/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-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 01:45:25,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 01:45:25,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 01:45:25,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 01:45:25,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 01:45:25,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 01:45:25,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 01:45:25,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 01:45:25,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 01:45:25,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 01:45:25,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 01:45:25,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 01:45:25,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 01:45:25,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 01:45:25,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 01:45:25,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 01:45:25,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 01:45:25,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 01:45:25,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 01:45:25,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 01:45:25,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 01:45:25,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 01:45:25,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 01:45:25,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 01:45:25,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 01:45:25,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 01:45:25,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 01:45:25,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 01:45:25,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 01:45:25,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 01:45:25,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 01:45:25,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 01:45:25,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 01:45:25,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 01:45:25,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 01:45:25,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 01:45:25,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 01:45:25,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 01:45:25,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 01:45:25,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 01:45:25,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 01:45:25,939 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 01:45:25,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 01:45:25,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 01:45:25,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 01:45:25,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 01:45:25,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 01:45:25,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 01:45:25,968 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 01:45:25,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 01:45:25,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 01:45:25,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 01:45:25,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 01:45:25,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 01:45:25,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 01:45:25,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 01:45:25,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 01:45:25,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 01:45:25,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 01:45:25,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:45:25,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 01:45:25,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 01:45:25,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 01:45:25,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 01:45:25,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 01:45:25,972 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 01:45:25,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 01:45:25,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 01:45:26,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 01:45:26,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 01:45:26,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 01:45:26,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 01:45:26,203 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 01:45:26,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-01-19 01:45:26,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d5b8c16/448abd4bb49349d8aae8df88d0cddddc/FLAGdf9722270 [2022-01-19 01:45:26,587 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 01:45:26,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-01-19 01:45:26,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d5b8c16/448abd4bb49349d8aae8df88d0cddddc/FLAGdf9722270 [2022-01-19 01:45:26,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d5b8c16/448abd4bb49349d8aae8df88d0cddddc [2022-01-19 01:45:26,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 01:45:26,606 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 01:45:26,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 01:45:26,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 01:45:26,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 01:45:26,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7fd744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26, skipping insertion in model container [2022-01-19 01:45:26,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 01:45:26,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 01:45:26,784 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-figure3.wvr.c[2121,2134] [2022-01-19 01:45:26,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:45:26,799 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 01:45:26,821 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-figure3.wvr.c[2121,2134] [2022-01-19 01:45:26,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:45:26,830 INFO L208 MainTranslator]: Completed translation [2022-01-19 01:45:26,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26 WrapperNode [2022-01-19 01:45:26,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 01:45:26,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 01:45:26,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 01:45:26,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 01:45:26,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,865 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-01-19 01:45:26,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 01:45:26,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 01:45:26,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 01:45:26,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 01:45:26,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 01:45:26,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 01:45:26,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 01:45:26,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 01:45:26,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (1/1) ... [2022-01-19 01:45:26,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:45:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:26,918 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 01:45:26,932 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 01:45:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 01:45:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 01:45:26,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 01:45:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 01:45:26,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 01:45:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 01:45:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 01:45:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 01:45:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 01:45:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 01:45:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 01:45:26,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 01:45:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 01:45:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 01:45:26,957 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 01:45:27,011 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 01:45:27,012 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 01:45:27,161 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 01:45:27,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 01:45:27,204 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 01:45:27,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:45:27 BoogieIcfgContainer [2022-01-19 01:45:27,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 01:45:27,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 01:45:27,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 01:45:27,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 01:45:27,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:45:26" (1/3) ... [2022-01-19 01:45:27,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d13f73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:45:27, skipping insertion in model container [2022-01-19 01:45:27,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:45:26" (2/3) ... [2022-01-19 01:45:27,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d13f73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:45:27, skipping insertion in model container [2022-01-19 01:45:27,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:45:27" (3/3) ... [2022-01-19 01:45:27,213 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-01-19 01:45:27,219 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 01:45:27,220 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 01:45:27,220 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 01:45:27,294 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,295 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,295 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,295 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,296 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,296 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,296 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,297 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,297 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,297 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,297 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,297 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,298 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,298 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,298 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,298 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,298 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,298 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,299 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,299 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,299 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,300 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,300 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,300 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,301 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,301 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,301 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,301 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,301 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,302 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,302 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,302 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,303 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,303 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,303 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,303 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,303 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,303 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,304 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,306 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,306 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,306 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,307 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:45:27,320 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 01:45:27,373 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 01:45:27,378 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 01:45:27,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 01:45:27,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-01-19 01:45:27,441 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-01-19 01:45:27,442 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:45:27,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-01-19 01:45:27,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-01-19 01:45:27,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-01-19 01:45:27,475 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-01-19 01:45:27,475 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:45:27,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:27,476 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:27,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1603327647, now seen corresponding path program 1 times [2022-01-19 01:45:27,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:27,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816732665] [2022-01-19 01:45:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:27,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:27,691 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 01:45:27,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816732665] [2022-01-19 01:45:27,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816732665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:27,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:27,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 01:45:27,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313390913] [2022-01-19 01:45:27,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:27,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 01:45:27,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 01:45:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 01:45:27,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2022-01-19 01:45:27,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:27,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:27,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2022-01-19 01:45:27,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:27,838 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2022-01-19 01:45:27,838 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-01-19 01:45:27,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2022-01-19 01:45:27,840 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-01-19 01:45:27,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2022-01-19 01:45:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 01:45:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 01:45:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-01-19 01:45:27,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2022-01-19 01:45:27,866 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-01-19 01:45:27,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-01-19 01:45:27,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:27,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-01-19 01:45:27,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:27,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:27,878 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:27,879 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2022-01-19 01:45:27,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2022-01-19 01:45:27,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 01:45:27,884 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-01-19 01:45:27,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-01-19 01:45:27,888 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-01-19 01:45:27,888 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-01-19 01:45:27,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:27,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:27,888 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:27,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 01:45:27,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-01-19 01:45:27,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672827899] [2022-01-19 01:45:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:27,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:28,034 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 01:45:28,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672827899] [2022-01-19 01:45:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672827899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:28,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:45:28,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076871037] [2022-01-19 01:45:28,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:28,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:45:28,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:45:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:45:28,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 01:45:28,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:28,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 01:45:28,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:28,131 INFO L129 PetriNetUnfolder]: 8/111 cut-off events. [2022-01-19 01:45:28,132 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-01-19 01:45:28,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2022-01-19 01:45:28,134 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2022-01-19 01:45:28,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2022-01-19 01:45:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 01:45:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 01:45:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-01-19 01:45:28,141 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2022-01-19 01:45:28,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-01-19 01:45:28,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-01-19 01:45:28,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:28,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-01-19 01:45:28,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,149 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2022-01-19 01:45:28,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2022-01-19 01:45:28,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 01:45:28,153 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2022-01-19 01:45:28,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-01-19 01:45:28,155 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2022-01-19 01:45:28,155 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2022-01-19 01:45:28,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:28,156 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 01:45:28,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 01:45:28,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash -824748536, now seen corresponding path program 1 times [2022-01-19 01:45:28,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:28,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316175822] [2022-01-19 01:45:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:28,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:28,361 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 01:45:28,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:28,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316175822] [2022-01-19 01:45:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316175822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:28,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914842227] [2022-01-19 01:45:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:28,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:28,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:28,371 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 01:45:28,411 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 01:45:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 01:45:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:28,682 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 01:45:28,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:28,806 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 01:45:28,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914842227] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:28,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 01:45:28,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-01-19 01:45:28,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105190553] [2022-01-19 01:45:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:28,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 01:45:28,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 01:45:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-19 01:45:28,809 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-01-19 01:45:28,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:28,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-01-19 01:45:28,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:28,862 INFO L129 PetriNetUnfolder]: 42/189 cut-off events. [2022-01-19 01:45:28,863 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-01-19 01:45:28,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 189 events. 42/189 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 706 event pairs, 12 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 300. Up to 38 conditions per place. [2022-01-19 01:45:28,864 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 5 changer transitions 3/83 dead transitions. [2022-01-19 01:45:28,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 242 flow [2022-01-19 01:45:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 01:45:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 01:45:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-01-19 01:45:28,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2022-01-19 01:45:28,866 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-01-19 01:45:28,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-01-19 01:45:28,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:28,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-01-19 01:45:28,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,869 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 4 states and 299 transitions. [2022-01-19 01:45:28,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 242 flow [2022-01-19 01:45:28,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 236 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 01:45:28,872 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 192 flow [2022-01-19 01:45:28,872 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-01-19 01:45:28,873 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-01-19 01:45:28,873 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 192 flow [2022-01-19 01:45:28,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:28,873 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:28,874 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 01:45:28,897 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 01:45:29,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:29,097 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 565393570, now seen corresponding path program 2 times [2022-01-19 01:45:29,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:29,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071791972] [2022-01-19 01:45:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:29,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:29,205 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 01:45:29,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071791972] [2022-01-19 01:45:29,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071791972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:29,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:29,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:45:29,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928437481] [2022-01-19 01:45:29,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:29,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:45:29,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:45:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:45:29,208 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 01:45:29,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:29,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:29,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 01:45:29,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:29,317 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2022-01-19 01:45:29,318 INFO L130 PetriNetUnfolder]: For 115/124 co-relation queries the response was YES. [2022-01-19 01:45:29,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 313 events. 85/313 cut-off events. For 115/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1507 event pairs, 28 based on Foata normal form. 7/313 useless extension candidates. Maximal degree in co-relation 637. Up to 107 conditions per place. [2022-01-19 01:45:29,321 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 38 selfloop transitions, 8 changer transitions 11/111 dead transitions. [2022-01-19 01:45:29,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 438 flow [2022-01-19 01:45:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:45:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:45:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2022-01-19 01:45:29,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448275862068966 [2022-01-19 01:45:29,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2022-01-19 01:45:29,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2022-01-19 01:45:29,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:29,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2022-01-19 01:45:29,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:29,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:29,328 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:29,328 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 192 flow. Second operand 6 states and 441 transitions. [2022-01-19 01:45:29,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 438 flow [2022-01-19 01:45:29,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 01:45:29,336 INFO L242 Difference]: Finished difference. Result has 89 places, 82 transitions, 268 flow [2022-01-19 01:45:29,336 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2022-01-19 01:45:29,337 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2022-01-19 01:45:29,337 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 268 flow [2022-01-19 01:45:29,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:29,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:29,338 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 01:45:29,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 01:45:29,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1895955256, now seen corresponding path program 3 times [2022-01-19 01:45:29,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:29,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307374593] [2022-01-19 01:45:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:29,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:29,447 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 01:45:29,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307374593] [2022-01-19 01:45:29,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307374593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588707192] [2022-01-19 01:45:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:45:29,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:29,450 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 01:45:29,454 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 01:45:29,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:45:29,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 01:45:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:29,721 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 01:45:29,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:29,875 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 01:45:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588707192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:29,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:29,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 01:45:29,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247576477] [2022-01-19 01:45:29,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:29,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 01:45:29,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 01:45:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-19 01:45:29,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 01:45:29,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 268 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:29,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:29,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 01:45:29,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:30,032 INFO L129 PetriNetUnfolder]: 111/369 cut-off events. [2022-01-19 01:45:30,032 INFO L130 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2022-01-19 01:45:30,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 369 events. 111/369 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1628 event pairs, 19 based on Foata normal form. 9/371 useless extension candidates. Maximal degree in co-relation 931. Up to 83 conditions per place. [2022-01-19 01:45:30,035 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 47 selfloop transitions, 20 changer transitions 2/123 dead transitions. [2022-01-19 01:45:30,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 594 flow [2022-01-19 01:45:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 01:45:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 01:45:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 578 transitions. [2022-01-19 01:45:30,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8304597701149425 [2022-01-19 01:45:30,038 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 578 transitions. [2022-01-19 01:45:30,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 578 transitions. [2022-01-19 01:45:30,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:30,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 578 transitions. [2022-01-19 01:45:30,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.25) internal successors, (578), 8 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,041 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,042 INFO L186 Difference]: Start difference. First operand has 89 places, 82 transitions, 268 flow. Second operand 8 states and 578 transitions. [2022-01-19 01:45:30,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 594 flow [2022-01-19 01:45:30,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 588 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-01-19 01:45:30,047 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 427 flow [2022-01-19 01:45:30,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2022-01-19 01:45:30,048 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2022-01-19 01:45:30,048 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 427 flow [2022-01-19 01:45:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,048 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:30,048 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 01:45:30,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:30,263 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 01:45:30,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2095100888, now seen corresponding path program 4 times [2022-01-19 01:45:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447687176] [2022-01-19 01:45:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:30,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:30,322 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 01:45:30,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:30,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447687176] [2022-01-19 01:45:30,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447687176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:45:30,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:45:30,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:45:30,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780453132] [2022-01-19 01:45:30,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:45:30,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:45:30,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:45:30,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:45:30,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 01:45:30,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:30,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 01:45:30,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:30,416 INFO L129 PetriNetUnfolder]: 110/332 cut-off events. [2022-01-19 01:45:30,417 INFO L130 PetriNetUnfolder]: For 773/775 co-relation queries the response was YES. [2022-01-19 01:45:30,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 332 events. 110/332 cut-off events. For 773/775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1380 event pairs, 40 based on Foata normal form. 2/327 useless extension candidates. Maximal degree in co-relation 1046. Up to 120 conditions per place. [2022-01-19 01:45:30,421 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 2/102 dead transitions. [2022-01-19 01:45:30,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 102 transitions, 570 flow [2022-01-19 01:45:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:45:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:45:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 421 transitions. [2022-01-19 01:45:30,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8065134099616859 [2022-01-19 01:45:30,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 421 transitions. [2022-01-19 01:45:30,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 421 transitions. [2022-01-19 01:45:30,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:30,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 421 transitions. [2022-01-19 01:45:30,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.16666666666667) internal successors, (421), 6 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,426 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,426 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 427 flow. Second operand 6 states and 421 transitions. [2022-01-19 01:45:30,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 102 transitions, 570 flow [2022-01-19 01:45:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 550 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-01-19 01:45:30,435 INFO L242 Difference]: Finished difference. Result has 105 places, 93 transitions, 440 flow [2022-01-19 01:45:30,435 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2022-01-19 01:45:30,437 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 28 predicate places. [2022-01-19 01:45:30,437 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 440 flow [2022-01-19 01:45:30,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:30,438 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:30,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 01:45:30,438 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-01-19 01:45:30,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929663706] [2022-01-19 01:45:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:30,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:30,577 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 01:45:30,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929663706] [2022-01-19 01:45:30,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929663706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308939288] [2022-01-19 01:45:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:30,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:30,579 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 01:45:30,608 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 01:45:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 01:45:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:30,786 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 01:45:30,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:30,930 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 01:45:30,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308939288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:30,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:30,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-01-19 01:45:30,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142545374] [2022-01-19 01:45:30,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 01:45:30,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 01:45:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-19 01:45:30,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:30,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:30,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:30,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:30,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:31,037 INFO L129 PetriNetUnfolder]: 61/380 cut-off events. [2022-01-19 01:45:31,038 INFO L130 PetriNetUnfolder]: For 829/850 co-relation queries the response was YES. [2022-01-19 01:45:31,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 380 events. 61/380 cut-off events. For 829/850 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1898 event pairs, 13 based on Foata normal form. 11/384 useless extension candidates. Maximal degree in co-relation 967. Up to 45 conditions per place. [2022-01-19 01:45:31,041 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 22 selfloop transitions, 7 changer transitions 5/109 dead transitions. [2022-01-19 01:45:31,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 109 transitions, 552 flow [2022-01-19 01:45:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 01:45:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 01:45:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-01-19 01:45:31,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-01-19 01:45:31,043 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-01-19 01:45:31,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-01-19 01:45:31,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:31,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-01-19 01:45:31,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:31,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:31,046 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:31,046 INFO L186 Difference]: Start difference. First operand has 105 places, 93 transitions, 440 flow. Second operand 7 states and 476 transitions. [2022-01-19 01:45:31,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 109 transitions, 552 flow [2022-01-19 01:45:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 518 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-01-19 01:45:31,051 INFO L242 Difference]: Finished difference. Result has 107 places, 96 transitions, 454 flow [2022-01-19 01:45:31,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2022-01-19 01:45:31,053 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2022-01-19 01:45:31,053 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 454 flow [2022-01-19 01:45:31,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:31,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:31,053 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:31,079 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 01:45:31,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:31,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash -664902924, now seen corresponding path program 2 times [2022-01-19 01:45:31,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:31,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418490242] [2022-01-19 01:45:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:31,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:31,401 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 01:45:31,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418490242] [2022-01-19 01:45:31,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418490242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:31,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654314537] [2022-01-19 01:45:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:45:31,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:31,403 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 01:45:31,428 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 01:45:31,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:45:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:31,706 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 01:45:31,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:31,947 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 01:45:31,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654314537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:31,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:31,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 01:45:31,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691800732] [2022-01-19 01:45:31,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:31,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 01:45:31,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 01:45:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-19 01:45:31,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:31,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 454 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:31,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:31,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:31,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:32,613 INFO L129 PetriNetUnfolder]: 343/992 cut-off events. [2022-01-19 01:45:32,613 INFO L130 PetriNetUnfolder]: For 2196/2202 co-relation queries the response was YES. [2022-01-19 01:45:32,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 992 events. 343/992 cut-off events. For 2196/2202 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6084 event pairs, 60 based on Foata normal form. 5/992 useless extension candidates. Maximal degree in co-relation 3146. Up to 170 conditions per place. [2022-01-19 01:45:32,622 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 89 selfloop transitions, 46 changer transitions 9/198 dead transitions. [2022-01-19 01:45:32,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 1378 flow [2022-01-19 01:45:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 01:45:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 01:45:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1556 transitions. [2022-01-19 01:45:32,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7776111944027986 [2022-01-19 01:45:32,626 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1556 transitions. [2022-01-19 01:45:32,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1556 transitions. [2022-01-19 01:45:32,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:32,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1556 transitions. [2022-01-19 01:45:32,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.65217391304348) internal successors, (1556), 23 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:32,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:32,635 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:32,635 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 454 flow. Second operand 23 states and 1556 transitions. [2022-01-19 01:45:32,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 1378 flow [2022-01-19 01:45:32,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 198 transitions, 1352 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-01-19 01:45:32,643 INFO L242 Difference]: Finished difference. Result has 138 places, 128 transitions, 865 flow [2022-01-19 01:45:32,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=865, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2022-01-19 01:45:32,645 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 61 predicate places. [2022-01-19 01:45:32,645 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 865 flow [2022-01-19 01:45:32,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:32,646 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:32,646 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:32,674 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 01:45:32,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:32,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1281276886, now seen corresponding path program 3 times [2022-01-19 01:45:32,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776284679] [2022-01-19 01:45:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:32,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:32,990 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 01:45:32,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776284679] [2022-01-19 01:45:32,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776284679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758010343] [2022-01-19 01:45:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:45:32,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:32,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:32,993 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 01:45:33,015 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 01:45:33,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:45:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:45:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:33,250 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 01:45:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:33,439 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 01:45:33,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758010343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:33,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:33,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 01:45:33,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748120137] [2022-01-19 01:45:33,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:33,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 01:45:33,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 01:45:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-19 01:45:33,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:33,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 865 flow. Second operand has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:33,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:33,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:33,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:34,739 INFO L129 PetriNetUnfolder]: 510/1339 cut-off events. [2022-01-19 01:45:34,739 INFO L130 PetriNetUnfolder]: For 5950/5958 co-relation queries the response was YES. [2022-01-19 01:45:34,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5665 conditions, 1339 events. 510/1339 cut-off events. For 5950/5958 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8575 event pairs, 25 based on Foata normal form. 22/1352 useless extension candidates. Maximal degree in co-relation 5633. Up to 143 conditions per place. [2022-01-19 01:45:34,756 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 132 selfloop transitions, 174 changer transitions 12/372 dead transitions. [2022-01-19 01:45:34,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 372 transitions, 3609 flow [2022-01-19 01:45:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 01:45:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 01:45:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2022-01-19 01:45:34,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7759843482514062 [2022-01-19 01:45:34,767 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2022-01-19 01:45:34,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2022-01-19 01:45:34,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:34,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2022-01-19 01:45:34,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.51063829787235) internal successors, (3173), 47 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:34,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:34,813 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:34,813 INFO L186 Difference]: Start difference. First operand has 138 places, 128 transitions, 865 flow. Second operand 47 states and 3173 transitions. [2022-01-19 01:45:34,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 372 transitions, 3609 flow [2022-01-19 01:45:34,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 372 transitions, 3318 flow, removed 110 selfloop flow, removed 10 redundant places. [2022-01-19 01:45:34,839 INFO L242 Difference]: Finished difference. Result has 186 places, 264 transitions, 2469 flow [2022-01-19 01:45:34,839 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2469, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2022-01-19 01:45:34,839 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2022-01-19 01:45:34,839 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 2469 flow [2022-01-19 01:45:34,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:34,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:34,840 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:34,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 01:45:35,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:35,056 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1077969640, now seen corresponding path program 4 times [2022-01-19 01:45:35,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:35,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928270880] [2022-01-19 01:45:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:35,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:35,171 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 01:45:35,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928270880] [2022-01-19 01:45:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928270880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616919440] [2022-01-19 01:45:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:45:35,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:35,173 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 01:45:35,175 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 01:45:35,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:45:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:45:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:35,401 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 01:45:35,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:35,603 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 01:45:35,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616919440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:35,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:35,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:45:35,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654914403] [2022-01-19 01:45:35,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:35,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:45:35,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:45:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:45:35,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:35,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 2469 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:35,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:35,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:35,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:37,495 INFO L129 PetriNetUnfolder]: 709/2014 cut-off events. [2022-01-19 01:45:37,496 INFO L130 PetriNetUnfolder]: For 13737/13746 co-relation queries the response was YES. [2022-01-19 01:45:37,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 2014 events. 709/2014 cut-off events. For 13737/13746 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15185 event pairs, 7 based on Foata normal form. 10/2017 useless extension candidates. Maximal degree in co-relation 9543. Up to 218 conditions per place. [2022-01-19 01:45:37,521 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 225 selfloop transitions, 264 changer transitions 39/582 dead transitions. [2022-01-19 01:45:37,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 582 transitions, 6856 flow [2022-01-19 01:45:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-19 01:45:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-01-19 01:45:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4777 transitions. [2022-01-19 01:45:37,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733527602395985 [2022-01-19 01:45:37,530 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4777 transitions. [2022-01-19 01:45:37,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4777 transitions. [2022-01-19 01:45:37,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:37,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4777 transitions. [2022-01-19 01:45:37,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 67.28169014084507) internal successors, (4777), 71 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,558 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,558 INFO L186 Difference]: Start difference. First operand has 186 places, 264 transitions, 2469 flow. Second operand 71 states and 4777 transitions. [2022-01-19 01:45:37,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 582 transitions, 6856 flow [2022-01-19 01:45:37,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 582 transitions, 6408 flow, removed 149 selfloop flow, removed 2 redundant places. [2022-01-19 01:45:37,634 INFO L242 Difference]: Finished difference. Result has 277 places, 417 transitions, 4636 flow [2022-01-19 01:45:37,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4636, PETRI_PLACES=277, PETRI_TRANSITIONS=417} [2022-01-19 01:45:37,636 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 200 predicate places. [2022-01-19 01:45:37,636 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 417 transitions, 4636 flow [2022-01-19 01:45:37,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:37,637 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:37,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:37,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:37,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1322624998, now seen corresponding path program 5 times [2022-01-19 01:45:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382057205] [2022-01-19 01:45:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:37,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:37,994 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 01:45:37,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382057205] [2022-01-19 01:45:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382057205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:37,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253755109] [2022-01-19 01:45:37,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:45:37,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:37,996 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 01:45:38,023 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 01:45:38,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:38,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 01:45:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:38,284 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 01:45:38,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:45:38,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253755109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:38,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:38,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 01:45:38,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534123534] [2022-01-19 01:45:38,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:38,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 01:45:38,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 01:45:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-19 01:45:38,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:38,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 417 transitions, 4636 flow. Second operand has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:38,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:38,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:38,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:40,947 INFO L129 PetriNetUnfolder]: 1218/3588 cut-off events. [2022-01-19 01:45:40,947 INFO L130 PetriNetUnfolder]: For 57806/57820 co-relation queries the response was YES. [2022-01-19 01:45:40,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20377 conditions, 3588 events. 1218/3588 cut-off events. For 57806/57820 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31670 event pairs, 67 based on Foata normal form. 34/3604 useless extension candidates. Maximal degree in co-relation 20309. Up to 430 conditions per place. [2022-01-19 01:45:41,002 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 251 selfloop transitions, 554 changer transitions 5/864 dead transitions. [2022-01-19 01:45:41,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 864 transitions, 11929 flow [2022-01-19 01:45:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 01:45:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 01:45:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3657 transitions. [2022-01-19 01:45:41,007 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7784163473818646 [2022-01-19 01:45:41,007 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3657 transitions. [2022-01-19 01:45:41,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3657 transitions. [2022-01-19 01:45:41,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:41,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3657 transitions. [2022-01-19 01:45:41,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 67.72222222222223) internal successors, (3657), 54 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:41,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:41,020 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:41,020 INFO L186 Difference]: Start difference. First operand has 277 places, 417 transitions, 4636 flow. Second operand 54 states and 3657 transitions. [2022-01-19 01:45:41,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 864 transitions, 11929 flow [2022-01-19 01:45:41,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 864 transitions, 10547 flow, removed 608 selfloop flow, removed 6 redundant places. [2022-01-19 01:45:41,344 INFO L242 Difference]: Finished difference. Result has 337 places, 713 transitions, 9140 flow [2022-01-19 01:45:41,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9140, PETRI_PLACES=337, PETRI_TRANSITIONS=713} [2022-01-19 01:45:41,346 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 260 predicate places. [2022-01-19 01:45:41,346 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 713 transitions, 9140 flow [2022-01-19 01:45:41,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:41,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:41,351 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:41,367 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 01:45:41,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:41,552 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1299198750, now seen corresponding path program 6 times [2022-01-19 01:45:41,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010457286] [2022-01-19 01:45:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:41,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:41,682 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 01:45:41,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010457286] [2022-01-19 01:45:41,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010457286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358557553] [2022-01-19 01:45:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:45:41,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:41,683 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 01:45:41,684 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 01:45:41,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 01:45:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:41,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:45:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:41,933 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 01:45:41,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:42,129 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 01:45:42,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358557553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:42,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:42,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-19 01:45:42,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207933126] [2022-01-19 01:45:42,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:42,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 01:45:42,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:42,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 01:45:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-19 01:45:42,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:42,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 713 transitions, 9140 flow. Second operand has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:42,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:42,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:42,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:45,531 INFO L129 PetriNetUnfolder]: 1744/5140 cut-off events. [2022-01-19 01:45:45,532 INFO L130 PetriNetUnfolder]: For 87893/87911 co-relation queries the response was YES. [2022-01-19 01:45:45,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30648 conditions, 5140 events. 1744/5140 cut-off events. For 87893/87911 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49796 event pairs, 53 based on Foata normal form. 36/5152 useless extension candidates. Maximal degree in co-relation 30564. Up to 665 conditions per place. [2022-01-19 01:45:45,694 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 255 selfloop transitions, 887 changer transitions 11/1207 dead transitions. [2022-01-19 01:45:45,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1207 transitions, 18397 flow [2022-01-19 01:45:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-19 01:45:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-01-19 01:45:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7221 transitions. [2022-01-19 01:45:45,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2022-01-19 01:45:45,705 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7221 transitions. [2022-01-19 01:45:45,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7221 transitions. [2022-01-19 01:45:45,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:45,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7221 transitions. [2022-01-19 01:45:45,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.86111111111111) internal successors, (7221), 108 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:45,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:45,736 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:45,736 INFO L186 Difference]: Start difference. First operand has 337 places, 713 transitions, 9140 flow. Second operand 108 states and 7221 transitions. [2022-01-19 01:45:45,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1207 transitions, 18397 flow [2022-01-19 01:45:46,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1207 transitions, 18138 flow, removed 123 selfloop flow, removed 4 redundant places. [2022-01-19 01:45:46,106 INFO L242 Difference]: Finished difference. Result has 471 places, 1049 transitions, 16429 flow [2022-01-19 01:45:46,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9087, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=16429, PETRI_PLACES=471, PETRI_TRANSITIONS=1049} [2022-01-19 01:45:46,107 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 394 predicate places. [2022-01-19 01:45:46,108 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 1049 transitions, 16429 flow [2022-01-19 01:45:46,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:46,108 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:46,108 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:46,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:46,321 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,SelfDestructingSolverStorable11 [2022-01-19 01:45:46,322 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1287637296, now seen corresponding path program 7 times [2022-01-19 01:45:46,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:46,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294964844] [2022-01-19 01:45:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:46,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:46,422 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 01:45:46,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:46,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294964844] [2022-01-19 01:45:46,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294964844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:46,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617033518] [2022-01-19 01:45:46,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:45:46,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:46,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:46,424 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 01:45:46,425 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 01:45:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:46,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:45:46,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:46,683 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 01:45:46,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:46,869 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 01:45:46,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617033518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:46,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:46,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:45:46,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079352957] [2022-01-19 01:45:46,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:46,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:45:46,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:45:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:45:46,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:46,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1049 transitions, 16429 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:46,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:46,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:46,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:50,447 INFO L129 PetriNetUnfolder]: 2332/6723 cut-off events. [2022-01-19 01:45:50,447 INFO L130 PetriNetUnfolder]: For 149849/149865 co-relation queries the response was YES. [2022-01-19 01:45:50,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45589 conditions, 6723 events. 2332/6723 cut-off events. For 149849/149865 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 68695 event pairs, 88 based on Foata normal form. 36/6731 useless extension candidates. Maximal degree in co-relation 45475. Up to 854 conditions per place. [2022-01-19 01:45:50,612 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 282 selfloop transitions, 1271 changer transitions 6/1613 dead transitions. [2022-01-19 01:45:50,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1613 transitions, 28646 flow [2022-01-19 01:45:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-19 01:45:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-01-19 01:45:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-01-19 01:45:50,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-01-19 01:45:50,625 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-01-19 01:45:50,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-01-19 01:45:50,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:50,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-01-19 01:45:50,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,642 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:50,643 INFO L186 Difference]: Start difference. First operand has 471 places, 1049 transitions, 16429 flow. Second operand 79 states and 5263 transitions. [2022-01-19 01:45:50,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1613 transitions, 28646 flow [2022-01-19 01:45:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1613 transitions, 27473 flow, removed 291 selfloop flow, removed 30 redundant places. [2022-01-19 01:45:51,648 INFO L242 Difference]: Finished difference. Result has 552 places, 1519 transitions, 27372 flow [2022-01-19 01:45:51,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15527, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27372, PETRI_PLACES=552, PETRI_TRANSITIONS=1519} [2022-01-19 01:45:51,649 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 475 predicate places. [2022-01-19 01:45:51,649 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 1519 transitions, 27372 flow [2022-01-19 01:45:51,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:51,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:51,650 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:51,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-19 01:45:51,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 01:45:51,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 41325334, now seen corresponding path program 8 times [2022-01-19 01:45:51,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:51,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434557838] [2022-01-19 01:45:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:51,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:51,967 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 01:45:51,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434557838] [2022-01-19 01:45:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434557838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5333260] [2022-01-19 01:45:51,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:45:51,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:51,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:51,969 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 01:45:52,031 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 01:45:52,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:52,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:52,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:45:52,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:52,219 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 01:45:52,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:52,436 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 01:45:52,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5333260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:52,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:52,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 01:45:52,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245577251] [2022-01-19 01:45:52,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:52,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 01:45:52,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 01:45:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-19 01:45:52,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:45:52,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1519 transitions, 27372 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:52,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:45:52,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:58,638 INFO L129 PetriNetUnfolder]: 3627/10432 cut-off events. [2022-01-19 01:45:58,639 INFO L130 PetriNetUnfolder]: For 268855/268873 co-relation queries the response was YES. [2022-01-19 01:45:58,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77244 conditions, 10432 events. 3627/10432 cut-off events. For 268855/268873 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 114513 event pairs, 307 based on Foata normal form. 16/10297 useless extension candidates. Maximal degree in co-relation 77101. Up to 1646 conditions per place. [2022-01-19 01:45:58,840 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 866 selfloop transitions, 1692 changer transitions 6/2618 dead transitions. [2022-01-19 01:45:58,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 2618 transitions, 53706 flow [2022-01-19 01:45:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-19 01:45:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-01-19 01:45:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6267 transitions. [2022-01-19 01:45:58,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7663242846661775 [2022-01-19 01:45:58,850 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6267 transitions. [2022-01-19 01:45:58,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6267 transitions. [2022-01-19 01:45:58,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:58,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6267 transitions. [2022-01-19 01:45:58,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 66.67021276595744) internal successors, (6267), 94 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:58,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:58,870 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:58,870 INFO L186 Difference]: Start difference. First operand has 552 places, 1519 transitions, 27372 flow. Second operand 94 states and 6267 transitions. [2022-01-19 01:45:58,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 2618 transitions, 53706 flow [2022-01-19 01:46:01,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 2618 transitions, 53459 flow, removed 49 selfloop flow, removed 13 redundant places. [2022-01-19 01:46:01,917 INFO L242 Difference]: Finished difference. Result has 662 places, 2435 transitions, 51170 flow [2022-01-19 01:46:01,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=27165, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=51170, PETRI_PLACES=662, PETRI_TRANSITIONS=2435} [2022-01-19 01:46:01,919 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 585 predicate places. [2022-01-19 01:46:01,919 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 2435 transitions, 51170 flow [2022-01-19 01:46:01,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:01,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:01,920 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:01,936 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 01:46:02,120 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,SelfDestructingSolverStorable13 [2022-01-19 01:46:02,121 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1361762118, now seen corresponding path program 9 times [2022-01-19 01:46:02,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:02,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433790919] [2022-01-19 01:46:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:02,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:02,233 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 01:46:02,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:02,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433790919] [2022-01-19 01:46:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433790919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919506154] [2022-01-19 01:46:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:46:02,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:02,235 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 01:46:02,236 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 01:46:02,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 01:46:02,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:46:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:02,461 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 01:46:02,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:02,650 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 01:46:02,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919506154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:02,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:02,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 01:46:02,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760622058] [2022-01-19 01:46:02,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:02,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 01:46:02,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 01:46:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-19 01:46:02,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:46:02,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 2435 transitions, 51170 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:02,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:02,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:46:02,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:12,075 INFO L129 PetriNetUnfolder]: 4556/13004 cut-off events. [2022-01-19 01:46:12,076 INFO L130 PetriNetUnfolder]: For 431492/431524 co-relation queries the response was YES. [2022-01-19 01:46:12,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108838 conditions, 13004 events. 4556/13004 cut-off events. For 431492/431524 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 147728 event pairs, 381 based on Foata normal form. 15/12822 useless extension candidates. Maximal degree in co-relation 108666. Up to 2428 conditions per place. [2022-01-19 01:46:12,315 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1162 selfloop transitions, 1811 changer transitions 6/3033 dead transitions. [2022-01-19 01:46:12,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3033 transitions, 70163 flow [2022-01-19 01:46:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 01:46:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 01:46:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3864 transitions. [2022-01-19 01:46:12,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779189352692075 [2022-01-19 01:46:12,320 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3864 transitions. [2022-01-19 01:46:12,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3864 transitions. [2022-01-19 01:46:12,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:12,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3864 transitions. [2022-01-19 01:46:12,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 67.78947368421052) internal successors, (3864), 57 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:12,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:12,331 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:12,331 INFO L186 Difference]: Start difference. First operand has 662 places, 2435 transitions, 51170 flow. Second operand 57 states and 3864 transitions. [2022-01-19 01:46:12,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3033 transitions, 70163 flow [2022-01-19 01:46:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 3033 transitions, 67424 flow, removed 1358 selfloop flow, removed 3 redundant places. [2022-01-19 01:46:21,194 INFO L242 Difference]: Finished difference. Result has 732 places, 2863 transitions, 64007 flow [2022-01-19 01:46:21,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49313, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=64007, PETRI_PLACES=732, PETRI_TRANSITIONS=2863} [2022-01-19 01:46:21,197 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 655 predicate places. [2022-01-19 01:46:21,197 INFO L470 AbstractCegarLoop]: Abstraction has has 732 places, 2863 transitions, 64007 flow [2022-01-19 01:46:21,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:21,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:21,197 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:21,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 01:46:21,411 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,SelfDestructingSolverStorable14 [2022-01-19 01:46:21,411 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1238803636, now seen corresponding path program 10 times [2022-01-19 01:46:21,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:21,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73710269] [2022-01-19 01:46:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:21,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:21,521 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 01:46:21,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73710269] [2022-01-19 01:46:21,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73710269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328553455] [2022-01-19 01:46:21,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:46:21,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:21,523 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 01:46:21,527 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 01:46:21,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:46:21,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:21,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:46:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:21,751 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 01:46:21,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:21,959 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 01:46:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328553455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:21,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:21,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:46:21,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268166851] [2022-01-19 01:46:21,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:21,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:46:21,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:46:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:46:21,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:46:21,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 2863 transitions, 64007 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:21,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:21,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:46:21,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:35,248 INFO L129 PetriNetUnfolder]: 4829/13945 cut-off events. [2022-01-19 01:46:35,248 INFO L130 PetriNetUnfolder]: For 411844/411880 co-relation queries the response was YES. [2022-01-19 01:46:35,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117434 conditions, 13945 events. 4829/13945 cut-off events. For 411844/411880 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 161731 event pairs, 433 based on Foata normal form. 43/13788 useless extension candidates. Maximal degree in co-relation 117243. Up to 1944 conditions per place. [2022-01-19 01:46:35,522 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 631 selfloop transitions, 2562 changer transitions 1/3248 dead transitions. [2022-01-19 01:46:35,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 3248 transitions, 78226 flow [2022-01-19 01:46:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-19 01:46:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-01-19 01:46:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8662 transitions. [2022-01-19 01:46:35,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658709106984969 [2022-01-19 01:46:35,530 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8662 transitions. [2022-01-19 01:46:35,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8662 transitions. [2022-01-19 01:46:35,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:35,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8662 transitions. [2022-01-19 01:46:35,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.63076923076923) internal successors, (8662), 130 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:35,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:35,554 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:35,555 INFO L186 Difference]: Start difference. First operand has 732 places, 2863 transitions, 64007 flow. Second operand 130 states and 8662 transitions. [2022-01-19 01:46:35,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 3248 transitions, 78226 flow [2022-01-19 01:46:42,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 3248 transitions, 77693 flow, removed 232 selfloop flow, removed 8 redundant places. [2022-01-19 01:46:42,562 INFO L242 Difference]: Finished difference. Result has 876 places, 3104 transitions, 76734 flow [2022-01-19 01:46:42,565 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=63474, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=76734, PETRI_PLACES=876, PETRI_TRANSITIONS=3104} [2022-01-19 01:46:42,565 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 799 predicate places. [2022-01-19 01:46:42,565 INFO L470 AbstractCegarLoop]: Abstraction has has 876 places, 3104 transitions, 76734 flow [2022-01-19 01:46:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:42,566 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:42,566 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:42,590 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 01:46:42,779 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,SelfDestructingSolverStorable15 [2022-01-19 01:46:42,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 262790282, now seen corresponding path program 11 times [2022-01-19 01:46:42,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:42,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076102465] [2022-01-19 01:46:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:42,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:42,887 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 01:46:42,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:42,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076102465] [2022-01-19 01:46:42,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076102465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:42,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931489634] [2022-01-19 01:46:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:46:42,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:42,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:42,889 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 01:46:42,891 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 01:46:42,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:46:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 01:46:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:43,181 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 01:46:43,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:43,446 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 01:46:43,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931489634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:43,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:43,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 01:46:43,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023999723] [2022-01-19 01:46:43,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:43,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 01:46:43,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 01:46:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-19 01:46:43,448 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:46:43,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 3104 transitions, 76734 flow. Second operand has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:43,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:43,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:46:43,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:02,623 INFO L129 PetriNetUnfolder]: 7737/22351 cut-off events. [2022-01-19 01:47:02,623 INFO L130 PetriNetUnfolder]: For 773389/773411 co-relation queries the response was YES. [2022-01-19 01:47:03,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197699 conditions, 22351 events. 7737/22351 cut-off events. For 773389/773411 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 278491 event pairs, 768 based on Foata normal form. 17/22033 useless extension candidates. Maximal degree in co-relation 197484. Up to 3287 conditions per place. [2022-01-19 01:47:03,190 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1809 selfloop transitions, 3057 changer transitions 22/4942 dead transitions. [2022-01-19 01:47:03,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 4942 transitions, 131960 flow [2022-01-19 01:47:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 01:47:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 01:47:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4702 transitions. [2022-01-19 01:47:03,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7720853858784893 [2022-01-19 01:47:03,196 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4702 transitions. [2022-01-19 01:47:03,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4702 transitions. [2022-01-19 01:47:03,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:03,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4702 transitions. [2022-01-19 01:47:03,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 67.17142857142858) internal successors, (4702), 70 states have internal predecessors, (4702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:03,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:03,208 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:03,208 INFO L186 Difference]: Start difference. First operand has 876 places, 3104 transitions, 76734 flow. Second operand 70 states and 4702 transitions. [2022-01-19 01:47:03,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 4942 transitions, 131960 flow [2022-01-19 01:47:17,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4942 transitions, 129507 flow, removed 285 selfloop flow, removed 59 redundant places. [2022-01-19 01:47:17,340 INFO L242 Difference]: Finished difference. Result has 923 places, 4694 transitions, 128059 flow [2022-01-19 01:47:17,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=75105, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=128059, PETRI_PLACES=923, PETRI_TRANSITIONS=4694} [2022-01-19 01:47:17,344 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 846 predicate places. [2022-01-19 01:47:17,344 INFO L470 AbstractCegarLoop]: Abstraction has has 923 places, 4694 transitions, 128059 flow [2022-01-19 01:47:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:17,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:47:17,344 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:47:17,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-19 01:47:17,550 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,SelfDestructingSolverStorable16 [2022-01-19 01:47:17,550 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:47:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:47:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1258186080, now seen corresponding path program 12 times [2022-01-19 01:47:17,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:47:17,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408293230] [2022-01-19 01:47:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:47:17,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:47:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:47:17,666 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 01:47:17,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:47:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408293230] [2022-01-19 01:47:17,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408293230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:47:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045483631] [2022-01-19 01:47:17,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:47:17,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:17,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:47:17,672 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 01:47:17,673 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 01:47:17,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 01:47:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:47:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:47:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:47:17,948 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 01:47:17,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:47:18,123 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 01:47:18,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045483631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:47:18,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:47:18,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:47:18,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412885184] [2022-01-19 01:47:18,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:47:18,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:47:18,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:47:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:47:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:47:18,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:47:18,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 4694 transitions, 128059 flow. Second operand has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:18,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:47:18,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:47:18,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:46,192 INFO L129 PetriNetUnfolder]: 8050/23040 cut-off events. [2022-01-19 01:47:46,192 INFO L130 PetriNetUnfolder]: For 1049489/1049543 co-relation queries the response was YES. [2022-01-19 01:47:46,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224860 conditions, 23040 events. 8050/23040 cut-off events. For 1049489/1049543 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 287041 event pairs, 731 based on Foata normal form. 46/22716 useless extension candidates. Maximal degree in co-relation 224613. Up to 3302 conditions per place. [2022-01-19 01:47:46,774 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 995 selfloop transitions, 4020 changer transitions 5/5074 dead transitions. [2022-01-19 01:47:46,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 5074 transitions, 147461 flow [2022-01-19 01:47:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-19 01:47:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-01-19 01:47:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5583 transitions. [2022-01-19 01:47:46,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7731616119651018 [2022-01-19 01:47:46,779 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5583 transitions. [2022-01-19 01:47:46,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5583 transitions. [2022-01-19 01:47:46,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:46,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5583 transitions. [2022-01-19 01:47:46,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.26506024096386) internal successors, (5583), 83 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:46,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:46,792 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:46,792 INFO L186 Difference]: Start difference. First operand has 923 places, 4694 transitions, 128059 flow. Second operand 83 states and 5583 transitions. [2022-01-19 01:47:46,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 5074 transitions, 147461 flow [2022-01-19 01:48:07,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 982 places, 5074 transitions, 144531 flow, removed 428 selfloop flow, removed 13 redundant places. [2022-01-19 01:48:07,471 INFO L242 Difference]: Finished difference. Result has 1000 places, 4898 transitions, 144382 flow [2022-01-19 01:48:07,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=124810, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=144382, PETRI_PLACES=1000, PETRI_TRANSITIONS=4898} [2022-01-19 01:48:07,475 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 923 predicate places. [2022-01-19 01:48:07,475 INFO L470 AbstractCegarLoop]: Abstraction has has 1000 places, 4898 transitions, 144382 flow [2022-01-19 01:48:07,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:07,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:48:07,475 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:48:07,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 01:48:07,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:07,676 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:48:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:48:07,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1842044668, now seen corresponding path program 13 times [2022-01-19 01:48:07,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:48:07,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731496196] [2022-01-19 01:48:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:48:07,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:48:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:07,775 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 01:48:07,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:48:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731496196] [2022-01-19 01:48:07,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731496196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:48:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712220107] [2022-01-19 01:48:07,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:48:07,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:48:07,777 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 01:48:07,778 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 01:48:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:48:07,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:48:07,994 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 01:48:07,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:48:08,202 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 01:48:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712220107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:48:08,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:48:08,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 01:48:08,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752154322] [2022-01-19 01:48:08,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:48:08,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 01:48:08,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:48:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 01:48:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-19 01:48:08,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:48:08,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:08,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:48:08,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:48:08,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:48:45,686 INFO L129 PetriNetUnfolder]: 9677/27387 cut-off events. [2022-01-19 01:48:45,687 INFO L130 PetriNetUnfolder]: For 1464590/1464707 co-relation queries the response was YES. [2022-01-19 01:48:46,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289404 conditions, 27387 events. 9677/27387 cut-off events. For 1464590/1464707 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 348540 event pairs, 826 based on Foata normal form. 76/27016 useless extension candidates. Maximal degree in co-relation 289142. Up to 3970 conditions per place. [2022-01-19 01:48:46,646 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1046 selfloop transitions, 5220 changer transitions 3/6323 dead transitions. [2022-01-19 01:48:46,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 6323 transitions, 197765 flow [2022-01-19 01:48:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 01:48:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 01:48:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5028 transitions. [2022-01-19 01:48:46,650 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7705747126436782 [2022-01-19 01:48:46,650 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5028 transitions. [2022-01-19 01:48:46,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5028 transitions. [2022-01-19 01:48:46,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:48:46,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5028 transitions. [2022-01-19 01:48:46,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.04) internal successors, (5028), 75 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:46,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:46,661 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:46,662 INFO L186 Difference]: Start difference. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand 75 states and 5028 transitions. [2022-01-19 01:48:46,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 6323 transitions, 197765 flow [2022-01-19 01:49:19,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 6323 transitions, 196178 flow, removed 349 selfloop flow, removed 42 redundant places. [2022-01-19 01:49:19,250 INFO L242 Difference]: Finished difference. Result has 1061 places, 6201 transitions, 199570 flow [2022-01-19 01:49:19,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=142927, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=199570, PETRI_PLACES=1061, PETRI_TRANSITIONS=6201} [2022-01-19 01:49:19,254 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 984 predicate places. [2022-01-19 01:49:19,254 INFO L470 AbstractCegarLoop]: Abstraction has has 1061 places, 6201 transitions, 199570 flow [2022-01-19 01:49:19,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:19,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:49:19,255 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:49:19,270 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 01:49:19,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:19,455 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:49:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:49:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1245142102, now seen corresponding path program 14 times [2022-01-19 01:49:19,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:49:19,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16956566] [2022-01-19 01:49:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:49:19,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:49:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:49:19,557 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 01:49:19,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:49:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16956566] [2022-01-19 01:49:19,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16956566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:49:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343206250] [2022-01-19 01:49:19,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:49:19,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:19,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:49:19,558 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 01:49:19,560 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 01:49:19,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:49:19,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:49:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:49:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:49:19,752 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 01:49:19,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:49:19,916 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 01:49:19,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343206250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:49:19,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:49:19,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:49:19,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672723850] [2022-01-19 01:49:19,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:49:19,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:49:19,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:49:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:49:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:49:19,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:49:19,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:19,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:49:19,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:49:19,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:50:17,328 INFO L129 PetriNetUnfolder]: 11284/31567 cut-off events. [2022-01-19 01:50:17,329 INFO L130 PetriNetUnfolder]: For 1918870/1919002 co-relation queries the response was YES. [2022-01-19 01:50:18,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 358158 conditions, 31567 events. 11284/31567 cut-off events. For 1918870/1919002 co-relation queries the response was YES. Maximal size of possible extension queue 2363. Compared 407731 event pairs, 544 based on Foata normal form. 62/31473 useless extension candidates. Maximal degree in co-relation 357871. Up to 4617 conditions per place. [2022-01-19 01:50:18,694 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1195 selfloop transitions, 6481 changer transitions 17/7747 dead transitions. [2022-01-19 01:50:18,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1193 places, 7747 transitions, 264029 flow [2022-01-19 01:50:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-19 01:50:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-01-19 01:50:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 8829 transitions. [2022-01-19 01:50:18,707 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7630282603059373 [2022-01-19 01:50:18,708 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 8829 transitions. [2022-01-19 01:50:18,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 8829 transitions. [2022-01-19 01:50:18,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:50:18,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 8829 transitions. [2022-01-19 01:50:18,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 66.38345864661655) internal successors, (8829), 133 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:18,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:18,730 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:18,730 INFO L186 Difference]: Start difference. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand 133 states and 8829 transitions. [2022-01-19 01:50:18,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1193 places, 7747 transitions, 264029 flow [2022-01-19 01:51:04,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1186 places, 7747 transitions, 262866 flow, removed 507 selfloop flow, removed 7 redundant places. [2022-01-19 01:51:05,102 INFO L242 Difference]: Finished difference. Result has 1234 places, 7553 transitions, 267750 flow [2022-01-19 01:51:05,105 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=198740, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=267750, PETRI_PLACES=1234, PETRI_TRANSITIONS=7553} [2022-01-19 01:51:05,106 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1157 predicate places. [2022-01-19 01:51:05,106 INFO L470 AbstractCegarLoop]: Abstraction has has 1234 places, 7553 transitions, 267750 flow [2022-01-19 01:51:05,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:05,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:51:05,106 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:51:05,125 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 01:51:05,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:51:05,312 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:51:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:51:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1234851806, now seen corresponding path program 15 times [2022-01-19 01:51:05,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:51:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135334242] [2022-01-19 01:51:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:51:05,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:51:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:51:05,416 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 01:51:05,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:51:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135334242] [2022-01-19 01:51:05,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135334242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:51:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400961034] [2022-01-19 01:51:05,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:51:05,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:51:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:51:05,420 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 01:51:05,424 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 01:51:05,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 01:51:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:51:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:51:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:51:05,648 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 01:51:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:51:05,824 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 01:51:05,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400961034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:51:05,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:51:05,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 01:51:05,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016888442] [2022-01-19 01:51:05,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:51:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 01:51:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:51:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 01:51:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-19 01:51:05,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:51:05,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:05,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:51:05,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:51:05,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:52:24,049 INFO L129 PetriNetUnfolder]: 12045/33597 cut-off events. [2022-01-19 01:52:24,050 INFO L130 PetriNetUnfolder]: For 2364947/2365051 co-relation queries the response was YES. [2022-01-19 01:52:25,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411839 conditions, 33597 events. 12045/33597 cut-off events. For 2364947/2365051 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 437048 event pairs, 1157 based on Foata normal form. 80/33163 useless extension candidates. Maximal degree in co-relation 411504. Up to 7782 conditions per place. [2022-01-19 01:52:25,922 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 1659 selfloop transitions, 6612 changer transitions 3/8328 dead transitions. [2022-01-19 01:52:25,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1319 places, 8328 transitions, 308389 flow [2022-01-19 01:52:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-19 01:52:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-01-19 01:52:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5713 transitions. [2022-01-19 01:52:25,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635658914728682 [2022-01-19 01:52:25,927 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5713 transitions. [2022-01-19 01:52:25,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5713 transitions. [2022-01-19 01:52:25,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:52:25,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5713 transitions. [2022-01-19 01:52:25,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 66.43023255813954) internal successors, (5713), 86 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:25,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:25,938 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:25,938 INFO L186 Difference]: Start difference. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand 86 states and 5713 transitions. [2022-01-19 01:52:25,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1319 places, 8328 transitions, 308389 flow [2022-01-19 01:53:33,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 8328 transitions, 306882 flow, removed 512 selfloop flow, removed 38 redundant places. [2022-01-19 01:53:33,326 INFO L242 Difference]: Finished difference. Result has 1320 places, 8180 transitions, 313056 flow [2022-01-19 01:53:33,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=266127, PETRI_DIFFERENCE_MINUEND_PLACES=1196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=313056, PETRI_PLACES=1320, PETRI_TRANSITIONS=8180} [2022-01-19 01:53:33,333 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1243 predicate places. [2022-01-19 01:53:33,333 INFO L470 AbstractCegarLoop]: Abstraction has has 1320 places, 8180 transitions, 313056 flow [2022-01-19 01:53:33,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:33,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:53:33,334 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:53:33,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-19 01:53:33,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:53:33,555 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:53:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:53:33,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2011559796, now seen corresponding path program 16 times [2022-01-19 01:53:33,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:53:33,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021860400] [2022-01-19 01:53:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:53:33,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:53:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:53:33,656 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 01:53:33,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:53:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021860400] [2022-01-19 01:53:33,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021860400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:53:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985739198] [2022-01-19 01:53:33,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:53:33,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:53:33,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:53:33,657 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 01:53:33,659 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 01:53:33,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:53:33,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:53:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 01:53:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:53:33,889 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 01:53:33,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:53:34,063 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 01:53:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985739198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:53:34,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:53:34,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 01:53:34,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028048248] [2022-01-19 01:53:34,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:53:34,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 01:53:34,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:53:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 01:53:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-19 01:53:34,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:53:34,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:34,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:53:34,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:53:34,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:55:07,596 INFO L129 PetriNetUnfolder]: 12071/33384 cut-off events. [2022-01-19 01:55:07,596 INFO L130 PetriNetUnfolder]: For 2712518/2712631 co-relation queries the response was YES. [2022-01-19 01:55:09,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437774 conditions, 33384 events. 12071/33384 cut-off events. For 2712518/2712631 co-relation queries the response was YES. Maximal size of possible extension queue 2466. Compared 432206 event pairs, 1567 based on Foata normal form. 16/32699 useless extension candidates. Maximal degree in co-relation 437410. Up to 9770 conditions per place. [2022-01-19 01:55:10,157 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 4356 selfloop transitions, 3839 changer transitions 5/8254 dead transitions. [2022-01-19 01:55:10,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1352 places, 8254 transitions, 331718 flow [2022-01-19 01:55:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 01:55:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 01:55:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2230 transitions. [2022-01-19 01:55:10,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.776732845698363 [2022-01-19 01:55:10,160 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2230 transitions. [2022-01-19 01:55:10,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2230 transitions. [2022-01-19 01:55:10,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:55:10,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2230 transitions. [2022-01-19 01:55:10,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 67.57575757575758) internal successors, (2230), 33 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:10,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:10,164 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:55:10,164 INFO L186 Difference]: Start difference. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand 33 states and 2230 transitions. [2022-01-19 01:55:10,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1352 places, 8254 transitions, 331718 flow [2022-01-19 01:56:49,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1335 places, 8254 transitions, 330970 flow, removed 206 selfloop flow, removed 17 redundant places. [2022-01-19 01:56:49,922 INFO L242 Difference]: Finished difference. Result has 1338 places, 8202 transitions, 321096 flow [2022-01-19 01:56:49,928 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=312314, PETRI_DIFFERENCE_MINUEND_PLACES=1303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=321096, PETRI_PLACES=1338, PETRI_TRANSITIONS=8202} [2022-01-19 01:56:49,929 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1261 predicate places. [2022-01-19 01:56:49,929 INFO L470 AbstractCegarLoop]: Abstraction has has 1338 places, 8202 transitions, 321096 flow [2022-01-19 01:56:49,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:56:49,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:56:49,930 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, 1, 1, 1, 1, 1] [2022-01-19 01:56:49,953 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 01:56:50,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:56:50,150 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:56:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:56:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash -257090374, now seen corresponding path program 17 times [2022-01-19 01:56:50,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:56:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716064252] [2022-01-19 01:56:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:56:50,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:56:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:56:50,260 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 01:56:50,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:56:50,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716064252] [2022-01-19 01:56:50,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716064252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:56:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924131220] [2022-01-19 01:56:50,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:56:50,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:56:50,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:56:50,262 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 01:56:50,267 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 01:56:50,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 01:56:50,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:56:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 01:56:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:56:50,530 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 01:56:50,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:56:50,770 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 01:56:50,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924131220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:56:50,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:56:50,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 01:56:50,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575096161] [2022-01-19 01:56:50,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:56:50,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 01:56:50,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:56:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 01:56:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-19 01:56:50,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-01-19 01:56:50,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1338 places, 8202 transitions, 321096 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:56:50,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:56:50,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-01-19 01:56:50,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 01:58:38,432 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 01:58:38,433 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 01:58:39,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-19 01:58:39,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-19 01:58:40,877 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 01:58:40,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-19 01:58:40,878 WARN L594 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-01-19 01:58:40,879 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 01:58:40,879 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 01:58:40,882 INFO L732 BasicCegarLoop]: Path program histogram: [17, 4, 1, 1] [2022-01-19 01:58:40,883 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 01:58:40,883 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 01:58:40,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 01:58:40 BasicIcfg [2022-01-19 01:58:40,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 01:58:40,886 INFO L158 Benchmark]: Toolchain (without parser) took 794279.92ms. Allocated memory was 356.5MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 303.5MB in the beginning and 6.1GB in the end (delta: -5.8GB). Peak memory consumption was 5.0GB. Max. memory is 16.0GB. [2022-01-19 01:58:40,886 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory is still 320.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:58:40,886 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.62ms. Allocated memory is still 356.5MB. Free memory was 303.3MB in the beginning and 330.1MB in the end (delta: -26.8MB). Peak memory consumption was 15.7MB. Max. memory is 16.0GB. [2022-01-19 01:58:40,886 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.57ms. Allocated memory is still 356.5MB. Free memory was 330.1MB in the beginning and 328.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:58:40,886 INFO L158 Benchmark]: Boogie Preprocessor took 17.94ms. Allocated memory is still 356.5MB. Free memory was 328.5MB in the beginning and 327.6MB in the end (delta: 936.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 01:58:40,886 INFO L158 Benchmark]: RCFGBuilder took 320.99ms. Allocated memory is still 356.5MB. Free memory was 327.2MB in the beginning and 315.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 01:58:40,887 INFO L158 Benchmark]: TraceAbstraction took 793677.14ms. Allocated memory was 356.5MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 314.3MB in the beginning and 6.1GB in the end (delta: -5.8GB). Peak memory consumption was 5.0GB. Max. memory is 16.0GB. [2022-01-19 01:58:40,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory is still 320.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 223.62ms. Allocated memory is still 356.5MB. Free memory was 303.3MB in the beginning and 330.1MB in the end (delta: -26.8MB). Peak memory consumption was 15.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.57ms. Allocated memory is still 356.5MB. Free memory was 330.1MB in the beginning and 328.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 17.94ms. Allocated memory is still 356.5MB. Free memory was 328.5MB in the beginning and 327.6MB in the end (delta: 936.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 320.99ms. Allocated memory is still 356.5MB. Free memory was 327.2MB in the beginning and 315.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 793677.14ms. Allocated memory was 356.5MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 314.3MB in the beginning and 6.1GB in the end (delta: -5.8GB). Peak memory consumption was 5.0GB. 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: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - 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 Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 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: 793.5s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 778.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4633 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4633 mSDsluCounter, 3309 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5142 mSDsCounter, 988 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12456 IncrementalHoareTripleChecker+Invalid, 13444 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 988 mSolverCounterUnsat, 537 mSDtfsCounter, 12456 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4041 GetRequests, 2652 SyntacticMatches, 28 SemanticMatches, 1361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44419 ImplicationChecksByTransitivity, 23.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321096occurred in iteration=22, InterpolantAutomatonStates: 1181, 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, 1.0s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 3050 NumberOfCodeBlocks, 2886 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 4389 ConstructedInterpolants, 0 QuantifiedInterpolants, 13805 SizeOfPredicates, 142 NumberOfNonLiveVariables, 2798 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 61 InterpolantComputations, 5 PerfectInterpolantSequences, 272/398 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