./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:17:23,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:17:23,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:17:23,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:17:23,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:17:23,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:17:23,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:17:23,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:17:23,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:17:23,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:17:23,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:17:23,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:17:23,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:17:23,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:17:23,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:17:23,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:17:23,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:17:23,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:17:23,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:17:23,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:17:23,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:17:23,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:17:23,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:17:23,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:17:23,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:17:23,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:17:23,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:17:23,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:17:23,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:17:23,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:17:23,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:17:23,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:17:23,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:17:23,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:17:23,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:17:23,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:17:23,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:17:23,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:17:23,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:17:23,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:17:23,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:17:23,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:17:24,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:17:24,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:17:24,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:17:24,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:17:24,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:17:24,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:17:24,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:17:24,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:17:24,025 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:17:24,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:17:24,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:17:24,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:17:24,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:17:24,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:17:24,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:17:24,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:17:24,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:17:24,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:17:24,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:17:24,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:17:24,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:17:24,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:17:24,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:17:24,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:17:24,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:17:24,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:17:24,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:17:24,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:17:24,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:17:24,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:17:24,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:17:24,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:17:24,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:17:24,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:17:24,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2021-12-21 15:17:24,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:17:24,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:17:24,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:17:24,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:17:24,286 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:17:24,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-12-21 15:17:24,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b8eb68a8/4d91ad2f945a4d169ded79d1a1ad21ae/FLAG625ca6c6e [2021-12-21 15:17:24,774 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:17:24,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-12-21 15:17:24,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b8eb68a8/4d91ad2f945a4d169ded79d1a1ad21ae/FLAG625ca6c6e [2021-12-21 15:17:24,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b8eb68a8/4d91ad2f945a4d169ded79d1a1ad21ae [2021-12-21 15:17:24,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:17:24,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:17:24,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:17:24,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:17:24,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:17:24,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:17:24" (1/1) ... [2021-12-21 15:17:24,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e4fd92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:24, skipping insertion in model container [2021-12-21 15:17:24,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:17:24" (1/1) ... [2021-12-21 15:17:24,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:17:24,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:17:25,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2021-12-21 15:17:25,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:17:25,097 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:17:25,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2021-12-21 15:17:25,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:17:25,156 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:17:25,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25 WrapperNode [2021-12-21 15:17:25,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:17:25,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:17:25,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:17:25,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:17:25,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,207 INFO L137 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2021-12-21 15:17:25,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:17:25,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:17:25,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:17:25,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:17:25,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:17:25,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:17:25,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:17:25,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:17:25,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (1/1) ... [2021-12-21 15:17:25,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:17:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:25,285 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) [2021-12-21 15:17:25,303 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 [2021-12-21 15:17:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:17:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:17:25,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:17:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:17:25,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:17:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:17:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:17:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:17:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:17:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:17:25,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:17:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:17:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:17:25,319 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:17:25,414 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:17:25,415 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:17:25,758 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:17:25,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:17:25,772 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 15:17:25,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:17:25 BoogieIcfgContainer [2021-12-21 15:17:25,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:17:25,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:17:25,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:17:25,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:17:25,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:17:24" (1/3) ... [2021-12-21 15:17:25,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7184d091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:17:25, skipping insertion in model container [2021-12-21 15:17:25,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:25" (2/3) ... [2021-12-21 15:17:25,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7184d091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:17:25, skipping insertion in model container [2021-12-21 15:17:25,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:17:25" (3/3) ... [2021-12-21 15:17:25,781 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2021-12-21 15:17:25,785 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:17:25,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:17:25,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:17:25,786 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:17:25,834 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,834 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,835 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,835 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,837 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,838 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,839 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,841 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,843 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,843 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,843 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,843 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,843 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,846 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,846 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,846 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,871 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,871 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,872 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,872 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,873 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,873 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,874 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,874 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,875 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,878 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,878 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,878 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,880 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,880 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,880 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,880 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,880 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,881 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,881 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,881 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,881 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,881 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,884 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,885 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,885 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,885 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,887 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,887 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,887 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,888 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,890 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,891 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,891 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,891 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,891 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,891 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,892 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,892 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,892 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,893 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,896 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,897 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,903 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,904 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,905 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,908 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,908 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,909 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,909 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,910 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,921 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,921 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,925 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,925 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,926 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,929 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,930 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:25,936 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:17:25,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:17:25,994 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=true, 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 [2021-12-21 15:17:25,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:17:26,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2021-12-21 15:17:26,114 INFO L129 PetriNetUnfolder]: 25/244 cut-off events. [2021-12-21 15:17:26,115 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:17:26,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 312 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2021-12-21 15:17:26,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2021-12-21 15:17:26,133 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2021-12-21 15:17:26,168 INFO L129 PetriNetUnfolder]: 25/234 cut-off events. [2021-12-21 15:17:26,169 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:17:26,171 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:26,172 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] [2021-12-21 15:17:26,173 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:26,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1238378754, now seen corresponding path program 1 times [2021-12-21 15:17:26,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:26,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835138328] [2021-12-21 15:17:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:26,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:26,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835138328] [2021-12-21 15:17:26,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835138328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:26,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:26,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:17:26,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267593005] [2021-12-21 15:17:26,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:26,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:17:26,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:17:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:17:26,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2021-12-21 15:17:26,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:26,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2021-12-21 15:17:26,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:26,599 INFO L129 PetriNetUnfolder]: 14/224 cut-off events. [2021-12-21 15:17:26,599 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-21 15:17:26,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2021-12-21 15:17:26,604 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2021-12-21 15:17:26,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2021-12-21 15:17:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:17:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:17:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2021-12-21 15:17:26,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2021-12-21 15:17:26,626 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2021-12-21 15:17:26,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2021-12-21 15:17:26,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:26,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2021-12-21 15:17:26,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,643 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,645 INFO L186 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2021-12-21 15:17:26,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2021-12-21 15:17:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:26,654 INFO L242 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2021-12-21 15:17:26,656 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2021-12-21 15:17:26,659 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2021-12-21 15:17:26,660 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2021-12-21 15:17:26,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:26,661 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] [2021-12-21 15:17:26,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:17:26,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:26,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1845329235, now seen corresponding path program 1 times [2021-12-21 15:17:26,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:26,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610128640] [2021-12-21 15:17:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:26,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:26,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:26,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610128640] [2021-12-21 15:17:26,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610128640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:26,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:26,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:17:26,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559635214] [2021-12-21 15:17:26,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:26,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:17:26,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:17:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:17:26,827 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-12-21 15:17:26,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:26,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-12-21 15:17:26,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:26,882 INFO L129 PetriNetUnfolder]: 26/304 cut-off events. [2021-12-21 15:17:26,883 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-21 15:17:26,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 304 events. 26/304 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 685 event pairs, 1 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 333. Up to 14 conditions per place. [2021-12-21 15:17:26,885 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2021-12-21 15:17:26,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2021-12-21 15:17:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:17:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:17:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2021-12-21 15:17:26,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2021-12-21 15:17:26,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2021-12-21 15:17:26,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2021-12-21 15:17:26,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:26,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2021-12-21 15:17:26,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,895 INFO L186 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2021-12-21 15:17:26,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2021-12-21 15:17:26,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:26,905 INFO L242 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2021-12-21 15:17:26,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2021-12-21 15:17:26,906 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2021-12-21 15:17:26,906 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2021-12-21 15:17:26,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:26,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:26,907 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] [2021-12-21 15:17:26,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:17:26,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash -523798231, now seen corresponding path program 1 times [2021-12-21 15:17:26,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:26,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537001876] [2021-12-21 15:17:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:26,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537001876] [2021-12-21 15:17:27,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537001876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:17:27,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45241480] [2021-12-21 15:17:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:17:27,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:17:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:17:27,017 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-21 15:17:27,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-21 15:17:27,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:27,109 INFO L129 PetriNetUnfolder]: 53/486 cut-off events. [2021-12-21 15:17:27,109 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-12-21 15:17:27,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 486 events. 53/486 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1855 event pairs, 17 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 579. Up to 57 conditions per place. [2021-12-21 15:17:27,113 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2021-12-21 15:17:27,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 222 transitions, 501 flow [2021-12-21 15:17:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:17:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:17:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-12-21 15:17:27,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-12-21 15:17:27,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-12-21 15:17:27,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-12-21 15:17:27,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:27,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-12-21 15:17:27,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,123 INFO L186 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 677 transitions. [2021-12-21 15:17:27,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 222 transitions, 501 flow [2021-12-21 15:17:27,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:27,127 INFO L242 Difference]: Finished difference. Result has 212 places, 219 transitions, 462 flow [2021-12-21 15:17:27,127 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=212, PETRI_TRANSITIONS=219} [2021-12-21 15:17:27,129 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -5 predicate places. [2021-12-21 15:17:27,129 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 462 flow [2021-12-21 15:17:27,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:27,130 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] [2021-12-21 15:17:27,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:17:27,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -837697581, now seen corresponding path program 2 times [2021-12-21 15:17:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:27,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427259657] [2021-12-21 15:17:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:27,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427259657] [2021-12-21 15:17:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427259657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:17:27,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134499243] [2021-12-21 15:17:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:17:27,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:17:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:17:27,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-21 15:17:27,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 219 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-21 15:17:27,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:27,305 INFO L129 PetriNetUnfolder]: 47/435 cut-off events. [2021-12-21 15:17:27,305 INFO L130 PetriNetUnfolder]: For 41/42 co-relation queries the response was YES. [2021-12-21 15:17:27,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 435 events. 47/435 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1417 event pairs, 14 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 521. Up to 45 conditions per place. [2021-12-21 15:17:27,308 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-12-21 15:17:27,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 525 flow [2021-12-21 15:17:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:17:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:17:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-12-21 15:17:27,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-12-21 15:17:27,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-12-21 15:17:27,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-12-21 15:17:27,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:27,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-12-21 15:17:27,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,318 INFO L186 Difference]: Start difference. First operand has 212 places, 219 transitions, 462 flow. Second operand 3 states and 677 transitions. [2021-12-21 15:17:27,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 525 flow [2021-12-21 15:17:27,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 224 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:27,323 INFO L242 Difference]: Finished difference. Result has 215 places, 221 transitions, 484 flow [2021-12-21 15:17:27,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=215, PETRI_TRANSITIONS=221} [2021-12-21 15:17:27,325 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -2 predicate places. [2021-12-21 15:17:27,325 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 221 transitions, 484 flow [2021-12-21 15:17:27,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:27,326 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] [2021-12-21 15:17:27,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:17:27,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash 345914545, now seen corresponding path program 1 times [2021-12-21 15:17:27,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:27,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464711684] [2021-12-21 15:17:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:27,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464711684] [2021-12-21 15:17:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464711684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:17:27,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235730696] [2021-12-21 15:17:27,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:17:27,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:17:27,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:17:27,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-12-21 15:17:27,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 221 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-12-21 15:17:27,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:27,471 INFO L129 PetriNetUnfolder]: 29/404 cut-off events. [2021-12-21 15:17:27,471 INFO L130 PetriNetUnfolder]: For 30/38 co-relation queries the response was YES. [2021-12-21 15:17:27,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 404 events. 29/404 cut-off events. For 30/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1292 event pairs, 2 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 467. Up to 26 conditions per place. [2021-12-21 15:17:27,473 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-12-21 15:17:27,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 224 transitions, 514 flow [2021-12-21 15:17:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:17:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:17:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2021-12-21 15:17:27,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2021-12-21 15:17:27,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2021-12-21 15:17:27,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2021-12-21 15:17:27,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:27,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2021-12-21 15:17:27,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,481 INFO L186 Difference]: Start difference. First operand has 215 places, 221 transitions, 484 flow. Second operand 3 states and 690 transitions. [2021-12-21 15:17:27,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 224 transitions, 514 flow [2021-12-21 15:17:27,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 508 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:27,489 INFO L242 Difference]: Finished difference. Result has 217 places, 221 transitions, 486 flow [2021-12-21 15:17:27,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=486, PETRI_PLACES=217, PETRI_TRANSITIONS=221} [2021-12-21 15:17:27,493 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2021-12-21 15:17:27,494 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 486 flow [2021-12-21 15:17:27,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:27,495 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, 1] [2021-12-21 15:17:27,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:17:27,495 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash -118142017, now seen corresponding path program 1 times [2021-12-21 15:17:27,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484073730] [2021-12-21 15:17:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:27,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484073730] [2021-12-21 15:17:27,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484073730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:17:27,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462524640] [2021-12-21 15:17:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:17:27,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:17:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:17:27,553 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-21 15:17:27,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 221 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-21 15:17:27,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:27,658 INFO L129 PetriNetUnfolder]: 41/577 cut-off events. [2021-12-21 15:17:27,658 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-12-21 15:17:27,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 577 events. 41/577 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 8 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 697. Up to 23 conditions per place. [2021-12-21 15:17:27,661 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/231 dead transitions. [2021-12-21 15:17:27,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 231 transitions, 576 flow [2021-12-21 15:17:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:17:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:17:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-12-21 15:17:27,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-12-21 15:17:27,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-12-21 15:17:27,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-12-21 15:17:27,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:27,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-12-21 15:17:27,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,670 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,671 INFO L186 Difference]: Start difference. First operand has 217 places, 221 transitions, 486 flow. Second operand 4 states and 902 transitions. [2021-12-21 15:17:27,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 231 transitions, 576 flow [2021-12-21 15:17:27,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 231 transitions, 572 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:27,675 INFO L242 Difference]: Finished difference. Result has 220 places, 223 transitions, 508 flow [2021-12-21 15:17:27,676 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=508, PETRI_PLACES=220, PETRI_TRANSITIONS=223} [2021-12-21 15:17:27,677 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 3 predicate places. [2021-12-21 15:17:27,677 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 223 transitions, 508 flow [2021-12-21 15:17:27,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:27,678 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, 1] [2021-12-21 15:17:27,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:17:27,678 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash 577100317, now seen corresponding path program 2 times [2021-12-21 15:17:27,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:27,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085774977] [2021-12-21 15:17:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:27,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085774977] [2021-12-21 15:17:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085774977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:17:27,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20108291] [2021-12-21 15:17:27,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:17:27,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:17:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:17:27,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-21 15:17:27,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 223 transitions, 508 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-21 15:17:27,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:27,829 INFO L129 PetriNetUnfolder]: 38/581 cut-off events. [2021-12-21 15:17:27,829 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-12-21 15:17:27,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 581 events. 38/581 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2401 event pairs, 8 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 713. Up to 23 conditions per place. [2021-12-21 15:17:27,833 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 28 selfloop transitions, 4 changer transitions 0/233 dead transitions. [2021-12-21 15:17:27,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 233 transitions, 606 flow [2021-12-21 15:17:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:17:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:17:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-12-21 15:17:27,835 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-12-21 15:17:27,836 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-12-21 15:17:27,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-12-21 15:17:27,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:27,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-12-21 15:17:27,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,841 INFO L186 Difference]: Start difference. First operand has 220 places, 223 transitions, 508 flow. Second operand 4 states and 902 transitions. [2021-12-21 15:17:27,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 233 transitions, 606 flow [2021-12-21 15:17:27,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 233 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:27,846 INFO L242 Difference]: Finished difference. Result has 224 places, 225 transitions, 536 flow [2021-12-21 15:17:27,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=224, PETRI_TRANSITIONS=225} [2021-12-21 15:17:27,847 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 7 predicate places. [2021-12-21 15:17:27,847 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 225 transitions, 536 flow [2021-12-21 15:17:27,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:27,848 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, 1] [2021-12-21 15:17:27,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:17:27,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1246874527, now seen corresponding path program 1 times [2021-12-21 15:17:27,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:27,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674046285] [2021-12-21 15:17:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:27,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:27,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674046285] [2021-12-21 15:17:27,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674046285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:27,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:27,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:27,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243810616] [2021-12-21 15:17:27,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:27,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:27,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:27,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:27,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 225 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:27,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:27,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:27,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:28,303 INFO L129 PetriNetUnfolder]: 72/669 cut-off events. [2021-12-21 15:17:28,304 INFO L130 PetriNetUnfolder]: For 66/79 co-relation queries the response was YES. [2021-12-21 15:17:28,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 669 events. 72/669 cut-off events. For 66/79 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3275 event pairs, 27 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 988. Up to 185 conditions per place. [2021-12-21 15:17:28,307 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 3 changer transitions 22/271 dead transitions. [2021-12-21 15:17:28,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 271 transitions, 821 flow [2021-12-21 15:17:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:17:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:17:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2446 transitions. [2021-12-21 15:17:28,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7648530331457161 [2021-12-21 15:17:28,314 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2446 transitions. [2021-12-21 15:17:28,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2446 transitions. [2021-12-21 15:17:28,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:28,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2446 transitions. [2021-12-21 15:17:28,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,327 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,328 INFO L186 Difference]: Start difference. First operand has 224 places, 225 transitions, 536 flow. Second operand 13 states and 2446 transitions. [2021-12-21 15:17:28,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 271 transitions, 821 flow [2021-12-21 15:17:28,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 271 transitions, 815 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-21 15:17:28,334 INFO L242 Difference]: Finished difference. Result has 246 places, 227 transitions, 573 flow [2021-12-21 15:17:28,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=573, PETRI_PLACES=246, PETRI_TRANSITIONS=227} [2021-12-21 15:17:28,335 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-21 15:17:28,335 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 227 transitions, 573 flow [2021-12-21 15:17:28,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:28,336 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, 1] [2021-12-21 15:17:28,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:17:28,336 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1587805225, now seen corresponding path program 1 times [2021-12-21 15:17:28,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:28,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815846571] [2021-12-21 15:17:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:28,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:28,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815846571] [2021-12-21 15:17:28,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815846571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:28,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:28,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:28,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022266081] [2021-12-21 15:17:28,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:28,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:28,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:28,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:28,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 227 transitions, 573 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:28,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:28,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:28,692 INFO L129 PetriNetUnfolder]: 73/665 cut-off events. [2021-12-21 15:17:28,693 INFO L130 PetriNetUnfolder]: For 225/244 co-relation queries the response was YES. [2021-12-21 15:17:28,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 665 events. 73/665 cut-off events. For 225/244 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3238 event pairs, 31 based on Foata normal form. 1/636 useless extension candidates. Maximal degree in co-relation 1154. Up to 211 conditions per place. [2021-12-21 15:17:28,698 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 8 changer transitions 12/252 dead transitions. [2021-12-21 15:17:28,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 252 transitions, 850 flow [2021-12-21 15:17:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:17:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:17:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2021-12-21 15:17:28,703 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7623798965262379 [2021-12-21 15:17:28,703 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2021-12-21 15:17:28,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2021-12-21 15:17:28,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:28,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2021-12-21 15:17:28,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,715 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,715 INFO L186 Difference]: Start difference. First operand has 246 places, 227 transitions, 573 flow. Second operand 11 states and 2063 transitions. [2021-12-21 15:17:28,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 252 transitions, 850 flow [2021-12-21 15:17:28,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 252 transitions, 809 flow, removed 20 selfloop flow, removed 7 redundant places. [2021-12-21 15:17:28,723 INFO L242 Difference]: Finished difference. Result has 249 places, 234 transitions, 637 flow [2021-12-21 15:17:28,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=637, PETRI_PLACES=249, PETRI_TRANSITIONS=234} [2021-12-21 15:17:28,724 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-12-21 15:17:28,724 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 234 transitions, 637 flow [2021-12-21 15:17:28,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:28,726 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, 1] [2021-12-21 15:17:28,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:17:28,727 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:28,727 INFO L85 PathProgramCache]: Analyzing trace with hash 358324959, now seen corresponding path program 2 times [2021-12-21 15:17:28,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:28,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596772446] [2021-12-21 15:17:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:28,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:28,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596772446] [2021-12-21 15:17:28,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596772446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:28,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:28,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:28,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421646291] [2021-12-21 15:17:28,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:28,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:28,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:28,892 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:28,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 234 transitions, 637 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:28,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:28,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:28,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:29,124 INFO L129 PetriNetUnfolder]: 71/667 cut-off events. [2021-12-21 15:17:29,124 INFO L130 PetriNetUnfolder]: For 302/325 co-relation queries the response was YES. [2021-12-21 15:17:29,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 667 events. 71/667 cut-off events. For 302/325 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3294 event pairs, 27 based on Foata normal form. 1/638 useless extension candidates. Maximal degree in co-relation 1221. Up to 183 conditions per place. [2021-12-21 15:17:29,130 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 17/274 dead transitions. [2021-12-21 15:17:29,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 274 transitions, 1039 flow [2021-12-21 15:17:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:17:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:17:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2440 transitions. [2021-12-21 15:17:29,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7629768605378362 [2021-12-21 15:17:29,137 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2440 transitions. [2021-12-21 15:17:29,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2440 transitions. [2021-12-21 15:17:29,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:29,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2440 transitions. [2021-12-21 15:17:29,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.69230769230768) internal successors, (2440), 13 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,151 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,151 INFO L186 Difference]: Start difference. First operand has 249 places, 234 transitions, 637 flow. Second operand 13 states and 2440 transitions. [2021-12-21 15:17:29,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 274 transitions, 1039 flow [2021-12-21 15:17:29,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 274 transitions, 963 flow, removed 38 selfloop flow, removed 5 redundant places. [2021-12-21 15:17:29,160 INFO L242 Difference]: Finished difference. Result has 261 places, 235 transitions, 660 flow [2021-12-21 15:17:29,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=660, PETRI_PLACES=261, PETRI_TRANSITIONS=235} [2021-12-21 15:17:29,162 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 44 predicate places. [2021-12-21 15:17:29,162 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 235 transitions, 660 flow [2021-12-21 15:17:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:29,163 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, 1] [2021-12-21 15:17:29,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 15:17:29,163 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash -689111047, now seen corresponding path program 3 times [2021-12-21 15:17:29,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:29,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363934055] [2021-12-21 15:17:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:29,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:29,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363934055] [2021-12-21 15:17:29,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363934055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:29,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:29,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:29,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676039534] [2021-12-21 15:17:29,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:29,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:29,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:29,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:29,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 235 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:29,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:29,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:29,512 INFO L129 PetriNetUnfolder]: 70/677 cut-off events. [2021-12-21 15:17:29,512 INFO L130 PetriNetUnfolder]: For 413/432 co-relation queries the response was YES. [2021-12-21 15:17:29,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 677 events. 70/677 cut-off events. For 413/432 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3401 event pairs, 24 based on Foata normal form. 1/653 useless extension candidates. Maximal degree in co-relation 1274. Up to 182 conditions per place. [2021-12-21 15:17:29,518 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 18/275 dead transitions. [2021-12-21 15:17:29,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 275 transitions, 1078 flow [2021-12-21 15:17:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:17:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:17:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2442 transitions. [2021-12-21 15:17:29,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7636022514071295 [2021-12-21 15:17:29,524 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2442 transitions. [2021-12-21 15:17:29,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2442 transitions. [2021-12-21 15:17:29,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:29,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2442 transitions. [2021-12-21 15:17:29,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.84615384615384) internal successors, (2442), 13 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,537 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,537 INFO L186 Difference]: Start difference. First operand has 261 places, 235 transitions, 660 flow. Second operand 13 states and 2442 transitions. [2021-12-21 15:17:29,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 275 transitions, 1078 flow [2021-12-21 15:17:29,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 275 transitions, 1044 flow, removed 15 selfloop flow, removed 8 redundant places. [2021-12-21 15:17:29,545 INFO L242 Difference]: Finished difference. Result has 266 places, 235 transitions, 681 flow [2021-12-21 15:17:29,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=681, PETRI_PLACES=266, PETRI_TRANSITIONS=235} [2021-12-21 15:17:29,546 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-12-21 15:17:29,547 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 235 transitions, 681 flow [2021-12-21 15:17:29,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:29,548 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, 1] [2021-12-21 15:17:29,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 15:17:29,548 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash 347393457, now seen corresponding path program 4 times [2021-12-21 15:17:29,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:29,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813226181] [2021-12-21 15:17:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:29,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:29,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:29,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813226181] [2021-12-21 15:17:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813226181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:29,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:29,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:29,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995449415] [2021-12-21 15:17:29,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:29,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:29,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:29,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:29,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:29,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:29,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 235 transitions, 681 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:29,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:29,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:29,920 INFO L129 PetriNetUnfolder]: 65/669 cut-off events. [2021-12-21 15:17:29,921 INFO L130 PetriNetUnfolder]: For 576/603 co-relation queries the response was YES. [2021-12-21 15:17:29,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1333 conditions, 669 events. 65/669 cut-off events. For 576/603 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3361 event pairs, 27 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 1300. Up to 216 conditions per place. [2021-12-21 15:17:29,925 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 10 changer transitions 11/255 dead transitions. [2021-12-21 15:17:29,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 255 transitions, 1023 flow [2021-12-21 15:17:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:17:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:17:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2061 transitions. [2021-12-21 15:17:29,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.761640798226164 [2021-12-21 15:17:29,931 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2061 transitions. [2021-12-21 15:17:29,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2061 transitions. [2021-12-21 15:17:29,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:29,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2061 transitions. [2021-12-21 15:17:29,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,941 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,941 INFO L186 Difference]: Start difference. First operand has 266 places, 235 transitions, 681 flow. Second operand 11 states and 2061 transitions. [2021-12-21 15:17:29,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 255 transitions, 1023 flow [2021-12-21 15:17:29,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 255 transitions, 938 flow, removed 29 selfloop flow, removed 11 redundant places. [2021-12-21 15:17:29,949 INFO L242 Difference]: Finished difference. Result has 265 places, 241 transitions, 757 flow [2021-12-21 15:17:29,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=757, PETRI_PLACES=265, PETRI_TRANSITIONS=241} [2021-12-21 15:17:29,951 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 48 predicate places. [2021-12-21 15:17:29,951 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 241 transitions, 757 flow [2021-12-21 15:17:29,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:29,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:29,952 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, 1] [2021-12-21 15:17:29,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 15:17:29,952 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 935319555, now seen corresponding path program 5 times [2021-12-21 15:17:29,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:29,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811929605] [2021-12-21 15:17:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:29,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:30,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:30,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811929605] [2021-12-21 15:17:30,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811929605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:30,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:30,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:30,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360189530] [2021-12-21 15:17:30,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:30,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:30,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:30,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:30,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:30,095 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:30,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 241 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:30,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:30,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:30,317 INFO L129 PetriNetUnfolder]: 61/659 cut-off events. [2021-12-21 15:17:30,317 INFO L130 PetriNetUnfolder]: For 471/506 co-relation queries the response was YES. [2021-12-21 15:17:30,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 659 events. 61/659 cut-off events. For 471/506 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3265 event pairs, 25 based on Foata normal form. 3/636 useless extension candidates. Maximal degree in co-relation 1237. Up to 207 conditions per place. [2021-12-21 15:17:30,321 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 3 changer transitions 20/255 dead transitions. [2021-12-21 15:17:30,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 255 transitions, 1011 flow [2021-12-21 15:17:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:17:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:17:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2242 transitions. [2021-12-21 15:17:30,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7594850948509485 [2021-12-21 15:17:30,327 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2242 transitions. [2021-12-21 15:17:30,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2242 transitions. [2021-12-21 15:17:30,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:30,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2242 transitions. [2021-12-21 15:17:30,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.83333333333334) internal successors, (2242), 12 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,338 INFO L186 Difference]: Start difference. First operand has 265 places, 241 transitions, 757 flow. Second operand 12 states and 2242 transitions. [2021-12-21 15:17:30,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 255 transitions, 1011 flow [2021-12-21 15:17:30,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 255 transitions, 962 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-12-21 15:17:30,346 INFO L242 Difference]: Finished difference. Result has 272 places, 234 transitions, 673 flow [2021-12-21 15:17:30,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=272, PETRI_TRANSITIONS=234} [2021-12-21 15:17:30,347 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 55 predicate places. [2021-12-21 15:17:30,347 INFO L470 AbstractCegarLoop]: Abstraction has has 272 places, 234 transitions, 673 flow [2021-12-21 15:17:30,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:30,348 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, 1] [2021-12-21 15:17:30,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 15:17:30,348 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash -21318611, now seen corresponding path program 6 times [2021-12-21 15:17:30,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976403521] [2021-12-21 15:17:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:30,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:30,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:30,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976403521] [2021-12-21 15:17:30,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976403521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:30,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:30,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:30,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992693603] [2021-12-21 15:17:30,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:30,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:30,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:30,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:30,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 234 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:30,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:30,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:30,644 INFO L129 PetriNetUnfolder]: 54/592 cut-off events. [2021-12-21 15:17:30,644 INFO L130 PetriNetUnfolder]: For 304/323 co-relation queries the response was YES. [2021-12-21 15:17:30,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 592 events. 54/592 cut-off events. For 304/323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2698 event pairs, 24 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 1029. Up to 176 conditions per place. [2021-12-21 15:17:30,649 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 45 selfloop transitions, 2 changer transitions 21/244 dead transitions. [2021-12-21 15:17:30,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 244 transitions, 859 flow [2021-12-21 15:17:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:17:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:17:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2238 transitions. [2021-12-21 15:17:30,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.758130081300813 [2021-12-21 15:17:30,656 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2238 transitions. [2021-12-21 15:17:30,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2238 transitions. [2021-12-21 15:17:30,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:30,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2238 transitions. [2021-12-21 15:17:30,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.5) internal successors, (2238), 12 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,666 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,666 INFO L186 Difference]: Start difference. First operand has 272 places, 234 transitions, 673 flow. Second operand 12 states and 2238 transitions. [2021-12-21 15:17:30,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 244 transitions, 859 flow [2021-12-21 15:17:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 244 transitions, 789 flow, removed 19 selfloop flow, removed 18 redundant places. [2021-12-21 15:17:30,674 INFO L242 Difference]: Finished difference. Result has 257 places, 223 transitions, 561 flow [2021-12-21 15:17:30,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=561, PETRI_PLACES=257, PETRI_TRANSITIONS=223} [2021-12-21 15:17:30,675 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-12-21 15:17:30,675 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 223 transitions, 561 flow [2021-12-21 15:17:30,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,675 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:30,676 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, 1] [2021-12-21 15:17:30,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 15:17:30,676 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:30,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1394329801, now seen corresponding path program 2 times [2021-12-21 15:17:30,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241366728] [2021-12-21 15:17:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:30,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:30,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:30,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241366728] [2021-12-21 15:17:30,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241366728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:30,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:30,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:30,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557903146] [2021-12-21 15:17:30,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:30,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:30,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:30,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:30,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 223 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:30,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:30,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:30,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:30,989 INFO L129 PetriNetUnfolder]: 57/598 cut-off events. [2021-12-21 15:17:30,989 INFO L130 PetriNetUnfolder]: For 161/174 co-relation queries the response was YES. [2021-12-21 15:17:30,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 598 events. 57/598 cut-off events. For 161/174 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2704 event pairs, 19 based on Foata normal form. 1/575 useless extension candidates. Maximal degree in co-relation 976. Up to 164 conditions per place. [2021-12-21 15:17:30,993 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 8 changer transitions 16/250 dead transitions. [2021-12-21 15:17:30,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 250 transitions, 816 flow [2021-12-21 15:17:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:17:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:17:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2021-12-21 15:17:30,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7634885439763488 [2021-12-21 15:17:30,997 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2021-12-21 15:17:30,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2021-12-21 15:17:30,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:30,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2021-12-21 15:17:31,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,006 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,007 INFO L186 Difference]: Start difference. First operand has 257 places, 223 transitions, 561 flow. Second operand 11 states and 2066 transitions. [2021-12-21 15:17:31,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 250 transitions, 816 flow [2021-12-21 15:17:31,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 250 transitions, 768 flow, removed 17 selfloop flow, removed 12 redundant places. [2021-12-21 15:17:31,013 INFO L242 Difference]: Finished difference. Result has 247 places, 229 transitions, 598 flow [2021-12-21 15:17:31,014 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=598, PETRI_PLACES=247, PETRI_TRANSITIONS=229} [2021-12-21 15:17:31,014 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-12-21 15:17:31,014 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 229 transitions, 598 flow [2021-12-21 15:17:31,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:31,015 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, 1] [2021-12-21 15:17:31,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 15:17:31,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1125693919, now seen corresponding path program 3 times [2021-12-21 15:17:31,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:31,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388531845] [2021-12-21 15:17:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:31,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:31,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388531845] [2021-12-21 15:17:31,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388531845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:31,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:31,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:31,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001000247] [2021-12-21 15:17:31,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:31,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:31,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:31,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:31,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:31,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 229 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:31,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:31,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:31,293 INFO L129 PetriNetUnfolder]: 55/596 cut-off events. [2021-12-21 15:17:31,294 INFO L130 PetriNetUnfolder]: For 200/219 co-relation queries the response was YES. [2021-12-21 15:17:31,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 596 events. 55/596 cut-off events. For 200/219 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2720 event pairs, 15 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 1018. Up to 136 conditions per place. [2021-12-21 15:17:31,298 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 6 changer transitions 23/272 dead transitions. [2021-12-21 15:17:31,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 272 transitions, 978 flow [2021-12-21 15:17:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:17:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:17:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2443 transitions. [2021-12-21 15:17:31,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7639149468417761 [2021-12-21 15:17:31,302 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2443 transitions. [2021-12-21 15:17:31,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2443 transitions. [2021-12-21 15:17:31,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:31,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2443 transitions. [2021-12-21 15:17:31,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.92307692307693) internal successors, (2443), 13 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,316 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,316 INFO L186 Difference]: Start difference. First operand has 247 places, 229 transitions, 598 flow. Second operand 13 states and 2443 transitions. [2021-12-21 15:17:31,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 272 transitions, 978 flow [2021-12-21 15:17:31,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 272 transitions, 928 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-12-21 15:17:31,323 INFO L242 Difference]: Finished difference. Result has 257 places, 229 transitions, 614 flow [2021-12-21 15:17:31,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=614, PETRI_PLACES=257, PETRI_TRANSITIONS=229} [2021-12-21 15:17:31,324 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-12-21 15:17:31,326 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 229 transitions, 614 flow [2021-12-21 15:17:31,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:31,327 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, 1] [2021-12-21 15:17:31,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 15:17:31,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash 827031345, now seen corresponding path program 4 times [2021-12-21 15:17:31,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:31,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660763258] [2021-12-21 15:17:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:31,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:31,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660763258] [2021-12-21 15:17:31,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660763258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:31,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:31,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:31,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587592318] [2021-12-21 15:17:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:31,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:31,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:31,456 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:31,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 229 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:31,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:31,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:31,658 INFO L129 PetriNetUnfolder]: 52/601 cut-off events. [2021-12-21 15:17:31,659 INFO L130 PetriNetUnfolder]: For 293/307 co-relation queries the response was YES. [2021-12-21 15:17:31,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 601 events. 52/601 cut-off events. For 293/307 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2779 event pairs, 13 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 1033. Up to 162 conditions per place. [2021-12-21 15:17:31,663 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 10 changer transitions 16/255 dead transitions. [2021-12-21 15:17:31,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 255 transitions, 933 flow [2021-12-21 15:17:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:17:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:17:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2245 transitions. [2021-12-21 15:17:31,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7605013550135501 [2021-12-21 15:17:31,669 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2245 transitions. [2021-12-21 15:17:31,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2245 transitions. [2021-12-21 15:17:31,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:31,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2245 transitions. [2021-12-21 15:17:31,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.08333333333334) internal successors, (2245), 12 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,677 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,677 INFO L186 Difference]: Start difference. First operand has 257 places, 229 transitions, 614 flow. Second operand 12 states and 2245 transitions. [2021-12-21 15:17:31,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 255 transitions, 933 flow [2021-12-21 15:17:31,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 255 transitions, 868 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-21 15:17:31,683 INFO L242 Difference]: Finished difference. Result has 256 places, 235 transitions, 676 flow [2021-12-21 15:17:31,684 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=676, PETRI_PLACES=256, PETRI_TRANSITIONS=235} [2021-12-21 15:17:31,684 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 39 predicate places. [2021-12-21 15:17:31,684 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 235 transitions, 676 flow [2021-12-21 15:17:31,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:31,685 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, 1] [2021-12-21 15:17:31,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 15:17:31,686 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1264722911, now seen corresponding path program 5 times [2021-12-21 15:17:31,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:31,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262758274] [2021-12-21 15:17:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:31,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:31,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:31,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262758274] [2021-12-21 15:17:31,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262758274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:31,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:31,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:31,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790763061] [2021-12-21 15:17:31,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:31,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:31,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:31,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:31,796 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:31,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 235 transitions, 676 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:31,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:31,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:31,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:32,001 INFO L129 PetriNetUnfolder]: 47/584 cut-off events. [2021-12-21 15:17:32,001 INFO L130 PetriNetUnfolder]: For 274/309 co-relation queries the response was YES. [2021-12-21 15:17:32,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 584 events. 47/584 cut-off events. For 274/309 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2663 event pairs, 13 based on Foata normal form. 3/565 useless extension candidates. Maximal degree in co-relation 1001. Up to 162 conditions per place. [2021-12-21 15:17:32,004 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 3 changer transitions 22/251 dead transitions. [2021-12-21 15:17:32,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 251 transitions, 912 flow [2021-12-21 15:17:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:17:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:17:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2060 transitions. [2021-12-21 15:17:32,008 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7612712490761271 [2021-12-21 15:17:32,008 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2060 transitions. [2021-12-21 15:17:32,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2060 transitions. [2021-12-21 15:17:32,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:32,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2060 transitions. [2021-12-21 15:17:32,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.27272727272728) internal successors, (2060), 11 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,017 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,017 INFO L186 Difference]: Start difference. First operand has 256 places, 235 transitions, 676 flow. Second operand 11 states and 2060 transitions. [2021-12-21 15:17:32,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 251 transitions, 912 flow [2021-12-21 15:17:32,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 251 transitions, 892 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-12-21 15:17:32,023 INFO L242 Difference]: Finished difference. Result has 262 places, 228 transitions, 613 flow [2021-12-21 15:17:32,025 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=613, PETRI_PLACES=262, PETRI_TRANSITIONS=228} [2021-12-21 15:17:32,025 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 45 predicate places. [2021-12-21 15:17:32,025 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 228 transitions, 613 flow [2021-12-21 15:17:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:32,026 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, 1] [2021-12-21 15:17:32,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 15:17:32,026 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1872094995, now seen corresponding path program 6 times [2021-12-21 15:17:32,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698194261] [2021-12-21 15:17:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:32,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:32,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698194261] [2021-12-21 15:17:32,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698194261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:32,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:32,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:17:32,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670977618] [2021-12-21 15:17:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:32,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:17:32,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:32,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:17:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:17:32,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-21 15:17:32,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 228 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:32,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-21 15:17:32,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:32,285 INFO L129 PetriNetUnfolder]: 41/520 cut-off events. [2021-12-21 15:17:32,285 INFO L130 PetriNetUnfolder]: For 184/194 co-relation queries the response was YES. [2021-12-21 15:17:32,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 520 events. 41/520 cut-off events. For 184/194 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2086 event pairs, 12 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 830. Up to 129 conditions per place. [2021-12-21 15:17:32,289 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 38 selfloop transitions, 0 changer transitions 37/242 dead transitions. [2021-12-21 15:17:32,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 242 transitions, 809 flow [2021-12-21 15:17:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:17:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:17:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2239 transitions. [2021-12-21 15:17:32,292 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7584688346883469 [2021-12-21 15:17:32,292 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2239 transitions. [2021-12-21 15:17:32,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2239 transitions. [2021-12-21 15:17:32,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:32,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2239 transitions. [2021-12-21 15:17:32,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.58333333333334) internal successors, (2239), 12 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,301 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,301 INFO L186 Difference]: Start difference. First operand has 262 places, 228 transitions, 613 flow. Second operand 12 states and 2239 transitions. [2021-12-21 15:17:32,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 242 transitions, 809 flow [2021-12-21 15:17:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 242 transitions, 739 flow, removed 17 selfloop flow, removed 17 redundant places. [2021-12-21 15:17:32,307 INFO L242 Difference]: Finished difference. Result has 248 places, 205 transitions, 442 flow [2021-12-21 15:17:32,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=248, PETRI_TRANSITIONS=205} [2021-12-21 15:17:32,308 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-12-21 15:17:32,308 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 205 transitions, 442 flow [2021-12-21 15:17:32,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:32,309 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, 1] [2021-12-21 15:17:32,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 15:17:32,310 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1215411841, now seen corresponding path program 1 times [2021-12-21 15:17:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:32,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237570215] [2021-12-21 15:17:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:32,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:32,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237570215] [2021-12-21 15:17:32,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237570215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:32,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:32,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-21 15:17:32,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106727862] [2021-12-21 15:17:32,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:32,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 15:17:32,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 15:17:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-21 15:17:32,694 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-21 15:17:32,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 205 transitions, 442 flow. Second operand has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:32,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-21 15:17:32,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:34,183 INFO L129 PetriNetUnfolder]: 197/1694 cut-off events. [2021-12-21 15:17:34,184 INFO L130 PetriNetUnfolder]: For 84/87 co-relation queries the response was YES. [2021-12-21 15:17:34,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1694 events. 197/1694 cut-off events. For 84/87 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12170 event pairs, 38 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 2470. Up to 127 conditions per place. [2021-12-21 15:17:34,192 INFO L132 encePairwiseOnDemand]: 217/246 looper letters, 152 selfloop transitions, 37 changer transitions 13/341 dead transitions. [2021-12-21 15:17:34,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 341 transitions, 1158 flow [2021-12-21 15:17:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 15:17:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-21 15:17:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4655 transitions. [2021-12-21 15:17:34,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6758130081300813 [2021-12-21 15:17:34,202 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4655 transitions. [2021-12-21 15:17:34,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4655 transitions. [2021-12-21 15:17:34,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:34,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4655 transitions. [2021-12-21 15:17:34,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.25) internal successors, (4655), 28 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,219 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,219 INFO L186 Difference]: Start difference. First operand has 248 places, 205 transitions, 442 flow. Second operand 28 states and 4655 transitions. [2021-12-21 15:17:34,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 341 transitions, 1158 flow [2021-12-21 15:17:34,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 341 transitions, 1124 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:34,226 INFO L242 Difference]: Finished difference. Result has 251 places, 230 transitions, 641 flow [2021-12-21 15:17:34,226 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=641, PETRI_PLACES=251, PETRI_TRANSITIONS=230} [2021-12-21 15:17:34,227 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 34 predicate places. [2021-12-21 15:17:34,227 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 230 transitions, 641 flow [2021-12-21 15:17:34,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:34,228 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:34,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 15:17:34,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1289123226, now seen corresponding path program 1 times [2021-12-21 15:17:34,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:34,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638323077] [2021-12-21 15:17:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:34,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:34,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:34,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638323077] [2021-12-21 15:17:34,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638323077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:34,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095646899] [2021-12-21 15:17:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:34,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:34,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:34,439 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) [2021-12-21 15:17:34,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:17:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 15:17:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:35,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:35,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095646899] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:35,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:17:35,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-12-21 15:17:35,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962489655] [2021-12-21 15:17:35,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:35,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 15:17:35,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 15:17:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-21 15:17:35,824 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-21 15:17:35,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 230 transitions, 641 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:35,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-21 15:17:35,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:36,481 INFO L129 PetriNetUnfolder]: 206/1858 cut-off events. [2021-12-21 15:17:36,482 INFO L130 PetriNetUnfolder]: For 659/667 co-relation queries the response was YES. [2021-12-21 15:17:36,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 1858 events. 206/1858 cut-off events. For 659/667 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 13938 event pairs, 81 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 3076. Up to 224 conditions per place. [2021-12-21 15:17:36,496 INFO L132 encePairwiseOnDemand]: 226/246 looper letters, 145 selfloop transitions, 22 changer transitions 7/313 dead transitions. [2021-12-21 15:17:36,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 313 transitions, 1238 flow [2021-12-21 15:17:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:17:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:17:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3341 transitions. [2021-12-21 15:17:36,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790650406504065 [2021-12-21 15:17:36,502 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3341 transitions. [2021-12-21 15:17:36,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3341 transitions. [2021-12-21 15:17:36,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:36,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3341 transitions. [2021-12-21 15:17:36,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.05) internal successors, (3341), 20 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,514 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,514 INFO L186 Difference]: Start difference. First operand has 251 places, 230 transitions, 641 flow. Second operand 20 states and 3341 transitions. [2021-12-21 15:17:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 313 transitions, 1238 flow [2021-12-21 15:17:36,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 313 transitions, 1206 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-12-21 15:17:36,523 INFO L242 Difference]: Finished difference. Result has 266 places, 236 transitions, 725 flow [2021-12-21 15:17:36,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=266, PETRI_TRANSITIONS=236} [2021-12-21 15:17:36,523 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-12-21 15:17:36,524 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 236 transitions, 725 flow [2021-12-21 15:17:36,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:36,525 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:36,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:36,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-21 15:17:36,752 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1113965941, now seen corresponding path program 1 times [2021-12-21 15:17:36,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:36,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118030673] [2021-12-21 15:17:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:36,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:36,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118030673] [2021-12-21 15:17:36,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118030673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43329614] [2021-12-21 15:17:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:36,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:36,953 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) [2021-12-21 15:17:36,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:17:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 15:17:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:37,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:38,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43329614] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:38,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:17:38,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-12-21 15:17:38,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616677613] [2021-12-21 15:17:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:38,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 15:17:38,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 15:17:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-21 15:17:38,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-21 15:17:38,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 236 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:38,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-21 15:17:38,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:38,794 INFO L129 PetriNetUnfolder]: 269/2431 cut-off events. [2021-12-21 15:17:38,794 INFO L130 PetriNetUnfolder]: For 1270/1288 co-relation queries the response was YES. [2021-12-21 15:17:38,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4217 conditions, 2431 events. 269/2431 cut-off events. For 1270/1288 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 20066 event pairs, 111 based on Foata normal form. 6/2242 useless extension candidates. Maximal degree in co-relation 4182. Up to 410 conditions per place. [2021-12-21 15:17:38,817 INFO L132 encePairwiseOnDemand]: 229/246 looper letters, 152 selfloop transitions, 23 changer transitions 11/325 dead transitions. [2021-12-21 15:17:38,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 325 transitions, 1399 flow [2021-12-21 15:17:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:17:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:17:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2021-12-21 15:17:38,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2021-12-21 15:17:38,822 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2021-12-21 15:17:38,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2021-12-21 15:17:38,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:38,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2021-12-21 15:17:38,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,836 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,837 INFO L186 Difference]: Start difference. First operand has 266 places, 236 transitions, 725 flow. Second operand 18 states and 3027 transitions. [2021-12-21 15:17:38,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 325 transitions, 1399 flow [2021-12-21 15:17:38,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 325 transitions, 1338 flow, removed 20 selfloop flow, removed 11 redundant places. [2021-12-21 15:17:38,849 INFO L242 Difference]: Finished difference. Result has 276 places, 240 transitions, 791 flow [2021-12-21 15:17:38,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=791, PETRI_PLACES=276, PETRI_TRANSITIONS=240} [2021-12-21 15:17:38,851 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-12-21 15:17:38,852 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 240 transitions, 791 flow [2021-12-21 15:17:38,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:38,853 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:38,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:39,068 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,SelfDestructingSolverStorable21 [2021-12-21 15:17:39,068 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash -447164831, now seen corresponding path program 2 times [2021-12-21 15:17:39,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132068761] [2021-12-21 15:17:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:39,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:39,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:39,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132068761] [2021-12-21 15:17:39,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132068761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:39,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731844062] [2021-12-21 15:17:39,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:17:39,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:39,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:39,247 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) [2021-12-21 15:17:39,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:17:39,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 15:17:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:17:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 15:17:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:39,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:17:39,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731844062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:39,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:17:39,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2021-12-21 15:17:39,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450966384] [2021-12-21 15:17:39,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:39,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 15:17:39,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 15:17:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-12-21 15:17:39,948 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2021-12-21 15:17:39,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 240 transitions, 791 flow. Second operand has 14 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:39,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2021-12-21 15:17:39,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:40,795 INFO L129 PetriNetUnfolder]: 248/2642 cut-off events. [2021-12-21 15:17:40,795 INFO L130 PetriNetUnfolder]: For 1574/1620 co-relation queries the response was YES. [2021-12-21 15:17:40,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4677 conditions, 2642 events. 248/2642 cut-off events. For 1574/1620 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22506 event pairs, 101 based on Foata normal form. 22/2483 useless extension candidates. Maximal degree in co-relation 4637. Up to 447 conditions per place. [2021-12-21 15:17:40,813 INFO L132 encePairwiseOnDemand]: 224/246 looper letters, 62 selfloop transitions, 25 changer transitions 18/276 dead transitions. [2021-12-21 15:17:40,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 276 transitions, 1135 flow [2021-12-21 15:17:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:17:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:17:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3266 transitions. [2021-12-21 15:17:40,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7375790424570913 [2021-12-21 15:17:40,819 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3266 transitions. [2021-12-21 15:17:40,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3266 transitions. [2021-12-21 15:17:40,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:40,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3266 transitions. [2021-12-21 15:17:40,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.44444444444446) internal successors, (3266), 18 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,829 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,829 INFO L186 Difference]: Start difference. First operand has 276 places, 240 transitions, 791 flow. Second operand 18 states and 3266 transitions. [2021-12-21 15:17:40,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 276 transitions, 1135 flow [2021-12-21 15:17:40,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 276 transitions, 1082 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-12-21 15:17:40,842 INFO L242 Difference]: Finished difference. Result has 287 places, 246 transitions, 846 flow [2021-12-21 15:17:40,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=846, PETRI_PLACES=287, PETRI_TRANSITIONS=246} [2021-12-21 15:17:40,843 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 70 predicate places. [2021-12-21 15:17:40,843 INFO L470 AbstractCegarLoop]: Abstraction has has 287 places, 246 transitions, 846 flow [2021-12-21 15:17:40,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:40,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:40,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:41,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:41,072 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1421333978, now seen corresponding path program 1 times [2021-12-21 15:17:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411636954] [2021-12-21 15:17:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:41,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:41,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:41,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411636954] [2021-12-21 15:17:41,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411636954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:41,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:41,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:17:41,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509185168] [2021-12-21 15:17:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:41,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:17:41,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:41,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:17:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:17:41,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-21 15:17:41,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 246 transitions, 846 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:41,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-21 15:17:41,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:41,427 INFO L129 PetriNetUnfolder]: 211/1604 cut-off events. [2021-12-21 15:17:41,427 INFO L130 PetriNetUnfolder]: For 2114/2150 co-relation queries the response was YES. [2021-12-21 15:17:41,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3068 conditions, 1604 events. 211/1604 cut-off events. For 2114/2150 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 11194 event pairs, 116 based on Foata normal form. 2/1467 useless extension candidates. Maximal degree in co-relation 3026. Up to 321 conditions per place. [2021-12-21 15:17:41,437 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 73 selfloop transitions, 12 changer transitions 4/263 dead transitions. [2021-12-21 15:17:41,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 263 transitions, 1095 flow [2021-12-21 15:17:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:17:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:17:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2021-12-21 15:17:41,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-12-21 15:17:41,440 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2021-12-21 15:17:41,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2021-12-21 15:17:41,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:41,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2021-12-21 15:17:41,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,446 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,447 INFO L186 Difference]: Start difference. First operand has 287 places, 246 transitions, 846 flow. Second operand 10 states and 1985 transitions. [2021-12-21 15:17:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 263 transitions, 1095 flow [2021-12-21 15:17:41,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 263 transitions, 1078 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-21 15:17:41,459 INFO L242 Difference]: Finished difference. Result has 277 places, 242 transitions, 837 flow [2021-12-21 15:17:41,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=837, PETRI_PLACES=277, PETRI_TRANSITIONS=242} [2021-12-21 15:17:41,460 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 60 predicate places. [2021-12-21 15:17:41,460 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 242 transitions, 837 flow [2021-12-21 15:17:41,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:41,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:41,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 15:17:41,461 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 30097720, now seen corresponding path program 1 times [2021-12-21 15:17:41,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347454744] [2021-12-21 15:17:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:41,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:41,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347454744] [2021-12-21 15:17:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347454744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:41,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:41,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:17:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460494404] [2021-12-21 15:17:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:41,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:17:41,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:17:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:17:41,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-21 15:17:41,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 242 transitions, 837 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:41,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-21 15:17:41,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:41,776 INFO L129 PetriNetUnfolder]: 272/1644 cut-off events. [2021-12-21 15:17:41,777 INFO L130 PetriNetUnfolder]: For 1810/1834 co-relation queries the response was YES. [2021-12-21 15:17:41,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3063 conditions, 1644 events. 272/1644 cut-off events. For 1810/1834 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 10978 event pairs, 139 based on Foata normal form. 8/1515 useless extension candidates. Maximal degree in co-relation 3026. Up to 430 conditions per place. [2021-12-21 15:17:41,790 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 34/257 dead transitions. [2021-12-21 15:17:41,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 257 transitions, 1056 flow [2021-12-21 15:17:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:17:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:17:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1983 transitions. [2021-12-21 15:17:41,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8060975609756098 [2021-12-21 15:17:41,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1983 transitions. [2021-12-21 15:17:41,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1983 transitions. [2021-12-21 15:17:41,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:41,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1983 transitions. [2021-12-21 15:17:41,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,799 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,799 INFO L186 Difference]: Start difference. First operand has 277 places, 242 transitions, 837 flow. Second operand 10 states and 1983 transitions. [2021-12-21 15:17:41,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 257 transitions, 1056 flow [2021-12-21 15:17:41,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 257 transitions, 1031 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-12-21 15:17:41,809 INFO L242 Difference]: Finished difference. Result has 279 places, 221 transitions, 687 flow [2021-12-21 15:17:41,809 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=687, PETRI_PLACES=279, PETRI_TRANSITIONS=221} [2021-12-21 15:17:41,810 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 62 predicate places. [2021-12-21 15:17:41,810 INFO L470 AbstractCegarLoop]: Abstraction has has 279 places, 221 transitions, 687 flow [2021-12-21 15:17:41,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:41,811 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:41,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 15:17:41,811 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 697557398, now seen corresponding path program 1 times [2021-12-21 15:17:41,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:41,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864289092] [2021-12-21 15:17:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:41,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:41,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864289092] [2021-12-21 15:17:41,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864289092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:41,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391909197] [2021-12-21 15:17:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:41,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:41,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:41,956 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) [2021-12-21 15:17:41,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:17:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 15:17:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:42,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:43,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391909197] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:43,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:17:43,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-12-21 15:17:43,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889482810] [2021-12-21 15:17:43,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:43,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:17:43,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:43,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:17:43,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-12-21 15:17:43,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-12-21 15:17:43,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 221 transitions, 687 flow. Second operand has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:43,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-12-21 15:17:43,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:43,516 INFO L129 PetriNetUnfolder]: 251/1472 cut-off events. [2021-12-21 15:17:43,516 INFO L130 PetriNetUnfolder]: For 1264/1275 co-relation queries the response was YES. [2021-12-21 15:17:43,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2683 conditions, 1472 events. 251/1472 cut-off events. For 1264/1275 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 9700 event pairs, 51 based on Foata normal form. 9/1375 useless extension candidates. Maximal degree in co-relation 2645. Up to 147 conditions per place. [2021-12-21 15:17:43,566 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 70 selfloop transitions, 15 changer transitions 0/253 dead transitions. [2021-12-21 15:17:43,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 253 transitions, 1012 flow [2021-12-21 15:17:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:17:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:17:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2725 transitions. [2021-12-21 15:17:43,570 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7912311265969802 [2021-12-21 15:17:43,571 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2725 transitions. [2021-12-21 15:17:43,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2725 transitions. [2021-12-21 15:17:43,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:43,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2725 transitions. [2021-12-21 15:17:43,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.64285714285714) internal successors, (2725), 14 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,578 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,578 INFO L186 Difference]: Start difference. First operand has 279 places, 221 transitions, 687 flow. Second operand 14 states and 2725 transitions. [2021-12-21 15:17:43,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 253 transitions, 1012 flow [2021-12-21 15:17:43,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 253 transitions, 902 flow, removed 30 selfloop flow, removed 25 redundant places. [2021-12-21 15:17:43,587 INFO L242 Difference]: Finished difference. Result has 249 places, 225 transitions, 658 flow [2021-12-21 15:17:43,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=658, PETRI_PLACES=249, PETRI_TRANSITIONS=225} [2021-12-21 15:17:43,588 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-12-21 15:17:43,588 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 225 transitions, 658 flow [2021-12-21 15:17:43,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:43,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:43,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:43,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 15:17:43,812 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1221617672, now seen corresponding path program 1 times [2021-12-21 15:17:43,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237999106] [2021-12-21 15:17:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:43,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:43,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237999106] [2021-12-21 15:17:43,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237999106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:43,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:43,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:17:43,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264965927] [2021-12-21 15:17:43,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:43,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:17:43,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:17:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:17:43,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-21 15:17:43,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 225 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:43,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:43,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-21 15:17:43,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:44,075 INFO L129 PetriNetUnfolder]: 161/986 cut-off events. [2021-12-21 15:17:44,075 INFO L130 PetriNetUnfolder]: For 544/546 co-relation queries the response was YES. [2021-12-21 15:17:44,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 986 events. 161/986 cut-off events. For 544/546 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5225 event pairs, 68 based on Foata normal form. 10/901 useless extension candidates. Maximal degree in co-relation 1739. Up to 225 conditions per place. [2021-12-21 15:17:44,081 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 56 selfloop transitions, 8 changer transitions 6/240 dead transitions. [2021-12-21 15:17:44,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 240 transitions, 863 flow [2021-12-21 15:17:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:17:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:17:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2021-12-21 15:17:44,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2021-12-21 15:17:44,084 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2021-12-21 15:17:44,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2021-12-21 15:17:44,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:44,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2021-12-21 15:17:44,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,088 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,088 INFO L186 Difference]: Start difference. First operand has 249 places, 225 transitions, 658 flow. Second operand 8 states and 1591 transitions. [2021-12-21 15:17:44,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 240 transitions, 863 flow [2021-12-21 15:17:44,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 240 transitions, 841 flow, removed 1 selfloop flow, removed 9 redundant places. [2021-12-21 15:17:44,094 INFO L242 Difference]: Finished difference. Result has 247 places, 222 transitions, 636 flow [2021-12-21 15:17:44,095 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=247, PETRI_TRANSITIONS=222} [2021-12-21 15:17:44,095 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-12-21 15:17:44,095 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 222 transitions, 636 flow [2021-12-21 15:17:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:44,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:44,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 15:17:44,096 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1694137708, now seen corresponding path program 1 times [2021-12-21 15:17:44,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:44,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719390040] [2021-12-21 15:17:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:44,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:44,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:44,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719390040] [2021-12-21 15:17:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719390040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:44,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:44,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:17:44,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717116419] [2021-12-21 15:17:44,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:44,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:17:44,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:17:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:17:44,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-21 15:17:44,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 222 transitions, 636 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:44,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-21 15:17:44,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:44,304 INFO L129 PetriNetUnfolder]: 105/710 cut-off events. [2021-12-21 15:17:44,305 INFO L130 PetriNetUnfolder]: For 500/536 co-relation queries the response was YES. [2021-12-21 15:17:44,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 710 events. 105/710 cut-off events. For 500/536 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3142 event pairs, 56 based on Foata normal form. 22/671 useless extension candidates. Maximal degree in co-relation 1298. Up to 179 conditions per place. [2021-12-21 15:17:44,309 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 11/233 dead transitions. [2021-12-21 15:17:44,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 233 transitions, 801 flow [2021-12-21 15:17:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:17:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:17:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1586 transitions. [2021-12-21 15:17:44,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8058943089430894 [2021-12-21 15:17:44,312 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1586 transitions. [2021-12-21 15:17:44,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1586 transitions. [2021-12-21 15:17:44,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:44,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1586 transitions. [2021-12-21 15:17:44,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.25) internal successors, (1586), 8 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,317 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,317 INFO L186 Difference]: Start difference. First operand has 247 places, 222 transitions, 636 flow. Second operand 8 states and 1586 transitions. [2021-12-21 15:17:44,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 233 transitions, 801 flow [2021-12-21 15:17:44,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 233 transitions, 782 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-21 15:17:44,323 INFO L242 Difference]: Finished difference. Result has 249 places, 220 transitions, 620 flow [2021-12-21 15:17:44,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=620, PETRI_PLACES=249, PETRI_TRANSITIONS=220} [2021-12-21 15:17:44,323 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-12-21 15:17:44,324 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 220 transitions, 620 flow [2021-12-21 15:17:44,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:44,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:44,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:44,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 15:17:44,325 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1143977843, now seen corresponding path program 1 times [2021-12-21 15:17:44,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:44,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647766500] [2021-12-21 15:17:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:44,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:44,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647766500] [2021-12-21 15:17:44,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647766500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114299310] [2021-12-21 15:17:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:44,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:44,475 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) [2021-12-21 15:17:44,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:17:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:44,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 15:17:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:45,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:45,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114299310] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:45,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:17:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-12-21 15:17:45,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043358290] [2021-12-21 15:17:45,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:45,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:17:45,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:17:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-12-21 15:17:45,588 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-12-21 15:17:45,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 220 transitions, 620 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:45,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-12-21 15:17:45,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:45,849 INFO L129 PetriNetUnfolder]: 98/661 cut-off events. [2021-12-21 15:17:45,850 INFO L130 PetriNetUnfolder]: For 374/403 co-relation queries the response was YES. [2021-12-21 15:17:45,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 661 events. 98/661 cut-off events. For 374/403 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2952 event pairs, 19 based on Foata normal form. 30/650 useless extension candidates. Maximal degree in co-relation 1197. Up to 115 conditions per place. [2021-12-21 15:17:45,854 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 49 selfloop transitions, 13 changer transitions 0/230 dead transitions. [2021-12-21 15:17:45,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 230 transitions, 794 flow [2021-12-21 15:17:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:17:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:17:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2513 transitions. [2021-12-21 15:17:45,857 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7858036272670419 [2021-12-21 15:17:45,857 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2513 transitions. [2021-12-21 15:17:45,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2513 transitions. [2021-12-21 15:17:45,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:45,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2513 transitions. [2021-12-21 15:17:45,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.30769230769232) internal successors, (2513), 13 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,863 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,863 INFO L186 Difference]: Start difference. First operand has 249 places, 220 transitions, 620 flow. Second operand 13 states and 2513 transitions. [2021-12-21 15:17:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 230 transitions, 794 flow [2021-12-21 15:17:45,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 230 transitions, 765 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-12-21 15:17:45,869 INFO L242 Difference]: Finished difference. Result has 249 places, 221 transitions, 635 flow [2021-12-21 15:17:45,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=635, PETRI_PLACES=249, PETRI_TRANSITIONS=221} [2021-12-21 15:17:45,869 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-12-21 15:17:45,869 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 221 transitions, 635 flow [2021-12-21 15:17:45,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:45,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:45,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:45,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:46,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 15:17:46,084 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -480570606, now seen corresponding path program 1 times [2021-12-21 15:17:46,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:46,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836497686] [2021-12-21 15:17:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:46,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:17:46,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836497686] [2021-12-21 15:17:46,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836497686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087481001] [2021-12-21 15:17:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:46,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:46,492 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) [2021-12-21 15:17:46,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:17:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 15:17:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:17:47,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:17:48,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087481001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:17:48,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:17:48,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2021-12-21 15:17:48,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524796069] [2021-12-21 15:17:48,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:17:48,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-21 15:17:48,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-21 15:17:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2021-12-21 15:17:48,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2021-12-21 15:17:48,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 221 transitions, 635 flow. Second operand has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:48,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:48,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2021-12-21 15:17:48,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:50,973 INFO L129 PetriNetUnfolder]: 477/2899 cut-off events. [2021-12-21 15:17:50,973 INFO L130 PetriNetUnfolder]: For 1324/1447 co-relation queries the response was YES. [2021-12-21 15:17:50,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5530 conditions, 2899 events. 477/2899 cut-off events. For 1324/1447 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 24737 event pairs, 200 based on Foata normal form. 123/2841 useless extension candidates. Maximal degree in co-relation 5504. Up to 317 conditions per place. [2021-12-21 15:17:50,988 INFO L132 encePairwiseOnDemand]: 222/246 looper letters, 255 selfloop transitions, 41 changer transitions 29/455 dead transitions. [2021-12-21 15:17:50,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 455 transitions, 2145 flow [2021-12-21 15:17:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 15:17:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-21 15:17:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5680 transitions. [2021-12-21 15:17:50,994 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413730803974707 [2021-12-21 15:17:50,994 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5680 transitions. [2021-12-21 15:17:50,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5680 transitions. [2021-12-21 15:17:50,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:50,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5680 transitions. [2021-12-21 15:17:51,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 157.77777777777777) internal successors, (5680), 36 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,010 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,011 INFO L186 Difference]: Start difference. First operand has 249 places, 221 transitions, 635 flow. Second operand 36 states and 5680 transitions. [2021-12-21 15:17:51,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 455 transitions, 2145 flow [2021-12-21 15:17:51,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 455 transitions, 2109 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-12-21 15:17:51,023 INFO L242 Difference]: Finished difference. Result has 289 places, 248 transitions, 897 flow [2021-12-21 15:17:51,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=897, PETRI_PLACES=289, PETRI_TRANSITIONS=248} [2021-12-21 15:17:51,024 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 72 predicate places. [2021-12-21 15:17:51,024 INFO L470 AbstractCegarLoop]: Abstraction has has 289 places, 248 transitions, 897 flow [2021-12-21 15:17:51,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,025 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:51,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:51,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:51,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:51,250 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -522977964, now seen corresponding path program 1 times [2021-12-21 15:17:51,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:51,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200581573] [2021-12-21 15:17:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:51,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:17:51,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:51,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200581573] [2021-12-21 15:17:51,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200581573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:51,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:51,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-21 15:17:51,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271790774] [2021-12-21 15:17:51,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 15:17:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 15:17:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-12-21 15:17:51,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-12-21 15:17:51,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 248 transitions, 897 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:51,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:51,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-12-21 15:17:51,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:55,221 INFO L129 PetriNetUnfolder]: 8583/23995 cut-off events. [2021-12-21 15:17:55,223 INFO L130 PetriNetUnfolder]: For 12235/12394 co-relation queries the response was YES. [2021-12-21 15:17:55,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47583 conditions, 23995 events. 8583/23995 cut-off events. For 12235/12394 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 274881 event pairs, 4413 based on Foata normal form. 12/22578 useless extension candidates. Maximal degree in co-relation 47541. Up to 5546 conditions per place. [2021-12-21 15:17:55,629 INFO L132 encePairwiseOnDemand]: 217/246 looper letters, 204 selfloop transitions, 42 changer transitions 0/424 dead transitions. [2021-12-21 15:17:55,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 424 transitions, 1964 flow [2021-12-21 15:17:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:17:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:17:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3814 transitions. [2021-12-21 15:17:55,649 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7382888114595432 [2021-12-21 15:17:55,649 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3814 transitions. [2021-12-21 15:17:55,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3814 transitions. [2021-12-21 15:17:55,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:55,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3814 transitions. [2021-12-21 15:17:55,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.61904761904762) internal successors, (3814), 21 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 246.0) internal successors, (5412), 22 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,665 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 246.0) internal successors, (5412), 22 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,665 INFO L186 Difference]: Start difference. First operand has 289 places, 248 transitions, 897 flow. Second operand 21 states and 3814 transitions. [2021-12-21 15:17:55,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 424 transitions, 1964 flow [2021-12-21 15:17:55,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 424 transitions, 1925 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-21 15:17:55,754 INFO L242 Difference]: Finished difference. Result has 303 places, 274 transitions, 1124 flow [2021-12-21 15:17:55,755 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1124, PETRI_PLACES=303, PETRI_TRANSITIONS=274} [2021-12-21 15:17:55,755 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 86 predicate places. [2021-12-21 15:17:55,755 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 274 transitions, 1124 flow [2021-12-21 15:17:55,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:55,756 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:55,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:17:55,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 15:17:55,757 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2086119924, now seen corresponding path program 2 times [2021-12-21 15:17:55,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:55,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519480726] [2021-12-21 15:17:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:55,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:17:56,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:56,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519480726] [2021-12-21 15:17:56,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519480726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:56,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542979091] [2021-12-21 15:17:56,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:17:56,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:56,148 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) [2021-12-21 15:17:56,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:17:56,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:17:56,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:17:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 15:17:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:56,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-21 15:17:56,659 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 11 treesize of output 7 [2021-12-21 15:17:56,899 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:17:56,899 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 11 treesize of output 11 [2021-12-21 15:17:56,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-21 15:17:57,171 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 [2021-12-21 15:17:57,221 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 [2021-12-21 15:17:57,633 INFO L353 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-21 15:17:57,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 23 [2021-12-21 15:17:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:57,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:17:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542979091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:17:58,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:17:58,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 12] total 55 [2021-12-21 15:17:58,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733312130] [2021-12-21 15:17:58,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:17:58,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-21 15:17:58,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-21 15:17:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 15:17:58,290 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 246 [2021-12-21 15:17:58,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 274 transitions, 1124 flow. Second operand has 55 states, 55 states have (on average 150.27272727272728) internal successors, (8265), 55 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:58,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:58,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 246 [2021-12-21 15:17:58,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:18:08,131 INFO L129 PetriNetUnfolder]: 17559/46042 cut-off events. [2021-12-21 15:18:08,131 INFO L130 PetriNetUnfolder]: For 36439/36654 co-relation queries the response was YES. [2021-12-21 15:18:08,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104086 conditions, 46042 events. 17559/46042 cut-off events. For 36439/36654 co-relation queries the response was YES. Maximal size of possible extension queue 1578. Compared 559916 event pairs, 769 based on Foata normal form. 130/44555 useless extension candidates. Maximal degree in co-relation 104039. Up to 11011 conditions per place. [2021-12-21 15:18:08,640 INFO L132 encePairwiseOnDemand]: 206/246 looper letters, 387 selfloop transitions, 132 changer transitions 0/659 dead transitions. [2021-12-21 15:18:08,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 659 transitions, 3712 flow [2021-12-21 15:18:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-21 15:18:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-21 15:18:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 7912 transitions. [2021-12-21 15:18:08,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6306392475689463 [2021-12-21 15:18:08,653 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 7912 transitions. [2021-12-21 15:18:08,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 7912 transitions. [2021-12-21 15:18:08,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:18:08,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 7912 transitions. [2021-12-21 15:18:08,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 155.13725490196077) internal successors, (7912), 51 states have internal predecessors, (7912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:08,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 246.0) internal successors, (12792), 52 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:08,681 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 246.0) internal successors, (12792), 52 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:08,681 INFO L186 Difference]: Start difference. First operand has 303 places, 274 transitions, 1124 flow. Second operand 51 states and 7912 transitions. [2021-12-21 15:18:08,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 659 transitions, 3712 flow [2021-12-21 15:18:09,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 659 transitions, 3685 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-21 15:18:09,114 INFO L242 Difference]: Finished difference. Result has 374 places, 364 transitions, 2173 flow [2021-12-21 15:18:09,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2173, PETRI_PLACES=374, PETRI_TRANSITIONS=364} [2021-12-21 15:18:09,114 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 157 predicate places. [2021-12-21 15:18:09,114 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 364 transitions, 2173 flow [2021-12-21 15:18:09,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 150.27272727272728) internal successors, (8265), 55 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:09,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:18:09,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:18:09,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:18:09,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:09,317 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:18:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:18:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1957805380, now seen corresponding path program 1 times [2021-12-21 15:18:09,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:18:09,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054189031] [2021-12-21 15:18:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:09,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:18:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:09,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:18:09,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054189031] [2021-12-21 15:18:09,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054189031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:18:09,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715041967] [2021-12-21 15:18:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:18:09,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:18:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:18:09,643 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) [2021-12-21 15:18:09,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:18:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:18:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 15:18:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:18:10,246 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 15:18:10,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 10 [2021-12-21 15:18:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:10,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:18:10,581 INFO L353 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2021-12-21 15:18:10,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2021-12-21 15:18:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:18:10,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715041967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:18:10,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:18:10,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 9] total 35 [2021-12-21 15:18:10,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634322396] [2021-12-21 15:18:10,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:18:10,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 15:18:10,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:18:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 15:18:10,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 15:18:10,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-12-21 15:18:10,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 364 transitions, 2173 flow. Second operand has 35 states, 35 states have (on average 174.34285714285716) internal successors, (6102), 35 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:18:10,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:18:10,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-12-21 15:18:10,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand