/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-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 01:42:30,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 01:42:30,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 01:42:30,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 01:42:30,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 01:42:30,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 01:42:30,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 01:42:30,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 01:42:30,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 01:42:30,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 01:42:30,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 01:42:30,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 01:42:30,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 01:42:30,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 01:42:30,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 01:42:30,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 01:42:30,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 01:42:30,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 01:42:30,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 01:42:30,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 01:42:30,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 01:42:30,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 01:42:30,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 01:42:30,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 01:42:30,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 01:42:30,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 01:42:30,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 01:42:30,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 01:42:30,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 01:42:30,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 01:42:30,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 01:42:30,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 01:42:30,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 01:42:30,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 01:42:30,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 01:42:30,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 01:42:30,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 01:42:30,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 01:42:30,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 01:42:30,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 01:42:30,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 01:42:30,744 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 01:42:30,767 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 01:42:30,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 01:42:30,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 01:42:30,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 01:42:30,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 01:42:30,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 01:42:30,770 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 01:42:30,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 01:42:30,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 01:42:30,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 01:42:30,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 01:42:30,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 01:42:30,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 01:42:30,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 01:42:30,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 01:42:30,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 01:42:30,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:42:30,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 01:42:30,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 01:42:30,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 01:42:30,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 01:42:30,773 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 01:42:30,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 01:42:30,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 01:42:30,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 01:42:30,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 01:42:30,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 01:42:30,942 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 01:42:30,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2022-01-19 01:42:30,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8333c296/8a65806aadd74470bb33b5bbe07b20bd/FLAGd56068fbc [2022-01-19 01:42:31,311 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 01:42:31,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2022-01-19 01:42:31,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8333c296/8a65806aadd74470bb33b5bbe07b20bd/FLAGd56068fbc [2022-01-19 01:42:31,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8333c296/8a65806aadd74470bb33b5bbe07b20bd [2022-01-19 01:42:31,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 01:42:31,754 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 01:42:31,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 01:42:31,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 01:42:31,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 01:42:31,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff7689b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31, skipping insertion in model container [2022-01-19 01:42:31,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 01:42:31,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 01:42:31,902 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-counter-fun.wvr.c[2681,2694] [2022-01-19 01:42:31,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:42:31,917 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 01:42:31,930 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-counter-fun.wvr.c[2681,2694] [2022-01-19 01:42:31,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:42:31,940 INFO L208 MainTranslator]: Completed translation [2022-01-19 01:42:31,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31 WrapperNode [2022-01-19 01:42:31,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 01:42:31,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 01:42:31,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 01:42:31,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 01:42:31,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,965 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-01-19 01:42:31,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 01:42:31,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 01:42:31,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 01:42:31,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 01:42:31,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 01:42:31,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 01:42:31,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 01:42:31,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 01:42:31,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (1/1) ... [2022-01-19 01:42:31,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:42:32,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:32,009 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 01:42:32,013 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 01:42:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 01:42:32,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 01:42:32,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 01:42:32,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 01:42:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 01:42:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 01:42:32,035 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 01:42:32,111 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 01:42:32,112 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 01:42:32,327 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 01:42:32,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 01:42:32,395 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-19 01:42:32,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:42:32 BoogieIcfgContainer [2022-01-19 01:42:32,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 01:42:32,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 01:42:32,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 01:42:32,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 01:42:32,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:42:31" (1/3) ... [2022-01-19 01:42:32,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345b97fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:42:32, skipping insertion in model container [2022-01-19 01:42:32,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:42:31" (2/3) ... [2022-01-19 01:42:32,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345b97fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:42:32, skipping insertion in model container [2022-01-19 01:42:32,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:42:32" (3/3) ... [2022-01-19 01:42:32,401 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-01-19 01:42:32,404 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 01:42:32,404 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 01:42:32,404 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 01:42:32,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,444 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,444 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,447 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,447 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,447 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,447 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,448 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,450 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,450 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:42:32,451 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 01:42:32,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 01:42:32,508 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 01:42:32,509 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 01:42:32,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2022-01-19 01:42:32,575 INFO L129 PetriNetUnfolder]: 13/163 cut-off events. [2022-01-19 01:42:32,576 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:42:32,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-01-19 01:42:32,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2022-01-19 01:42:32,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2022-01-19 01:42:32,616 INFO L129 PetriNetUnfolder]: 13/153 cut-off events. [2022-01-19 01:42:32,616 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:42:32,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:32,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:32,617 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -971864850, now seen corresponding path program 1 times [2022-01-19 01:42:32,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:32,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339988177] [2022-01-19 01:42:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:32,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:33,026 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 01:42:33,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:33,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339988177] [2022-01-19 01:42:33,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339988177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:33,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:33,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:42:33,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773814925] [2022-01-19 01:42:33,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:33,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:42:33,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:42:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:42:33,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2022-01-19 01:42:33,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:33,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:33,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2022-01-19 01:42:33,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:33,190 INFO L129 PetriNetUnfolder]: 14/195 cut-off events. [2022-01-19 01:42:33,190 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-01-19 01:42:33,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 195 events. 14/195 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 150. Up to 23 conditions per place. [2022-01-19 01:42:33,193 INFO L132 encePairwiseOnDemand]: 145/165 looper letters, 28 selfloop transitions, 3 changer transitions 10/154 dead transitions. [2022-01-19 01:42:33,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 411 flow [2022-01-19 01:42:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 01:42:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 01:42:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 915 transitions. [2022-01-19 01:42:33,210 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-01-19 01:42:33,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 915 transitions. [2022-01-19 01:42:33,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 915 transitions. [2022-01-19 01:42:33,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:33,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 915 transitions. [2022-01-19 01:42:33,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:33,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:33,228 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:33,229 INFO L186 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 7 states and 915 transitions. [2022-01-19 01:42:33,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 411 flow [2022-01-19 01:42:33,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 154 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 01:42:33,240 INFO L242 Difference]: Finished difference. Result has 153 places, 142 transitions, 307 flow [2022-01-19 01:42:33,241 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2022-01-19 01:42:33,244 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2022-01-19 01:42:33,244 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 307 flow [2022-01-19 01:42:33,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:33,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:33,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:33,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 01:42:33,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:33,246 INFO L85 PathProgramCache]: Analyzing trace with hash 202378132, now seen corresponding path program 1 times [2022-01-19 01:42:33,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:33,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248784536] [2022-01-19 01:42:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:33,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:33,378 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 01:42:33,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:33,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248784536] [2022-01-19 01:42:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248784536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:33,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875728172] [2022-01-19 01:42:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:33,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:33,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:33,385 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 01:42:33,431 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 01:42:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 01:42:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:33,954 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 01:42:33,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 01:42:33,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875728172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:33,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 01:42:33,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-01-19 01:42:33,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322747905] [2022-01-19 01:42:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:33,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 01:42:33,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 01:42:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 01:42:33,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-01-19 01:42:33,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:33,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:33,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-01-19 01:42:33,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:34,071 INFO L129 PetriNetUnfolder]: 15/265 cut-off events. [2022-01-19 01:42:34,072 INFO L130 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2022-01-19 01:42:34,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 509 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-01-19 01:42:34,073 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2022-01-19 01:42:34,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 163 transitions, 467 flow [2022-01-19 01:42:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 01:42:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 01:42:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2022-01-19 01:42:34,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2022-01-19 01:42:34,076 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2022-01-19 01:42:34,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2022-01-19 01:42:34,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:34,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2022-01-19 01:42:34,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,082 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,082 INFO L186 Difference]: Start difference. First operand has 153 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2022-01-19 01:42:34,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 163 transitions, 467 flow [2022-01-19 01:42:34,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 01:42:34,085 INFO L242 Difference]: Finished difference. Result has 152 places, 143 transitions, 332 flow [2022-01-19 01:42:34,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2022-01-19 01:42:34,086 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2022-01-19 01:42:34,086 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 332 flow [2022-01-19 01:42:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:34,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:34,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 01:42:34,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:34,304 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1935558459, now seen corresponding path program 1 times [2022-01-19 01:42:34,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:34,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145547297] [2022-01-19 01:42:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:34,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:34,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:34,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145547297] [2022-01-19 01:42:34,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145547297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:34,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:34,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:42:34,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97538468] [2022-01-19 01:42:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:34,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:42:34,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:42:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:42:34,387 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:34,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:34,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:34,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:34,485 INFO L129 PetriNetUnfolder]: 118/434 cut-off events. [2022-01-19 01:42:34,485 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-01-19 01:42:34,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 434 events. 118/434 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1592 event pairs, 37 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 662. Up to 126 conditions per place. [2022-01-19 01:42:34,488 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 36 selfloop transitions, 5 changer transitions 4/168 dead transitions. [2022-01-19 01:42:34,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 168 transitions, 491 flow [2022-01-19 01:42:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:42:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:42:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 864 transitions. [2022-01-19 01:42:34,490 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8727272727272727 [2022-01-19 01:42:34,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 864 transitions. [2022-01-19 01:42:34,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 864 transitions. [2022-01-19 01:42:34,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:34,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 864 transitions. [2022-01-19 01:42:34,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,494 INFO L186 Difference]: Start difference. First operand has 152 places, 143 transitions, 332 flow. Second operand 6 states and 864 transitions. [2022-01-19 01:42:34,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 168 transitions, 491 flow [2022-01-19 01:42:34,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 168 transitions, 475 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 01:42:34,498 INFO L242 Difference]: Finished difference. Result has 152 places, 145 transitions, 342 flow [2022-01-19 01:42:34,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=152, PETRI_TRANSITIONS=145} [2022-01-19 01:42:34,500 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2022-01-19 01:42:34,500 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 145 transitions, 342 flow [2022-01-19 01:42:34,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:34,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:34,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 01:42:34,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash -774645913, now seen corresponding path program 2 times [2022-01-19 01:42:34,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:34,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902515781] [2022-01-19 01:42:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:34,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:34,548 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 01:42:34,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902515781] [2022-01-19 01:42:34,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902515781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083904448] [2022-01-19 01:42:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:42:34,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:34,549 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 01:42:34,588 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 01:42:34,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:42:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 01:42:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:34,790 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 01:42:34,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:34,906 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 01:42:34,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083904448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:34,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:34,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 01:42:34,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82228806] [2022-01-19 01:42:34,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:34,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 01:42:34,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:34,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 01:42:34,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-19 01:42:34,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:34,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 145 transitions, 342 flow. Second operand has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:34,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:34,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:34,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:35,080 INFO L129 PetriNetUnfolder]: 192/589 cut-off events. [2022-01-19 01:42:35,080 INFO L130 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-01-19 01:42:35,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 589 events. 192/589 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2561 event pairs, 7 based on Foata normal form. 9/593 useless extension candidates. Maximal degree in co-relation 1152. Up to 71 conditions per place. [2022-01-19 01:42:35,084 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 72 selfloop transitions, 31 changer transitions 1/227 dead transitions. [2022-01-19 01:42:35,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 227 transitions, 842 flow [2022-01-19 01:42:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-19 01:42:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-01-19 01:42:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2008 transitions. [2022-01-19 01:42:35,087 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8692640692640693 [2022-01-19 01:42:35,087 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2008 transitions. [2022-01-19 01:42:35,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2008 transitions. [2022-01-19 01:42:35,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:35,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2008 transitions. [2022-01-19 01:42:35,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.42857142857142) internal successors, (2008), 14 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,093 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,093 INFO L186 Difference]: Start difference. First operand has 152 places, 145 transitions, 342 flow. Second operand 14 states and 2008 transitions. [2022-01-19 01:42:35,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 227 transitions, 842 flow [2022-01-19 01:42:35,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 227 transitions, 815 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-01-19 01:42:35,098 INFO L242 Difference]: Finished difference. Result has 168 places, 177 transitions, 554 flow [2022-01-19 01:42:35,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=554, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2022-01-19 01:42:35,098 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 20 predicate places. [2022-01-19 01:42:35,099 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 554 flow [2022-01-19 01:42:35,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:35,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:35,119 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 01:42:35,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-19 01:42:35,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1462097601, now seen corresponding path program 1 times [2022-01-19 01:42:35,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:35,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617124004] [2022-01-19 01:42:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:35,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:35,365 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 01:42:35,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:35,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617124004] [2022-01-19 01:42:35,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617124004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141743783] [2022-01-19 01:42:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:35,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:35,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:35,367 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 01:42:35,368 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 01:42:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 01:42:35,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:35,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 01:42:35,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141743783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:35,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 01:42:35,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-01-19 01:42:35,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177731275] [2022-01-19 01:42:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:35,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 01:42:35,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 01:42:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 01:42:35,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-01-19 01:42:35,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:35,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-01-19 01:42:35,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:35,810 INFO L129 PetriNetUnfolder]: 68/475 cut-off events. [2022-01-19 01:42:35,810 INFO L130 PetriNetUnfolder]: For 284/300 co-relation queries the response was YES. [2022-01-19 01:42:35,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 475 events. 68/475 cut-off events. For 284/300 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1986 event pairs, 14 based on Foata normal form. 12/475 useless extension candidates. Maximal degree in co-relation 817. Up to 76 conditions per place. [2022-01-19 01:42:35,813 INFO L132 encePairwiseOnDemand]: 155/165 looper letters, 34 selfloop transitions, 7 changer transitions 5/186 dead transitions. [2022-01-19 01:42:35,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 186 transitions, 668 flow [2022-01-19 01:42:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 01:42:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 01:42:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1013 transitions. [2022-01-19 01:42:35,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7674242424242425 [2022-01-19 01:42:35,815 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1013 transitions. [2022-01-19 01:42:35,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1013 transitions. [2022-01-19 01:42:35,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:35,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1013 transitions. [2022-01-19 01:42:35,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.625) internal successors, (1013), 8 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,819 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,819 INFO L186 Difference]: Start difference. First operand has 168 places, 177 transitions, 554 flow. Second operand 8 states and 1013 transitions. [2022-01-19 01:42:35,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 186 transitions, 668 flow [2022-01-19 01:42:35,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 186 transitions, 666 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 01:42:35,825 INFO L242 Difference]: Finished difference. Result has 177 places, 178 transitions, 578 flow [2022-01-19 01:42:35,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=177, PETRI_TRANSITIONS=178} [2022-01-19 01:42:35,827 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 29 predicate places. [2022-01-19 01:42:35,827 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 178 transitions, 578 flow [2022-01-19 01:42:35,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:35,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:35,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:35,844 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 01:42:36,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:36,044 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash -533874036, now seen corresponding path program 1 times [2022-01-19 01:42:36,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611027086] [2022-01-19 01:42:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:36,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:36,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:36,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611027086] [2022-01-19 01:42:36,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611027086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:36,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:36,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:42:36,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376381391] [2022-01-19 01:42:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:36,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:42:36,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:42:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:42:36,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:36,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 178 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:36,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:36,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:36,208 INFO L129 PetriNetUnfolder]: 216/682 cut-off events. [2022-01-19 01:42:36,208 INFO L130 PetriNetUnfolder]: For 818/833 co-relation queries the response was YES. [2022-01-19 01:42:36,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 682 events. 216/682 cut-off events. For 818/833 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3308 event pairs, 80 based on Foata normal form. 8/678 useless extension candidates. Maximal degree in co-relation 1693. Up to 229 conditions per place. [2022-01-19 01:42:36,212 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 69 selfloop transitions, 16 changer transitions 1/210 dead transitions. [2022-01-19 01:42:36,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 914 flow [2022-01-19 01:42:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 01:42:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 01:42:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2022-01-19 01:42:36,214 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2022-01-19 01:42:36,214 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2022-01-19 01:42:36,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2022-01-19 01:42:36,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:36,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2022-01-19 01:42:36,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,217 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,217 INFO L186 Difference]: Start difference. First operand has 177 places, 178 transitions, 578 flow. Second operand 5 states and 737 transitions. [2022-01-19 01:42:36,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 914 flow [2022-01-19 01:42:36,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 210 transitions, 890 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-01-19 01:42:36,222 INFO L242 Difference]: Finished difference. Result has 176 places, 185 transitions, 665 flow [2022-01-19 01:42:36,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=665, PETRI_PLACES=176, PETRI_TRANSITIONS=185} [2022-01-19 01:42:36,223 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 28 predicate places. [2022-01-19 01:42:36,223 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 185 transitions, 665 flow [2022-01-19 01:42:36,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:36,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:36,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 01:42:36,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1873111084, now seen corresponding path program 2 times [2022-01-19 01:42:36,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:36,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491589095] [2022-01-19 01:42:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:36,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:36,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:36,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491589095] [2022-01-19 01:42:36,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491589095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:36,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874486244] [2022-01-19 01:42:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:42:36,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:36,275 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 01:42:36,276 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 01:42:36,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:42:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:36,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 01:42:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:36,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:36,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874486244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:36,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:36,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 01:42:36,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241455997] [2022-01-19 01:42:36,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:36,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 01:42:36,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 01:42:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-19 01:42:36,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:36,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 185 transitions, 665 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:36,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:36,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:36,864 INFO L129 PetriNetUnfolder]: 228/776 cut-off events. [2022-01-19 01:42:36,865 INFO L130 PetriNetUnfolder]: For 1144/1148 co-relation queries the response was YES. [2022-01-19 01:42:36,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 776 events. 228/776 cut-off events. For 1144/1148 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4130 event pairs, 38 based on Foata normal form. 12/781 useless extension candidates. Maximal degree in co-relation 1959. Up to 137 conditions per place. [2022-01-19 01:42:36,869 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 74 selfloop transitions, 48 changer transitions 1/247 dead transitions. [2022-01-19 01:42:36,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 247 transitions, 1212 flow [2022-01-19 01:42:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 01:42:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 01:42:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1308 transitions. [2022-01-19 01:42:36,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8808080808080808 [2022-01-19 01:42:36,871 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1308 transitions. [2022-01-19 01:42:36,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1308 transitions. [2022-01-19 01:42:36,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:36,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1308 transitions. [2022-01-19 01:42:36,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.33333333333334) internal successors, (1308), 9 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,875 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,875 INFO L186 Difference]: Start difference. First operand has 176 places, 185 transitions, 665 flow. Second operand 9 states and 1308 transitions. [2022-01-19 01:42:36,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 247 transitions, 1212 flow [2022-01-19 01:42:36,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 1200 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 01:42:36,881 INFO L242 Difference]: Finished difference. Result has 188 places, 205 transitions, 945 flow [2022-01-19 01:42:36,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=188, PETRI_TRANSITIONS=205} [2022-01-19 01:42:36,882 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 40 predicate places. [2022-01-19 01:42:36,882 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 205 transitions, 945 flow [2022-01-19 01:42:36,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:36,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:36,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:36,902 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 01:42:37,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:37,100 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1869100938, now seen corresponding path program 1 times [2022-01-19 01:42:37,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:37,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120835521] [2022-01-19 01:42:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:37,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:37,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120835521] [2022-01-19 01:42:37,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120835521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:37,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274625159] [2022-01-19 01:42:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:37,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:37,150 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 01:42:37,175 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 01:42:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:37,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 01:42:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:37,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:37,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274625159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:37,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:37,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 01:42:37,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846293538] [2022-01-19 01:42:37,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:37,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 01:42:37,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 01:42:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-19 01:42:37,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:37,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 205 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:37,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:37,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:37,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:37,690 INFO L129 PetriNetUnfolder]: 260/848 cut-off events. [2022-01-19 01:42:37,690 INFO L130 PetriNetUnfolder]: For 1943/1943 co-relation queries the response was YES. [2022-01-19 01:42:37,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 848 events. 260/848 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4670 event pairs, 27 based on Foata normal form. 5/846 useless extension candidates. Maximal degree in co-relation 2471. Up to 109 conditions per place. [2022-01-19 01:42:37,695 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 87 selfloop transitions, 75 changer transitions 0/286 dead transitions. [2022-01-19 01:42:37,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 286 transitions, 1760 flow [2022-01-19 01:42:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-19 01:42:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-01-19 01:42:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2004 transitions. [2022-01-19 01:42:37,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8675324675324675 [2022-01-19 01:42:37,699 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2004 transitions. [2022-01-19 01:42:37,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2004 transitions. [2022-01-19 01:42:37,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:37,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2004 transitions. [2022-01-19 01:42:37,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:37,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:37,705 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:37,705 INFO L186 Difference]: Start difference. First operand has 188 places, 205 transitions, 945 flow. Second operand 14 states and 2004 transitions. [2022-01-19 01:42:37,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 286 transitions, 1760 flow [2022-01-19 01:42:37,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 286 transitions, 1726 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-01-19 01:42:37,716 INFO L242 Difference]: Finished difference. Result has 205 places, 237 transitions, 1402 flow [2022-01-19 01:42:37,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1402, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2022-01-19 01:42:37,717 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 57 predicate places. [2022-01-19 01:42:37,717 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 1402 flow [2022-01-19 01:42:37,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:37,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:37,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:37,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 01:42:37,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:37,935 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash -89082242, now seen corresponding path program 2 times [2022-01-19 01:42:37,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:37,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749868494] [2022-01-19 01:42:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:37,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:37,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:37,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749868494] [2022-01-19 01:42:37,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749868494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:37,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:37,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:42:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007690615] [2022-01-19 01:42:37,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:37,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:42:37,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:42:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:42:37,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:37,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 1402 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:37,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:37,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:37,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:38,083 INFO L129 PetriNetUnfolder]: 260/873 cut-off events. [2022-01-19 01:42:38,083 INFO L130 PetriNetUnfolder]: For 2861/2863 co-relation queries the response was YES. [2022-01-19 01:42:38,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 873 events. 260/873 cut-off events. For 2861/2863 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4959 event pairs, 91 based on Foata normal form. 2/865 useless extension candidates. Maximal degree in co-relation 2765. Up to 282 conditions per place. [2022-01-19 01:42:38,089 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 110 selfloop transitions, 24 changer transitions 6/264 dead transitions. [2022-01-19 01:42:38,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 264 transitions, 1905 flow [2022-01-19 01:42:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:42:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:42:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2022-01-19 01:42:38,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2022-01-19 01:42:38,090 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2022-01-19 01:42:38,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2022-01-19 01:42:38,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:38,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2022-01-19 01:42:38,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,093 INFO L186 Difference]: Start difference. First operand has 205 places, 237 transitions, 1402 flow. Second operand 6 states and 865 transitions. [2022-01-19 01:42:38,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 264 transitions, 1905 flow [2022-01-19 01:42:38,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 264 transitions, 1777 flow, removed 38 selfloop flow, removed 3 redundant places. [2022-01-19 01:42:38,106 INFO L242 Difference]: Finished difference. Result has 209 places, 237 transitions, 1343 flow [2022-01-19 01:42:38,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1343, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2022-01-19 01:42:38,107 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 61 predicate places. [2022-01-19 01:42:38,107 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 1343 flow [2022-01-19 01:42:38,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:38,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:38,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 01:42:38,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:38,108 INFO L85 PathProgramCache]: Analyzing trace with hash -552919854, now seen corresponding path program 3 times [2022-01-19 01:42:38,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:38,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902636263] [2022-01-19 01:42:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:38,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:38,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902636263] [2022-01-19 01:42:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902636263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348711324] [2022-01-19 01:42:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:42:38,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:38,148 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 01:42:38,174 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 01:42:38,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:42:38,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 01:42:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:38,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:38,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348711324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:38,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:38,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 01:42:38,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434745578] [2022-01-19 01:42:38,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:38,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 01:42:38,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 01:42:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-19 01:42:38,486 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:38,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:38,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:38,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:38,681 INFO L129 PetriNetUnfolder]: 268/907 cut-off events. [2022-01-19 01:42:38,681 INFO L130 PetriNetUnfolder]: For 2753/2753 co-relation queries the response was YES. [2022-01-19 01:42:38,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 907 events. 268/907 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5293 event pairs, 78 based on Foata normal form. 5/901 useless extension candidates. Maximal degree in co-relation 2767. Up to 182 conditions per place. [2022-01-19 01:42:38,686 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 108 selfloop transitions, 55 changer transitions 1/288 dead transitions. [2022-01-19 01:42:38,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 288 transitions, 1966 flow [2022-01-19 01:42:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 01:42:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 01:42:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1307 transitions. [2022-01-19 01:42:38,688 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8801346801346801 [2022-01-19 01:42:38,688 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1307 transitions. [2022-01-19 01:42:38,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1307 transitions. [2022-01-19 01:42:38,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:38,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1307 transitions. [2022-01-19 01:42:38,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.22222222222223) internal successors, (1307), 9 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,692 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,692 INFO L186 Difference]: Start difference. First operand has 209 places, 237 transitions, 1343 flow. Second operand 9 states and 1307 transitions. [2022-01-19 01:42:38,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 288 transitions, 1966 flow [2022-01-19 01:42:38,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 288 transitions, 1938 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-01-19 01:42:38,705 INFO L242 Difference]: Finished difference. Result has 217 places, 249 transitions, 1610 flow [2022-01-19 01:42:38,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=217, PETRI_TRANSITIONS=249} [2022-01-19 01:42:38,706 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 69 predicate places. [2022-01-19 01:42:38,706 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 249 transitions, 1610 flow [2022-01-19 01:42:38,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:38,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:38,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:38,735 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 01:42:38,930 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 01:42:38,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1815906442, now seen corresponding path program 3 times [2022-01-19 01:42:38,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:38,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610347570] [2022-01-19 01:42:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:38,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:38,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610347570] [2022-01-19 01:42:38,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610347570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883580132] [2022-01-19 01:42:38,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:42:38,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:38,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:38,988 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 01:42:38,989 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 01:42:39,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:42:39,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 01:42:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:39,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:39,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883580132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:39,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:39,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 01:42:39,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511615573] [2022-01-19 01:42:39,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:39,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 01:42:39,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:39,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 01:42:39,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-19 01:42:39,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:39,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 249 transitions, 1610 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:39,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:39,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:39,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:39,582 INFO L129 PetriNetUnfolder]: 306/1052 cut-off events. [2022-01-19 01:42:39,582 INFO L130 PetriNetUnfolder]: For 4008/4008 co-relation queries the response was YES. [2022-01-19 01:42:39,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 1052 events. 306/1052 cut-off events. For 4008/4008 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6595 event pairs, 40 based on Foata normal form. 6/1048 useless extension candidates. Maximal degree in co-relation 3343. Up to 139 conditions per place. [2022-01-19 01:42:39,590 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 109 selfloop transitions, 80 changer transitions 2/315 dead transitions. [2022-01-19 01:42:39,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 2365 flow [2022-01-19 01:42:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 01:42:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 01:42:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1877 transitions. [2022-01-19 01:42:39,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875058275058275 [2022-01-19 01:42:39,593 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1877 transitions. [2022-01-19 01:42:39,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1877 transitions. [2022-01-19 01:42:39,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:39,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1877 transitions. [2022-01-19 01:42:39,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.3846153846154) internal successors, (1877), 13 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:39,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:39,598 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:39,598 INFO L186 Difference]: Start difference. First operand has 217 places, 249 transitions, 1610 flow. Second operand 13 states and 1877 transitions. [2022-01-19 01:42:39,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 2365 flow [2022-01-19 01:42:39,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 315 transitions, 2202 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-01-19 01:42:39,613 INFO L242 Difference]: Finished difference. Result has 225 places, 259 transitions, 1736 flow [2022-01-19 01:42:39,614 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1736, PETRI_PLACES=225, PETRI_TRANSITIONS=259} [2022-01-19 01:42:39,614 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 77 predicate places. [2022-01-19 01:42:39,614 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 259 transitions, 1736 flow [2022-01-19 01:42:39,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:39,615 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:39,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:39,633 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 01:42:39,831 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 01:42:39,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1175586544, now seen corresponding path program 4 times [2022-01-19 01:42:39,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:39,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669157540] [2022-01-19 01:42:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:39,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:39,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:39,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669157540] [2022-01-19 01:42:39,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669157540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:39,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:39,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:42:39,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313695543] [2022-01-19 01:42:39,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:39,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:42:39,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:39,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:42:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:42:39,871 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:39,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 259 transitions, 1736 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:39,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:39,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:39,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:40,036 INFO L129 PetriNetUnfolder]: 295/971 cut-off events. [2022-01-19 01:42:40,036 INFO L130 PetriNetUnfolder]: For 3657/3661 co-relation queries the response was YES. [2022-01-19 01:42:40,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 971 events. 295/971 cut-off events. For 3657/3661 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5764 event pairs, 94 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 3157. Up to 371 conditions per place. [2022-01-19 01:42:40,042 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 129 selfloop transitions, 29 changer transitions 9/291 dead transitions. [2022-01-19 01:42:40,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 291 transitions, 2330 flow [2022-01-19 01:42:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:42:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:42:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-01-19 01:42:40,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2022-01-19 01:42:40,044 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-01-19 01:42:40,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-01-19 01:42:40,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:40,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-01-19 01:42:40,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,048 INFO L186 Difference]: Start difference. First operand has 225 places, 259 transitions, 1736 flow. Second operand 6 states and 876 transitions. [2022-01-19 01:42:40,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 291 transitions, 2330 flow [2022-01-19 01:42:40,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 291 transitions, 2315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 01:42:40,063 INFO L242 Difference]: Finished difference. Result has 230 places, 259 transitions, 1794 flow [2022-01-19 01:42:40,064 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1794, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2022-01-19 01:42:40,064 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 82 predicate places. [2022-01-19 01:42:40,064 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 1794 flow [2022-01-19 01:42:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:40,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:40,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 01:42:40,065 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:40,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1649527968, now seen corresponding path program 4 times [2022-01-19 01:42:40,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:40,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835487714] [2022-01-19 01:42:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:40,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:40,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835487714] [2022-01-19 01:42:40,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835487714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:40,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:40,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 01:42:40,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809200304] [2022-01-19 01:42:40,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:40,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 01:42:40,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 01:42:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-19 01:42:40,108 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:40,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 1794 flow. Second operand has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:40,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:40,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:40,253 INFO L129 PetriNetUnfolder]: 315/1013 cut-off events. [2022-01-19 01:42:40,254 INFO L130 PetriNetUnfolder]: For 3875/3875 co-relation queries the response was YES. [2022-01-19 01:42:40,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1013 events. 315/1013 cut-off events. For 3875/3875 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6061 event pairs, 89 based on Foata normal form. 5/1009 useless extension candidates. Maximal degree in co-relation 3360. Up to 271 conditions per place. [2022-01-19 01:42:40,261 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 126 selfloop transitions, 44 changer transitions 3/297 dead transitions. [2022-01-19 01:42:40,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 297 transitions, 2404 flow [2022-01-19 01:42:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:42:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:42:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 883 transitions. [2022-01-19 01:42:40,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919191919191919 [2022-01-19 01:42:40,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 883 transitions. [2022-01-19 01:42:40,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 883 transitions. [2022-01-19 01:42:40,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:40,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 883 transitions. [2022-01-19 01:42:40,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,264 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,264 INFO L186 Difference]: Start difference. First operand has 230 places, 259 transitions, 1794 flow. Second operand 6 states and 883 transitions. [2022-01-19 01:42:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 297 transitions, 2404 flow [2022-01-19 01:42:40,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 297 transitions, 2308 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-01-19 01:42:40,280 INFO L242 Difference]: Finished difference. Result has 228 places, 264 transitions, 1902 flow [2022-01-19 01:42:40,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1902, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2022-01-19 01:42:40,280 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 80 predicate places. [2022-01-19 01:42:40,280 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 1902 flow [2022-01-19 01:42:40,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,281 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:40,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:40,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 01:42:40,281 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1931931080, now seen corresponding path program 5 times [2022-01-19 01:42:40,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228028180] [2022-01-19 01:42:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:40,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 01:42:40,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228028180] [2022-01-19 01:42:40,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228028180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:42:40,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:42:40,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 01:42:40,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454904022] [2022-01-19 01:42:40,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:42:40,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 01:42:40,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 01:42:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 01:42:40,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 01:42:40,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 1902 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:40,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 01:42:40,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:40,446 INFO L129 PetriNetUnfolder]: 304/936 cut-off events. [2022-01-19 01:42:40,447 INFO L130 PetriNetUnfolder]: For 3754/3754 co-relation queries the response was YES. [2022-01-19 01:42:40,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 936 events. 304/936 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5261 event pairs, 105 based on Foata normal form. 3/926 useless extension candidates. Maximal degree in co-relation 3205. Up to 340 conditions per place. [2022-01-19 01:42:40,453 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 116 selfloop transitions, 34 changer transitions 8/282 dead transitions. [2022-01-19 01:42:40,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 282 transitions, 2349 flow [2022-01-19 01:42:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 01:42:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 01:42:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2022-01-19 01:42:40,456 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8860606060606061 [2022-01-19 01:42:40,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2022-01-19 01:42:40,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2022-01-19 01:42:40,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:40,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2022-01-19 01:42:40,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,460 INFO L186 Difference]: Start difference. First operand has 228 places, 264 transitions, 1902 flow. Second operand 5 states and 731 transitions. [2022-01-19 01:42:40,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 282 transitions, 2349 flow [2022-01-19 01:42:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 282 transitions, 2282 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 01:42:40,474 INFO L242 Difference]: Finished difference. Result has 231 places, 262 transitions, 1867 flow [2022-01-19 01:42:40,475 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1867, PETRI_PLACES=231, PETRI_TRANSITIONS=262} [2022-01-19 01:42:40,475 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 83 predicate places. [2022-01-19 01:42:40,476 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 262 transitions, 1867 flow [2022-01-19 01:42:40,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:40,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:40,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-19 01:42:40,476 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1878094116, now seen corresponding path program 1 times [2022-01-19 01:42:40,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:40,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635945077] [2022-01-19 01:42:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:40,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:40,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635945077] [2022-01-19 01:42:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635945077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003814150] [2022-01-19 01:42:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:40,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:40,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:40,606 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 01:42:40,607 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 01:42:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 01:42:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:40,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-19 01:42:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:41,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-01-19 01:42:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:41,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003814150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:41,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:41,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-01-19 01:42:41,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332021233] [2022-01-19 01:42:41,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:41,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 01:42:41,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 01:42:41,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-19 01:42:41,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-01-19 01:42:41,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 262 transitions, 1867 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:41,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:41,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-01-19 01:42:41,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:41,872 INFO L129 PetriNetUnfolder]: 779/2818 cut-off events. [2022-01-19 01:42:41,872 INFO L130 PetriNetUnfolder]: For 9441/9639 co-relation queries the response was YES. [2022-01-19 01:42:41,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2818 events. 779/2818 cut-off events. For 9441/9639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23922 event pairs, 94 based on Foata normal form. 46/2799 useless extension candidates. Maximal degree in co-relation 8693. Up to 474 conditions per place. [2022-01-19 01:42:41,896 INFO L132 encePairwiseOnDemand]: 144/165 looper letters, 100 selfloop transitions, 33 changer transitions 10/342 dead transitions. [2022-01-19 01:42:41,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 342 transitions, 2370 flow [2022-01-19 01:42:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 01:42:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 01:42:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2141 transitions. [2022-01-19 01:42:41,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5898071625344352 [2022-01-19 01:42:41,899 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2141 transitions. [2022-01-19 01:42:41,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2141 transitions. [2022-01-19 01:42:41,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:41,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2141 transitions. [2022-01-19 01:42:41,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.31818181818181) internal successors, (2141), 22 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:41,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:41,905 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:41,905 INFO L186 Difference]: Start difference. First operand has 231 places, 262 transitions, 1867 flow. Second operand 22 states and 2141 transitions. [2022-01-19 01:42:41,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 342 transitions, 2370 flow [2022-01-19 01:42:41,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 2141 flow, removed 8 selfloop flow, removed 17 redundant places. [2022-01-19 01:42:41,940 INFO L242 Difference]: Finished difference. Result has 242 places, 283 transitions, 1858 flow [2022-01-19 01:42:41,940 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1858, PETRI_PLACES=242, PETRI_TRANSITIONS=283} [2022-01-19 01:42:41,940 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 94 predicate places. [2022-01-19 01:42:41,940 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 283 transitions, 1858 flow [2022-01-19 01:42:41,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:41,941 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:41,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:41,959 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 01:42:42,155 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,SelfDestructingSolverStorable14 [2022-01-19 01:42:42,155 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1958640954, now seen corresponding path program 2 times [2022-01-19 01:42:42,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:42,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445858835] [2022-01-19 01:42:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:42,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:42,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445858835] [2022-01-19 01:42:42,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445858835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885251538] [2022-01-19 01:42:42,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:42:42,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:42,283 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 01:42:42,284 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 01:42:42,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:42:42,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:42,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 01:42:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:42,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-19 01:42:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:42,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:42,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-01-19 01:42:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:42:42,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885251538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:42,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:42,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-01-19 01:42:42,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015182024] [2022-01-19 01:42:42,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:42,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 01:42:42,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 01:42:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-19 01:42:42,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-01-19 01:42:42,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 283 transitions, 1858 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:42,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:42,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-01-19 01:42:42,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:43,937 INFO L129 PetriNetUnfolder]: 2049/7109 cut-off events. [2022-01-19 01:42:43,937 INFO L130 PetriNetUnfolder]: For 17713/18335 co-relation queries the response was YES. [2022-01-19 01:42:43,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23040 conditions, 7109 events. 2049/7109 cut-off events. For 17713/18335 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 73448 event pairs, 182 based on Foata normal form. 156/7144 useless extension candidates. Maximal degree in co-relation 22948. Up to 1105 conditions per place. [2022-01-19 01:42:43,986 INFO L132 encePairwiseOnDemand]: 147/165 looper letters, 103 selfloop transitions, 40 changer transitions 14/356 dead transitions. [2022-01-19 01:42:43,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 356 transitions, 2518 flow [2022-01-19 01:42:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 01:42:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 01:42:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1935 transitions. [2022-01-19 01:42:43,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2022-01-19 01:42:43,989 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1935 transitions. [2022-01-19 01:42:43,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1935 transitions. [2022-01-19 01:42:43,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:43,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1935 transitions. [2022-01-19 01:42:43,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.75) internal successors, (1935), 20 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:43,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:43,995 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:43,995 INFO L186 Difference]: Start difference. First operand has 242 places, 283 transitions, 1858 flow. Second operand 20 states and 1935 transitions. [2022-01-19 01:42:43,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 356 transitions, 2518 flow [2022-01-19 01:42:44,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 356 transitions, 2428 flow, removed 43 selfloop flow, removed 6 redundant places. [2022-01-19 01:42:44,183 INFO L242 Difference]: Finished difference. Result has 262 places, 306 transitions, 2113 flow [2022-01-19 01:42:44,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2113, PETRI_PLACES=262, PETRI_TRANSITIONS=306} [2022-01-19 01:42:44,183 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 114 predicate places. [2022-01-19 01:42:44,183 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 306 transitions, 2113 flow [2022-01-19 01:42:44,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:44,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:44,184 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:44,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 01:42:44,384 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,SelfDestructingSolverStorable15 [2022-01-19 01:42:44,385 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash 440836057, now seen corresponding path program 3 times [2022-01-19 01:42:44,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:44,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23830914] [2022-01-19 01:42:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:44,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 01:42:44,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23830914] [2022-01-19 01:42:44,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23830914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050637095] [2022-01-19 01:42:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:42:44,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:44,789 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 01:42:44,801 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 01:42:44,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:42:44,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:44,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 01:42:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:45,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 01:42:45,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 01:42:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 01:42:46,137 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-01-19 01:42:46,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 46 [2022-01-19 01:42:46,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-19 01:42:46,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 01:42:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 01:42:46,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:46,366 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_418) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2022-01-19 01:42:47,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 01:42:47,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 97 [2022-01-19 01:42:47,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 01:42:47,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 326 [2022-01-19 01:42:47,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 01:42:47,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 307 treesize of output 283 [2022-01-19 01:42:47,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 01:42:47,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 110 [2022-01-19 01:42:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 01:42:48,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050637095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:48,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:48,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-01-19 01:42:48,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534853809] [2022-01-19 01:42:48,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-19 01:42:48,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-19 01:42:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2266, Unknown=16, NotChecked=98, Total=2652 [2022-01-19 01:42:48,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2022-01-19 01:42:48,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 306 transitions, 2113 flow. Second operand has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:48,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:48,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2022-01-19 01:42:48,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:53,721 INFO L129 PetriNetUnfolder]: 2040/7243 cut-off events. [2022-01-19 01:42:53,721 INFO L130 PetriNetUnfolder]: For 19309/20143 co-relation queries the response was YES. [2022-01-19 01:42:53,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23796 conditions, 7243 events. 2040/7243 cut-off events. For 19309/20143 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 77345 event pairs, 230 based on Foata normal form. 211/7321 useless extension candidates. Maximal degree in co-relation 23672. Up to 1351 conditions per place. [2022-01-19 01:42:53,774 INFO L132 encePairwiseOnDemand]: 132/165 looper letters, 118 selfloop transitions, 69 changer transitions 4/373 dead transitions. [2022-01-19 01:42:53,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 373 transitions, 2829 flow [2022-01-19 01:42:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 01:42:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 01:42:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2584 transitions. [2022-01-19 01:42:53,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4474458874458874 [2022-01-19 01:42:53,778 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2584 transitions. [2022-01-19 01:42:53,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2584 transitions. [2022-01-19 01:42:53,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:53,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2584 transitions. [2022-01-19 01:42:53,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.82857142857142) internal successors, (2584), 35 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:53,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:53,786 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:53,786 INFO L186 Difference]: Start difference. First operand has 262 places, 306 transitions, 2113 flow. Second operand 35 states and 2584 transitions. [2022-01-19 01:42:53,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 373 transitions, 2829 flow [2022-01-19 01:42:53,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 373 transitions, 2759 flow, removed 22 selfloop flow, removed 11 redundant places. [2022-01-19 01:42:53,891 INFO L242 Difference]: Finished difference. Result has 289 places, 344 transitions, 2525 flow [2022-01-19 01:42:53,891 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2525, PETRI_PLACES=289, PETRI_TRANSITIONS=344} [2022-01-19 01:42:53,891 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 141 predicate places. [2022-01-19 01:42:53,891 INFO L470 AbstractCegarLoop]: Abstraction has has 289 places, 344 transitions, 2525 flow [2022-01-19 01:42:53,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:53,892 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:53,892 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:42:53,911 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 01:42:54,108 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,SelfDestructingSolverStorable16 [2022-01-19 01:42:54,109 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:54,109 INFO L85 PathProgramCache]: Analyzing trace with hash 488371445, now seen corresponding path program 4 times [2022-01-19 01:42:54,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:54,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759626240] [2022-01-19 01:42:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:54,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:42:54,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:54,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759626240] [2022-01-19 01:42:54,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759626240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:54,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113094503] [2022-01-19 01:42:54,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:42:54,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:54,192 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 01:42:54,193 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 01:42:54,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:42:54,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:42:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:42:54,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 01:42:54,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113094503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:54,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:54,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 01:42:54,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406854508] [2022-01-19 01:42:54,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:54,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:42:54,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:42:54,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:42:54,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:42:54,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 344 transitions, 2525 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:54,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:54,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:42:54,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:58,012 INFO L129 PetriNetUnfolder]: 6961/18071 cut-off events. [2022-01-19 01:42:58,012 INFO L130 PetriNetUnfolder]: For 56372/57186 co-relation queries the response was YES. [2022-01-19 01:42:58,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67113 conditions, 18071 events. 6961/18071 cut-off events. For 56372/57186 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 191900 event pairs, 1163 based on Foata normal form. 144/18072 useless extension candidates. Maximal degree in co-relation 66922. Up to 4138 conditions per place. [2022-01-19 01:42:58,210 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 686 selfloop transitions, 206 changer transitions 0/1043 dead transitions. [2022-01-19 01:42:58,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1043 transitions, 10355 flow [2022-01-19 01:42:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 01:42:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 01:42:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7023 transitions. [2022-01-19 01:42:58,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512727272727273 [2022-01-19 01:42:58,216 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7023 transitions. [2022-01-19 01:42:58,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7023 transitions. [2022-01-19 01:42:58,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:58,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7023 transitions. [2022-01-19 01:42:58,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.46) internal successors, (7023), 50 states have internal predecessors, (7023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:58,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:58,232 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:58,233 INFO L186 Difference]: Start difference. First operand has 289 places, 344 transitions, 2525 flow. Second operand 50 states and 7023 transitions. [2022-01-19 01:42:58,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1043 transitions, 10355 flow [2022-01-19 01:42:58,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1043 transitions, 10247 flow, removed 31 selfloop flow, removed 19 redundant places. [2022-01-19 01:42:58,576 INFO L242 Difference]: Finished difference. Result has 334 places, 521 transitions, 4288 flow [2022-01-19 01:42:58,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4288, PETRI_PLACES=334, PETRI_TRANSITIONS=521} [2022-01-19 01:42:58,576 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 186 predicate places. [2022-01-19 01:42:58,576 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 521 transitions, 4288 flow [2022-01-19 01:42:58,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:58,577 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:58,577 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:42:58,593 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 01:42:58,784 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,SelfDestructingSolverStorable17 [2022-01-19 01:42:58,785 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1652934215, now seen corresponding path program 5 times [2022-01-19 01:42:58,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:58,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474874501] [2022-01-19 01:42:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:58,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:42:58,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474874501] [2022-01-19 01:42:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474874501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761373365] [2022-01-19 01:42:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:42:58,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:58,877 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 01:42:58,878 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 01:42:58,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 01:42:58,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:42:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:42:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:42:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:42:59,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761373365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:59,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:59,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:42:59,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781761021] [2022-01-19 01:42:59,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:59,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:42:59,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:42:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:42:59,384 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:42:59,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 521 transitions, 4288 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:59,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:59,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:42:59,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:43:04,389 INFO L129 PetriNetUnfolder]: 9379/24427 cut-off events. [2022-01-19 01:43:04,390 INFO L130 PetriNetUnfolder]: For 118641/119688 co-relation queries the response was YES. [2022-01-19 01:43:04,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110731 conditions, 24427 events. 9379/24427 cut-off events. For 118641/119688 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 273536 event pairs, 1010 based on Foata normal form. 114/24386 useless extension candidates. Maximal degree in co-relation 105186. Up to 4140 conditions per place. [2022-01-19 01:43:04,734 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 771 selfloop transitions, 330 changer transitions 0/1252 dead transitions. [2022-01-19 01:43:04,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1252 transitions, 13360 flow [2022-01-19 01:43:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-19 01:43:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-01-19 01:43:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7444 transitions. [2022-01-19 01:43:04,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512292738707833 [2022-01-19 01:43:04,739 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7444 transitions. [2022-01-19 01:43:04,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7444 transitions. [2022-01-19 01:43:04,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:43:04,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7444 transitions. [2022-01-19 01:43:04,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 140.45283018867926) internal successors, (7444), 53 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:04,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:04,759 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:04,759 INFO L186 Difference]: Start difference. First operand has 334 places, 521 transitions, 4288 flow. Second operand 53 states and 7444 transitions. [2022-01-19 01:43:04,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1252 transitions, 13360 flow [2022-01-19 01:43:06,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1252 transitions, 13316 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-01-19 01:43:06,179 INFO L242 Difference]: Finished difference. Result has 402 places, 667 transitions, 6484 flow [2022-01-19 01:43:06,180 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6484, PETRI_PLACES=402, PETRI_TRANSITIONS=667} [2022-01-19 01:43:06,180 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 254 predicate places. [2022-01-19 01:43:06,180 INFO L470 AbstractCegarLoop]: Abstraction has has 402 places, 667 transitions, 6484 flow [2022-01-19 01:43:06,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:06,181 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:43:06,181 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:43:06,199 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 01:43:06,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:06,395 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:43:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:43:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2059831979, now seen corresponding path program 6 times [2022-01-19 01:43:06,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:43:06,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124657703] [2022-01-19 01:43:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:43:06,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:43:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:43:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:43:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124657703] [2022-01-19 01:43:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124657703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:43:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155966863] [2022-01-19 01:43:06,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:43:06,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:43:06,484 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 01:43:06,485 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 01:43:06,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 01:43:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:43:06,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:43:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:43:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:06,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:43:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:07,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155966863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:43:07,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:43:07,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 01:43:07,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589012206] [2022-01-19 01:43:07,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:43:07,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 01:43:07,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:43:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 01:43:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-19 01:43:07,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:43:07,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 667 transitions, 6484 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:07,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:43:07,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:43:07,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:43:12,759 INFO L129 PetriNetUnfolder]: 9406/25693 cut-off events. [2022-01-19 01:43:12,759 INFO L130 PetriNetUnfolder]: For 202710/203851 co-relation queries the response was YES. [2022-01-19 01:43:12,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134689 conditions, 25693 events. 9406/25693 cut-off events. For 202710/203851 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 298880 event pairs, 2067 based on Foata normal form. 65/25508 useless extension candidates. Maximal degree in co-relation 128720. Up to 13999 conditions per place. [2022-01-19 01:43:13,067 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 574 selfloop transitions, 159 changer transitions 10/894 dead transitions. [2022-01-19 01:43:13,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 894 transitions, 10166 flow [2022-01-19 01:43:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-19 01:43:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-01-19 01:43:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2022-01-19 01:43:13,070 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441919191919192 [2022-01-19 01:43:13,070 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2022-01-19 01:43:13,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2022-01-19 01:43:13,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:43:13,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2022-01-19 01:43:13,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:13,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:13,077 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:13,077 INFO L186 Difference]: Start difference. First operand has 402 places, 667 transitions, 6484 flow. Second operand 24 states and 3343 transitions. [2022-01-19 01:43:13,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 894 transitions, 10166 flow [2022-01-19 01:43:15,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 894 transitions, 10024 flow, removed 47 selfloop flow, removed 5 redundant places. [2022-01-19 01:43:15,997 INFO L242 Difference]: Finished difference. Result has 430 places, 712 transitions, 7280 flow [2022-01-19 01:43:15,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7280, PETRI_PLACES=430, PETRI_TRANSITIONS=712} [2022-01-19 01:43:15,997 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 282 predicate places. [2022-01-19 01:43:15,997 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 712 transitions, 7280 flow [2022-01-19 01:43:15,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:15,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:43:15,998 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:43:16,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 01:43:16,206 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,SelfDestructingSolverStorable19 [2022-01-19 01:43:16,206 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:43:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:43:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1726535893, now seen corresponding path program 7 times [2022-01-19 01:43:16,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:43:16,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000758134] [2022-01-19 01:43:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:43:16,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:43:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:43:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:16,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:43:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000758134] [2022-01-19 01:43:16,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000758134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:43:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215973014] [2022-01-19 01:43:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:43:16,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:43:16,286 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 01:43:16,318 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 01:43:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:43:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:43:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:43:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:16,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:43:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215973014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:43:16,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:43:16,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 01:43:16,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133794936] [2022-01-19 01:43:16,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:43:16,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:43:16,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:43:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:43:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:43:16,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:43:16,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 712 transitions, 7280 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:16,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:43:16,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:43:16,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:43:23,192 INFO L129 PetriNetUnfolder]: 9419/26427 cut-off events. [2022-01-19 01:43:23,192 INFO L130 PetriNetUnfolder]: For 202604/203788 co-relation queries the response was YES. [2022-01-19 01:43:23,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139978 conditions, 26427 events. 9419/26427 cut-off events. For 202604/203788 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 312704 event pairs, 1570 based on Foata normal form. 83/26297 useless extension candidates. Maximal degree in co-relation 137879. Up to 9750 conditions per place. [2022-01-19 01:43:23,685 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 843 selfloop transitions, 257 changer transitions 3/1254 dead transitions. [2022-01-19 01:43:23,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1254 transitions, 14920 flow [2022-01-19 01:43:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 01:43:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 01:43:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6734 transitions. [2022-01-19 01:43:23,690 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8502525252525253 [2022-01-19 01:43:23,690 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6734 transitions. [2022-01-19 01:43:23,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6734 transitions. [2022-01-19 01:43:23,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:43:23,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6734 transitions. [2022-01-19 01:43:23,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 140.29166666666666) internal successors, (6734), 48 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:23,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 165.0) internal successors, (8085), 49 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:23,701 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 165.0) internal successors, (8085), 49 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:23,701 INFO L186 Difference]: Start difference. First operand has 430 places, 712 transitions, 7280 flow. Second operand 48 states and 6734 transitions. [2022-01-19 01:43:23,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1254 transitions, 14920 flow [2022-01-19 01:43:26,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1254 transitions, 14757 flow, removed 65 selfloop flow, removed 3 redundant places. [2022-01-19 01:43:26,946 INFO L242 Difference]: Finished difference. Result has 482 places, 750 transitions, 8342 flow [2022-01-19 01:43:26,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8342, PETRI_PLACES=482, PETRI_TRANSITIONS=750} [2022-01-19 01:43:26,947 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 334 predicate places. [2022-01-19 01:43:26,947 INFO L470 AbstractCegarLoop]: Abstraction has has 482 places, 750 transitions, 8342 flow [2022-01-19 01:43:26,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:26,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:43:26,947 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:43:26,963 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 01:43:27,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:27,164 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:43:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:43:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1188778877, now seen corresponding path program 8 times [2022-01-19 01:43:27,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:43:27,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735301204] [2022-01-19 01:43:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:43:27,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:43:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:43:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:27,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:43:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735301204] [2022-01-19 01:43:27,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735301204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:43:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863853095] [2022-01-19 01:43:27,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:43:27,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:27,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:43:27,240 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 01:43:27,269 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 01:43:27,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:43:27,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:43:27,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:43:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:43:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:27,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:43:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:27,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863853095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:43:27,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:43:27,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 01:43:27,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100246708] [2022-01-19 01:43:27,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:43:27,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 01:43:27,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:43:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 01:43:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-19 01:43:27,788 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:43:27,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 750 transitions, 8342 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:27,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:43:27,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:43:27,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:43:35,832 INFO L129 PetriNetUnfolder]: 11603/32427 cut-off events. [2022-01-19 01:43:35,832 INFO L130 PetriNetUnfolder]: For 257886/259284 co-relation queries the response was YES. [2022-01-19 01:43:36,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178640 conditions, 32427 events. 11603/32427 cut-off events. For 257886/259284 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 392860 event pairs, 1871 based on Foata normal form. 95/32274 useless extension candidates. Maximal degree in co-relation 177851. Up to 12821 conditions per place. [2022-01-19 01:43:36,394 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 981 selfloop transitions, 309 changer transitions 14/1455 dead transitions. [2022-01-19 01:43:36,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1455 transitions, 18136 flow [2022-01-19 01:43:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-19 01:43:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-01-19 01:43:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 8402 transitions. [2022-01-19 01:43:36,399 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8486868686868687 [2022-01-19 01:43:36,400 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 8402 transitions. [2022-01-19 01:43:36,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 8402 transitions. [2022-01-19 01:43:36,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:43:36,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 8402 transitions. [2022-01-19 01:43:36,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 140.03333333333333) internal successors, (8402), 60 states have internal predecessors, (8402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:36,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 165.0) internal successors, (10065), 61 states have internal predecessors, (10065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:36,412 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 165.0) internal successors, (10065), 61 states have internal predecessors, (10065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:36,412 INFO L186 Difference]: Start difference. First operand has 482 places, 750 transitions, 8342 flow. Second operand 60 states and 8402 transitions. [2022-01-19 01:43:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1455 transitions, 18136 flow [2022-01-19 01:43:43,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1455 transitions, 17548 flow, removed 109 selfloop flow, removed 27 redundant places. [2022-01-19 01:43:43,070 INFO L242 Difference]: Finished difference. Result has 538 places, 845 transitions, 10134 flow [2022-01-19 01:43:43,070 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7865, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=10134, PETRI_PLACES=538, PETRI_TRANSITIONS=845} [2022-01-19 01:43:43,071 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 390 predicate places. [2022-01-19 01:43:43,071 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 845 transitions, 10134 flow [2022-01-19 01:43:43,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:43,071 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:43:43,071 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:43:43,087 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 01:43:43,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:43,287 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:43:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:43:43,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1328623497, now seen corresponding path program 9 times [2022-01-19 01:43:43,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:43:43,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930456767] [2022-01-19 01:43:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:43:43,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:43:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:43:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:43,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:43:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930456767] [2022-01-19 01:43:43,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930456767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:43:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816136008] [2022-01-19 01:43:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:43:43,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:43:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:43:43,362 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 01:43:43,376 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 01:43:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:43:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:43:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:43:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:43:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:43,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:43:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:43:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816136008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:43:43,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:43:43,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:43:43,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697283197] [2022-01-19 01:43:43,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:43:43,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:43:43,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:43:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:43:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:43:43,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:43:43,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 845 transitions, 10134 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:43,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:43:43,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:43:43,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:43:52,941 INFO L129 PetriNetUnfolder]: 11639/33165 cut-off events. [2022-01-19 01:43:52,941 INFO L130 PetriNetUnfolder]: For 287508/288940 co-relation queries the response was YES. [2022-01-19 01:43:53,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189254 conditions, 33165 events. 11639/33165 cut-off events. For 287508/288940 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 408251 event pairs, 1010 based on Foata normal form. 75/33050 useless extension candidates. Maximal degree in co-relation 187576. Up to 5859 conditions per place. [2022-01-19 01:43:53,839 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 824 selfloop transitions, 462 changer transitions 1/1438 dead transitions. [2022-01-19 01:43:53,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1438 transitions, 18772 flow [2022-01-19 01:43:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-19 01:43:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-01-19 01:43:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7426 transitions. [2022-01-19 01:43:53,844 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491709548313322 [2022-01-19 01:43:53,844 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7426 transitions. [2022-01-19 01:43:53,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7426 transitions. [2022-01-19 01:43:53,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:43:53,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7426 transitions. [2022-01-19 01:43:53,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 140.11320754716982) internal successors, (7426), 53 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:53,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:53,854 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:43:53,854 INFO L186 Difference]: Start difference. First operand has 538 places, 845 transitions, 10134 flow. Second operand 53 states and 7426 transitions. [2022-01-19 01:43:53,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1438 transitions, 18772 flow [2022-01-19 01:44:01,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1438 transitions, 18526 flow, removed 23 selfloop flow, removed 21 redundant places. [2022-01-19 01:44:01,414 INFO L242 Difference]: Finished difference. Result has 578 places, 879 transitions, 11701 flow [2022-01-19 01:44:01,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=9908, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11701, PETRI_PLACES=578, PETRI_TRANSITIONS=879} [2022-01-19 01:44:01,426 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 430 predicate places. [2022-01-19 01:44:01,426 INFO L470 AbstractCegarLoop]: Abstraction has has 578 places, 879 transitions, 11701 flow [2022-01-19 01:44:01,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:01,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:44:01,427 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:44:01,443 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 01:44:01,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 01:44:01,627 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:44:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:44:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash -836445719, now seen corresponding path program 10 times [2022-01-19 01:44:01,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:44:01,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833411136] [2022-01-19 01:44:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:44:01,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:44:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:44:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:01,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:44:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833411136] [2022-01-19 01:44:01,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833411136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:44:01,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921994022] [2022-01-19 01:44:01,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:44:01,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:44:01,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:44:01,703 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 01:44:01,703 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 01:44:01,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:44:01,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:44:01,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:44:01,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:44:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:02,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:44:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:02,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921994022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:44:02,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:44:02,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 01:44:02,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686017197] [2022-01-19 01:44:02,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:44:02,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 01:44:02,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:44:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 01:44:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-19 01:44:02,187 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:44:02,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 879 transitions, 11701 flow. Second operand has 17 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:02,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:44:02,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:44:02,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:44:12,609 INFO L129 PetriNetUnfolder]: 12743/36612 cut-off events. [2022-01-19 01:44:12,609 INFO L130 PetriNetUnfolder]: For 393271/394831 co-relation queries the response was YES. [2022-01-19 01:44:13,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221308 conditions, 36612 events. 12743/36612 cut-off events. For 393271/394831 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 461224 event pairs, 1874 based on Foata normal form. 83/36388 useless extension candidates. Maximal degree in co-relation 220320. Up to 10600 conditions per place. [2022-01-19 01:44:13,732 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 853 selfloop transitions, 426 changer transitions 1/1431 dead transitions. [2022-01-19 01:44:13,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1431 transitions, 20137 flow [2022-01-19 01:44:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 01:44:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 01:44:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5623 transitions. [2022-01-19 01:44:13,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8519696969696969 [2022-01-19 01:44:13,736 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5623 transitions. [2022-01-19 01:44:13,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5623 transitions. [2022-01-19 01:44:13,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:44:13,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5623 transitions. [2022-01-19 01:44:13,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 140.575) internal successors, (5623), 40 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:13,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:13,743 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:13,743 INFO L186 Difference]: Start difference. First operand has 578 places, 879 transitions, 11701 flow. Second operand 40 states and 5623 transitions. [2022-01-19 01:44:13,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1431 transitions, 20137 flow [2022-01-19 01:44:28,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1431 transitions, 19635 flow, removed 77 selfloop flow, removed 25 redundant places. [2022-01-19 01:44:28,326 INFO L242 Difference]: Finished difference. Result has 607 places, 944 transitions, 13400 flow [2022-01-19 01:44:28,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=11251, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=13400, PETRI_PLACES=607, PETRI_TRANSITIONS=944} [2022-01-19 01:44:28,327 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 459 predicate places. [2022-01-19 01:44:28,327 INFO L470 AbstractCegarLoop]: Abstraction has has 607 places, 944 transitions, 13400 flow [2022-01-19 01:44:28,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:28,327 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:44:28,327 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:44:28,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 01:44:28,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:44:28,528 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:44:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:44:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 603723001, now seen corresponding path program 11 times [2022-01-19 01:44:28,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:44:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366131853] [2022-01-19 01:44:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:44:28,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:44:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:44:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:28,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:44:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366131853] [2022-01-19 01:44:28,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366131853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:44:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138090125] [2022-01-19 01:44:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:44:28,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:44:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:44:28,618 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 01:44:28,618 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 01:44:28,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 01:44:28,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:44:28,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:44:28,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:44:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:28,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:44:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:29,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138090125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:44:29,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:44:29,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 01:44:29,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998704816] [2022-01-19 01:44:29,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:44:29,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 01:44:29,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:44:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 01:44:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-19 01:44:29,077 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:44:29,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 944 transitions, 13400 flow. Second operand has 16 states, 16 states have (on average 137.8125) internal successors, (2205), 16 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:29,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:44:29,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:44:29,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:44:40,211 INFO L129 PetriNetUnfolder]: 12784/36749 cut-off events. [2022-01-19 01:44:40,212 INFO L130 PetriNetUnfolder]: For 480164/481755 co-relation queries the response was YES. [2022-01-19 01:44:41,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238026 conditions, 36749 events. 12784/36749 cut-off events. For 480164/481755 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 463589 event pairs, 2209 based on Foata normal form. 57/36508 useless extension candidates. Maximal degree in co-relation 236929. Up to 13439 conditions per place. [2022-01-19 01:44:41,416 INFO L132 encePairwiseOnDemand]: 152/165 looper letters, 785 selfloop transitions, 253 changer transitions 23/1212 dead transitions. [2022-01-19 01:44:41,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1212 transitions, 18275 flow [2022-01-19 01:44:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 01:44:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 01:44:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2533 transitions. [2022-01-19 01:44:41,422 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528619528619529 [2022-01-19 01:44:41,422 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2533 transitions. [2022-01-19 01:44:41,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2533 transitions. [2022-01-19 01:44:41,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:44:41,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2533 transitions. [2022-01-19 01:44:41,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 140.72222222222223) internal successors, (2533), 18 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:41,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:41,425 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:41,425 INFO L186 Difference]: Start difference. First operand has 607 places, 944 transitions, 13400 flow. Second operand 18 states and 2533 transitions. [2022-01-19 01:44:41,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1212 transitions, 18275 flow [2022-01-19 01:44:56,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1212 transitions, 18050 flow, removed 39 selfloop flow, removed 15 redundant places. [2022-01-19 01:44:56,083 INFO L242 Difference]: Finished difference. Result has 615 places, 955 transitions, 14078 flow [2022-01-19 01:44:56,084 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=13209, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14078, PETRI_PLACES=615, PETRI_TRANSITIONS=955} [2022-01-19 01:44:56,085 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 467 predicate places. [2022-01-19 01:44:56,085 INFO L470 AbstractCegarLoop]: Abstraction has has 615 places, 955 transitions, 14078 flow [2022-01-19 01:44:56,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 137.8125) internal successors, (2205), 16 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:56,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:44:56,085 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:44:56,119 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 01:44:56,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:44:56,302 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:44:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:44:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -707940439, now seen corresponding path program 12 times [2022-01-19 01:44:56,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:44:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908892370] [2022-01-19 01:44:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:44:56,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:44:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:44:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:56,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:44:56,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908892370] [2022-01-19 01:44:56,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908892370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:44:56,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744738466] [2022-01-19 01:44:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:44:56,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:44:56,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:44:56,384 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 01:44:56,427 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 01:44:56,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 01:44:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:44:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:44:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:44:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:56,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:44:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:44:56,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744738466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:44:56,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:44:56,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 01:44:56,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785748090] [2022-01-19 01:44:56,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:44:56,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 01:44:56,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:44:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 01:44:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-19 01:44:56,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:44:56,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 955 transitions, 14078 flow. Second operand has 17 states, 17 states have (on average 137.64705882352942) internal successors, (2340), 17 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:56,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:44:56,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:44:56,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:08,445 INFO L129 PetriNetUnfolder]: 12765/36677 cut-off events. [2022-01-19 01:45:08,445 INFO L130 PetriNetUnfolder]: For 476254/477840 co-relation queries the response was YES. [2022-01-19 01:45:09,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242223 conditions, 36677 events. 12765/36677 cut-off events. For 476254/477840 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 462342 event pairs, 1829 based on Foata normal form. 57/36474 useless extension candidates. Maximal degree in co-relation 241910. Up to 13440 conditions per place. [2022-01-19 01:45:09,812 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 869 selfloop transitions, 375 changer transitions 1/1396 dead transitions. [2022-01-19 01:45:09,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1396 transitions, 20990 flow [2022-01-19 01:45:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 01:45:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 01:45:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5470 transitions. [2022-01-19 01:45:09,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.85003885003885 [2022-01-19 01:45:09,815 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5470 transitions. [2022-01-19 01:45:09,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5470 transitions. [2022-01-19 01:45:09,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:09,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5470 transitions. [2022-01-19 01:45:09,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 140.25641025641025) internal successors, (5470), 39 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:09,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 165.0) internal successors, (6600), 40 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:09,822 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 165.0) internal successors, (6600), 40 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:09,822 INFO L186 Difference]: Start difference. First operand has 615 places, 955 transitions, 14078 flow. Second operand 39 states and 5470 transitions. [2022-01-19 01:45:09,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1396 transitions, 20990 flow [2022-01-19 01:45:24,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1396 transitions, 20592 flow, removed 61 selfloop flow, removed 12 redundant places. [2022-01-19 01:45:24,703 INFO L242 Difference]: Finished difference. Result has 640 places, 963 transitions, 14723 flow [2022-01-19 01:45:24,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=13752, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14723, PETRI_PLACES=640, PETRI_TRANSITIONS=963} [2022-01-19 01:45:24,704 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 492 predicate places. [2022-01-19 01:45:24,704 INFO L470 AbstractCegarLoop]: Abstraction has has 640 places, 963 transitions, 14723 flow [2022-01-19 01:45:24,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.64705882352942) internal successors, (2340), 17 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:24,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:24,704 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:24,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:24,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:24,912 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1496903569, now seen corresponding path program 13 times [2022-01-19 01:45:24,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301381587] [2022-01-19 01:45:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:24,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:45:25,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:25,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301381587] [2022-01-19 01:45:25,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301381587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:25,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67148916] [2022-01-19 01:45:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:45:25,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:25,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:45:25,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 01:45:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:25,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:45:25,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:45:25,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:45:25,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67148916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:25,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:25,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 01:45:25,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755077921] [2022-01-19 01:45:25,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 01:45:25,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 01:45:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-19 01:45:25,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:45:25,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 963 transitions, 14723 flow. Second operand has 18 states, 18 states have (on average 137.61111111111111) internal successors, (2477), 18 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:25,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:25,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:45:25,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:36,673 INFO L129 PetriNetUnfolder]: 12798/37126 cut-off events. [2022-01-19 01:45:36,674 INFO L130 PetriNetUnfolder]: For 470795/472441 co-relation queries the response was YES. [2022-01-19 01:45:37,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244661 conditions, 37126 events. 12798/37126 cut-off events. For 470795/472441 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 472132 event pairs, 2015 based on Foata normal form. 83/36942 useless extension candidates. Maximal degree in co-relation 243389. Up to 13440 conditions per place. [2022-01-19 01:45:37,965 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 797 selfloop transitions, 327 changer transitions 12/1287 dead transitions. [2022-01-19 01:45:37,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1287 transitions, 20236 flow [2022-01-19 01:45:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 01:45:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 01:45:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3650 transitions. [2022-01-19 01:45:37,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508158508158508 [2022-01-19 01:45:37,967 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3650 transitions. [2022-01-19 01:45:37,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3650 transitions. [2022-01-19 01:45:37,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:45:37,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3650 transitions. [2022-01-19 01:45:37,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 140.3846153846154) internal successors, (3650), 26 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 165.0) internal successors, (4455), 27 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,972 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 165.0) internal successors, (4455), 27 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:37,972 INFO L186 Difference]: Start difference. First operand has 640 places, 963 transitions, 14723 flow. Second operand 26 states and 3650 transitions. [2022-01-19 01:45:37,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1287 transitions, 20236 flow [2022-01-19 01:45:52,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 1287 transitions, 19822 flow, removed 14 selfloop flow, removed 23 redundant places. [2022-01-19 01:45:52,044 INFO L242 Difference]: Finished difference. Result has 646 places, 972 transitions, 15277 flow [2022-01-19 01:45:52,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=14316, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15277, PETRI_PLACES=646, PETRI_TRANSITIONS=972} [2022-01-19 01:45:52,045 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 498 predicate places. [2022-01-19 01:45:52,045 INFO L470 AbstractCegarLoop]: Abstraction has has 646 places, 972 transitions, 15277 flow [2022-01-19 01:45:52,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.61111111111111) internal successors, (2477), 18 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:45:52,046 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:45:52,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:52,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 01:45:52,246 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:45:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:45:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1428389443, now seen corresponding path program 14 times [2022-01-19 01:45:52,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:45:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428523763] [2022-01-19 01:45:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:45:52,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:45:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:45:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:45:52,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:45:52,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428523763] [2022-01-19 01:45:52,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428523763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:45:52,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706422608] [2022-01-19 01:45:52,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:45:52,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:45:52,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:45:52,322 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:45:52,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 01:45:52,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:45:52,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:45:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:45:52,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:45:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:45:52,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:45:52,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706422608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:52,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:52,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 01:45:52,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622872162] [2022-01-19 01:45:52,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:52,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 01:45:52,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 01:45:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-19 01:45:52,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:45:52,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 972 transitions, 15277 flow. Second operand has 18 states, 18 states have (on average 137.55555555555554) internal successors, (2476), 18 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:52,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:52,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:45:52,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:04,306 INFO L129 PetriNetUnfolder]: 12682/36686 cut-off events. [2022-01-19 01:46:04,306 INFO L130 PetriNetUnfolder]: For 486798/488412 co-relation queries the response was YES. [2022-01-19 01:46:05,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246068 conditions, 36686 events. 12682/36686 cut-off events. For 486798/488412 co-relation queries the response was YES. Maximal size of possible extension queue 1599. Compared 464605 event pairs, 1834 based on Foata normal form. 84/36518 useless extension candidates. Maximal degree in co-relation 244719. Up to 13434 conditions per place. [2022-01-19 01:46:05,588 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 856 selfloop transitions, 384 changer transitions 10/1401 dead transitions. [2022-01-19 01:46:05,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1401 transitions, 21923 flow [2022-01-19 01:46:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 01:46:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 01:46:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5743 transitions. [2022-01-19 01:46:05,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8489283074648928 [2022-01-19 01:46:05,591 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5743 transitions. [2022-01-19 01:46:05,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5743 transitions. [2022-01-19 01:46:05,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:05,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5743 transitions. [2022-01-19 01:46:05,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 140.0731707317073) internal successors, (5743), 41 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:05,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 165.0) internal successors, (6930), 42 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:05,597 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 165.0) internal successors, (6930), 42 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:05,598 INFO L186 Difference]: Start difference. First operand has 646 places, 972 transitions, 15277 flow. Second operand 41 states and 5743 transitions. [2022-01-19 01:46:05,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1401 transitions, 21923 flow [2022-01-19 01:46:20,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1401 transitions, 21513 flow, removed 5 selfloop flow, removed 19 redundant places. [2022-01-19 01:46:20,215 INFO L242 Difference]: Finished difference. Result has 668 places, 973 transitions, 15689 flow [2022-01-19 01:46:20,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=14807, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=15689, PETRI_PLACES=668, PETRI_TRANSITIONS=973} [2022-01-19 01:46:20,216 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 520 predicate places. [2022-01-19 01:46:20,216 INFO L470 AbstractCegarLoop]: Abstraction has has 668 places, 973 transitions, 15689 flow [2022-01-19 01:46:20,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.55555555555554) internal successors, (2476), 18 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:20,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:46:20,217 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:46:20,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 01:46:20,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 01:46:20,423 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:46:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:46:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 733606519, now seen corresponding path program 15 times [2022-01-19 01:46:20,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:46:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965756697] [2022-01-19 01:46:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:46:20,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:46:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:46:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:46:20,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:46:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965756697] [2022-01-19 01:46:20,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965756697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:46:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144922430] [2022-01-19 01:46:20,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:46:20,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:46:20,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:46:20,502 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:46:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 01:46:20,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:46:20,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:46:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 01:46:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:46:21,186 INFO L353 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-01-19 01:46:21,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 21 [2022-01-19 01:46:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:46:21,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:46:21,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 01:46:21,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 70 [2022-01-19 01:46:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:46:22,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144922430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:46:22,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:46:22,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 12] total 31 [2022-01-19 01:46:22,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908890406] [2022-01-19 01:46:22,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:46:22,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 01:46:22,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:46:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 01:46:22,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-19 01:46:22,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 165 [2022-01-19 01:46:22,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 973 transitions, 15689 flow. Second operand has 31 states, 31 states have (on average 72.03225806451613) internal successors, (2233), 31 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:22,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:46:22,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 165 [2022-01-19 01:46:22,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:46:45,314 INFO L129 PetriNetUnfolder]: 33869/72542 cut-off events. [2022-01-19 01:46:45,314 INFO L130 PetriNetUnfolder]: For 910348/910387 co-relation queries the response was YES. [2022-01-19 01:46:47,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 473089 conditions, 72542 events. 33869/72542 cut-off events. For 910348/910387 co-relation queries the response was YES. Maximal size of possible extension queue 3237. Compared 874912 event pairs, 3949 based on Foata normal form. 176/72289 useless extension candidates. Maximal degree in co-relation 470371. Up to 39279 conditions per place. [2022-01-19 01:46:47,912 INFO L132 encePairwiseOnDemand]: 130/165 looper letters, 1119 selfloop transitions, 398 changer transitions 158/1730 dead transitions. [2022-01-19 01:46:47,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 1730 transitions, 29849 flow [2022-01-19 01:46:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 01:46:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 01:46:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4612 transitions. [2022-01-19 01:46:47,915 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43002331002331 [2022-01-19 01:46:47,915 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4612 transitions. [2022-01-19 01:46:47,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4612 transitions. [2022-01-19 01:46:47,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:46:47,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4612 transitions. [2022-01-19 01:46:47,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 70.95384615384616) internal successors, (4612), 65 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:47,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 165.0) internal successors, (10890), 66 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:47,923 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 165.0) internal successors, (10890), 66 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:46:47,923 INFO L186 Difference]: Start difference. First operand has 668 places, 973 transitions, 15689 flow. Second operand 65 states and 4612 transitions. [2022-01-19 01:46:47,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 1730 transitions, 29849 flow [2022-01-19 01:47:32,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 1730 transitions, 28761 flow, removed 2 selfloop flow, removed 35 redundant places. [2022-01-19 01:47:33,005 INFO L242 Difference]: Finished difference. Result has 727 places, 1106 transitions, 18005 flow [2022-01-19 01:47:33,006 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=15087, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=18005, PETRI_PLACES=727, PETRI_TRANSITIONS=1106} [2022-01-19 01:47:33,007 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 579 predicate places. [2022-01-19 01:47:33,007 INFO L470 AbstractCegarLoop]: Abstraction has has 727 places, 1106 transitions, 18005 flow [2022-01-19 01:47:33,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.03225806451613) internal successors, (2233), 31 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:33,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:47:33,007 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:47:33,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 01:47:33,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 01:47:33,216 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:47:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:47:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 938411575, now seen corresponding path program 16 times [2022-01-19 01:47:33,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:47:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654501860] [2022-01-19 01:47:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:47:33,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:47:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:47:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:47:33,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:47:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654501860] [2022-01-19 01:47:33,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654501860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:47:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563022657] [2022-01-19 01:47:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:47:33,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:47:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:47:33,290 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:47:33,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 01:47:33,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:47:33,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:47:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:47:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:47:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:47:33,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:47:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 01:47:33,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563022657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:47:33,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:47:33,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 01:47:33,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404864028] [2022-01-19 01:47:33,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:47:33,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:47:33,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:47:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:47:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:47:33,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:47:33,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1106 transitions, 18005 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:33,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:47:33,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:47:33,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:47:49,954 INFO L129 PetriNetUnfolder]: 15350/42805 cut-off events. [2022-01-19 01:47:49,954 INFO L130 PetriNetUnfolder]: For 648461/650453 co-relation queries the response was YES. [2022-01-19 01:47:51,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 299732 conditions, 42805 events. 15350/42805 cut-off events. For 648461/650453 co-relation queries the response was YES. Maximal size of possible extension queue 1835. Compared 538647 event pairs, 2719 based on Foata normal form. 89/42624 useless extension candidates. Maximal degree in co-relation 298510. Up to 16665 conditions per place. [2022-01-19 01:47:51,886 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1175 selfloop transitions, 498 changer transitions 27/1852 dead transitions. [2022-01-19 01:47:51,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 1852 transitions, 31612 flow [2022-01-19 01:47:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-19 01:47:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-01-19 01:47:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 8941 transitions. [2022-01-19 01:47:51,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.846685606060606 [2022-01-19 01:47:51,890 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 8941 transitions. [2022-01-19 01:47:51,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 8941 transitions. [2022-01-19 01:47:51,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:47:51,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 8941 transitions. [2022-01-19 01:47:51,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 139.703125) internal successors, (8941), 64 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:51,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:51,902 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:47:51,902 INFO L186 Difference]: Start difference. First operand has 727 places, 1106 transitions, 18005 flow. Second operand 64 states and 8941 transitions. [2022-01-19 01:47:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 1852 transitions, 31612 flow [2022-01-19 01:48:14,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 1852 transitions, 30651 flow, removed 119 selfloop flow, removed 43 redundant places. [2022-01-19 01:48:14,094 INFO L242 Difference]: Finished difference. Result has 750 places, 1355 transitions, 23292 flow [2022-01-19 01:48:14,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=17184, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=23292, PETRI_PLACES=750, PETRI_TRANSITIONS=1355} [2022-01-19 01:48:14,095 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 602 predicate places. [2022-01-19 01:48:14,095 INFO L470 AbstractCegarLoop]: Abstraction has has 750 places, 1355 transitions, 23292 flow [2022-01-19 01:48:14,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:14,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:48:14,095 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:48:14,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 01:48:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:14,296 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:48:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:48:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash 715572635, now seen corresponding path program 17 times [2022-01-19 01:48:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:48:14,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193501090] [2022-01-19 01:48:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:48:14,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:48:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:48:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:48:14,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:48:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193501090] [2022-01-19 01:48:14,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193501090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:48:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363093379] [2022-01-19 01:48:14,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:48:14,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:48:14,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:48:14,374 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:48:14,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 01:48:14,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 01:48:14,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:48:14,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:48:14,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:48:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:48:14,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:48:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:48:14,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363093379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:48:14,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:48:14,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 01:48:14,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240377072] [2022-01-19 01:48:14,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:48:14,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:48:14,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:48:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:48:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:48:14,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:48:14,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1355 transitions, 23292 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:14,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:48:14,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:48:14,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:48:37,930 INFO L129 PetriNetUnfolder]: 19434/55035 cut-off events. [2022-01-19 01:48:37,930 INFO L130 PetriNetUnfolder]: For 963102/965701 co-relation queries the response was YES. [2022-01-19 01:48:40,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397661 conditions, 55035 events. 19434/55035 cut-off events. For 963102/965701 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 722945 event pairs, 2534 based on Foata normal form. 247/54887 useless extension candidates. Maximal degree in co-relation 395599. Up to 12379 conditions per place. [2022-01-19 01:48:40,473 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1257 selfloop transitions, 845 changer transitions 18/2272 dead transitions. [2022-01-19 01:48:40,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 2272 transitions, 41034 flow [2022-01-19 01:48:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 01:48:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 01:48:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 8843 transitions. [2022-01-19 01:48:40,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8506974506974507 [2022-01-19 01:48:40,476 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 8843 transitions. [2022-01-19 01:48:40,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 8843 transitions. [2022-01-19 01:48:40,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:48:40,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 8843 transitions. [2022-01-19 01:48:40,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 140.36507936507937) internal successors, (8843), 63 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:40,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:40,487 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:48:40,487 INFO L186 Difference]: Start difference. First operand has 750 places, 1355 transitions, 23292 flow. Second operand 63 states and 8843 transitions. [2022-01-19 01:48:40,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 2272 transitions, 41034 flow [2022-01-19 01:49:27,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 2272 transitions, 39910 flow, removed 501 selfloop flow, removed 9 redundant places. [2022-01-19 01:49:27,147 INFO L242 Difference]: Finished difference. Result has 824 places, 1614 transitions, 30119 flow [2022-01-19 01:49:27,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=22378, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=30119, PETRI_PLACES=824, PETRI_TRANSITIONS=1614} [2022-01-19 01:49:27,149 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 676 predicate places. [2022-01-19 01:49:27,149 INFO L470 AbstractCegarLoop]: Abstraction has has 824 places, 1614 transitions, 30119 flow [2022-01-19 01:49:27,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:27,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:49:27,149 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:49:27,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 01:49:27,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:27,365 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:49:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:49:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash 44498919, now seen corresponding path program 18 times [2022-01-19 01:49:27,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:49:27,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998151088] [2022-01-19 01:49:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:49:27,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:49:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:49:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:49:27,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:49:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998151088] [2022-01-19 01:49:27,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998151088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:49:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344264590] [2022-01-19 01:49:27,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:49:27,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:49:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:49:27,449 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:49:27,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 01:49:27,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 01:49:27,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:49:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:49:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:49:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:49:27,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:49:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:49:27,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344264590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:49:27,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:49:27,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 01:49:27,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863440616] [2022-01-19 01:49:27,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:49:27,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 01:49:27,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:49:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 01:49:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-19 01:49:27,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:49:27,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 1614 transitions, 30119 flow. Second operand has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:27,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:49:27,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:49:27,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:49:54,304 INFO L129 PetriNetUnfolder]: 19434/54927 cut-off events. [2022-01-19 01:49:54,305 INFO L130 PetriNetUnfolder]: For 1226599/1229104 co-relation queries the response was YES. [2022-01-19 01:49:56,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 430234 conditions, 54927 events. 19434/54927 cut-off events. For 1226599/1229104 co-relation queries the response was YES. Maximal size of possible extension queue 2349. Compared 721075 event pairs, 4125 based on Foata normal form. 59/54559 useless extension candidates. Maximal degree in co-relation 428307. Up to 29243 conditions per place. [2022-01-19 01:49:57,242 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1207 selfloop transitions, 370 changer transitions 19/1748 dead transitions. [2022-01-19 01:49:57,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 1748 transitions, 34858 flow [2022-01-19 01:49:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 01:49:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 01:49:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2247 transitions. [2022-01-19 01:49:57,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8511363636363637 [2022-01-19 01:49:57,244 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2247 transitions. [2022-01-19 01:49:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2247 transitions. [2022-01-19 01:49:57,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:49:57,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2247 transitions. [2022-01-19 01:49:57,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 140.4375) internal successors, (2247), 16 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:57,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:57,247 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:49:57,247 INFO L186 Difference]: Start difference. First operand has 824 places, 1614 transitions, 30119 flow. Second operand 16 states and 2247 transitions. [2022-01-19 01:49:57,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 1748 transitions, 34858 flow [2022-01-19 01:50:54,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 818 places, 1748 transitions, 34043 flow, removed 299 selfloop flow, removed 20 redundant places. [2022-01-19 01:50:54,726 INFO L242 Difference]: Finished difference. Result has 821 places, 1612 transitions, 30041 flow [2022-01-19 01:50:54,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=29318, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=30041, PETRI_PLACES=821, PETRI_TRANSITIONS=1612} [2022-01-19 01:50:54,728 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 673 predicate places. [2022-01-19 01:50:54,728 INFO L470 AbstractCegarLoop]: Abstraction has has 821 places, 1612 transitions, 30041 flow [2022-01-19 01:50:54,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:54,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:50:54,729 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:50:54,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 01:50:54,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 01:50:54,943 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:50:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:50:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1121249541, now seen corresponding path program 19 times [2022-01-19 01:50:54,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:50:54,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790550199] [2022-01-19 01:50:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:50:54,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:50:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:50:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:50:55,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:50:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790550199] [2022-01-19 01:50:55,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790550199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:50:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038042433] [2022-01-19 01:50:55,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:50:55,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:50:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:50:55,012 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:50:55,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 01:50:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:50:55,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:50:55,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:50:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:50:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:50:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 01:50:55,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038042433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:50:55,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:50:55,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 01:50:55,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755064789] [2022-01-19 01:50:55,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:50:55,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:50:55,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:50:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:50:55,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:50:55,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:50:55,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1612 transitions, 30041 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:50:55,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:50:55,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:50:55,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:51:21,729 INFO L129 PetriNetUnfolder]: 19392/55869 cut-off events. [2022-01-19 01:51:21,729 INFO L130 PetriNetUnfolder]: For 1249377/1251898 co-relation queries the response was YES. [2022-01-19 01:51:24,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 431869 conditions, 55869 events. 19392/55869 cut-off events. For 1249377/1251898 co-relation queries the response was YES. Maximal size of possible extension queue 2387. Compared 740532 event pairs, 2900 based on Foata normal form. 98/55643 useless extension candidates. Maximal degree in co-relation 429927. Up to 18083 conditions per place. [2022-01-19 01:51:24,812 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1371 selfloop transitions, 677 changer transitions 39/2239 dead transitions. [2022-01-19 01:51:24,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 2239 transitions, 42119 flow [2022-01-19 01:51:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 01:51:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 01:51:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8003 transitions. [2022-01-19 01:51:24,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8509303561935141 [2022-01-19 01:51:24,816 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8003 transitions. [2022-01-19 01:51:24,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8003 transitions. [2022-01-19 01:51:24,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:51:24,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8003 transitions. [2022-01-19 01:51:24,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 140.40350877192984) internal successors, (8003), 57 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:24,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 165.0) internal successors, (9570), 58 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:24,827 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 165.0) internal successors, (9570), 58 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:51:24,827 INFO L186 Difference]: Start difference. First operand has 821 places, 1612 transitions, 30041 flow. Second operand 57 states and 8003 transitions. [2022-01-19 01:51:24,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 2239 transitions, 42119 flow [2022-01-19 01:52:16,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 2239 transitions, 41315 flow, removed 18 selfloop flow, removed 12 redundant places. [2022-01-19 01:52:16,067 INFO L242 Difference]: Finished difference. Result has 872 places, 1645 transitions, 31881 flow [2022-01-19 01:52:16,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=29294, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=31881, PETRI_PLACES=872, PETRI_TRANSITIONS=1645} [2022-01-19 01:52:16,068 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 724 predicate places. [2022-01-19 01:52:16,069 INFO L470 AbstractCegarLoop]: Abstraction has has 872 places, 1645 transitions, 31881 flow [2022-01-19 01:52:16,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:16,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:52:16,069 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:52:16,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 01:52:16,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-19 01:52:16,270 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:52:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:52:16,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1445349883, now seen corresponding path program 20 times [2022-01-19 01:52:16,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:52:16,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006629282] [2022-01-19 01:52:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:52:16,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:52:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:52:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:52:16,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:52:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006629282] [2022-01-19 01:52:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006629282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:52:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780021506] [2022-01-19 01:52:16,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:52:16,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:52:16,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:52:16,348 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:52:16,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 01:52:16,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:52:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:52:16,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:52:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:52:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:52:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:52:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:52:16,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780021506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:52:16,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:52:16,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 01:52:16,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339998868] [2022-01-19 01:52:16,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:52:16,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 01:52:16,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:52:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 01:52:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-19 01:52:16,861 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:52:16,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 1645 transitions, 31881 flow. Second operand has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:16,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:52:16,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:52:16,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:52:46,723 INFO L129 PetriNetUnfolder]: 21330/61225 cut-off events. [2022-01-19 01:52:46,723 INFO L130 PetriNetUnfolder]: For 1434576/1437426 co-relation queries the response was YES. [2022-01-19 01:52:50,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482497 conditions, 61225 events. 21330/61225 cut-off events. For 1434576/1437426 co-relation queries the response was YES. Maximal size of possible extension queue 2569. Compared 818923 event pairs, 3219 based on Foata normal form. 99/60956 useless extension candidates. Maximal degree in co-relation 482290. Up to 20304 conditions per place. [2022-01-19 01:52:50,457 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1513 selfloop transitions, 760 changer transitions 46/2471 dead transitions. [2022-01-19 01:52:50,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 2471 transitions, 47676 flow [2022-01-19 01:52:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 01:52:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 01:52:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 9519 transitions. [2022-01-19 01:52:50,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8483957219251337 [2022-01-19 01:52:50,463 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 9519 transitions. [2022-01-19 01:52:50,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 9519 transitions. [2022-01-19 01:52:50,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:52:50,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 9519 transitions. [2022-01-19 01:52:50,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 139.98529411764707) internal successors, (9519), 68 states have internal predecessors, (9519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:50,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 165.0) internal successors, (11385), 69 states have internal predecessors, (11385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:50,477 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 165.0) internal successors, (11385), 69 states have internal predecessors, (11385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:52:50,477 INFO L186 Difference]: Start difference. First operand has 872 places, 1645 transitions, 31881 flow. Second operand 68 states and 9519 transitions. [2022-01-19 01:52:50,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 2471 transitions, 47676 flow [2022-01-19 01:53:57,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 2471 transitions, 46657 flow, removed 132 selfloop flow, removed 28 redundant places. [2022-01-19 01:53:57,343 INFO L242 Difference]: Finished difference. Result has 938 places, 1784 transitions, 36437 flow [2022-01-19 01:53:57,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=31036, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=36437, PETRI_PLACES=938, PETRI_TRANSITIONS=1784} [2022-01-19 01:53:57,344 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 790 predicate places. [2022-01-19 01:53:57,344 INFO L470 AbstractCegarLoop]: Abstraction has has 938 places, 1784 transitions, 36437 flow [2022-01-19 01:53:57,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:57,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:53:57,345 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:53:57,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 01:53:57,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:53:57,552 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:53:57,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:53:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1866618803, now seen corresponding path program 21 times [2022-01-19 01:53:57,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:53:57,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600390464] [2022-01-19 01:53:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:53:57,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:53:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:53:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:53:57,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:53:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600390464] [2022-01-19 01:53:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600390464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:53:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942350963] [2022-01-19 01:53:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:53:57,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:53:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:53:57,623 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:53:57,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-19 01:53:57,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:53:57,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:53:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 01:53:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:53:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:53:57,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:53:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 01:53:58,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942350963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:53:58,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:53:58,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 01:53:58,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938118792] [2022-01-19 01:53:58,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:53:58,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 01:53:58,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:53:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 01:53:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-19 01:53:58,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 01:53:58,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 1784 transitions, 36437 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:53:58,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:53:58,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 01:53:58,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand