./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/popl20-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:13:08,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:13:08,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:13:08,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:13:08,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:13:08,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:13:08,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:13:08,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:13:08,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:13:08,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:13:08,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:13:08,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:13:08,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:13:08,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:13:08,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:13:08,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:13:08,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:13:08,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:13:08,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:13:08,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:13:08,337 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:13:08,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:13:08,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:13:08,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:13:08,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:13:08,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:13:08,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:13:08,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:13:08,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:13:08,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:13:08,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:13:08,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:13:08,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:13:08,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:13:08,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:13:08,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:13:08,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:13:08,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:13:08,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:13:08,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:13:08,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:13:08,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:13:08,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:13:08,398 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:13:08,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:13:08,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:13:08,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:13:08,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:13:08,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:13:08,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:13:08,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:13:08,401 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:13:08,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:13:08,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:13:08,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:13:08,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:13:08,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:13:08,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:13:08,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:13:08,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:13:08,404 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:13:08,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:13:08,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:13:08,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:13:08,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:13:08,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:13:08,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:13:08,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:13:08,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:13:08,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:13:08,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:13:08,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:13:08,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:13:08,408 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:13:08,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:13:08,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:13:08,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-07-21 09:13:08,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:13:08,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:13:08,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:13:08,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:13:08,738 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:13:08,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-07-21 09:13:08,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a34509d/e734a236816d4620ae5cd47739d5c9f1/FLAG87269d3c9 [2022-07-21 09:13:09,172 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:13:09,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-07-21 09:13:09,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a34509d/e734a236816d4620ae5cd47739d5c9f1/FLAG87269d3c9 [2022-07-21 09:13:09,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a34509d/e734a236816d4620ae5cd47739d5c9f1 [2022-07-21 09:13:09,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:13:09,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:13:09,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:13:09,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:13:09,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:13:09,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdf01e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09, skipping insertion in model container [2022-07-21 09:13:09,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:13:09,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:13:09,820 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/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-07-21 09:13:09,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:13:09,835 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:13:09,878 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/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-07-21 09:13:09,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:13:09,890 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:13:09,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09 WrapperNode [2022-07-21 09:13:09,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:13:09,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:13:09,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:13:09,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:13:09,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,923 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-07-21 09:13:09,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:13:09,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:13:09,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:13:09,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:13:09,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:13:09,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:13:09,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:13:09,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:13:09,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (1/1) ... [2022-07-21 09:13:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:13:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:09,997 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) [2022-07-21 09:13:10,019 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 [2022-07-21 09:13:10,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:13:10,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:13:10,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:13:10,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:13:10,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:13:10,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:13:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:13:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:13:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:13:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:13:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:13:10,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:13:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:13:10,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:13:10,042 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:13:10,132 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:13:10,134 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:13:10,310 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:13:10,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:13:10,370 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:13:10,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:10 BoogieIcfgContainer [2022-07-21 09:13:10,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:13:10,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:13:10,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:13:10,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:13:10,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:13:09" (1/3) ... [2022-07-21 09:13:10,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243cc1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:10, skipping insertion in model container [2022-07-21 09:13:10,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:09" (2/3) ... [2022-07-21 09:13:10,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243cc1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:10, skipping insertion in model container [2022-07-21 09:13:10,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:10" (3/3) ... [2022-07-21 09:13:10,387 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-07-21 09:13:10,392 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:13:10,400 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:13:10,401 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:13:10,401 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:13:10,469 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:13:10,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-07-21 09:13:10,566 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2022-07-21 09:13:10,568 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:13:10,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-21 09:13:10,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-07-21 09:13:10,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-07-21 09:13:10,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:13:10,601 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@74ef0f41, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fadaaf [2022-07-21 09:13:10,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:13:10,639 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-21 09:13:10,641 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:13:10,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:10,642 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] [2022-07-21 09:13:10,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2022-07-21 09:13:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656253069] [2022-07-21 09:13:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:10,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656253069] [2022-07-21 09:13:10,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656253069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:10,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:10,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:13:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880081779] [2022-07-21 09:13:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:10,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:13:10,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:13:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:13:10,883 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-07-21 09:13:10,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:10,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-07-21 09:13:10,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:10,955 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-21 09:13:10,958 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-07-21 09:13:10,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-07-21 09:13:10,961 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-07-21 09:13:10,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-07-21 09:13:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:13:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:13:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-07-21 09:13:10,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-07-21 09:13:10,973 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-07-21 09:13:10,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-07-21 09:13:10,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:10,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-07-21 09:13:10,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,991 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:10,993 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-07-21 09:13:10,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-07-21 09:13:11,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:11,005 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-07-21 09:13:11,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-07-21 09:13:11,013 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-07-21 09:13:11,014 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-07-21 09:13:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,015 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:11,015 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] [2022-07-21 09:13:11,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:13:11,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:11,018 INFO L85 PathProgramCache]: Analyzing trace with hash -707015589, now seen corresponding path program 1 times [2022-07-21 09:13:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:11,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838552289] [2022-07-21 09:13:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:11,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:11,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838552289] [2022-07-21 09:13:11,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838552289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:11,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:11,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:13:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275589756] [2022-07-21 09:13:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:11,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:13:11,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:13:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:13:11,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2022-07-21 09:13:11,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:11,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2022-07-21 09:13:11,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:11,465 INFO L129 PetriNetUnfolder]: 62/188 cut-off events. [2022-07-21 09:13:11,466 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 09:13:11,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 188 events. 62/188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 552 event pairs, 26 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 326. Up to 80 conditions per place. [2022-07-21 09:13:11,468 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 28 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-07-21 09:13:11,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 225 flow [2022-07-21 09:13:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-07-21 09:13:11,472 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2022-07-21 09:13:11,472 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-07-21 09:13:11,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-07-21 09:13:11,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:11,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-07-21 09:13:11,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,477 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,477 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 358 transitions. [2022-07-21 09:13:11,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 225 flow [2022-07-21 09:13:11,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:11,480 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-07-21 09:13:11,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-07-21 09:13:11,481 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-07-21 09:13:11,481 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-07-21 09:13:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,482 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:11,482 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] [2022-07-21 09:13:11,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:13:11,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 334905647, now seen corresponding path program 1 times [2022-07-21 09:13:11,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133464016] [2022-07-21 09:13:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:13:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:11,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133464016] [2022-07-21 09:13:11,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133464016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:11,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:11,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:13:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596776862] [2022-07-21 09:13:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:11,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:13:11,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:13:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:13:11,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-07-21 09:13:11,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:11,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-07-21 09:13:11,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:11,692 INFO L129 PetriNetUnfolder]: 44/170 cut-off events. [2022-07-21 09:13:11,692 INFO L130 PetriNetUnfolder]: For 16/22 co-relation queries the response was YES. [2022-07-21 09:13:11,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 170 events. 44/170 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 23 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 297. Up to 70 conditions per place. [2022-07-21 09:13:11,694 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-07-21 09:13:11,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 233 flow [2022-07-21 09:13:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-07-21 09:13:11,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-07-21 09:13:11,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-07-21 09:13:11,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-07-21 09:13:11,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:11,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-07-21 09:13:11,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,700 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,700 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 6 states and 366 transitions. [2022-07-21 09:13:11,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 233 flow [2022-07-21 09:13:11,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 225 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:11,714 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2022-07-21 09:13:11,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-07-21 09:13:11,715 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2022-07-21 09:13:11,715 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2022-07-21 09:13:11,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:11,716 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] [2022-07-21 09:13:11,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:13:11,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1873075449, now seen corresponding path program 1 times [2022-07-21 09:13:11,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:11,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280196574] [2022-07-21 09:13:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:11,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280196574] [2022-07-21 09:13:11,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280196574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783675557] [2022-07-21 09:13:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:11,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:11,999 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) [2022-07-21 09:13:12,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:13:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:12,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:12,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:13,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783675557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:13,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145632075] [2022-07-21 09:13:13,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:13,051 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:13,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:13,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:13,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:13,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:15,545 INFO L129 PetriNetUnfolder]: 258/823 cut-off events. [2022-07-21 09:13:15,546 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-21 09:13:15,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 823 events. 258/823 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4945 event pairs, 2 based on Foata normal form. 4/826 useless extension candidates. Maximal degree in co-relation 1753. Up to 155 conditions per place. [2022-07-21 09:13:15,551 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 134 selfloop transitions, 117 changer transitions 49/341 dead transitions. [2022-07-21 09:13:15,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 341 transitions, 1630 flow [2022-07-21 09:13:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 09:13:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-21 09:13:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3541 transitions. [2022-07-21 09:13:15,558 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6433502906976745 [2022-07-21 09:13:15,558 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3541 transitions. [2022-07-21 09:13:15,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3541 transitions. [2022-07-21 09:13:15,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:15,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3541 transitions. [2022-07-21 09:13:15,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.328125) internal successors, (3541), 64 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,585 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,586 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 64 states and 3541 transitions. [2022-07-21 09:13:15,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 341 transitions, 1630 flow [2022-07-21 09:13:15,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 1580 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:15,597 INFO L242 Difference]: Finished difference. Result has 168 places, 202 transitions, 991 flow [2022-07-21 09:13:15,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=991, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2022-07-21 09:13:15,599 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-07-21 09:13:15,599 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 991 flow [2022-07-21 09:13:15,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:15,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:15,600 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] [2022-07-21 09:13:15,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:15,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:15,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1569915595, now seen corresponding path program 2 times [2022-07-21 09:13:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:15,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811888793] [2022-07-21 09:13:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:16,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811888793] [2022-07-21 09:13:16,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811888793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209555652] [2022-07-21 09:13:16,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:16,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:16,072 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) [2022-07-21 09:13:16,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:13:16,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:16,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:16,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209555652] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:16,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:16,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:13:16,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700746294] [2022-07-21 09:13:16,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:16,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:13:16,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:16,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:13:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:13:16,984 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:16,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 991 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:16,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:16,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:16,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:21,013 INFO L129 PetriNetUnfolder]: 452/1591 cut-off events. [2022-07-21 09:13:21,014 INFO L130 PetriNetUnfolder]: For 3915/3915 co-relation queries the response was YES. [2022-07-21 09:13:21,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5255 conditions, 1591 events. 452/1591 cut-off events. For 3915/3915 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11989 event pairs, 43 based on Foata normal form. 9/1595 useless extension candidates. Maximal degree in co-relation 5219. Up to 381 conditions per place. [2022-07-21 09:13:21,033 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 227 selfloop transitions, 266 changer transitions 56/590 dead transitions. [2022-07-21 09:13:21,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 590 transitions, 4581 flow [2022-07-21 09:13:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-21 09:13:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-21 09:13:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4757 transitions. [2022-07-21 09:13:21,044 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6357925688318632 [2022-07-21 09:13:21,044 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4757 transitions. [2022-07-21 09:13:21,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4757 transitions. [2022-07-21 09:13:21,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:21,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4757 transitions. [2022-07-21 09:13:21,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 54.67816091954023) internal successors, (4757), 87 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:21,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:21,078 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:21,079 INFO L186 Difference]: Start difference. First operand has 168 places, 202 transitions, 991 flow. Second operand 87 states and 4757 transitions. [2022-07-21 09:13:21,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 590 transitions, 4581 flow [2022-07-21 09:13:21,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 590 transitions, 4047 flow, removed 248 selfloop flow, removed 16 redundant places. [2022-07-21 09:13:21,126 INFO L242 Difference]: Finished difference. Result has 269 places, 428 transitions, 3374 flow [2022-07-21 09:13:21,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=3374, PETRI_PLACES=269, PETRI_TRANSITIONS=428} [2022-07-21 09:13:21,129 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 193 predicate places. [2022-07-21 09:13:21,129 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 428 transitions, 3374 flow [2022-07-21 09:13:21,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:21,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:21,130 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] [2022-07-21 09:13:21,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:13:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:21,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1618685851, now seen corresponding path program 3 times [2022-07-21 09:13:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17103184] [2022-07-21 09:13:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17103184] [2022-07-21 09:13:21,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17103184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299430805] [2022-07-21 09:13:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:13:21,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:21,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:21,597 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) [2022-07-21 09:13:21,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:13:21,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:13:21,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:21,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:22,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:22,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299430805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:22,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:22,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280949309] [2022-07-21 09:13:22,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:22,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:22,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 428 transitions, 3374 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:22,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:22,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:22,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:25,997 INFO L129 PetriNetUnfolder]: 490/1647 cut-off events. [2022-07-21 09:13:25,997 INFO L130 PetriNetUnfolder]: For 15362/15362 co-relation queries the response was YES. [2022-07-21 09:13:26,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7785 conditions, 1647 events. 490/1647 cut-off events. For 15362/15362 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12348 event pairs, 16 based on Foata normal form. 2/1646 useless extension candidates. Maximal degree in co-relation 7714. Up to 315 conditions per place. [2022-07-21 09:13:26,021 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 190 selfloop transitions, 394 changer transitions 32/657 dead transitions. [2022-07-21 09:13:26,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 657 transitions, 7175 flow [2022-07-21 09:13:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 09:13:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-21 09:13:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4564 transitions. [2022-07-21 09:13:26,037 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6393947884561502 [2022-07-21 09:13:26,037 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4564 transitions. [2022-07-21 09:13:26,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4564 transitions. [2022-07-21 09:13:26,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:26,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4564 transitions. [2022-07-21 09:13:26,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 54.98795180722892) internal successors, (4564), 83 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,058 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,059 INFO L186 Difference]: Start difference. First operand has 269 places, 428 transitions, 3374 flow. Second operand 83 states and 4564 transitions. [2022-07-21 09:13:26,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 657 transitions, 7175 flow [2022-07-21 09:13:26,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 657 transitions, 6691 flow, removed 242 selfloop flow, removed 12 redundant places. [2022-07-21 09:13:26,155 INFO L242 Difference]: Finished difference. Result has 338 places, 522 transitions, 4999 flow [2022-07-21 09:13:26,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4999, PETRI_PLACES=338, PETRI_TRANSITIONS=522} [2022-07-21 09:13:26,156 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 262 predicate places. [2022-07-21 09:13:26,156 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 522 transitions, 4999 flow [2022-07-21 09:13:26,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,157 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:26,158 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] [2022-07-21 09:13:26,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:13:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:26,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2101775999, now seen corresponding path program 4 times [2022-07-21 09:13:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:26,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518271746] [2022-07-21 09:13:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:26,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518271746] [2022-07-21 09:13:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518271746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23668462] [2022-07-21 09:13:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:13:26,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:26,654 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) [2022-07-21 09:13:26,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:13:26,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:13:26,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:27,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23668462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:27,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:27,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780456999] [2022-07-21 09:13:27,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:27,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:27,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 522 transitions, 4999 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:27,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:27,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:30,771 INFO L129 PetriNetUnfolder]: 650/2189 cut-off events. [2022-07-21 09:13:30,771 INFO L130 PetriNetUnfolder]: For 24593/24593 co-relation queries the response was YES. [2022-07-21 09:13:30,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11480 conditions, 2189 events. 650/2189 cut-off events. For 24593/24593 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17713 event pairs, 22 based on Foata normal form. 3/2189 useless extension candidates. Maximal degree in co-relation 11404. Up to 427 conditions per place. [2022-07-21 09:13:30,800 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 299 selfloop transitions, 484 changer transitions 24/848 dead transitions. [2022-07-21 09:13:30,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 848 transitions, 10549 flow [2022-07-21 09:13:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-21 09:13:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-21 09:13:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4335 transitions. [2022-07-21 09:13:30,837 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6462432915921288 [2022-07-21 09:13:30,837 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4335 transitions. [2022-07-21 09:13:30,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4335 transitions. [2022-07-21 09:13:30,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:30,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4335 transitions. [2022-07-21 09:13:30,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 55.57692307692308) internal successors, (4335), 78 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:30,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:30,857 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:30,857 INFO L186 Difference]: Start difference. First operand has 338 places, 522 transitions, 4999 flow. Second operand 78 states and 4335 transitions. [2022-07-21 09:13:30,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 848 transitions, 10549 flow [2022-07-21 09:13:30,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 848 transitions, 9655 flow, removed 201 selfloop flow, removed 40 redundant places. [2022-07-21 09:13:31,012 INFO L242 Difference]: Finished difference. Result has 391 places, 664 transitions, 7404 flow [2022-07-21 09:13:31,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7404, PETRI_PLACES=391, PETRI_TRANSITIONS=664} [2022-07-21 09:13:31,013 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2022-07-21 09:13:31,014 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 664 transitions, 7404 flow [2022-07-21 09:13:31,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:31,014 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:31,015 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] [2022-07-21 09:13:31,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:31,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 512513747, now seen corresponding path program 5 times [2022-07-21 09:13:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:31,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836585532] [2022-07-21 09:13:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:31,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:31,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836585532] [2022-07-21 09:13:31,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836585532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799871118] [2022-07-21 09:13:31,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:13:31,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:31,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:31,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:31,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:13:31,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:31,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:31,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799871118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:32,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:32,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:32,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787210239] [2022-07-21 09:13:32,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:32,221 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:32,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 664 transitions, 7404 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:32,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:32,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:32,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:36,205 INFO L129 PetriNetUnfolder]: 665/2221 cut-off events. [2022-07-21 09:13:36,205 INFO L130 PetriNetUnfolder]: For 37552/37552 co-relation queries the response was YES. [2022-07-21 09:13:36,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 2221 events. 665/2221 cut-off events. For 37552/37552 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17983 event pairs, 28 based on Foata normal form. 5/2222 useless extension candidates. Maximal degree in co-relation 13060. Up to 425 conditions per place. [2022-07-21 09:13:36,302 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 249 selfloop transitions, 523 changer transitions 35/848 dead transitions. [2022-07-21 09:13:36,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 848 transitions, 11873 flow [2022-07-21 09:13:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-21 09:13:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-07-21 09:13:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5073 transitions. [2022-07-21 09:13:36,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6411779575328614 [2022-07-21 09:13:36,319 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5073 transitions. [2022-07-21 09:13:36,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5073 transitions. [2022-07-21 09:13:36,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:36,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5073 transitions. [2022-07-21 09:13:36,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 55.141304347826086) internal successors, (5073), 92 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,351 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,352 INFO L186 Difference]: Start difference. First operand has 391 places, 664 transitions, 7404 flow. Second operand 92 states and 5073 transitions. [2022-07-21 09:13:36,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 848 transitions, 11873 flow [2022-07-21 09:13:36,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 848 transitions, 11067 flow, removed 283 selfloop flow, removed 32 redundant places. [2022-07-21 09:13:36,539 INFO L242 Difference]: Finished difference. Result has 461 places, 689 transitions, 8557 flow [2022-07-21 09:13:36,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=8557, PETRI_PLACES=461, PETRI_TRANSITIONS=689} [2022-07-21 09:13:36,541 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 385 predicate places. [2022-07-21 09:13:36,541 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 689 transitions, 8557 flow [2022-07-21 09:13:36,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:36,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:36,542 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] [2022-07-21 09:13:36,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:36,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:36,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1925482755, now seen corresponding path program 6 times [2022-07-21 09:13:36,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:36,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856171305] [2022-07-21 09:13:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:36,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:36,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856171305] [2022-07-21 09:13:36,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856171305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:36,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439716626] [2022-07-21 09:13:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:13:36,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:36,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:36,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:13:37,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:13:37,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:13:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:37,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:38,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439716626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:38,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:38,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-07-21 09:13:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595201498] [2022-07-21 09:13:38,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 09:13:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 09:13:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 09:13:38,176 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:38,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 689 transitions, 8557 flow. Second operand has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:38,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:38,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:38,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:40,965 INFO L129 PetriNetUnfolder]: 887/2912 cut-off events. [2022-07-21 09:13:40,965 INFO L130 PetriNetUnfolder]: For 49528/49528 co-relation queries the response was YES. [2022-07-21 09:13:41,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18206 conditions, 2912 events. 887/2912 cut-off events. For 49528/49528 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25336 event pairs, 33 based on Foata normal form. 2/2905 useless extension candidates. Maximal degree in co-relation 18100. Up to 777 conditions per place. [2022-07-21 09:13:41,055 INFO L132 encePairwiseOnDemand]: 66/86 looper letters, 296 selfloop transitions, 714 changer transitions 36/1087 dead transitions. [2022-07-21 09:13:41,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1087 transitions, 16485 flow [2022-07-21 09:13:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 09:13:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-21 09:13:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3501 transitions. [2022-07-21 09:13:41,060 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6360828488372093 [2022-07-21 09:13:41,060 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3501 transitions. [2022-07-21 09:13:41,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3501 transitions. [2022-07-21 09:13:41,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:41,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3501 transitions. [2022-07-21 09:13:41,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.703125) internal successors, (3501), 64 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:41,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:41,072 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:41,072 INFO L186 Difference]: Start difference. First operand has 461 places, 689 transitions, 8557 flow. Second operand 64 states and 3501 transitions. [2022-07-21 09:13:41,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1087 transitions, 16485 flow [2022-07-21 09:13:41,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1087 transitions, 15330 flow, removed 147 selfloop flow, removed 66 redundant places. [2022-07-21 09:13:41,447 INFO L242 Difference]: Finished difference. Result has 468 places, 971 transitions, 14134 flow [2022-07-21 09:13:41,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=14134, PETRI_PLACES=468, PETRI_TRANSITIONS=971} [2022-07-21 09:13:41,448 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 392 predicate places. [2022-07-21 09:13:41,448 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 971 transitions, 14134 flow [2022-07-21 09:13:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:41,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:41,449 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] [2022-07-21 09:13:41,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 09:13:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:41,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -384124897, now seen corresponding path program 7 times [2022-07-21 09:13:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887317092] [2022-07-21 09:13:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:41,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887317092] [2022-07-21 09:13:41,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887317092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457875170] [2022-07-21 09:13:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:13:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:41,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:13:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:42,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:42,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457875170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:42,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:42,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029958466] [2022-07-21 09:13:42,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:42,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:42,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:42,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 971 transitions, 14134 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:42,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:42,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:42,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:45,944 INFO L129 PetriNetUnfolder]: 947/3122 cut-off events. [2022-07-21 09:13:45,944 INFO L130 PetriNetUnfolder]: For 58740/58740 co-relation queries the response was YES. [2022-07-21 09:13:45,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21444 conditions, 3122 events. 947/3122 cut-off events. For 58740/58740 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 27451 event pairs, 58 based on Foata normal form. 2/3118 useless extension candidates. Maximal degree in co-relation 21327. Up to 950 conditions per place. [2022-07-21 09:13:46,009 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 330 selfloop transitions, 852 changer transitions 12/1235 dead transitions. [2022-07-21 09:13:46,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1235 transitions, 21050 flow [2022-07-21 09:13:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 09:13:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-21 09:13:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3758 transitions. [2022-07-21 09:13:46,016 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6426128590971272 [2022-07-21 09:13:46,016 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3758 transitions. [2022-07-21 09:13:46,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3758 transitions. [2022-07-21 09:13:46,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:46,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3758 transitions. [2022-07-21 09:13:46,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.26470588235294) internal successors, (3758), 68 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,033 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,034 INFO L186 Difference]: Start difference. First operand has 468 places, 971 transitions, 14134 flow. Second operand 68 states and 3758 transitions. [2022-07-21 09:13:46,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1235 transitions, 21050 flow [2022-07-21 09:13:46,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1235 transitions, 20056 flow, removed 335 selfloop flow, removed 27 redundant places. [2022-07-21 09:13:46,517 INFO L242 Difference]: Finished difference. Result has 521 places, 1131 transitions, 19020 flow [2022-07-21 09:13:46,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=19020, PETRI_PLACES=521, PETRI_TRANSITIONS=1131} [2022-07-21 09:13:46,519 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 445 predicate places. [2022-07-21 09:13:46,519 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1131 transitions, 19020 flow [2022-07-21 09:13:46,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:46,520 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] [2022-07-21 09:13:46,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:46,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:46,729 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 191624049, now seen corresponding path program 8 times [2022-07-21 09:13:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924272346] [2022-07-21 09:13:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:47,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924272346] [2022-07-21 09:13:47,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924272346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077423017] [2022-07-21 09:13:47,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:47,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:47,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:47,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:13:47,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:47,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:47,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:47,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:47,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077423017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:47,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:47,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672992929] [2022-07-21 09:13:47,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:47,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:47,819 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:47,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1131 transitions, 19020 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:47,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:47,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:47,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:51,097 INFO L129 PetriNetUnfolder]: 947/3111 cut-off events. [2022-07-21 09:13:51,097 INFO L130 PetriNetUnfolder]: For 71630/71630 co-relation queries the response was YES. [2022-07-21 09:13:51,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22562 conditions, 3111 events. 947/3111 cut-off events. For 71630/71630 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27379 event pairs, 69 based on Foata normal form. 2/3107 useless extension candidates. Maximal degree in co-relation 22442. Up to 905 conditions per place. [2022-07-21 09:13:51,145 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 391 selfloop transitions, 776 changer transitions 14/1222 dead transitions. [2022-07-21 09:13:51,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1222 transitions, 22967 flow [2022-07-21 09:13:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 09:13:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-21 09:13:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3416 transitions. [2022-07-21 09:13:51,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6406601650412603 [2022-07-21 09:13:51,150 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3416 transitions. [2022-07-21 09:13:51,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3416 transitions. [2022-07-21 09:13:51,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:51,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3416 transitions. [2022-07-21 09:13:51,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 55.096774193548384) internal successors, (3416), 62 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:51,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:51,163 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:51,163 INFO L186 Difference]: Start difference. First operand has 521 places, 1131 transitions, 19020 flow. Second operand 62 states and 3416 transitions. [2022-07-21 09:13:51,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1222 transitions, 22967 flow [2022-07-21 09:13:51,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1222 transitions, 21899 flow, removed 243 selfloop flow, removed 36 redundant places. [2022-07-21 09:13:51,686 INFO L242 Difference]: Finished difference. Result has 550 places, 1141 transitions, 19828 flow [2022-07-21 09:13:51,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18007, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=19828, PETRI_PLACES=550, PETRI_TRANSITIONS=1141} [2022-07-21 09:13:51,688 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 474 predicate places. [2022-07-21 09:13:51,688 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1141 transitions, 19828 flow [2022-07-21 09:13:51,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:51,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:51,689 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] [2022-07-21 09:13:51,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:51,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 09:13:51,890 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash 866299875, now seen corresponding path program 9 times [2022-07-21 09:13:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:51,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228378855] [2022-07-21 09:13:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:51,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:52,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228378855] [2022-07-21 09:13:52,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228378855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:52,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336369343] [2022-07-21 09:13:52,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:13:52,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:52,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:52,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:13:52,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:13:52,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:52,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336369343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:52,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:52,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985003684] [2022-07-21 09:13:52,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:52,784 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:52,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1141 transitions, 19828 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:52,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:52,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:52,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:55,097 INFO L129 PetriNetUnfolder]: 1014/3285 cut-off events. [2022-07-21 09:13:55,098 INFO L130 PetriNetUnfolder]: For 75708/75708 co-relation queries the response was YES. [2022-07-21 09:13:55,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24752 conditions, 3285 events. 1014/3285 cut-off events. For 75708/75708 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29142 event pairs, 71 based on Foata normal form. 1/3277 useless extension candidates. Maximal degree in co-relation 24629. Up to 1420 conditions per place. [2022-07-21 09:13:55,158 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 534 selfloop transitions, 731 changer transitions 6/1312 dead transitions. [2022-07-21 09:13:55,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1312 transitions, 25324 flow [2022-07-21 09:13:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 09:13:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-21 09:13:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2311 transitions. [2022-07-21 09:13:55,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6398117386489479 [2022-07-21 09:13:55,163 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2311 transitions. [2022-07-21 09:13:55,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2311 transitions. [2022-07-21 09:13:55,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:55,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2311 transitions. [2022-07-21 09:13:55,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.023809523809526) internal successors, (2311), 42 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,172 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,172 INFO L186 Difference]: Start difference. First operand has 550 places, 1141 transitions, 19828 flow. Second operand 42 states and 2311 transitions. [2022-07-21 09:13:55,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1312 transitions, 25324 flow [2022-07-21 09:13:55,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1312 transitions, 24867 flow, removed 45 selfloop flow, removed 33 redundant places. [2022-07-21 09:13:55,729 INFO L242 Difference]: Finished difference. Result has 567 places, 1256 transitions, 24144 flow [2022-07-21 09:13:55,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=19445, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=24144, PETRI_PLACES=567, PETRI_TRANSITIONS=1256} [2022-07-21 09:13:55,731 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 491 predicate places. [2022-07-21 09:13:55,731 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1256 transitions, 24144 flow [2022-07-21 09:13:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:55,732 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] [2022-07-21 09:13:55,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:55,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:55,933 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -702432183, now seen corresponding path program 10 times [2022-07-21 09:13:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:55,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614626285] [2022-07-21 09:13:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:55,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614626285] [2022-07-21 09:13:56,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614626285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439395933] [2022-07-21 09:13:56,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:13:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:56,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:56,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:56,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:13:56,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:13:56,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:56,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:13:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439395933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:56,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:56,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:13:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623381610] [2022-07-21 09:13:56,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:56,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:13:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:13:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:13:56,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:13:56,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1256 transitions, 24144 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:56,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:56,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:13:56,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:59,888 INFO L129 PetriNetUnfolder]: 1050/3409 cut-off events. [2022-07-21 09:13:59,889 INFO L130 PetriNetUnfolder]: For 84144/84144 co-relation queries the response was YES. [2022-07-21 09:13:59,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27520 conditions, 3409 events. 1050/3409 cut-off events. For 84144/84144 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30540 event pairs, 65 based on Foata normal form. 1/3403 useless extension candidates. Maximal degree in co-relation 27390. Up to 1333 conditions per place. [2022-07-21 09:13:59,949 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 469 selfloop transitions, 870 changer transitions 6/1386 dead transitions. [2022-07-21 09:13:59,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1386 transitions, 29401 flow [2022-07-21 09:13:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 09:13:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-21 09:13:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2809 transitions. [2022-07-21 09:13:59,953 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6404468764249887 [2022-07-21 09:13:59,953 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2809 transitions. [2022-07-21 09:13:59,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2809 transitions. [2022-07-21 09:13:59,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:59,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2809 transitions. [2022-07-21 09:13:59,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.07843137254902) internal successors, (2809), 51 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:59,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:59,966 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:59,966 INFO L186 Difference]: Start difference. First operand has 567 places, 1256 transitions, 24144 flow. Second operand 51 states and 2809 transitions. [2022-07-21 09:13:59,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1386 transitions, 29401 flow [2022-07-21 09:14:00,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1386 transitions, 29251 flow, removed 56 selfloop flow, removed 9 redundant places. [2022-07-21 09:14:00,752 INFO L242 Difference]: Finished difference. Result has 617 places, 1314 transitions, 27516 flow [2022-07-21 09:14:00,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=24014, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=27516, PETRI_PLACES=617, PETRI_TRANSITIONS=1314} [2022-07-21 09:14:00,754 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 541 predicate places. [2022-07-21 09:14:00,754 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1314 transitions, 27516 flow [2022-07-21 09:14:00,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:00,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:00,755 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] [2022-07-21 09:14:00,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:00,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:14:00,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash -499373303, now seen corresponding path program 11 times [2022-07-21 09:14:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781929194] [2022-07-21 09:14:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781929194] [2022-07-21 09:14:01,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781929194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472894391] [2022-07-21 09:14:01,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:14:01,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:01,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:01,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:01,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:14:01,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:14:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:01,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:01,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472894391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:01,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:01,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:14:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155383924] [2022-07-21 09:14:01,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:14:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:14:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:14:01,890 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:01,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1314 transitions, 27516 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:01,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:01,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:01,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:04,983 INFO L129 PetriNetUnfolder]: 1090/3540 cut-off events. [2022-07-21 09:14:04,983 INFO L130 PetriNetUnfolder]: For 100524/100524 co-relation queries the response was YES. [2022-07-21 09:14:05,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30602 conditions, 3540 events. 1090/3540 cut-off events. For 100524/100524 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32151 event pairs, 71 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 30462. Up to 1496 conditions per place. [2022-07-21 09:14:05,046 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 591 selfloop transitions, 849 changer transitions 12/1493 dead transitions. [2022-07-21 09:14:05,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1493 transitions, 33976 flow [2022-07-21 09:14:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 09:14:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-21 09:14:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2845 transitions. [2022-07-21 09:14:05,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.636180679785331 [2022-07-21 09:14:05,049 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2845 transitions. [2022-07-21 09:14:05,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2845 transitions. [2022-07-21 09:14:05,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:05,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2845 transitions. [2022-07-21 09:14:05,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.71153846153846) internal successors, (2845), 52 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,057 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,057 INFO L186 Difference]: Start difference. First operand has 617 places, 1314 transitions, 27516 flow. Second operand 52 states and 2845 transitions. [2022-07-21 09:14:05,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1493 transitions, 33976 flow [2022-07-21 09:14:05,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1493 transitions, 33404 flow, removed 120 selfloop flow, removed 30 redundant places. [2022-07-21 09:14:05,970 INFO L242 Difference]: Finished difference. Result has 653 places, 1414 transitions, 32136 flow [2022-07-21 09:14:05,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=26987, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=32136, PETRI_PLACES=653, PETRI_TRANSITIONS=1414} [2022-07-21 09:14:05,972 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 577 predicate places. [2022-07-21 09:14:05,973 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 1414 transitions, 32136 flow [2022-07-21 09:14:05,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:05,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:05,973 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] [2022-07-21 09:14:06,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:06,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:14:06,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1679895921, now seen corresponding path program 12 times [2022-07-21 09:14:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238418895] [2022-07-21 09:14:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:06,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:06,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238418895] [2022-07-21 09:14:06,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238418895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:06,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260011872] [2022-07-21 09:14:06,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:14:06,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:06,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:06,436 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:06,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:14:06,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:14:06,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:06,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:06,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:07,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260011872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:07,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:07,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:14:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60420246] [2022-07-21 09:14:07,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:14:07,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:14:07,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:14:07,240 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:07,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1414 transitions, 32136 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:07,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:07,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:07,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:10,195 INFO L129 PetriNetUnfolder]: 1090/3513 cut-off events. [2022-07-21 09:14:10,195 INFO L130 PetriNetUnfolder]: For 112870/112870 co-relation queries the response was YES. [2022-07-21 09:14:10,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32702 conditions, 3513 events. 1090/3513 cut-off events. For 112870/112870 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31753 event pairs, 77 based on Foata normal form. 1/3508 useless extension candidates. Maximal degree in co-relation 32547. Up to 1290 conditions per place. [2022-07-21 09:14:10,274 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 619 selfloop transitions, 818 changer transitions 8/1486 dead transitions. [2022-07-21 09:14:10,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1486 transitions, 36282 flow [2022-07-21 09:14:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 09:14:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-21 09:14:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2688 transitions. [2022-07-21 09:14:10,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2022-07-21 09:14:10,278 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2688 transitions. [2022-07-21 09:14:10,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2688 transitions. [2022-07-21 09:14:10,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:10,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2688 transitions. [2022-07-21 09:14:10,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.857142857142854) internal successors, (2688), 49 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:10,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:10,286 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:10,286 INFO L186 Difference]: Start difference. First operand has 653 places, 1414 transitions, 32136 flow. Second operand 49 states and 2688 transitions. [2022-07-21 09:14:10,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1486 transitions, 36282 flow [2022-07-21 09:14:11,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1486 transitions, 35686 flow, removed 121 selfloop flow, removed 26 redundant places. [2022-07-21 09:14:11,491 INFO L242 Difference]: Finished difference. Result has 675 places, 1420 transitions, 33451 flow [2022-07-21 09:14:11,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=31572, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=33451, PETRI_PLACES=675, PETRI_TRANSITIONS=1420} [2022-07-21 09:14:11,493 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 599 predicate places. [2022-07-21 09:14:11,494 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1420 transitions, 33451 flow [2022-07-21 09:14:11,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:11,494 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:11,494 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] [2022-07-21 09:14:11,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:11,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:14:11,707 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash 927311605, now seen corresponding path program 13 times [2022-07-21 09:14:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530513280] [2022-07-21 09:14:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:11,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:11,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530513280] [2022-07-21 09:14:11,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530513280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:11,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51051520] [2022-07-21 09:14:11,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:14:11,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:11,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:11,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:11,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:14:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:11,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:12,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:12,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51051520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:12,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:14:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446870197] [2022-07-21 09:14:12,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:12,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:14:12,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:14:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:14:12,556 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:12,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1420 transitions, 33451 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:12,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:12,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:12,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:16,434 INFO L129 PetriNetUnfolder]: 1124/3638 cut-off events. [2022-07-21 09:14:16,434 INFO L130 PetriNetUnfolder]: For 121515/121515 co-relation queries the response was YES. [2022-07-21 09:14:16,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34747 conditions, 3638 events. 1124/3638 cut-off events. For 121515/121515 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33167 event pairs, 67 based on Foata normal form. 1/3633 useless extension candidates. Maximal degree in co-relation 34594. Up to 1403 conditions per place. [2022-07-21 09:14:16,492 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 521 selfloop transitions, 1006 changer transitions 6/1574 dead transitions. [2022-07-21 09:14:16,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 1574 transitions, 39871 flow [2022-07-21 09:14:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 09:14:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-21 09:14:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3189 transitions. [2022-07-21 09:14:16,495 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6393344025661588 [2022-07-21 09:14:16,495 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3189 transitions. [2022-07-21 09:14:16,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3189 transitions. [2022-07-21 09:14:16,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:16,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3189 transitions. [2022-07-21 09:14:16,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.98275862068966) internal successors, (3189), 58 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,503 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,504 INFO L186 Difference]: Start difference. First operand has 675 places, 1420 transitions, 33451 flow. Second operand 58 states and 3189 transitions. [2022-07-21 09:14:16,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 1574 transitions, 39871 flow [2022-07-21 09:14:17,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1574 transitions, 39285 flow, removed 47 selfloop flow, removed 35 redundant places. [2022-07-21 09:14:17,548 INFO L242 Difference]: Finished difference. Result has 708 places, 1488 transitions, 37088 flow [2022-07-21 09:14:17,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=32947, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=939, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=37088, PETRI_PLACES=708, PETRI_TRANSITIONS=1488} [2022-07-21 09:14:17,550 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 632 predicate places. [2022-07-21 09:14:17,551 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 1488 transitions, 37088 flow [2022-07-21 09:14:17,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:17,551 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:17,551 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] [2022-07-21 09:14:17,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-21 09:14:17,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:14:17,765 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1524161261, now seen corresponding path program 14 times [2022-07-21 09:14:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:17,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074370564] [2022-07-21 09:14:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:17,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074370564] [2022-07-21 09:14:17,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074370564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:17,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732921807] [2022-07-21 09:14:17,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:14:17,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:17,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:17,958 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:17,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:14:18,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:14:18,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:18,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:18,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732921807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:18,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:18,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:14:18,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233911091] [2022-07-21 09:14:18,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:14:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:18,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:14:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:14:18,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:18,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1488 transitions, 37088 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:18,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:18,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:18,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:21,481 INFO L129 PetriNetUnfolder]: 1151/3716 cut-off events. [2022-07-21 09:14:21,481 INFO L130 PetriNetUnfolder]: For 138497/138497 co-relation queries the response was YES. [2022-07-21 09:14:21,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37388 conditions, 3716 events. 1151/3716 cut-off events. For 138497/138497 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34126 event pairs, 76 based on Foata normal form. 1/3708 useless extension candidates. Maximal degree in co-relation 37226. Up to 1366 conditions per place. [2022-07-21 09:14:21,546 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 700 selfloop transitions, 872 changer transitions 8/1621 dead transitions. [2022-07-21 09:14:21,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 1621 transitions, 43426 flow [2022-07-21 09:14:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 09:14:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-21 09:14:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2212 transitions. [2022-07-21 09:14:21,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6430232558139535 [2022-07-21 09:14:21,548 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2212 transitions. [2022-07-21 09:14:21,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2212 transitions. [2022-07-21 09:14:21,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:21,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2212 transitions. [2022-07-21 09:14:21,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.3) internal successors, (2212), 40 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:21,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:21,552 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:21,552 INFO L186 Difference]: Start difference. First operand has 708 places, 1488 transitions, 37088 flow. Second operand 40 states and 2212 transitions. [2022-07-21 09:14:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 1621 transitions, 43426 flow [2022-07-21 09:14:22,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 1621 transitions, 41918 flow, removed 297 selfloop flow, removed 26 redundant places. [2022-07-21 09:14:22,715 INFO L242 Difference]: Finished difference. Result has 728 places, 1534 transitions, 40174 flow [2022-07-21 09:14:22,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=35831, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=40174, PETRI_PLACES=728, PETRI_TRANSITIONS=1534} [2022-07-21 09:14:22,717 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 652 predicate places. [2022-07-21 09:14:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1534 transitions, 40174 flow [2022-07-21 09:14:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:22,718 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:22,718 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] [2022-07-21 09:14:22,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:22,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:22,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1446911885, now seen corresponding path program 15 times [2022-07-21 09:14:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:22,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355273709] [2022-07-21 09:14:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355273709] [2022-07-21 09:14:23,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355273709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54421867] [2022-07-21 09:14:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:14:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:23,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:23,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:14:23,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:14:23,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:23,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:23,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:23,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54421867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:23,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:23,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-21 09:14:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537343320] [2022-07-21 09:14:23,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:23,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:14:23,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:14:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:14:23,939 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:23,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1534 transitions, 40174 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:23,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:23,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:23,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:26,940 INFO L129 PetriNetUnfolder]: 1150/3701 cut-off events. [2022-07-21 09:14:26,940 INFO L130 PetriNetUnfolder]: For 144718/144728 co-relation queries the response was YES. [2022-07-21 09:14:26,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 3701 events. 1150/3701 cut-off events. For 144718/144728 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 33898 event pairs, 84 based on Foata normal form. 3/3696 useless extension candidates. Maximal degree in co-relation 38399. Up to 1325 conditions per place. [2022-07-21 09:14:27,008 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 668 selfloop transitions, 887 changer transitions 8/1604 dead transitions. [2022-07-21 09:14:27,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1604 transitions, 44622 flow [2022-07-21 09:14:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 09:14:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-21 09:14:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2370 transitions. [2022-07-21 09:14:27,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6408869659275284 [2022-07-21 09:14:27,011 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2370 transitions. [2022-07-21 09:14:27,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2370 transitions. [2022-07-21 09:14:27,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:27,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2370 transitions. [2022-07-21 09:14:27,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.116279069767444) internal successors, (2370), 43 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:27,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:27,016 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:27,016 INFO L186 Difference]: Start difference. First operand has 728 places, 1534 transitions, 40174 flow. Second operand 43 states and 2370 transitions. [2022-07-21 09:14:27,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1604 transitions, 44622 flow [2022-07-21 09:14:28,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 1604 transitions, 44074 flow, removed 39 selfloop flow, removed 24 redundant places. [2022-07-21 09:14:28,259 INFO L242 Difference]: Finished difference. Result has 747 places, 1536 transitions, 41560 flow [2022-07-21 09:14:28,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=39650, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=41560, PETRI_PLACES=747, PETRI_TRANSITIONS=1536} [2022-07-21 09:14:28,261 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 671 predicate places. [2022-07-21 09:14:28,261 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 1536 transitions, 41560 flow [2022-07-21 09:14:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:28,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:28,262 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] [2022-07-21 09:14:28,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:28,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:14:28,470 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash -929958727, now seen corresponding path program 16 times [2022-07-21 09:14:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486313998] [2022-07-21 09:14:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:28,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:28,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486313998] [2022-07-21 09:14:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486313998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770082268] [2022-07-21 09:14:28,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:14:28,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:28,503 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:28,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:14:28,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:14:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:14:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:28,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:28,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770082268] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:28,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:28,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-21 09:14:28,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354140313] [2022-07-21 09:14:28,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:28,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:14:28,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:14:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:14:28,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-07-21 09:14:28,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 1536 transitions, 41560 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:28,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:28,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-07-21 09:14:28,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:30,163 INFO L129 PetriNetUnfolder]: 1069/3417 cut-off events. [2022-07-21 09:14:30,163 INFO L130 PetriNetUnfolder]: For 141639/141786 co-relation queries the response was YES. [2022-07-21 09:14:30,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35802 conditions, 3417 events. 1069/3417 cut-off events. For 141639/141786 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30981 event pairs, 57 based on Foata normal form. 45/3447 useless extension candidates. Maximal degree in co-relation 35633. Up to 1010 conditions per place. [2022-07-21 09:14:30,236 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 412 selfloop transitions, 552 changer transitions 0/1522 dead transitions. [2022-07-21 09:14:30,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1522 transitions, 43430 flow [2022-07-21 09:14:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:14:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:14:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2022-07-21 09:14:30,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8395348837209302 [2022-07-21 09:14:30,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2022-07-21 09:14:30,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2022-07-21 09:14:30,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:30,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2022-07-21 09:14:30,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,238 INFO L186 Difference]: Start difference. First operand has 747 places, 1536 transitions, 41560 flow. Second operand 5 states and 361 transitions. [2022-07-21 09:14:30,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1522 transitions, 43430 flow [2022-07-21 09:14:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 1522 transitions, 43044 flow, removed 47 selfloop flow, removed 27 redundant places. [2022-07-21 09:14:31,514 INFO L242 Difference]: Finished difference. Result has 691 places, 1514 transitions, 43095 flow [2022-07-21 09:14:31,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40325, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=43095, PETRI_PLACES=691, PETRI_TRANSITIONS=1514} [2022-07-21 09:14:31,516 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 615 predicate places. [2022-07-21 09:14:31,516 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 1514 transitions, 43095 flow [2022-07-21 09:14:31,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:31,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:31,516 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] [2022-07-21 09:14:31,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:31,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:31,717 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash 995476421, now seen corresponding path program 17 times [2022-07-21 09:14:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:31,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841781972] [2022-07-21 09:14:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:31,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841781972] [2022-07-21 09:14:31,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841781972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321295158] [2022-07-21 09:14:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:14:31,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:31,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:31,933 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:31,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:14:31,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:14:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:31,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:32,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:32,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321295158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:32,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:32,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-21 09:14:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553423944] [2022-07-21 09:14:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 09:14:32,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 09:14:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:14:32,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:32,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 1514 transitions, 43095 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:32,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:32,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:32,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:36,724 INFO L129 PetriNetUnfolder]: 1406/4370 cut-off events. [2022-07-21 09:14:36,724 INFO L130 PetriNetUnfolder]: For 194607/194607 co-relation queries the response was YES. [2022-07-21 09:14:36,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49433 conditions, 4370 events. 1406/4370 cut-off events. For 194607/194607 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41410 event pairs, 76 based on Foata normal form. 5/4367 useless extension candidates. Maximal degree in co-relation 49271. Up to 1755 conditions per place. [2022-07-21 09:14:36,802 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 809 selfloop transitions, 1127 changer transitions 32/2009 dead transitions. [2022-07-21 09:14:36,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 2009 transitions, 61491 flow [2022-07-21 09:14:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 09:14:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-21 09:14:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2703 transitions. [2022-07-21 09:14:36,804 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6414333175130518 [2022-07-21 09:14:36,805 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2703 transitions. [2022-07-21 09:14:36,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2703 transitions. [2022-07-21 09:14:36,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:36,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2703 transitions. [2022-07-21 09:14:36,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.16326530612245) internal successors, (2703), 49 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:36,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:36,810 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:36,811 INFO L186 Difference]: Start difference. First operand has 691 places, 1514 transitions, 43095 flow. Second operand 49 states and 2703 transitions. [2022-07-21 09:14:36,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 2009 transitions, 61491 flow [2022-07-21 09:14:38,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 2009 transitions, 61258 flow, removed 106 selfloop flow, removed 2 redundant places. [2022-07-21 09:14:38,555 INFO L242 Difference]: Finished difference. Result has 773 places, 1870 transitions, 59331 flow [2022-07-21 09:14:38,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=43050, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=59331, PETRI_PLACES=773, PETRI_TRANSITIONS=1870} [2022-07-21 09:14:38,557 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 697 predicate places. [2022-07-21 09:14:38,557 INFO L495 AbstractCegarLoop]: Abstraction has has 773 places, 1870 transitions, 59331 flow [2022-07-21 09:14:38,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:38,557 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:38,557 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] [2022-07-21 09:14:38,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 09:14:38,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:38,758 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1420095517, now seen corresponding path program 18 times [2022-07-21 09:14:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:38,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976875438] [2022-07-21 09:14:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:38,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976875438] [2022-07-21 09:14:38,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976875438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373362801] [2022-07-21 09:14:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:14:38,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:38,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:38,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:14:38,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:14:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:39,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:39,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373362801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:39,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:39,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:14:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696929409] [2022-07-21 09:14:39,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:39,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:14:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:14:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:14:39,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:39,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 1870 transitions, 59331 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:39,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:39,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:39,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:45,349 INFO L129 PetriNetUnfolder]: 1631/5089 cut-off events. [2022-07-21 09:14:45,349 INFO L130 PetriNetUnfolder]: For 259549/259561 co-relation queries the response was YES. [2022-07-21 09:14:45,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62648 conditions, 5089 events. 1631/5089 cut-off events. For 259549/259561 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49827 event pairs, 90 based on Foata normal form. 11/5092 useless extension candidates. Maximal degree in co-relation 62450. Up to 1815 conditions per place. [2022-07-21 09:14:45,465 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 849 selfloop transitions, 1411 changer transitions 33/2334 dead transitions. [2022-07-21 09:14:45,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 2334 transitions, 78344 flow [2022-07-21 09:14:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 09:14:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-21 09:14:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3567 transitions. [2022-07-21 09:14:45,468 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6381037567084079 [2022-07-21 09:14:45,468 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3567 transitions. [2022-07-21 09:14:45,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3567 transitions. [2022-07-21 09:14:45,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:45,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3567 transitions. [2022-07-21 09:14:45,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.87692307692308) internal successors, (3567), 65 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:45,477 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:45,477 INFO L186 Difference]: Start difference. First operand has 773 places, 1870 transitions, 59331 flow. Second operand 65 states and 3567 transitions. [2022-07-21 09:14:45,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 2334 transitions, 78344 flow [2022-07-21 09:14:48,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 2334 transitions, 77815 flow, removed 258 selfloop flow, removed 12 redundant places. [2022-07-21 09:14:48,184 INFO L242 Difference]: Finished difference. Result has 848 places, 2191 transitions, 76007 flow [2022-07-21 09:14:48,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=58949, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=76007, PETRI_PLACES=848, PETRI_TRANSITIONS=2191} [2022-07-21 09:14:48,187 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 772 predicate places. [2022-07-21 09:14:48,187 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 2191 transitions, 76007 flow [2022-07-21 09:14:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:48,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:48,187 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] [2022-07-21 09:14:48,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:48,397 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1159818561, now seen corresponding path program 19 times [2022-07-21 09:14:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98823635] [2022-07-21 09:14:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:48,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:48,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98823635] [2022-07-21 09:14:48,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98823635] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:48,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501096114] [2022-07-21 09:14:48,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:14:48,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:48,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:48,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:48,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:14:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:48,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:49,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501096114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:49,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:49,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:14:49,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478460166] [2022-07-21 09:14:49,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:49,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:14:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:14:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:14:49,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:14:49,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 2191 transitions, 76007 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:49,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:49,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:14:49,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:55,190 INFO L129 PetriNetUnfolder]: 1676/5310 cut-off events. [2022-07-21 09:14:55,190 INFO L130 PetriNetUnfolder]: For 334963/334968 co-relation queries the response was YES. [2022-07-21 09:14:55,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69593 conditions, 5310 events. 1676/5310 cut-off events. For 334963/334968 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 52591 event pairs, 81 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 69372. Up to 1696 conditions per place. [2022-07-21 09:14:55,548 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 893 selfloop transitions, 1476 changer transitions 53/2463 dead transitions. [2022-07-21 09:14:55,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 2463 transitions, 89191 flow [2022-07-21 09:14:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:14:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:14:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3353 transitions. [2022-07-21 09:14:55,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6391536408692337 [2022-07-21 09:14:55,551 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3353 transitions. [2022-07-21 09:14:55,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3353 transitions. [2022-07-21 09:14:55,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:55,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3353 transitions. [2022-07-21 09:14:55,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.967213114754095) internal successors, (3353), 61 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:55,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:55,559 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:55,559 INFO L186 Difference]: Start difference. First operand has 848 places, 2191 transitions, 76007 flow. Second operand 61 states and 3353 transitions. [2022-07-21 09:14:55,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 2463 transitions, 89191 flow [2022-07-21 09:14:58,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2463 transitions, 88209 flow, removed 443 selfloop flow, removed 12 redundant places. [2022-07-21 09:14:58,984 INFO L242 Difference]: Finished difference. Result has 908 places, 2297 transitions, 84757 flow [2022-07-21 09:14:58,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=75207, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=84757, PETRI_PLACES=908, PETRI_TRANSITIONS=2297} [2022-07-21 09:14:58,986 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 832 predicate places. [2022-07-21 09:14:58,986 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 2297 transitions, 84757 flow [2022-07-21 09:14:58,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:58,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:58,987 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] [2022-07-21 09:14:59,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-21 09:14:59,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:59,188 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:59,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1306414141, now seen corresponding path program 20 times [2022-07-21 09:14:59,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:59,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769815760] [2022-07-21 09:14:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:59,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769815760] [2022-07-21 09:14:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769815760] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157182418] [2022-07-21 09:14:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:14:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:59,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:59,388 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:59,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:14:59,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:14:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:14:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:59,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:00,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157182418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:00,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:00,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-21 09:15:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718622431] [2022-07-21 09:15:00,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 09:15:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 09:15:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:15:00,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:15:00,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 2297 transitions, 84757 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:00,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:00,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:15:00,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:08,101 INFO L129 PetriNetUnfolder]: 1701/5368 cut-off events. [2022-07-21 09:15:08,101 INFO L130 PetriNetUnfolder]: For 372076/372088 co-relation queries the response was YES. [2022-07-21 09:15:08,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74181 conditions, 5368 events. 1701/5368 cut-off events. For 372076/372088 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 53175 event pairs, 87 based on Foata normal form. 9/5358 useless extension candidates. Maximal degree in co-relation 73948. Up to 2260 conditions per place. [2022-07-21 09:15:08,324 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1050 selfloop transitions, 1478 changer transitions 24/2593 dead transitions. [2022-07-21 09:15:08,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 2593 transitions, 99038 flow [2022-07-21 09:15:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 09:15:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-21 09:15:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4001 transitions. [2022-07-21 09:15:08,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373048741637464 [2022-07-21 09:15:08,328 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4001 transitions. [2022-07-21 09:15:08,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4001 transitions. [2022-07-21 09:15:08,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:08,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4001 transitions. [2022-07-21 09:15:08,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 54.80821917808219) internal successors, (4001), 73 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:08,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:08,339 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:08,339 INFO L186 Difference]: Start difference. First operand has 908 places, 2297 transitions, 84757 flow. Second operand 73 states and 4001 transitions. [2022-07-21 09:15:08,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 2593 transitions, 99038 flow [2022-07-21 09:15:12,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 941 places, 2593 transitions, 97949 flow, removed 423 selfloop flow, removed 29 redundant places. [2022-07-21 09:15:12,320 INFO L242 Difference]: Finished difference. Result has 971 places, 2474 transitions, 95826 flow [2022-07-21 09:15:12,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=84095, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=95826, PETRI_PLACES=971, PETRI_TRANSITIONS=2474} [2022-07-21 09:15:12,322 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 895 predicate places. [2022-07-21 09:15:12,322 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 2474 transitions, 95826 flow [2022-07-21 09:15:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:12,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:12,323 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] [2022-07-21 09:15:12,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-21 09:15:12,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 09:15:12,523 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589707, now seen corresponding path program 21 times [2022-07-21 09:15:12,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:12,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681353817] [2022-07-21 09:15:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:12,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:12,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:12,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681353817] [2022-07-21 09:15:12,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681353817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:12,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965406707] [2022-07-21 09:15:12,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:15:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:12,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:12,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:15:12,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:15:12,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:15:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:13,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:13,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965406707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:13,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:13,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:15:13,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106702106] [2022-07-21 09:15:13,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:13,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:15:13,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:15:13,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:15:13,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:15:13,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 2474 transitions, 95826 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:13,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:13,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:15:13,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:23,243 INFO L129 PetriNetUnfolder]: 1920/6029 cut-off events. [2022-07-21 09:15:23,243 INFO L130 PetriNetUnfolder]: For 488353/488358 co-relation queries the response was YES. [2022-07-21 09:15:23,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87935 conditions, 6029 events. 1920/6029 cut-off events. For 488353/488358 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60995 event pairs, 88 based on Foata normal form. 8/6018 useless extension candidates. Maximal degree in co-relation 87697. Up to 2325 conditions per place. [2022-07-21 09:15:23,390 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1171 selfloop transitions, 1743 changer transitions 19/2974 dead transitions. [2022-07-21 09:15:23,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 2974 transitions, 120126 flow [2022-07-21 09:15:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-21 09:15:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-07-21 09:15:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4694 transitions. [2022-07-21 09:15:23,394 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6346673877771769 [2022-07-21 09:15:23,394 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4694 transitions. [2022-07-21 09:15:23,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4694 transitions. [2022-07-21 09:15:23,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:23,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4694 transitions. [2022-07-21 09:15:23,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 54.58139534883721) internal successors, (4694), 86 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:23,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:23,404 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:23,404 INFO L186 Difference]: Start difference. First operand has 971 places, 2474 transitions, 95826 flow. Second operand 86 states and 4694 transitions. [2022-07-21 09:15:23,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 2974 transitions, 120126 flow [2022-07-21 09:15:28,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1014 places, 2974 transitions, 117968 flow, removed 979 selfloop flow, removed 32 redundant places. [2022-07-21 09:15:28,488 INFO L242 Difference]: Finished difference. Result has 1061 places, 2836 transitions, 116241 flow [2022-07-21 09:15:28,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=94873, PETRI_DIFFERENCE_MINUEND_PLACES=929, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=116241, PETRI_PLACES=1061, PETRI_TRANSITIONS=2836} [2022-07-21 09:15:28,491 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 985 predicate places. [2022-07-21 09:15:28,491 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 2836 transitions, 116241 flow [2022-07-21 09:15:28,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:28,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:28,491 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] [2022-07-21 09:15:28,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:28,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 09:15:28,692 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1606411847, now seen corresponding path program 22 times [2022-07-21 09:15:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717995662] [2022-07-21 09:15:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717995662] [2022-07-21 09:15:28,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717995662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476083289] [2022-07-21 09:15:28,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:15:28,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:28,925 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:28,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 09:15:28,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:15:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:15:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:29,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:29,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476083289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:29,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:29,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:15:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868556234] [2022-07-21 09:15:29,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:29,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:15:29,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:15:29,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:15:29,630 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:15:29,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 2836 transitions, 116241 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:29,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:29,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:15:29,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:38,155 INFO L129 PetriNetUnfolder]: 1965/6117 cut-off events. [2022-07-21 09:15:38,156 INFO L130 PetriNetUnfolder]: For 518413/518425 co-relation queries the response was YES. [2022-07-21 09:15:38,388 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93511 conditions, 6117 events. 1965/6117 cut-off events. For 518413/518425 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61774 event pairs, 90 based on Foata normal form. 11/6108 useless extension candidates. Maximal degree in co-relation 93236. Up to 2253 conditions per place. [2022-07-21 09:15:38,439 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1204 selfloop transitions, 1743 changer transitions 37/3025 dead transitions. [2022-07-21 09:15:38,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 3025 transitions, 128570 flow [2022-07-21 09:15:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 09:15:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-21 09:15:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3662 transitions. [2022-07-21 09:15:38,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6355432141617494 [2022-07-21 09:15:38,446 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3662 transitions. [2022-07-21 09:15:38,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3662 transitions. [2022-07-21 09:15:38,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:38,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3662 transitions. [2022-07-21 09:15:38,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 54.656716417910445) internal successors, (3662), 67 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:38,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:38,453 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:38,454 INFO L186 Difference]: Start difference. First operand has 1061 places, 2836 transitions, 116241 flow. Second operand 67 states and 3662 transitions. [2022-07-21 09:15:38,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 3025 transitions, 128570 flow [2022-07-21 09:15:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1091 places, 3025 transitions, 125655 flow, removed 1221 selfloop flow, removed 27 redundant places. [2022-07-21 09:15:45,502 INFO L242 Difference]: Finished difference. Result has 1117 places, 2896 transitions, 123291 flow [2022-07-21 09:15:45,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=113944, PETRI_DIFFERENCE_MINUEND_PLACES=1025, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=123291, PETRI_PLACES=1117, PETRI_TRANSITIONS=2896} [2022-07-21 09:15:45,505 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1041 predicate places. [2022-07-21 09:15:45,505 INFO L495 AbstractCegarLoop]: Abstraction has has 1117 places, 2896 transitions, 123291 flow [2022-07-21 09:15:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:45,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:45,505 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] [2022-07-21 09:15:45,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-21 09:15:45,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:45,706 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:45,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1025476009, now seen corresponding path program 23 times [2022-07-21 09:15:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:45,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783819733] [2022-07-21 09:15:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:45,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:45,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783819733] [2022-07-21 09:15:45,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783819733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584994929] [2022-07-21 09:15:45,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:15:45,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:45,949 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:45,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 09:15:46,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:15:46,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:15:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:46,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:46,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584994929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:46,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:46,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:15:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983444664] [2022-07-21 09:15:46,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:46,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:15:46,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:15:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:15:46,575 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:15:46,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1117 places, 2896 transitions, 123291 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:46,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:46,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:15:46,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:54,754 INFO L129 PetriNetUnfolder]: 2023/6196 cut-off events. [2022-07-21 09:15:54,754 INFO L130 PetriNetUnfolder]: For 484548/484553 co-relation queries the response was YES. [2022-07-21 09:15:54,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97048 conditions, 6196 events. 2023/6196 cut-off events. For 484548/484553 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 62412 event pairs, 91 based on Foata normal form. 5/6182 useless extension candidates. Maximal degree in co-relation 96761. Up to 2709 conditions per place. [2022-07-21 09:15:54,932 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1426 selfloop transitions, 1616 changer transitions 8/3091 dead transitions. [2022-07-21 09:15:54,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 3091 transitions, 136138 flow [2022-07-21 09:15:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:15:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:15:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1986 transitions. [2022-07-21 09:15:54,934 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6414728682170543 [2022-07-21 09:15:54,935 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1986 transitions. [2022-07-21 09:15:54,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1986 transitions. [2022-07-21 09:15:54,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:54,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1986 transitions. [2022-07-21 09:15:54,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.166666666666664) internal successors, (1986), 36 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:54,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:54,939 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:54,940 INFO L186 Difference]: Start difference. First operand has 1117 places, 2896 transitions, 123291 flow. Second operand 36 states and 1986 transitions. [2022-07-21 09:15:54,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1137 places, 3091 transitions, 136138 flow [2022-07-21 09:16:01,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1103 places, 3091 transitions, 135349 flow, removed 91 selfloop flow, removed 34 redundant places. [2022-07-21 09:16:01,429 INFO L242 Difference]: Finished difference. Result has 1112 places, 2971 transitions, 129492 flow [2022-07-21 09:16:01,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=122623, PETRI_DIFFERENCE_MINUEND_PLACES=1068, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=129492, PETRI_PLACES=1112, PETRI_TRANSITIONS=2971} [2022-07-21 09:16:01,433 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1036 predicate places. [2022-07-21 09:16:01,433 INFO L495 AbstractCegarLoop]: Abstraction has has 1112 places, 2971 transitions, 129492 flow [2022-07-21 09:16:01,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:01,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:01,434 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] [2022-07-21 09:16:01,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:01,647 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1707648643, now seen corresponding path program 24 times [2022-07-21 09:16:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376487741] [2022-07-21 09:16:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:01,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376487741] [2022-07-21 09:16:01,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376487741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821326329] [2022-07-21 09:16:01,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:16:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:01,852 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:01,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 09:16:01,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:16:01,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:01,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:16:01,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:02,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:02,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821326329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:02,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:02,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:16:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624773966] [2022-07-21 09:16:02,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:02,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:16:02,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:16:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:16:02,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:16:02,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1112 places, 2971 transitions, 129492 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:02,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:02,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:16:02,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:12,663 INFO L129 PetriNetUnfolder]: 2100/6439 cut-off events. [2022-07-21 09:16:12,663 INFO L130 PetriNetUnfolder]: For 527383/527395 co-relation queries the response was YES. [2022-07-21 09:16:12,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102412 conditions, 6439 events. 2100/6439 cut-off events. For 527383/527395 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 65284 event pairs, 77 based on Foata normal form. 7/6426 useless extension candidates. Maximal degree in co-relation 102126. Up to 1857 conditions per place. [2022-07-21 09:16:12,850 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1368 selfloop transitions, 1814 changer transitions 12/3235 dead transitions. [2022-07-21 09:16:12,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 3235 transitions, 146186 flow [2022-07-21 09:16:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-21 09:16:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-07-21 09:16:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4154 transitions. [2022-07-21 09:16:12,853 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6355569155446756 [2022-07-21 09:16:12,853 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4154 transitions. [2022-07-21 09:16:12,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4154 transitions. [2022-07-21 09:16:12,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:12,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4154 transitions. [2022-07-21 09:16:12,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.6578947368421) internal successors, (4154), 76 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:12,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:12,859 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:12,859 INFO L186 Difference]: Start difference. First operand has 1112 places, 2971 transitions, 129492 flow. Second operand 76 states and 4154 transitions. [2022-07-21 09:16:12,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1184 places, 3235 transitions, 146186 flow [2022-07-21 09:16:19,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1167 places, 3235 transitions, 145752 flow, removed 70 selfloop flow, removed 17 redundant places. [2022-07-21 09:16:19,945 INFO L242 Difference]: Finished difference. Result has 1191 places, 3109 transitions, 141016 flow [2022-07-21 09:16:19,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=129088, PETRI_DIFFERENCE_MINUEND_PLACES=1092, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=141016, PETRI_PLACES=1191, PETRI_TRANSITIONS=3109} [2022-07-21 09:16:19,948 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1115 predicate places. [2022-07-21 09:16:19,948 INFO L495 AbstractCegarLoop]: Abstraction has has 1191 places, 3109 transitions, 141016 flow [2022-07-21 09:16:19,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:19,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:19,948 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] [2022-07-21 09:16:19,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:20,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 09:16:20,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 391613489, now seen corresponding path program 25 times [2022-07-21 09:16:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144586640] [2022-07-21 09:16:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144586640] [2022-07-21 09:16:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144586640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701079593] [2022-07-21 09:16:20,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:16:20,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:20,340 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:20,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 09:16:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:20,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:16:20,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:20,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:21,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701079593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:21,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:21,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:16:21,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17743936] [2022-07-21 09:16:21,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:21,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:16:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:16:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:16:21,127 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:16:21,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1191 places, 3109 transitions, 141016 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:21,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:16:21,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:32,706 INFO L129 PetriNetUnfolder]: 2100/6437 cut-off events. [2022-07-21 09:16:32,706 INFO L130 PetriNetUnfolder]: For 614118/614130 co-relation queries the response was YES. [2022-07-21 09:16:32,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107011 conditions, 6437 events. 2100/6437 cut-off events. For 614118/614130 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 65343 event pairs, 81 based on Foata normal form. 9/6430 useless extension candidates. Maximal degree in co-relation 106707. Up to 1893 conditions per place. [2022-07-21 09:16:32,908 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1060 selfloop transitions, 2089 changer transitions 21/3211 dead transitions. [2022-07-21 09:16:32,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1255 places, 3211 transitions, 150677 flow [2022-07-21 09:16:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 09:16:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-21 09:16:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3882 transitions. [2022-07-21 09:16:32,912 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6357680969538159 [2022-07-21 09:16:32,912 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3882 transitions. [2022-07-21 09:16:32,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3882 transitions. [2022-07-21 09:16:32,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:32,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3882 transitions. [2022-07-21 09:16:32,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 54.67605633802817) internal successors, (3882), 71 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:32,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:32,921 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:32,921 INFO L186 Difference]: Start difference. First operand has 1191 places, 3109 transitions, 141016 flow. Second operand 71 states and 3882 transitions. [2022-07-21 09:16:32,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1255 places, 3211 transitions, 150677 flow [2022-07-21 09:16:41,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1222 places, 3211 transitions, 148588 flow, removed 848 selfloop flow, removed 33 redundant places. [2022-07-21 09:16:41,821 INFO L242 Difference]: Finished difference. Result has 1229 places, 3107 transitions, 143510 flow [2022-07-21 09:16:41,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=139132, PETRI_DIFFERENCE_MINUEND_PLACES=1152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=143510, PETRI_PLACES=1229, PETRI_TRANSITIONS=3107} [2022-07-21 09:16:41,824 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1153 predicate places. [2022-07-21 09:16:41,824 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 3107 transitions, 143510 flow [2022-07-21 09:16:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:41,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:41,825 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] [2022-07-21 09:16:41,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 09:16:42,029 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1193111131, now seen corresponding path program 26 times [2022-07-21 09:16:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853606460] [2022-07-21 09:16:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:42,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:42,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853606460] [2022-07-21 09:16:42,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853606460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:42,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481117948] [2022-07-21 09:16:42,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:16:42,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:42,225 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:42,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 09:16:42,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:16:42,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:16:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:42,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:42,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481117948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:42,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:42,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:16:42,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693617020] [2022-07-21 09:16:42,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:42,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:16:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:16:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:16:42,892 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:16:42,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 3107 transitions, 143510 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:42,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:42,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:16:42,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:52,888 INFO L129 PetriNetUnfolder]: 2161/6543 cut-off events. [2022-07-21 09:16:52,888 INFO L130 PetriNetUnfolder]: For 633051/633056 co-relation queries the response was YES. [2022-07-21 09:16:53,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111366 conditions, 6543 events. 2161/6543 cut-off events. For 633051/633056 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66248 event pairs, 87 based on Foata normal form. 6/6529 useless extension candidates. Maximal degree in co-relation 111065. Up to 3000 conditions per place. [2022-07-21 09:16:53,083 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1281 selfloop transitions, 2038 changer transitions 12/3372 dead transitions. [2022-07-21 09:16:53,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1271 places, 3372 transitions, 159103 flow [2022-07-21 09:16:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 09:16:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-21 09:16:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3012 transitions. [2022-07-21 09:16:53,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6367864693446089 [2022-07-21 09:16:53,085 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3012 transitions. [2022-07-21 09:16:53,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3012 transitions. [2022-07-21 09:16:53,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:53,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3012 transitions. [2022-07-21 09:16:53,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 54.763636363636365) internal successors, (3012), 55 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:53,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:53,090 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:53,090 INFO L186 Difference]: Start difference. First operand has 1229 places, 3107 transitions, 143510 flow. Second operand 55 states and 3012 transitions. [2022-07-21 09:16:53,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1271 places, 3372 transitions, 159103 flow [2022-07-21 09:17:01,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1217 places, 3372 transitions, 156223 flow, removed 154 selfloop flow, removed 54 redundant places. [2022-07-21 09:17:01,949 INFO L242 Difference]: Finished difference. Result has 1238 places, 3279 transitions, 153027 flow [2022-07-21 09:17:01,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=140798, PETRI_DIFFERENCE_MINUEND_PLACES=1163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1880, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=153027, PETRI_PLACES=1238, PETRI_TRANSITIONS=3279} [2022-07-21 09:17:01,952 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1162 predicate places. [2022-07-21 09:17:01,952 INFO L495 AbstractCegarLoop]: Abstraction has has 1238 places, 3279 transitions, 153027 flow [2022-07-21 09:17:01,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:01,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:01,953 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] [2022-07-21 09:17:01,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 09:17:02,157 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1442126069, now seen corresponding path program 27 times [2022-07-21 09:17:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449758710] [2022-07-21 09:17:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:02,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:02,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449758710] [2022-07-21 09:17:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449758710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:02,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488084155] [2022-07-21 09:17:02,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:17:02,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:02,364 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:17:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 09:17:02,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:17:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:02,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:17:02,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:02,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:02,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488084155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:02,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:02,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-21 09:17:02,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858837624] [2022-07-21 09:17:02,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:02,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:17:02,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:17:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:17:02,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-21 09:17:02,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1238 places, 3279 transitions, 153027 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:02,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:02,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-21 09:17:02,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand