./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-nzb-file-trans.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 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:27:02,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:27:02,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:27:02,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:27:02,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:27:02,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:27:02,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:27:02,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:27:02,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:27:02,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:27:02,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:27:02,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:27:02,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:27:02,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:27:02,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:27:02,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:27:02,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:27:02,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:27:02,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:27:02,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:27:02,952 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:27:02,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:27:02,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:27:02,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:27:02,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:27:02,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:27:02,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:27:02,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:27:02,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:27:02,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:27:02,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:27:02,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:27:02,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:27:02,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:27:02,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:27:02,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:27:02,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:27:02,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:27:02,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:27:02,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:27:02,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:27:02,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:27:02,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:27:03,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:27:03,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:27:03,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:27:03,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:27:03,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:27:03,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:27:03,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:27:03,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:27:03,011 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:27:03,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:27:03,012 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:27:03,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:27:03,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:27:03,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:27:03,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:27:03,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:27:03,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:27:03,014 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:27:03,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:27:03,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:27:03,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:27:03,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:27:03,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:27:03,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:27:03,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:27:03,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:27:03,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:27:03,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:27:03,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:27:03,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:27:03,016 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:27:03,017 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:27:03,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:27:03,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 [2022-07-19 21:27:03,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:27:03,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:27:03,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:27:03,274 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:27:03,275 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:27:03,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-07-19 21:27:03,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ec8bda1/ead2a6967add43999db28b0192439707/FLAG3b8f27f28 [2022-07-19 21:27:03,740 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:27:03,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-07-19 21:27:03,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ec8bda1/ead2a6967add43999db28b0192439707/FLAG3b8f27f28 [2022-07-19 21:27:03,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ec8bda1/ead2a6967add43999db28b0192439707 [2022-07-19 21:27:03,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:27:03,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:27:03,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:27:03,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:27:03,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:27:03,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:27:03" (1/1) ... [2022-07-19 21:27:03,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4259cd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:03, skipping insertion in model container [2022-07-19 21:27:03,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:27:03" (1/1) ... [2022-07-19 21:27:03,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:27:03,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:27:04,139 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-nzb-file-trans.wvr.c[6450,6463] [2022-07-19 21:27:04,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:27:04,170 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:27:04,211 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-nzb-file-trans.wvr.c[6450,6463] [2022-07-19 21:27:04,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:27:04,233 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:27:04,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04 WrapperNode [2022-07-19 21:27:04,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:27:04,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:27:04,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:27:04,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:27:04,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,301 INFO L137 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 646 [2022-07-19 21:27:04,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:27:04,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:27:04,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:27:04,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:27:04,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:27:04,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:27:04,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:27:04,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:27:04,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (1/1) ... [2022-07-19 21:27:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:27:04,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:04,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:27:04,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:27:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:27:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:27:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:27:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:27:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:27:04,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:27:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:27:04,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:27:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:27:04,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:27:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:27:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:27:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:27:04,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:27:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:27:04,484 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:27:04,633 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:27:04,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:27:05,470 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:27:05,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:27:05,488 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:27:05,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:27:05 BoogieIcfgContainer [2022-07-19 21:27:05,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:27:05,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:27:05,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:27:05,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:27:05,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:27:03" (1/3) ... [2022-07-19 21:27:05,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f7428f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:27:05, skipping insertion in model container [2022-07-19 21:27:05,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:04" (2/3) ... [2022-07-19 21:27:05,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f7428f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:27:05, skipping insertion in model container [2022-07-19 21:27:05,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:27:05" (3/3) ... [2022-07-19 21:27:05,498 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2022-07-19 21:27:05,503 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:27:05,512 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:27:05,512 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:27:05,512 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:27:05,661 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:27:05,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 770 places, 851 transitions, 1726 flow [2022-07-19 21:27:06,109 INFO L129 PetriNetUnfolder]: 91/848 cut-off events. [2022-07-19 21:27:06,109 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:27:06,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 848 events. 91/848 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3067 event pairs, 0 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 622. Up to 2 conditions per place. [2022-07-19 21:27:06,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 770 places, 851 transitions, 1726 flow [2022-07-19 21:27:06,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 756 places, 837 transitions, 1692 flow [2022-07-19 21:27:06,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:27:06,219 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d5c652b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49325c79 [2022-07-19 21:27:06,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:27:06,467 INFO L129 PetriNetUnfolder]: 89/826 cut-off events. [2022-07-19 21:27:06,468 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:27:06,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:06,469 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:06,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1800599683, now seen corresponding path program 1 times [2022-07-19 21:27:06,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:06,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348471170] [2022-07-19 21:27:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:06,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:06,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:06,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348471170] [2022-07-19 21:27:06,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348471170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:06,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:06,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:27:06,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275584202] [2022-07-19 21:27:06,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:27:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:27:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:27:06,871 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 807 out of 851 [2022-07-19 21:27:06,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 837 transitions, 1692 flow. Second operand has 2 states, 2 states have (on average 811.0) internal successors, (1622), 2 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:06,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:06,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 807 of 851 [2022-07-19 21:27:06,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:07,208 INFO L129 PetriNetUnfolder]: 54/800 cut-off events. [2022-07-19 21:27:07,208 INFO L130 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2022-07-19 21:27:07,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 800 events. 54/800 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2979 event pairs, 0 based on Foata normal form. 60/775 useless extension candidates. Maximal degree in co-relation 597. Up to 7 conditions per place. [2022-07-19 21:27:07,243 INFO L132 encePairwiseOnDemand]: 814/851 looper letters, 6 selfloop transitions, 0 changer transitions 7/800 dead transitions. [2022-07-19 21:27:07,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 800 transitions, 1630 flow [2022-07-19 21:27:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:27:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:27:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1657 transitions. [2022-07-19 21:27:07,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9735605170387779 [2022-07-19 21:27:07,266 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1657 transitions. [2022-07-19 21:27:07,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1657 transitions. [2022-07-19 21:27:07,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:07,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1657 transitions. [2022-07-19 21:27:07,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 828.5) internal successors, (1657), 2 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:07,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 851.0) internal successors, (2553), 3 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:07,296 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 851.0) internal successors, (2553), 3 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:07,298 INFO L186 Difference]: Start difference. First operand has 756 places, 837 transitions, 1692 flow. Second operand 2 states and 1657 transitions. [2022-07-19 21:27:07,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 800 transitions, 1630 flow [2022-07-19 21:27:07,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 800 transitions, 1618 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:27:07,347 INFO L242 Difference]: Finished difference. Result has 751 places, 793 transitions, 1592 flow [2022-07-19 21:27:07,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1592, PETRI_PLACES=751, PETRI_TRANSITIONS=793} [2022-07-19 21:27:07,355 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -5 predicate places. [2022-07-19 21:27:07,356 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 793 transitions, 1592 flow [2022-07-19 21:27:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 811.0) internal successors, (1622), 2 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:07,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:07,358 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:27:07,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1922282005, now seen corresponding path program 1 times [2022-07-19 21:27:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:07,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438792383] [2022-07-19 21:27:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:07,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:07,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:07,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438792383] [2022-07-19 21:27:07,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438792383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:07,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:07,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:07,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317677314] [2022-07-19 21:27:07,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:07,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:07,594 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-19 21:27:07,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 793 transitions, 1592 flow. Second operand has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:07,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:07,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-19 21:27:07,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:08,921 INFO L129 PetriNetUnfolder]: 395/3750 cut-off events. [2022-07-19 21:27:08,922 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:27:09,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4069 conditions, 3750 events. 395/3750 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 33479 event pairs, 96 based on Foata normal form. 0/3311 useless extension candidates. Maximal degree in co-relation 4066. Up to 184 conditions per place. [2022-07-19 21:27:09,031 INFO L132 encePairwiseOnDemand]: 847/851 looper letters, 33 selfloop transitions, 2 changer transitions 0/808 dead transitions. [2022-07-19 21:27:09,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 808 transitions, 1697 flow [2022-07-19 21:27:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-19 21:27:09,037 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-19 21:27:09,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-19 21:27:09,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-19 21:27:09,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:09,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-19 21:27:09,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:09,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:09,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:09,051 INFO L186 Difference]: Start difference. First operand has 751 places, 793 transitions, 1592 flow. Second operand 3 states and 2416 transitions. [2022-07-19 21:27:09,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 808 transitions, 1697 flow [2022-07-19 21:27:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 808 transitions, 1697 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:27:09,113 INFO L242 Difference]: Finished difference. Result has 748 places, 795 transitions, 1612 flow [2022-07-19 21:27:09,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1612, PETRI_PLACES=748, PETRI_TRANSITIONS=795} [2022-07-19 21:27:09,122 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -8 predicate places. [2022-07-19 21:27:09,123 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 795 transitions, 1612 flow [2022-07-19 21:27:09,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:09,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:09,125 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:27:09,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 88216851, now seen corresponding path program 2 times [2022-07-19 21:27:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:09,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867891698] [2022-07-19 21:27:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:09,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:09,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867891698] [2022-07-19 21:27:09,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867891698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:09,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:09,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167380701] [2022-07-19 21:27:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:09,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:09,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:09,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:09,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-19 21:27:09,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 795 transitions, 1612 flow. Second operand has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:09,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:09,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-19 21:27:09,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:10,413 INFO L129 PetriNetUnfolder]: 387/3844 cut-off events. [2022-07-19 21:27:10,413 INFO L130 PetriNetUnfolder]: For 104/111 co-relation queries the response was YES. [2022-07-19 21:27:10,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4245 conditions, 3844 events. 387/3844 cut-off events. For 104/111 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 34432 event pairs, 98 based on Foata normal form. 6/3459 useless extension candidates. Maximal degree in co-relation 4240. Up to 196 conditions per place. [2022-07-19 21:27:10,538 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 33 selfloop transitions, 4 changer transitions 0/810 dead transitions. [2022-07-19 21:27:10,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 810 transitions, 1725 flow [2022-07-19 21:27:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-19 21:27:10,545 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-19 21:27:10,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-19 21:27:10,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-19 21:27:10,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:10,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-19 21:27:10,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:10,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:10,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:10,560 INFO L186 Difference]: Start difference. First operand has 748 places, 795 transitions, 1612 flow. Second operand 3 states and 2416 transitions. [2022-07-19 21:27:10,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 810 transitions, 1725 flow [2022-07-19 21:27:10,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 810 transitions, 1723 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:10,577 INFO L242 Difference]: Finished difference. Result has 751 places, 797 transitions, 1642 flow [2022-07-19 21:27:10,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1642, PETRI_PLACES=751, PETRI_TRANSITIONS=797} [2022-07-19 21:27:10,581 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -5 predicate places. [2022-07-19 21:27:10,582 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 797 transitions, 1642 flow [2022-07-19 21:27:10,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:10,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:10,584 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:27:10,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1761177293, now seen corresponding path program 1 times [2022-07-19 21:27:10,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:10,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313279459] [2022-07-19 21:27:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313279459] [2022-07-19 21:27:10,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313279459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:10,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:10,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:10,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36313121] [2022-07-19 21:27:10,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:10,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:10,725 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-19 21:27:10,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 797 transitions, 1642 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:10,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:10,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-19 21:27:10,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:12,485 INFO L129 PetriNetUnfolder]: 789/6879 cut-off events. [2022-07-19 21:27:12,486 INFO L130 PetriNetUnfolder]: For 396/463 co-relation queries the response was YES. [2022-07-19 21:27:12,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 6879 events. 789/6879 cut-off events. For 396/463 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 71122 event pairs, 210 based on Foata normal form. 4/6060 useless extension candidates. Maximal degree in co-relation 7573. Up to 390 conditions per place. [2022-07-19 21:27:12,652 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 32 selfloop transitions, 5 changer transitions 0/812 dead transitions. [2022-07-19 21:27:12,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 812 transitions, 1757 flow [2022-07-19 21:27:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2415 transitions. [2022-07-19 21:27:12,728 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9459459459459459 [2022-07-19 21:27:12,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2415 transitions. [2022-07-19 21:27:12,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2415 transitions. [2022-07-19 21:27:12,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:12,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2415 transitions. [2022-07-19 21:27:12,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.0) internal successors, (2415), 3 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:12,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:12,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:12,747 INFO L186 Difference]: Start difference. First operand has 751 places, 797 transitions, 1642 flow. Second operand 3 states and 2415 transitions. [2022-07-19 21:27:12,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 812 transitions, 1757 flow [2022-07-19 21:27:12,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 812 transitions, 1745 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:27:12,765 INFO L242 Difference]: Finished difference. Result has 753 places, 800 transitions, 1675 flow [2022-07-19 21:27:12,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1675, PETRI_PLACES=753, PETRI_TRANSITIONS=800} [2022-07-19 21:27:12,770 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -3 predicate places. [2022-07-19 21:27:12,770 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 800 transitions, 1675 flow [2022-07-19 21:27:12,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:12,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:12,772 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:27:12,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1465338821, now seen corresponding path program 1 times [2022-07-19 21:27:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:12,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990129228] [2022-07-19 21:27:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990129228] [2022-07-19 21:27:12,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990129228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:12,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:12,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117554602] [2022-07-19 21:27:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:12,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:12,870 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-19 21:27:12,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 800 transitions, 1675 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:12,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:12,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-19 21:27:12,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:13,894 INFO L129 PetriNetUnfolder]: 292/3140 cut-off events. [2022-07-19 21:27:13,894 INFO L130 PetriNetUnfolder]: For 320/389 co-relation queries the response was YES. [2022-07-19 21:27:13,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3665 conditions, 3140 events. 292/3140 cut-off events. For 320/389 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28006 event pairs, 72 based on Foata normal form. 8/2876 useless extension candidates. Maximal degree in co-relation 3658. Up to 184 conditions per place. [2022-07-19 21:27:13,996 INFO L132 encePairwiseOnDemand]: 847/851 looper letters, 35 selfloop transitions, 4 changer transitions 0/816 dead transitions. [2022-07-19 21:27:13,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 816 transitions, 1800 flow [2022-07-19 21:27:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-19 21:27:14,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-19 21:27:14,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-19 21:27:14,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-19 21:27:14,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:14,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-19 21:27:14,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:14,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:14,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:14,031 INFO L186 Difference]: Start difference. First operand has 753 places, 800 transitions, 1675 flow. Second operand 3 states and 2416 transitions. [2022-07-19 21:27:14,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 816 transitions, 1800 flow [2022-07-19 21:27:14,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 816 transitions, 1788 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:27:14,047 INFO L242 Difference]: Finished difference. Result has 755 places, 803 transitions, 1707 flow [2022-07-19 21:27:14,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1707, PETRI_PLACES=755, PETRI_TRANSITIONS=803} [2022-07-19 21:27:14,051 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -1 predicate places. [2022-07-19 21:27:14,051 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 803 transitions, 1707 flow [2022-07-19 21:27:14,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:14,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:14,053 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:14,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:27:14,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1042716161, now seen corresponding path program 2 times [2022-07-19 21:27:14,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86293222] [2022-07-19 21:27:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:14,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86293222] [2022-07-19 21:27:14,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86293222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:14,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:14,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:14,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027967091] [2022-07-19 21:27:14,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:14,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:14,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:14,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:14,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-19 21:27:14,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 803 transitions, 1707 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:14,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:14,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-19 21:27:14,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:14,984 INFO L129 PetriNetUnfolder]: 269/3037 cut-off events. [2022-07-19 21:27:14,984 INFO L130 PetriNetUnfolder]: For 592/650 co-relation queries the response was YES. [2022-07-19 21:27:15,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3646 conditions, 3037 events. 269/3037 cut-off events. For 592/650 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 26944 event pairs, 80 based on Foata normal form. 8/2792 useless extension candidates. Maximal degree in co-relation 3638. Up to 201 conditions per place. [2022-07-19 21:27:15,093 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 37 selfloop transitions, 5 changer transitions 0/818 dead transitions. [2022-07-19 21:27:15,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 818 transitions, 1837 flow [2022-07-19 21:27:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-19 21:27:15,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-19 21:27:15,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-19 21:27:15,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-19 21:27:15,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:15,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-19 21:27:15,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:15,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:15,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:15,117 INFO L186 Difference]: Start difference. First operand has 755 places, 803 transitions, 1707 flow. Second operand 3 states and 2416 transitions. [2022-07-19 21:27:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 818 transitions, 1837 flow [2022-07-19 21:27:15,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 818 transitions, 1833 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:15,133 INFO L242 Difference]: Finished difference. Result has 758 places, 805 transitions, 1752 flow [2022-07-19 21:27:15,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1752, PETRI_PLACES=758, PETRI_TRANSITIONS=805} [2022-07-19 21:27:15,135 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 2 predicate places. [2022-07-19 21:27:15,135 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 805 transitions, 1752 flow [2022-07-19 21:27:15,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:15,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:15,137 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:15,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:27:15,137 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1621645087, now seen corresponding path program 2 times [2022-07-19 21:27:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:15,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926304541] [2022-07-19 21:27:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926304541] [2022-07-19 21:27:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926304541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:15,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:15,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289405784] [2022-07-19 21:27:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:15,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:15,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:15,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-19 21:27:15,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 805 transitions, 1752 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:15,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:15,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-19 21:27:15,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:16,593 INFO L129 PetriNetUnfolder]: 792/7438 cut-off events. [2022-07-19 21:27:16,593 INFO L130 PetriNetUnfolder]: For 835/927 co-relation queries the response was YES. [2022-07-19 21:27:16,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8401 conditions, 7438 events. 792/7438 cut-off events. For 835/927 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 78527 event pairs, 219 based on Foata normal form. 12/6646 useless extension candidates. Maximal degree in co-relation 8392. Up to 409 conditions per place. [2022-07-19 21:27:16,708 INFO L132 encePairwiseOnDemand]: 847/851 looper letters, 36 selfloop transitions, 4 changer transitions 0/817 dead transitions. [2022-07-19 21:27:16,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 817 transitions, 1864 flow [2022-07-19 21:27:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2415 transitions. [2022-07-19 21:27:16,714 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9459459459459459 [2022-07-19 21:27:16,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2415 transitions. [2022-07-19 21:27:16,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2415 transitions. [2022-07-19 21:27:16,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:16,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2415 transitions. [2022-07-19 21:27:16,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.0) internal successors, (2415), 3 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:16,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:16,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:16,728 INFO L186 Difference]: Start difference. First operand has 758 places, 805 transitions, 1752 flow. Second operand 3 states and 2415 transitions. [2022-07-19 21:27:16,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 817 transitions, 1864 flow [2022-07-19 21:27:16,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 817 transitions, 1848 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:27:16,744 INFO L242 Difference]: Finished difference. Result has 760 places, 805 transitions, 1768 flow [2022-07-19 21:27:16,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1768, PETRI_PLACES=760, PETRI_TRANSITIONS=805} [2022-07-19 21:27:16,746 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 4 predicate places. [2022-07-19 21:27:16,746 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 805 transitions, 1768 flow [2022-07-19 21:27:16,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:16,748 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:16,748 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:16,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:27:16,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1028007672, now seen corresponding path program 1 times [2022-07-19 21:27:16,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126238389] [2022-07-19 21:27:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126238389] [2022-07-19 21:27:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126238389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:16,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:27:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015642282] [2022-07-19 21:27:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:27:16,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:16,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:27:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:27:16,880 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 774 out of 851 [2022-07-19 21:27:16,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 805 transitions, 1768 flow. Second operand has 5 states, 5 states have (on average 779.4) internal successors, (3897), 5 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:16,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:16,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 774 of 851 [2022-07-19 21:27:16,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:17,224 INFO L129 PetriNetUnfolder]: 54/1036 cut-off events. [2022-07-19 21:27:17,225 INFO L130 PetriNetUnfolder]: For 136/174 co-relation queries the response was YES. [2022-07-19 21:27:17,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 1036 events. 54/1036 cut-off events. For 136/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5296 event pairs, 0 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 1190. Up to 55 conditions per place. [2022-07-19 21:27:17,258 INFO L132 encePairwiseOnDemand]: 836/851 looper letters, 39 selfloop transitions, 12 changer transitions 0/817 dead transitions. [2022-07-19 21:27:17,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 817 transitions, 1894 flow [2022-07-19 21:27:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:27:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:27:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3924 transitions. [2022-07-19 21:27:17,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9222091656874265 [2022-07-19 21:27:17,267 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3924 transitions. [2022-07-19 21:27:17,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3924 transitions. [2022-07-19 21:27:17,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:17,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3924 transitions. [2022-07-19 21:27:17,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 784.8) internal successors, (3924), 5 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:17,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 851.0) internal successors, (5106), 6 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:17,288 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 851.0) internal successors, (5106), 6 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:17,288 INFO L186 Difference]: Start difference. First operand has 760 places, 805 transitions, 1768 flow. Second operand 5 states and 3924 transitions. [2022-07-19 21:27:17,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 817 transitions, 1894 flow [2022-07-19 21:27:17,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 817 transitions, 1886 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:17,305 INFO L242 Difference]: Finished difference. Result has 764 places, 808 transitions, 1808 flow [2022-07-19 21:27:17,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1808, PETRI_PLACES=764, PETRI_TRANSITIONS=808} [2022-07-19 21:27:17,307 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 8 predicate places. [2022-07-19 21:27:17,307 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 808 transitions, 1808 flow [2022-07-19 21:27:17,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 779.4) internal successors, (3897), 5 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:17,309 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:17,309 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:17,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:27:17,310 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:17,310 INFO L85 PathProgramCache]: Analyzing trace with hash -152592993, now seen corresponding path program 1 times [2022-07-19 21:27:17,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275957945] [2022-07-19 21:27:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:27:17,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:17,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275957945] [2022-07-19 21:27:17,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275957945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:17,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705313102] [2022-07-19 21:27:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:17,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:17,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:17,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:17,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:27:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:27:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:27:17,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:27:17,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705313102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:17,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-19 21:27:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498676029] [2022-07-19 21:27:17,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:27:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:27:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:27:17,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 771 out of 851 [2022-07-19 21:27:17,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 808 transitions, 1808 flow. Second operand has 15 states, 15 states have (on average 775.0666666666667) internal successors, (11626), 15 states have internal predecessors, (11626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:17,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:17,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 771 of 851 [2022-07-19 21:27:17,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:18,475 INFO L129 PetriNetUnfolder]: 54/1060 cut-off events. [2022-07-19 21:27:18,476 INFO L130 PetriNetUnfolder]: For 127/164 co-relation queries the response was YES. [2022-07-19 21:27:18,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 1060 events. 54/1060 cut-off events. For 127/164 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5257 event pairs, 0 based on Foata normal form. 6/987 useless extension candidates. Maximal degree in co-relation 1260. Up to 46 conditions per place. [2022-07-19 21:27:18,507 INFO L132 encePairwiseOnDemand]: 827/851 looper letters, 42 selfloop transitions, 33 changer transitions 0/838 dead transitions. [2022-07-19 21:27:18,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 838 transitions, 2024 flow [2022-07-19 21:27:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:27:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:27:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 8562 transitions. [2022-07-19 21:27:18,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9146458711676103 [2022-07-19 21:27:18,524 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 8562 transitions. [2022-07-19 21:27:18,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 8562 transitions. [2022-07-19 21:27:18,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:18,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 8562 transitions. [2022-07-19 21:27:18,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 778.3636363636364) internal successors, (8562), 11 states have internal predecessors, (8562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:18,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 851.0) internal successors, (10212), 12 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:18,562 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 851.0) internal successors, (10212), 12 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:18,562 INFO L186 Difference]: Start difference. First operand has 764 places, 808 transitions, 1808 flow. Second operand 11 states and 8562 transitions. [2022-07-19 21:27:18,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 838 transitions, 2024 flow [2022-07-19 21:27:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 838 transitions, 2006 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:27:18,580 INFO L242 Difference]: Finished difference. Result has 774 places, 826 transitions, 1957 flow [2022-07-19 21:27:18,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1957, PETRI_PLACES=774, PETRI_TRANSITIONS=826} [2022-07-19 21:27:18,581 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 18 predicate places. [2022-07-19 21:27:18,582 INFO L495 AbstractCegarLoop]: Abstraction has has 774 places, 826 transitions, 1957 flow [2022-07-19 21:27:18,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 775.0666666666667) internal successors, (11626), 15 states have internal predecessors, (11626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:18,585 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:18,585 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:18,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:18,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:18,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:18,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -220081363, now seen corresponding path program 2 times [2022-07-19 21:27:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010600677] [2022-07-19 21:27:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 21:27:18,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010600677] [2022-07-19 21:27:18,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010600677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727636566] [2022-07-19 21:27:18,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:27:18,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:18,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:18,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:18,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:27:19,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:27:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:27:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:27:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 21:27:19,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:27:19,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727636566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:19,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:27:19,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-07-19 21:27:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450364359] [2022-07-19 21:27:19,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:27:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:27:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:27:19,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 755 out of 851 [2022-07-19 21:27:19,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 826 transitions, 1957 flow. Second operand has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:19,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:19,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 755 of 851 [2022-07-19 21:27:19,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:21,402 INFO L129 PetriNetUnfolder]: 1439/7059 cut-off events. [2022-07-19 21:27:21,402 INFO L130 PetriNetUnfolder]: For 3251/3619 co-relation queries the response was YES. [2022-07-19 21:27:21,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11045 conditions, 7059 events. 1439/7059 cut-off events. For 3251/3619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 74434 event pairs, 703 based on Foata normal form. 4/6478 useless extension candidates. Maximal degree in co-relation 11031. Up to 1306 conditions per place. [2022-07-19 21:27:21,575 INFO L132 encePairwiseOnDemand]: 838/851 looper letters, 111 selfloop transitions, 23 changer transitions 2/896 dead transitions. [2022-07-19 21:27:21,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 896 transitions, 2413 flow [2022-07-19 21:27:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5414 transitions. [2022-07-19 21:27:21,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9088467349336915 [2022-07-19 21:27:21,585 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5414 transitions. [2022-07-19 21:27:21,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5414 transitions. [2022-07-19 21:27:21,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:21,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5414 transitions. [2022-07-19 21:27:21,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 773.4285714285714) internal successors, (5414), 7 states have internal predecessors, (5414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:21,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:21,608 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:21,608 INFO L186 Difference]: Start difference. First operand has 774 places, 826 transitions, 1957 flow. Second operand 7 states and 5414 transitions. [2022-07-19 21:27:21,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 896 transitions, 2413 flow [2022-07-19 21:27:21,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 896 transitions, 2388 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-19 21:27:21,632 INFO L242 Difference]: Finished difference. Result has 780 places, 838 transitions, 2035 flow [2022-07-19 21:27:21,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2035, PETRI_PLACES=780, PETRI_TRANSITIONS=838} [2022-07-19 21:27:21,635 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 24 predicate places. [2022-07-19 21:27:21,635 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 838 transitions, 2035 flow [2022-07-19 21:27:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:21,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:21,637 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:21,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:21,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:27:21,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1347170811, now seen corresponding path program 3 times [2022-07-19 21:27:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047464109] [2022-07-19 21:27:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 21:27:22,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:22,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047464109] [2022-07-19 21:27:22,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047464109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:22,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792946331] [2022-07-19 21:27:22,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:27:22,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:22,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:22,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:22,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:27:22,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-19 21:27:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:27:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:27:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 21:27:22,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:27:22,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792946331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:22,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:27:22,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-07-19 21:27:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021511267] [2022-07-19 21:27:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:22,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:27:22,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:27:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:27:22,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 755 out of 851 [2022-07-19 21:27:22,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 838 transitions, 2035 flow. Second operand has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:22,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:22,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 755 of 851 [2022-07-19 21:27:22,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:24,803 INFO L129 PetriNetUnfolder]: 1616/9270 cut-off events. [2022-07-19 21:27:24,804 INFO L130 PetriNetUnfolder]: For 4815/5157 co-relation queries the response was YES. [2022-07-19 21:27:25,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13438 conditions, 9270 events. 1616/9270 cut-off events. For 4815/5157 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 105244 event pairs, 326 based on Foata normal form. 72/8651 useless extension candidates. Maximal degree in co-relation 13421. Up to 860 conditions per place. [2022-07-19 21:27:25,303 INFO L132 encePairwiseOnDemand]: 824/851 looper letters, 132 selfloop transitions, 42 changer transitions 3/937 dead transitions. [2022-07-19 21:27:25,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 937 transitions, 2763 flow [2022-07-19 21:27:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:27:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:27:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6949 transitions. [2022-07-19 21:27:25,315 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072986029507769 [2022-07-19 21:27:25,315 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6949 transitions. [2022-07-19 21:27:25,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6949 transitions. [2022-07-19 21:27:25,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:25,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6949 transitions. [2022-07-19 21:27:25,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 772.1111111111111) internal successors, (6949), 9 states have internal predecessors, (6949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:25,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 851.0) internal successors, (8510), 10 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:25,337 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 851.0) internal successors, (8510), 10 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:25,338 INFO L186 Difference]: Start difference. First operand has 780 places, 838 transitions, 2035 flow. Second operand 9 states and 6949 transitions. [2022-07-19 21:27:25,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 937 transitions, 2763 flow [2022-07-19 21:27:25,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 937 transitions, 2763 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:27:25,359 INFO L242 Difference]: Finished difference. Result has 792 places, 862 transitions, 2344 flow [2022-07-19 21:27:25,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2344, PETRI_PLACES=792, PETRI_TRANSITIONS=862} [2022-07-19 21:27:25,361 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 36 predicate places. [2022-07-19 21:27:25,361 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 862 transitions, 2344 flow [2022-07-19 21:27:25,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:25,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:25,363 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:25,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:25,584 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1558049619, now seen corresponding path program 4 times [2022-07-19 21:27:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:25,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421987319] [2022-07-19 21:27:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 21:27:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421987319] [2022-07-19 21:27:25,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421987319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464975277] [2022-07-19 21:27:25,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:27:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:25,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:25,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:27:25,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:27:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:27:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:27:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 21:27:26,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 21:27:26,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464975277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:26,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:26,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-07-19 21:27:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210161077] [2022-07-19 21:27:26,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:26,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 21:27:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 21:27:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:27:26,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 771 out of 851 [2022-07-19 21:27:26,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 862 transitions, 2344 flow. Second operand has 22 states, 22 states have (on average 774.6818181818181) internal successors, (17043), 22 states have internal predecessors, (17043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:26,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:26,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 771 of 851 [2022-07-19 21:27:26,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:27,088 INFO L129 PetriNetUnfolder]: 142/1950 cut-off events. [2022-07-19 21:27:27,088 INFO L130 PetriNetUnfolder]: For 1179/1316 co-relation queries the response was YES. [2022-07-19 21:27:27,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 1950 events. 142/1950 cut-off events. For 1179/1316 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 14117 event pairs, 9 based on Foata normal form. 6/1831 useless extension candidates. Maximal degree in co-relation 2800. Up to 75 conditions per place. [2022-07-19 21:27:27,153 INFO L132 encePairwiseOnDemand]: 827/851 looper letters, 54 selfloop transitions, 51 changer transitions 0/904 dead transitions. [2022-07-19 21:27:27,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 904 transitions, 2722 flow [2022-07-19 21:27:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:27:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:27:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 13218 transitions. [2022-07-19 21:27:27,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9136655837423101 [2022-07-19 21:27:27,174 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 13218 transitions. [2022-07-19 21:27:27,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 13218 transitions. [2022-07-19 21:27:27,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:27,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 13218 transitions. [2022-07-19 21:27:27,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 777.5294117647059) internal successors, (13218), 17 states have internal predecessors, (13218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:27,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 851.0) internal successors, (15318), 18 states have internal predecessors, (15318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:27,207 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 851.0) internal successors, (15318), 18 states have internal predecessors, (15318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:27,207 INFO L186 Difference]: Start difference. First operand has 792 places, 862 transitions, 2344 flow. Second operand 17 states and 13218 transitions. [2022-07-19 21:27:27,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 904 transitions, 2722 flow [2022-07-19 21:27:27,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 904 transitions, 2714 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:27,229 INFO L242 Difference]: Finished difference. Result has 809 places, 883 transitions, 2599 flow [2022-07-19 21:27:27,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2599, PETRI_PLACES=809, PETRI_TRANSITIONS=883} [2022-07-19 21:27:27,231 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 53 predicate places. [2022-07-19 21:27:27,231 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 883 transitions, 2599 flow [2022-07-19 21:27:27,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 774.6818181818181) internal successors, (17043), 22 states have internal predecessors, (17043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:27,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:27,234 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:27,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:27,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:27,460 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2100223413, now seen corresponding path program 5 times [2022-07-19 21:27:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868614688] [2022-07-19 21:27:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:27,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:27:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868614688] [2022-07-19 21:27:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868614688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:27,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:27,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207522942] [2022-07-19 21:27:27,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:27,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:27,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:27,573 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 790 out of 851 [2022-07-19 21:27:27,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 883 transitions, 2599 flow. Second operand has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:27,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:27,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 790 of 851 [2022-07-19 21:27:27,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:30,011 INFO L129 PetriNetUnfolder]: 892/10458 cut-off events. [2022-07-19 21:27:30,011 INFO L130 PetriNetUnfolder]: For 1809/1960 co-relation queries the response was YES. [2022-07-19 21:27:30,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12318 conditions, 10458 events. 892/10458 cut-off events. For 1809/1960 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 112535 event pairs, 93 based on Foata normal form. 4/9428 useless extension candidates. Maximal degree in co-relation 12293. Up to 303 conditions per place. [2022-07-19 21:27:30,233 INFO L132 encePairwiseOnDemand]: 846/851 looper letters, 28 selfloop transitions, 4 changer transitions 0/892 dead transitions. [2022-07-19 21:27:30,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 892 transitions, 2685 flow [2022-07-19 21:27:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2403 transitions. [2022-07-19 21:27:30,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9412455934195064 [2022-07-19 21:27:30,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2403 transitions. [2022-07-19 21:27:30,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2403 transitions. [2022-07-19 21:27:30,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:30,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2403 transitions. [2022-07-19 21:27:30,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 801.0) internal successors, (2403), 3 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:30,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:30,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:30,244 INFO L186 Difference]: Start difference. First operand has 809 places, 883 transitions, 2599 flow. Second operand 3 states and 2403 transitions. [2022-07-19 21:27:30,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 892 transitions, 2685 flow [2022-07-19 21:27:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 803 places, 892 transitions, 2618 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-07-19 21:27:30,270 INFO L242 Difference]: Finished difference. Result has 804 places, 884 transitions, 2550 flow [2022-07-19 21:27:30,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=801, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2550, PETRI_PLACES=804, PETRI_TRANSITIONS=884} [2022-07-19 21:27:30,272 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 48 predicate places. [2022-07-19 21:27:30,272 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 884 transitions, 2550 flow [2022-07-19 21:27:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:30,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:30,273 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:30,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:27:30,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -727000354, now seen corresponding path program 1 times [2022-07-19 21:27:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:30,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920022162] [2022-07-19 21:27:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:27:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920022162] [2022-07-19 21:27:30,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920022162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:30,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:30,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485908845] [2022-07-19 21:27:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:30,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 790 out of 851 [2022-07-19 21:27:30,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 884 transitions, 2550 flow. Second operand has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:30,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:30,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 790 of 851 [2022-07-19 21:27:30,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:33,416 INFO L129 PetriNetUnfolder]: 648/8930 cut-off events. [2022-07-19 21:27:33,416 INFO L130 PetriNetUnfolder]: For 2549/2836 co-relation queries the response was YES. [2022-07-19 21:27:33,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11349 conditions, 8930 events. 648/8930 cut-off events. For 2549/2836 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 91115 event pairs, 39 based on Foata normal form. 0/8232 useless extension candidates. Maximal degree in co-relation 11323. Up to 191 conditions per place. [2022-07-19 21:27:33,661 INFO L132 encePairwiseOnDemand]: 846/851 looper letters, 29 selfloop transitions, 4 changer transitions 0/894 dead transitions. [2022-07-19 21:27:33,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 894 transitions, 2641 flow [2022-07-19 21:27:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2404 transitions. [2022-07-19 21:27:33,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416372894633764 [2022-07-19 21:27:33,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2404 transitions. [2022-07-19 21:27:33,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2404 transitions. [2022-07-19 21:27:33,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:33,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2404 transitions. [2022-07-19 21:27:33,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 801.3333333333334) internal successors, (2404), 3 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:33,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:33,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:33,671 INFO L186 Difference]: Start difference. First operand has 804 places, 884 transitions, 2550 flow. Second operand 3 states and 2404 transitions. [2022-07-19 21:27:33,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 894 transitions, 2641 flow [2022-07-19 21:27:33,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 894 transitions, 2637 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:33,710 INFO L242 Difference]: Finished difference. Result has 806 places, 885 transitions, 2564 flow [2022-07-19 21:27:33,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2564, PETRI_PLACES=806, PETRI_TRANSITIONS=885} [2022-07-19 21:27:33,712 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 50 predicate places. [2022-07-19 21:27:33,712 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 885 transitions, 2564 flow [2022-07-19 21:27:33,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:33,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:33,713 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:33,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:27:33,713 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:33,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1159849994, now seen corresponding path program 1 times [2022-07-19 21:27:33,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:33,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625170785] [2022-07-19 21:27:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:27:33,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625170785] [2022-07-19 21:27:33,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625170785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:33,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:33,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:27:33,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231805246] [2022-07-19 21:27:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:33,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:27:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:27:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:27:33,815 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 790 out of 851 [2022-07-19 21:27:33,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 885 transitions, 2564 flow. Second operand has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:33,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:33,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 790 of 851 [2022-07-19 21:27:33,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:36,414 INFO L129 PetriNetUnfolder]: 1172/9283 cut-off events. [2022-07-19 21:27:36,414 INFO L130 PetriNetUnfolder]: For 1926/2314 co-relation queries the response was YES. [2022-07-19 21:27:36,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11453 conditions, 9283 events. 1172/9283 cut-off events. For 1926/2314 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 101492 event pairs, 390 based on Foata normal form. 2/8053 useless extension candidates. Maximal degree in co-relation 11426. Up to 934 conditions per place. [2022-07-19 21:27:36,685 INFO L132 encePairwiseOnDemand]: 846/851 looper letters, 27 selfloop transitions, 4 changer transitions 0/893 dead transitions. [2022-07-19 21:27:36,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 893 transitions, 2645 flow [2022-07-19 21:27:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:27:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:27:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2402 transitions. [2022-07-19 21:27:36,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9408538973756365 [2022-07-19 21:27:36,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2402 transitions. [2022-07-19 21:27:36,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2402 transitions. [2022-07-19 21:27:36,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:36,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2402 transitions. [2022-07-19 21:27:36,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 800.6666666666666) internal successors, (2402), 3 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:36,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:36,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:36,701 INFO L186 Difference]: Start difference. First operand has 806 places, 885 transitions, 2564 flow. Second operand 3 states and 2402 transitions. [2022-07-19 21:27:36,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 893 transitions, 2645 flow [2022-07-19 21:27:36,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 893 transitions, 2641 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:36,725 INFO L242 Difference]: Finished difference. Result has 808 places, 886 transitions, 2578 flow [2022-07-19 21:27:36,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=881, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2578, PETRI_PLACES=808, PETRI_TRANSITIONS=886} [2022-07-19 21:27:36,727 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 52 predicate places. [2022-07-19 21:27:36,728 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 886 transitions, 2578 flow [2022-07-19 21:27:36,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:36,728 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:36,729 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:36,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:27:36,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -86089824, now seen corresponding path program 1 times [2022-07-19 21:27:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602712838] [2022-07-19 21:27:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:27:36,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:36,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602712838] [2022-07-19 21:27:36,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602712838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:36,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:36,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:36,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881781502] [2022-07-19 21:27:36,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:36,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:36,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 758 out of 851 [2022-07-19 21:27:36,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 886 transitions, 2578 flow. Second operand has 6 states, 6 states have (on average 764.5) internal successors, (4587), 6 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:36,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:36,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 758 of 851 [2022-07-19 21:27:36,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:39,810 INFO L129 PetriNetUnfolder]: 595/8051 cut-off events. [2022-07-19 21:27:39,811 INFO L130 PetriNetUnfolder]: For 2064/2461 co-relation queries the response was YES. [2022-07-19 21:27:39,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10313 conditions, 8051 events. 595/8051 cut-off events. For 2064/2461 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 83175 event pairs, 52 based on Foata normal form. 26/7394 useless extension candidates. Maximal degree in co-relation 10285. Up to 435 conditions per place. [2022-07-19 21:27:40,031 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 55 selfloop transitions, 3 changer transitions 4/900 dead transitions. [2022-07-19 21:27:40,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 900 transitions, 2739 flow [2022-07-19 21:27:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5369 transitions. [2022-07-19 21:27:40,034 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9012925969447708 [2022-07-19 21:27:40,035 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5369 transitions. [2022-07-19 21:27:40,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5369 transitions. [2022-07-19 21:27:40,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:40,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5369 transitions. [2022-07-19 21:27:40,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 767.0) internal successors, (5369), 7 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:40,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:40,047 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:40,047 INFO L186 Difference]: Start difference. First operand has 808 places, 886 transitions, 2578 flow. Second operand 7 states and 5369 transitions. [2022-07-19 21:27:40,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 900 transitions, 2739 flow [2022-07-19 21:27:40,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 813 places, 900 transitions, 2735 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:40,074 INFO L242 Difference]: Finished difference. Result has 818 places, 888 transitions, 2599 flow [2022-07-19 21:27:40,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=818, PETRI_TRANSITIONS=888} [2022-07-19 21:27:40,076 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 62 predicate places. [2022-07-19 21:27:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 888 transitions, 2599 flow [2022-07-19 21:27:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 764.5) internal successors, (4587), 6 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:40,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:40,078 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:40,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:27:40,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 703092806, now seen corresponding path program 1 times [2022-07-19 21:27:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215192868] [2022-07-19 21:27:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:27:40,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215192868] [2022-07-19 21:27:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215192868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:40,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:40,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777416485] [2022-07-19 21:27:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:40,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:40,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 851 [2022-07-19 21:27:40,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 888 transitions, 2599 flow. Second operand has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:40,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:40,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 851 [2022-07-19 21:27:40,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:53,113 INFO L129 PetriNetUnfolder]: 8585/49260 cut-off events. [2022-07-19 21:27:53,113 INFO L130 PetriNetUnfolder]: For 40554/56446 co-relation queries the response was YES. [2022-07-19 21:27:54,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78648 conditions, 49260 events. 8585/49260 cut-off events. For 40554/56446 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 706252 event pairs, 3032 based on Foata normal form. 617/46700 useless extension candidates. Maximal degree in co-relation 78615. Up to 4529 conditions per place. [2022-07-19 21:27:54,479 INFO L132 encePairwiseOnDemand]: 838/851 looper letters, 212 selfloop transitions, 21 changer transitions 4/1034 dead transitions. [2022-07-19 21:27:54,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 1034 transitions, 3688 flow [2022-07-19 21:27:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5432 transitions. [2022-07-19 21:27:54,483 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9118683901292597 [2022-07-19 21:27:54,483 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5432 transitions. [2022-07-19 21:27:54,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5432 transitions. [2022-07-19 21:27:54,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:54,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5432 transitions. [2022-07-19 21:27:54,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 776.0) internal successors, (5432), 7 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,495 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,495 INFO L186 Difference]: Start difference. First operand has 818 places, 888 transitions, 2599 flow. Second operand 7 states and 5432 transitions. [2022-07-19 21:27:54,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 1034 transitions, 3688 flow [2022-07-19 21:27:54,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 1034 transitions, 3683 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:27:54,680 INFO L242 Difference]: Finished difference. Result has 824 places, 908 transitions, 2857 flow [2022-07-19 21:27:54,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2857, PETRI_PLACES=824, PETRI_TRANSITIONS=908} [2022-07-19 21:27:54,682 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 68 predicate places. [2022-07-19 21:27:54,682 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 908 transitions, 2857 flow [2022-07-19 21:27:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:54,684 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:54,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:27:54,684 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:27:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash 528390626, now seen corresponding path program 2 times [2022-07-19 21:27:54,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:54,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316984818] [2022-07-19 21:27:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:27:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316984818] [2022-07-19 21:27:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316984818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:54,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:54,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:54,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790739779] [2022-07-19 21:27:54,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:54,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:54,843 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 851 [2022-07-19 21:27:54,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 908 transitions, 2857 flow. Second operand has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:54,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 851 [2022-07-19 21:27:54,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:09,908 INFO L129 PetriNetUnfolder]: 9390/56262 cut-off events. [2022-07-19 21:28:09,908 INFO L130 PetriNetUnfolder]: For 53739/62951 co-relation queries the response was YES. [2022-07-19 21:28:11,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91328 conditions, 56262 events. 9390/56262 cut-off events. For 53739/62951 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 832646 event pairs, 4757 based on Foata normal form. 297/53561 useless extension candidates. Maximal degree in co-relation 91293. Up to 8166 conditions per place. [2022-07-19 21:28:11,411 INFO L132 encePairwiseOnDemand]: 835/851 looper letters, 195 selfloop transitions, 35 changer transitions 4/1031 dead transitions. [2022-07-19 21:28:11,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 1031 transitions, 3784 flow [2022-07-19 21:28:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:28:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:28:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4666 transitions. [2022-07-19 21:28:11,415 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9138268703486094 [2022-07-19 21:28:11,415 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4666 transitions. [2022-07-19 21:28:11,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4666 transitions. [2022-07-19 21:28:11,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:11,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4666 transitions. [2022-07-19 21:28:11,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 777.6666666666666) internal successors, (4666), 6 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 851.0) internal successors, (5957), 7 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 851.0) internal successors, (5957), 7 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,423 INFO L186 Difference]: Start difference. First operand has 824 places, 908 transitions, 2857 flow. Second operand 6 states and 4666 transitions. [2022-07-19 21:28:11,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 1031 transitions, 3784 flow [2022-07-19 21:28:11,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 1031 transitions, 3764 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-19 21:28:11,671 INFO L242 Difference]: Finished difference. Result has 833 places, 931 transitions, 3162 flow [2022-07-19 21:28:11,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3162, PETRI_PLACES=833, PETRI_TRANSITIONS=931} [2022-07-19 21:28:11,672 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 77 predicate places. [2022-07-19 21:28:11,672 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 931 transitions, 3162 flow [2022-07-19 21:28:11,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,673 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:11,674 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:11,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:28:11,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash -779960328, now seen corresponding path program 3 times [2022-07-19 21:28:11,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:11,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328159900] [2022-07-19 21:28:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:11,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-19 21:28:11,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:11,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328159900] [2022-07-19 21:28:11,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328159900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:11,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:11,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:28:11,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788374851] [2022-07-19 21:28:11,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:28:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:28:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:28:11,816 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 851 [2022-07-19 21:28:11,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 931 transitions, 3162 flow. Second operand has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:11,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 851 [2022-07-19 21:28:11,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand