries the response was YES. [2022-01-19 02:25:45,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166589 conditions, 14054 events. 4542/14054 cut-off events. For 1608428/1608428 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 162332 event pairs, 275 based on Foata normal form. 7/14004 useless extension candidates. Maximal degree in co-relation 166375. Up to 3332 conditions per place. [2022-01-19 02:25:45,513 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2292 selfloop transitions, 1831 changer transitions 9/4177 dead transitions. [2022-01-19 02:25:45,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 4177 transitions, 132427 flow [2022-01-19 02:25:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 02:25:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 02:25:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2707 transitions. [2022-01-19 02:25:45,515 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7502771618625277 [2022-01-19 02:25:45,515 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2707 transitions. [2022-01-19 02:25:45,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2707 transitions. [2022-01-19 02:25:45,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:25:45,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2707 transitions. [2022-01-19 02:25:45,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 61.52272727272727) internal successors, (2707), 44 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:45,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:45,520 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 82.0) internal successors, (3690), 45 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:45,520 INFO L186 Difference]: Start difference. First operand has 697 places, 3747 transitions, 112241 flow. Second operand 44 states and 2707 transitions. [2022-01-19 02:25:45,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 4177 transitions, 132427 flow [2022-01-19 02:25:59,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 4177 transitions, 128120 flow, removed 299 selfloop flow, removed 8 redundant places. [2022-01-19 02:25:59,766 INFO L242 Difference]: Finished difference. Result has 747 places, 3962 transitions, 120799 flow [2022-01-19 02:25:59,769 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=108161, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=120799, PETRI_PLACES=747, PETRI_TRANSITIONS=3962} [2022-01-19 02:25:59,769 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 675 predicate places. [2022-01-19 02:25:59,769 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 3962 transitions, 120799 flow [2022-01-19 02:25:59,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:25:59,770 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:25:59,770 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:25:59,785 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 02:25:59,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:25:59,975 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:25:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:25:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1266352041, now seen corresponding path program 17 times [2022-01-19 02:25:59,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:25:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039625666] [2022-01-19 02:25:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:25:59,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:25:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:26:00,045 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 02:26:00,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:26:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039625666] [2022-01-19 02:26:00,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039625666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:26:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074279367] [2022-01-19 02:26:00,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:26:00,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:26:00,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:26:00,046 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 02:26:00,047 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 02:26:00,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:26:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:26:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 02:26:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:26:00,264 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 02:26:00,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:26:00,410 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 02:26:00,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074279367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:26:00,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:26:00,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-19 02:26:00,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90667696] [2022-01-19 02:26:00,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:26:00,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:26:00,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:26:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:26:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:26:00,412 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:26:00,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 3962 transitions, 120799 flow. Second operand has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:26:00,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:26:00,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:26:00,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:26:18,052 INFO L129 PetriNetUnfolder]: 5228/15175 cut-off events. [2022-01-19 02:26:18,052 INFO L130 PetriNetUnfolder]: For 1796888/1796888 co-relation queries the response was YES. [2022-01-19 02:26:18,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185731 conditions, 15175 events. 5228/15175 cut-off events. For 1796888/1796888 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 171593 event pairs, 256 based on Foata normal form. 1/15138 useless extension candidates. Maximal degree in co-relation 185508. Up to 5468 conditions per place. [2022-01-19 02:26:18,523 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2284 selfloop transitions, 2489 changer transitions 5/4823 dead transitions. [2022-01-19 02:26:18,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 4823 transitions, 156790 flow [2022-01-19 02:26:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 02:26:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 02:26:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1406 transitions. [2022-01-19 02:26:18,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454931071049841 [2022-01-19 02:26:18,524 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1406 transitions. [2022-01-19 02:26:18,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1406 transitions. [2022-01-19 02:26:18,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:26:18,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1406 transitions. [2022-01-19 02:26:18,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.130434782608695) internal successors, (1406), 23 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:26:18,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 82.0) internal successors, (1968), 24 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:26:18,527 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 82.0) internal successors, (1968), 24 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:26:18,527 INFO L186 Difference]: Start difference. First operand has 747 places, 3962 transitions, 120799 flow. Second operand 23 states and 1406 transitions. [2022-01-19 02:26:18,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 4823 transitions, 156790 flow [2022-01-19 02:26:36,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 4823 transitions, 156056 flow, removed 246 selfloop flow, removed 15 redundant places. [2022-01-19 02:26:36,679 INFO L242 Difference]: Finished difference. Result has 759 places, 4553 transitions, 150525 flow [2022-01-19 02:26:36,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=120119, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=150525, PETRI_PLACES=759, PETRI_TRANSITIONS=4553} [2022-01-19 02:26:36,682 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 687 predicate places. [2022-01-19 02:26:36,682 INFO L470 AbstractCegarLoop]: Abstraction has has 759 places, 4553 transitions, 150525 flow [2022-01-19 02:26:36,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:26:36,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:26:36,682 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:26:36,698 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 02:26:36,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:26:36,883 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:26:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:26:36,883 INFO L85 PathProgramCache]: Analyzing trace with hash 943023525, now seen corresponding path program 18 times [2022-01-19 02:26:36,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:26:36,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259701927] [2022-01-19 02:26:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:26:36,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:26:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:26:36,943 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 02:26:36,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:26:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259701927] [2022-01-19 02:26:36,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259701927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:26:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674780701] [2022-01-19 02:26:36,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:26:36,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:26:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:26:36,944 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 02:26:36,945 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 02:26:36,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:26:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:26:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:26:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:26:37,149 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 02:26:37,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:26:37,301 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 02:26:37,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674780701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:26:37,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:26:37,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 02:26:37,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850239653] [2022-01-19 02:26:37,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:26:37,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:26:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:26:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:26:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:26:37,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:26:37,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 4553 transitions, 150525 flow. Second operand has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:26:37,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:26:37,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:26:37,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:27:02,396 INFO L129 PetriNetUnfolder]: 5435/15830 cut-off events. [2022-01-19 02:27:02,397 INFO L130 PetriNetUnfolder]: For 1972473/1972473 co-relation queries the response was YES. [2022-01-19 02:27:02,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202665 conditions, 15830 events. 5435/15830 cut-off events. For 1972473/1972473 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 180492 event pairs, 262 based on Foata normal form. 7/15797 useless extension candidates. Maximal degree in co-relation 202437. Up to 7040 conditions per place. [2022-01-19 02:27:02,934 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3566 selfloop transitions, 1210 changer transitions 2/4823 dead transitions. [2022-01-19 02:27:02,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 4823 transitions, 168799 flow [2022-01-19 02:27:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 02:27:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 02:27:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1789 transitions. [2022-01-19 02:27:02,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523128679562657 [2022-01-19 02:27:02,940 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1789 transitions. [2022-01-19 02:27:02,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1789 transitions. [2022-01-19 02:27:02,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:27:02,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1789 transitions. [2022-01-19 02:27:02,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 61.689655172413794) internal successors, (1789), 29 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:02,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:02,943 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 82.0) internal successors, (2460), 30 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:02,943 INFO L186 Difference]: Start difference. First operand has 759 places, 4553 transitions, 150525 flow. Second operand 29 states and 1789 transitions. [2022-01-19 02:27:02,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 4823 transitions, 168799 flow [2022-01-19 02:27:22,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 4823 transitions, 167657 flow, removed 38 selfloop flow, removed 16 redundant places. [2022-01-19 02:27:22,207 INFO L242 Difference]: Finished difference. Result has 775 places, 4711 transitions, 159250 flow [2022-01-19 02:27:22,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=149412, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=159250, PETRI_PLACES=775, PETRI_TRANSITIONS=4711} [2022-01-19 02:27:22,211 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 703 predicate places. [2022-01-19 02:27:22,211 INFO L470 AbstractCegarLoop]: Abstraction has has 775 places, 4711 transitions, 159250 flow [2022-01-19 02:27:22,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:22,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:27:22,212 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:27:22,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 02:27:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:27:22,419 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:27:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:27:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1222370885, now seen corresponding path program 19 times [2022-01-19 02:27:22,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:27:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824058079] [2022-01-19 02:27:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:27:22,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:27:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:27:22,486 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 02:27:22,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:27:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824058079] [2022-01-19 02:27:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824058079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:27:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320558579] [2022-01-19 02:27:22,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:27:22,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:27:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:27:22,487 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 02:27:22,488 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 02:27:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:27:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:27:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:27:22,678 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 02:27:22,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:27:22,833 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 02:27:22,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320558579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:27:22,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:27:22,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:27:22,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29424402] [2022-01-19 02:27:22,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:27:22,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:27:22,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:27:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:27:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:27:22,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:27:22,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 4711 transitions, 159250 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:22,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:27:22,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:27:22,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:27:48,936 INFO L129 PetriNetUnfolder]: 5652/16530 cut-off events. [2022-01-19 02:27:48,936 INFO L130 PetriNetUnfolder]: For 2319433/2319433 co-relation queries the response was YES. [2022-01-19 02:27:49,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217619 conditions, 16530 events. 5652/16530 cut-off events. For 2319433/2319433 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 190265 event pairs, 345 based on Foata normal form. 8/16492 useless extension candidates. Maximal degree in co-relation 217386. Up to 7605 conditions per place. [2022-01-19 02:27:49,359 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3789 selfloop transitions, 1132 changer transitions 8/4974 dead transitions. [2022-01-19 02:27:49,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 4974 transitions, 177869 flow [2022-01-19 02:27:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 02:27:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 02:27:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1956 transitions. [2022-01-19 02:27:49,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7454268292682927 [2022-01-19 02:27:49,364 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1956 transitions. [2022-01-19 02:27:49,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1956 transitions. [2022-01-19 02:27:49,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:27:49,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1956 transitions. [2022-01-19 02:27:49,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 61.125) internal successors, (1956), 32 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:49,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:49,368 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 82.0) internal successors, (2706), 33 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:27:49,368 INFO L186 Difference]: Start difference. First operand has 775 places, 4711 transitions, 159250 flow. Second operand 32 states and 1956 transitions. [2022-01-19 02:27:49,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 4974 transitions, 177869 flow [2022-01-19 02:28:13,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 4974 transitions, 175037 flow, removed 684 selfloop flow, removed 15 redundant places. [2022-01-19 02:28:13,738 INFO L242 Difference]: Finished difference. Result has 800 places, 4876 transitions, 166576 flow [2022-01-19 02:28:13,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=156451, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=166576, PETRI_PLACES=800, PETRI_TRANSITIONS=4876} [2022-01-19 02:28:13,742 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 728 predicate places. [2022-01-19 02:28:13,742 INFO L470 AbstractCegarLoop]: Abstraction has has 800 places, 4876 transitions, 166576 flow [2022-01-19 02:28:13,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:28:13,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:28:13,742 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:28:13,758 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 02:28:13,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 02:28:13,943 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:28:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:28:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1692757929, now seen corresponding path program 20 times [2022-01-19 02:28:13,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:28:13,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624350825] [2022-01-19 02:28:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:28:13,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:28:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:28:14,001 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 02:28:14,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:28:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624350825] [2022-01-19 02:28:14,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624350825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:28:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992562438] [2022-01-19 02:28:14,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:28:14,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:28:14,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:28:14,003 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 02:28:14,003 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 02:28:14,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:28:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:28:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:28:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:28:14,197 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 02:28:14,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:28:14,337 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 02:28:14,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992562438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:28:14,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:28:14,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:28:14,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40056305] [2022-01-19 02:28:14,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:28:14,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:28:14,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:28:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:28:14,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:28:14,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:28:14,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 4876 transitions, 166576 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:28:14,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:28:14,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:28:14,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:28:46,671 INFO L129 PetriNetUnfolder]: 6190/18300 cut-off events. [2022-01-19 02:28:46,672 INFO L130 PetriNetUnfolder]: For 2755234/2755234 co-relation queries the response was YES. [2022-01-19 02:28:47,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244819 conditions, 18300 events. 6190/18300 cut-off events. For 2755234/2755234 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 215030 event pairs, 287 based on Foata normal form. 15/18268 useless extension candidates. Maximal degree in co-relation 244577. Up to 7307 conditions per place. [2022-01-19 02:28:47,184 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 3830 selfloop transitions, 1629 changer transitions 17/5521 dead transitions. [2022-01-19 02:28:47,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 5521 transitions, 199576 flow [2022-01-19 02:28:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 02:28:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 02:28:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2517 transitions. [2022-01-19 02:28:47,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7486615110053539 [2022-01-19 02:28:47,187 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2517 transitions. [2022-01-19 02:28:47,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2517 transitions. [2022-01-19 02:28:47,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:28:47,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2517 transitions. [2022-01-19 02:28:47,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.390243902439025) internal successors, (2517), 41 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:28:47,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:28:47,191 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:28:47,191 INFO L186 Difference]: Start difference. First operand has 800 places, 4876 transitions, 166576 flow. Second operand 41 states and 2517 transitions. [2022-01-19 02:28:47,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 5521 transitions, 199576 flow [2022-01-19 02:29:23,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 5521 transitions, 196127 flow, removed 1543 selfloop flow, removed 15 redundant places. [2022-01-19 02:29:23,510 INFO L242 Difference]: Finished difference. Result has 841 places, 5267 transitions, 185093 flow [2022-01-19 02:29:23,513 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=164659, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=185093, PETRI_PLACES=841, PETRI_TRANSITIONS=5267} [2022-01-19 02:29:23,513 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 769 predicate places. [2022-01-19 02:29:23,513 INFO L470 AbstractCegarLoop]: Abstraction has has 841 places, 5267 transitions, 185093 flow [2022-01-19 02:29:23,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:29:23,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:29:23,514 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:29:23,529 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 02:29:23,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 02:29:23,714 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:29:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:29:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash -909859479, now seen corresponding path program 21 times [2022-01-19 02:29:23,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:29:23,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792028541] [2022-01-19 02:29:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:29:23,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:29:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:29:23,783 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 02:29:23,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:29:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792028541] [2022-01-19 02:29:23,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792028541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:29:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205811215] [2022-01-19 02:29:23,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:29:23,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:29:23,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:29:23,785 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 02:29:23,786 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 02:29:23,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:29:23,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:29:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:29:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:29:23,984 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 02:29:23,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:29:24,125 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 02:29:24,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205811215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:29:24,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:29:24,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-19 02:29:24,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677628489] [2022-01-19 02:29:24,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:29:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:29:24,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:29:24,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:29:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:29:24,127 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:29:24,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 5267 transitions, 185093 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:29:24,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:29:24,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:29:24,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:30:03,462 INFO L129 PetriNetUnfolder]: 6178/18223 cut-off events. [2022-01-19 02:30:03,462 INFO L130 PetriNetUnfolder]: For 1695143/1695143 co-relation queries the response was YES. [2022-01-19 02:30:03,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229667 conditions, 18223 events. 6178/18223 cut-off events. For 1695143/1695143 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 213789 event pairs, 311 based on Foata normal form. 1/18179 useless extension candidates. Maximal degree in co-relation 229408. Up to 8820 conditions per place. [2022-01-19 02:30:03,998 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 4247 selfloop transitions, 997 changer transitions 4/5293 dead transitions. [2022-01-19 02:30:03,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 5293 transitions, 195991 flow [2022-01-19 02:30:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 02:30:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 02:30:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1097 transitions. [2022-01-19 02:30:03,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7432249322493225 [2022-01-19 02:30:03,999 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1097 transitions. [2022-01-19 02:30:03,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1097 transitions. [2022-01-19 02:30:03,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:30:03,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1097 transitions. [2022-01-19 02:30:04,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:30:04,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:30:04,001 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:30:04,001 INFO L186 Difference]: Start difference. First operand has 841 places, 5267 transitions, 185093 flow. Second operand 18 states and 1097 transitions. [2022-01-19 02:30:04,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 5293 transitions, 195991 flow [2022-01-19 02:30:32,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 5293 transitions, 193291 flow, removed 1055 selfloop flow, removed 22 redundant places. [2022-01-19 02:30:32,301 INFO L242 Difference]: Finished difference. Result has 836 places, 5266 transitions, 184391 flow [2022-01-19 02:30:32,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=182399, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=184391, PETRI_PLACES=836, PETRI_TRANSITIONS=5266} [2022-01-19 02:30:32,305 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 764 predicate places. [2022-01-19 02:30:32,305 INFO L470 AbstractCegarLoop]: Abstraction has has 836 places, 5266 transitions, 184391 flow [2022-01-19 02:30:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:30:32,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:30:32,306 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:30:32,323 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 02:30:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:30:32,519 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:30:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:30:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1966582809, now seen corresponding path program 22 times [2022-01-19 02:30:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:30:32,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705329028] [2022-01-19 02:30:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:30:32,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:30:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:30:32,590 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 02:30:32,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:30:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705329028] [2022-01-19 02:30:32,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705329028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:30:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923072237] [2022-01-19 02:30:32,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:30:32,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:30:32,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:30:32,591 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 02:30:32,593 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 02:30:32,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:30:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:30:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:30:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:30:32,801 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 02:30:32,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:30:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:30:32,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923072237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:30:32,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:30:32,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 02:30:32,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827568819] [2022-01-19 02:30:32,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:30:32,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:30:32,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:30:32,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:30:32,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:30:32,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:30:32,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 5266 transitions, 184391 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:30:32,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:30:32,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:30:32,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:31:06,067 INFO L129 PetriNetUnfolder]: 6337/18556 cut-off events. [2022-01-19 02:31:06,067 INFO L130 PetriNetUnfolder]: For 1522455/1522455 co-relation queries the response was YES. [2022-01-19 02:31:06,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230565 conditions, 18556 events. 6337/18556 cut-off events. For 1522455/1522455 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 217696 event pairs, 282 based on Foata normal form. 71/18600 useless extension candidates. Maximal degree in co-relation 230309. Up to 7117 conditions per place. [2022-01-19 02:31:06,575 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1843 selfloop transitions, 3694 changer transitions 7/5589 dead transitions. [2022-01-19 02:31:06,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 5589 transitions, 204964 flow [2022-01-19 02:31:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 02:31:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 02:31:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2093 transitions. [2022-01-19 02:31:06,577 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7507173601147776 [2022-01-19 02:31:06,577 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2093 transitions. [2022-01-19 02:31:06,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2093 transitions. [2022-01-19 02:31:06,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:31:06,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2093 transitions. [2022-01-19 02:31:06,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.55882352941177) internal successors, (2093), 34 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:31:06,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:31:06,580 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:31:06,580 INFO L186 Difference]: Start difference. First operand has 836 places, 5266 transitions, 184391 flow. Second operand 34 states and 2093 transitions. [2022-01-19 02:31:06,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 5589 transitions, 204964 flow [2022-01-19 02:31:32,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 5589 transitions, 204437 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-01-19 02:31:32,926 INFO L242 Difference]: Finished difference. Result has 863 places, 5433 transitions, 204363 flow [2022-01-19 02:31:32,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=183407, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=204363, PETRI_PLACES=863, PETRI_TRANSITIONS=5433} [2022-01-19 02:31:32,930 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 791 predicate places. [2022-01-19 02:31:32,930 INFO L470 AbstractCegarLoop]: Abstraction has has 863 places, 5433 transitions, 204363 flow [2022-01-19 02:31:32,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:31:32,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:31:32,930 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:31:32,955 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 02:31:33,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:31:33,143 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:31:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:31:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1169067223, now seen corresponding path program 23 times [2022-01-19 02:31:33,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:31:33,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449417824] [2022-01-19 02:31:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:31:33,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:31:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:31:33,209 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 02:31:33,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:31:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449417824] [2022-01-19 02:31:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449417824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:31:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318279324] [2022-01-19 02:31:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:31:33,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:31:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:31:33,211 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 02:31:33,214 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 02:31:33,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:31:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:31:33,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:31:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:31:33,417 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 02:31:33,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:31:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:31:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318279324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:31:33,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:31:33,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-19 02:31:33,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538972242] [2022-01-19 02:31:33,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:31:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:31:33,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:31:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:31:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:31:33,550 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:31:33,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 5433 transitions, 204363 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:31:33,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:31:33,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:31:33,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:32:17,012 INFO L129 PetriNetUnfolder]: 6683/19593 cut-off events. [2022-01-19 02:32:17,013 INFO L130 PetriNetUnfolder]: For 1850363/1850363 co-relation queries the response was YES. [2022-01-19 02:32:17,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259876 conditions, 19593 events. 6683/19593 cut-off events. For 1850363/1850363 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 231483 event pairs, 246 based on Foata normal form. 86/19657 useless extension candidates. Maximal degree in co-relation 259613. Up to 5832 conditions per place. [2022-01-19 02:32:17,673 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1834 selfloop transitions, 4002 changer transitions 7/5888 dead transitions. [2022-01-19 02:32:17,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 894 places, 5888 transitions, 231487 flow [2022-01-19 02:32:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 02:32:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 02:32:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2222 transitions. [2022-01-19 02:32:17,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.752710027100271 [2022-01-19 02:32:17,675 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2222 transitions. [2022-01-19 02:32:17,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2222 transitions. [2022-01-19 02:32:17,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:32:17,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2222 transitions. [2022-01-19 02:32:17,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 61.72222222222222) internal successors, (2222), 36 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:32:17,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:32:17,678 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:32:17,678 INFO L186 Difference]: Start difference. First operand has 863 places, 5433 transitions, 204363 flow. Second operand 36 states and 2222 transitions. [2022-01-19 02:32:17,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 894 places, 5888 transitions, 231487 flow [2022-01-19 02:32:51,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 5888 transitions, 230003 flow, removed 421 selfloop flow, removed 21 redundant places. [2022-01-19 02:32:51,781 INFO L242 Difference]: Finished difference. Result has 886 places, 5703 transitions, 229792 flow [2022-01-19 02:32:51,784 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=202582, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=229792, PETRI_PLACES=886, PETRI_TRANSITIONS=5703} [2022-01-19 02:32:51,785 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 814 predicate places. [2022-01-19 02:32:51,785 INFO L470 AbstractCegarLoop]: Abstraction has has 886 places, 5703 transitions, 229792 flow [2022-01-19 02:32:51,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:32:51,785 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:32:51,785 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:32:51,813 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 02:32:52,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 02:32:52,003 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:32:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:32:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -691720079, now seen corresponding path program 24 times [2022-01-19 02:32:52,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:32:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555564021] [2022-01-19 02:32:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:32:52,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:32:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:32:52,063 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 02:32:52,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:32:52,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555564021] [2022-01-19 02:32:52,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555564021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:32:52,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630880688] [2022-01-19 02:32:52,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:32:52,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:32:52,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:32:52,064 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 02:32:52,065 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 02:32:52,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:32:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:32:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 02:32:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:32:52,263 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 02:32:52,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:32:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:32:52,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630880688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:32:52,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:32:52,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2022-01-19 02:32:52,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79103254] [2022-01-19 02:32:52,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:32:52,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 02:32:52,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:32:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 02:32:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-19 02:32:52,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-01-19 02:32:52,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 5703 transitions, 229792 flow. Second operand has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:32:52,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:32:52,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-01-19 02:32:52,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:33:41,925 INFO L129 PetriNetUnfolder]: 10360/32319 cut-off events. [2022-01-19 02:33:41,925 INFO L130 PetriNetUnfolder]: For 3247787/3248546 co-relation queries the response was YES. [2022-01-19 02:33:43,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429620 conditions, 32319 events. 10360/32319 cut-off events. For 3247787/3248546 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 417467 event pairs, 295 based on Foata normal form. 214/32418 useless extension candidates. Maximal degree in co-relation 429349. Up to 6901 conditions per place. [2022-01-19 02:33:44,096 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 2640 selfloop transitions, 2476 changer transitions 315/8121 dead transitions. [2022-01-19 02:33:44,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 8121 transitions, 355605 flow [2022-01-19 02:33:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 02:33:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 02:33:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2022-01-19 02:33:44,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-01-19 02:33:44,098 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2022-01-19 02:33:44,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2022-01-19 02:33:44,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:33:44,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2022-01-19 02:33:44,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:33:44,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:33:44,099 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:33:44,099 INFO L186 Difference]: Start difference. First operand has 886 places, 5703 transitions, 229792 flow. Second operand 7 states and 462 transitions. [2022-01-19 02:33:44,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 8121 transitions, 355605 flow [2022-01-19 02:35:02,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 8121 transitions, 353621 flow, removed 572 selfloop flow, removed 16 redundant places. [2022-01-19 02:35:02,946 INFO L242 Difference]: Finished difference. Result has 881 places, 7617 transitions, 332602 flow [2022-01-19 02:35:02,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=228353, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332602, PETRI_PLACES=881, PETRI_TRANSITIONS=7617} [2022-01-19 02:35:02,962 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 809 predicate places. [2022-01-19 02:35:02,962 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 7617 transitions, 332602 flow [2022-01-19 02:35:02,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:35:02,962 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:35:02,962 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 02:35:02,989 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 02:35:03,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 02:35:03,174 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:35:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:35:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash 221206373, now seen corresponding path program 25 times [2022-01-19 02:35:03,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:35:03,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071103408] [2022-01-19 02:35:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:35:03,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:35:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:03,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:35:03,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071103408] [2022-01-19 02:35:03,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071103408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:35:03,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468597531] [2022-01-19 02:35:03,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:35:03,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:35:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:35:03,267 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 02:35:03,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 02:35:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:35:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 02:35:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:35:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:03,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:35:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:35:03,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468597531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:35:03,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:35:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-19 02:35:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001962875] [2022-01-19 02:35:03,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:35:03,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 02:35:03,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:35:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 02:35:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-19 02:35:03,884 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-01-19 02:35:03,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 7617 transitions, 332602 flow. Second operand has 25 states, 25 states have (on average 59.2) internal successors, (1480), 25 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:35:03,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:35:03,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-01-19 02:35:03,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:37:11,770 INFO L129 PetriNetUnfolder]: 11508/34167 cut-off events. [2022-01-19 02:37:11,770 INFO L130 PetriNetUnfolder]: For 3888132/3888132 co-relation queries the response was YES. [2022-01-19 02:37:13,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487026 conditions, 34167 events. 11508/34167 cut-off events. For 3888132/3888132 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 438426 event pairs, 231 based on Foata normal form. 250/34357 useless extension candidates. Maximal degree in co-relation 486750. Up to 7166 conditions per place. [2022-01-19 02:37:14,184 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 1181 selfloop transitions, 8387 changer transitions 401/10014 dead transitions. [2022-01-19 02:37:14,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 946 places, 10014 transitions, 445885 flow [2022-01-19 02:37:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 02:37:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 02:37:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4173 transitions. [2022-01-19 02:37:14,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7483859397417504 [2022-01-19 02:37:14,187 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4173 transitions. [2022-01-19 02:37:14,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4173 transitions. [2022-01-19 02:37:14,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:37:14,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4173 transitions. [2022-01-19 02:37:14,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 61.36764705882353) internal successors, (4173), 68 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:37:14,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:37:14,193 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 82.0) internal successors, (5658), 69 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:37:14,193 INFO L186 Difference]: Start difference. First operand has 881 places, 7617 transitions, 332602 flow. Second operand 68 states and 4173 transitions. [2022-01-19 02:37:14,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 946 places, 10014 transitions, 445885 flow Received shutdown request... [2022-01-19 02:37:40,490 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 02:37:40,491 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 02:37:40,526 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 02:37:40,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 02:37:40,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 02:37:40,740 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 02:37:40,742 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 02:37:40,742 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 02:37:40,744 INFO L732 BasicCegarLoop]: Path program histogram: [25, 2, 1, 1] [2022-01-19 02:37:40,745 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 02:37:40,746 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 02:37:40,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:37:40 BasicIcfg [2022-01-19 02:37:40,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 02:37:40,747 INFO L158 Benchmark]: Toolchain (without parser) took 838159.92ms. Allocated memory was 360.7MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 310.7MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 7.3GB. Max. memory is 16.0GB. [2022-01-19 02:37:40,748 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 360.7MB. Free memory is still 327.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:37:40,748 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.50ms. Allocated memory is still 360.7MB. Free memory was 310.5MB in the beginning and 333.3MB in the end (delta: -22.8MB). Peak memory consumption was 17.7MB. Max. memory is 16.0GB. [2022-01-19 02:37:40,748 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.19ms. Allocated memory is still 360.7MB. Free memory was 333.3MB in the beginning and 331.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:37:40,748 INFO L158 Benchmark]: Boogie Preprocessor took 12.94ms. Allocated memory is still 360.7MB. Free memory was 331.9MB in the beginning and 330.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:37:40,748 INFO L158 Benchmark]: RCFGBuilder took 219.43ms. Allocated memory is still 360.7MB. Free memory was 330.7MB in the beginning and 317.7MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 02:37:40,748 INFO L158 Benchmark]: TraceAbstraction took 837734.40ms. Allocated memory was 360.7MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 317.2MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 7.3GB. Max. memory is 16.0GB. [2022-01-19 02:37:40,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 360.7MB. Free memory is still 327.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 169.50ms. Allocated memory is still 360.7MB. Free memory was 310.5MB in the beginning and 333.3MB in the end (delta: -22.8MB). Peak memory consumption was 17.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 20.19ms. Allocated memory is still 360.7MB. Free memory was 333.3MB in the beginning and 331.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 12.94ms. Allocated memory is still 360.7MB. Free memory was 331.9MB in the beginning and 330.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 219.43ms. Allocated memory is still 360.7MB. Free memory was 330.7MB in the beginning and 317.7MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 837734.40ms. Allocated memory was 360.7MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 317.2MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 7.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - 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 executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 837.6s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 819.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4020 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4020 mSDsluCounter, 2982 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4451 mSDsCounter, 1759 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14501 IncrementalHoareTripleChecker+Invalid, 16260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1759 mSolverCounterUnsat, 524 mSDtfsCounter, 14501 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4550 GetRequests, 3249 SyntacticMatches, 33 SemanticMatches, 1268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22191 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=332602occurred in iteration=28, InterpolantAutomatonStates: 925, 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, 0.6s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 3793 NumberOfCodeBlocks, 3768 NumberOfCodeBlocksAsserted, 88 NumberOfCheckSat, 5457 ConstructedInterpolants, 0 QuantifiedInterpolants, 16798 SizeOfPredicates, 233 NumberOfNonLiveVariables, 3954 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 80 InterpolantComputations, 4 PerfectInterpolantSequences, 348/585 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