./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-more-queue-add-2-nl.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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:16:59,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:16:59,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:16:59,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:16:59,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:16:59,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:16:59,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:16:59,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:16:59,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:16:59,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:16:59,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:16:59,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:16:59,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:16:59,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:16:59,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:16:59,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:16:59,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:16:59,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:16:59,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:16:59,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:16:59,876 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:16:59,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:16:59,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:16:59,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:16:59,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:16:59,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:16:59,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:16:59,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:16:59,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:16:59,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:16:59,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:16:59,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:16:59,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:16:59,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:16:59,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:16:59,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:16:59,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:16:59,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:16:59,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:16:59,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:16:59,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:16:59,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:16:59,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:16:59,934 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:16:59,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:16:59,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:16:59,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:16:59,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:16:59,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:16:59,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:16:59,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:16:59,937 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:16:59,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:16:59,938 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:16:59,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:16:59,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:16:59,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:16:59,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:16:59,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:16:59,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:16:59,939 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:16:59,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:16:59,940 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:16:59,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:16:59,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:16:59,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:16:59,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:16:59,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:16:59,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:16:59,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:16:59,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:16:59,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:16:59,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:16:59,942 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:16:59,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:16:59,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:16:59,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-07-13 22:17:00,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:17:00,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:17:00,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:17:00,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:17:00,207 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:17:00,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-07-13 22:17:00,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2af965945/da368693c49b4d42acf3a2681c3e2af9/FLAG65b425548 [2022-07-13 22:17:00,583 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:17:00,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-07-13 22:17:00,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2af965945/da368693c49b4d42acf3a2681c3e2af9/FLAG65b425548 [2022-07-13 22:17:01,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2af965945/da368693c49b4d42acf3a2681c3e2af9 [2022-07-13 22:17:01,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:17:01,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:17:01,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:17:01,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:17:01,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:17:01,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@add3077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01, skipping insertion in model container [2022-07-13 22:17:01,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:17:01,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:17:01,205 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-more-queue-add-2-nl.wvr.c[2870,2883] [2022-07-13 22:17:01,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:17:01,217 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:17:01,237 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-more-queue-add-2-nl.wvr.c[2870,2883] [2022-07-13 22:17:01,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:17:01,251 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:17:01,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01 WrapperNode [2022-07-13 22:17:01,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:17:01,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:17:01,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:17:01,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:17:01,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,286 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-07-13 22:17:01,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:17:01,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:17:01,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:17:01,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:17:01,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:17:01,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:17:01,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:17:01,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:17:01,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (1/1) ... [2022-07-13 22:17:01,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:17:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:01,344 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) [2022-07-13 22:17:01,362 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 [2022-07-13 22:17:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:17:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:17:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:17:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:17:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:17:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:17:01,394 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:17:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:17:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:17:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:17:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:17:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:17:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:17:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:17:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:17:01,397 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:17:01,465 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:17:01,466 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:17:01,746 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:17:01,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:17:01,846 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:17:01,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:17:01 BoogieIcfgContainer [2022-07-13 22:17:01,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:17:01,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:17:01,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:17:01,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:17:01,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:17:01" (1/3) ... [2022-07-13 22:17:01,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331476d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:17:01, skipping insertion in model container [2022-07-13 22:17:01,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:17:01" (2/3) ... [2022-07-13 22:17:01,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331476d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:17:01, skipping insertion in model container [2022-07-13 22:17:01,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:17:01" (3/3) ... [2022-07-13 22:17:01,864 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-07-13 22:17:01,869 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:17:01,878 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:17:01,878 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:17:01,878 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:17:01,942 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:17:01,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-07-13 22:17:02,073 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2022-07-13 22:17:02,073 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:17:02,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-07-13 22:17:02,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-07-13 22:17:02,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-07-13 22:17:02,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:17:02,102 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@e80be62, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a77ef71 [2022-07-13 22:17:02,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:17:02,129 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2022-07-13 22:17:02,130 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:17:02,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:02,131 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:02,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2022-07-13 22:17:02,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:02,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239709654] [2022-07-13 22:17:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:02,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:02,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:02,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239709654] [2022-07-13 22:17:02,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239709654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:02,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:02,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:17:02,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451466063] [2022-07-13 22:17:02,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:17:02,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:17:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:17:02,429 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2022-07-13 22:17:02,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:02,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2022-07-13 22:17:02,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:02,508 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2022-07-13 22:17:02,509 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-13 22:17:02,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2022-07-13 22:17:02,513 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2022-07-13 22:17:02,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2022-07-13 22:17:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:17:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:17:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-13 22:17:02,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2022-07-13 22:17:02,532 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-13 22:17:02,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-13 22:17:02,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:02,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-13 22:17:02,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,553 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,555 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2022-07-13 22:17:02,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2022-07-13 22:17:02,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:17:02,564 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2022-07-13 22:17:02,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2022-07-13 22:17:02,569 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2022-07-13 22:17:02,570 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2022-07-13 22:17:02,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,570 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:02,570 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:02,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:17:02,571 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1538584147, now seen corresponding path program 1 times [2022-07-13 22:17:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940902742] [2022-07-13 22:17:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:02,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940902742] [2022-07-13 22:17:02,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940902742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:02,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:02,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:17:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154843762] [2022-07-13 22:17:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:02,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:17:02,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:17:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:17:02,755 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2022-07-13 22:17:02,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:02,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2022-07-13 22:17:02,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:02,870 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2022-07-13 22:17:02,871 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:17:02,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 277 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2022-07-13 22:17:02,872 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2022-07-13 22:17:02,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2022-07-13 22:17:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:17:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:17:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2022-07-13 22:17:02,875 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2022-07-13 22:17:02,875 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2022-07-13 22:17:02,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2022-07-13 22:17:02,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:02,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2022-07-13 22:17:02,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,883 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,883 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2022-07-13 22:17:02,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2022-07-13 22:17:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:17:02,887 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2022-07-13 22:17:02,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2022-07-13 22:17:02,888 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2022-07-13 22:17:02,888 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2022-07-13 22:17:02,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:02,889 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:02,889 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:02,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:17:02,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2022-07-13 22:17:02,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:02,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284247014] [2022-07-13 22:17:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:02,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:03,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:03,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284247014] [2022-07-13 22:17:03,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284247014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:03,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:03,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:17:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314524039] [2022-07-13 22:17:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:03,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:17:03,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:17:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:17:03,049 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2022-07-13 22:17:03,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:03,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:03,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2022-07-13 22:17:03,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:03,087 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2022-07-13 22:17:03,087 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 22:17:03,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 163 events. 12/163 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 213. Up to 22 conditions per place. [2022-07-13 22:17:03,090 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 11 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2022-07-13 22:17:03,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 313 flow [2022-07-13 22:17:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:17:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:17:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-07-13 22:17:03,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2022-07-13 22:17:03,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-07-13 22:17:03,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-07-13 22:17:03,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:03,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-07-13 22:17:03,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:03,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:03,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:03,100 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 390 transitions. [2022-07-13 22:17:03,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 313 flow [2022-07-13 22:17:03,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:17:03,107 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 287 flow [2022-07-13 22:17:03,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2022-07-13 22:17:03,109 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2022-07-13 22:17:03,109 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 287 flow [2022-07-13 22:17:03,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:03,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:03,110 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:03,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:17:03,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2022-07-13 22:17:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:03,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709948822] [2022-07-13 22:17:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:03,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709948822] [2022-07-13 22:17:03,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709948822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:03,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:03,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479414051] [2022-07-13 22:17:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:03,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:03,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:03,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:03,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 287 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:03,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:03,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:03,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:04,209 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2022-07-13 22:17:04,209 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-07-13 22:17:04,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 413 events. 120/413 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1605 event pairs, 19 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 800. Up to 174 conditions per place. [2022-07-13 22:17:04,225 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2022-07-13 22:17:04,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 598 flow [2022-07-13 22:17:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:17:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 22:17:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2022-07-13 22:17:04,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2022-07-13 22:17:04,230 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2022-07-13 22:17:04,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2022-07-13 22:17:04,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:04,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2022-07-13 22:17:04,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:04,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:04,244 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:04,244 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 287 flow. Second operand 17 states and 1605 transitions. [2022-07-13 22:17:04,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 598 flow [2022-07-13 22:17:04,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 570 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-07-13 22:17:04,253 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 391 flow [2022-07-13 22:17:04,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=391, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2022-07-13 22:17:04,255 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2022-07-13 22:17:04,259 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 391 flow [2022-07-13 22:17:04,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:04,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:04,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:17:04,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash -190163016, now seen corresponding path program 3 times [2022-07-13 22:17:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362398629] [2022-07-13 22:17:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:04,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:04,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:04,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362398629] [2022-07-13 22:17:04,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362398629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:04,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:04,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:04,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194320380] [2022-07-13 22:17:04,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:04,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:04,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:04,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:04,815 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:04,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:04,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:04,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:04,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:05,316 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2022-07-13 22:17:05,317 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-07-13 22:17:05,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2193 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1051. Up to 172 conditions per place. [2022-07-13 22:17:05,322 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2022-07-13 22:17:05,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 751 flow [2022-07-13 22:17:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 22:17:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 22:17:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2022-07-13 22:17:05,327 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-07-13 22:17:05,328 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2022-07-13 22:17:05,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2022-07-13 22:17:05,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:05,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2022-07-13 22:17:05,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:05,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:05,337 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:05,338 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 391 flow. Second operand 18 states and 1701 transitions. [2022-07-13 22:17:05,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 751 flow [2022-07-13 22:17:05,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 731 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-07-13 22:17:05,347 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 478 flow [2022-07-13 22:17:05,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2022-07-13 22:17:05,350 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2022-07-13 22:17:05,350 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 478 flow [2022-07-13 22:17:05,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:05,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:05,352 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:05,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:17:05,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1275484174, now seen corresponding path program 4 times [2022-07-13 22:17:05,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:05,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576517185] [2022-07-13 22:17:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:05,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:05,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576517185] [2022-07-13 22:17:05,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576517185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:05,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:05,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923145137] [2022-07-13 22:17:05,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:05,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:05,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:05,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:05,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:05,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:05,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 478 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:05,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:05,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:05,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:06,236 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2022-07-13 22:17:06,237 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2022-07-13 22:17:06,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2510 event pairs, 46 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 1319. Up to 229 conditions per place. [2022-07-13 22:17:06,242 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2022-07-13 22:17:06,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 897 flow [2022-07-13 22:17:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2022-07-13 22:17:06,247 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2022-07-13 22:17:06,248 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2022-07-13 22:17:06,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2022-07-13 22:17:06,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:06,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2022-07-13 22:17:06,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:06,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:06,257 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:06,257 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 478 flow. Second operand 16 states and 1517 transitions. [2022-07-13 22:17:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 897 flow [2022-07-13 22:17:06,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 809 flow, removed 26 selfloop flow, removed 12 redundant places. [2022-07-13 22:17:06,264 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 611 flow [2022-07-13 22:17:06,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=611, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2022-07-13 22:17:06,265 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2022-07-13 22:17:06,265 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 611 flow [2022-07-13 22:17:06,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:06,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:06,267 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:06,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:17:06,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash 590353226, now seen corresponding path program 5 times [2022-07-13 22:17:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:06,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961281715] [2022-07-13 22:17:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:06,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:06,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961281715] [2022-07-13 22:17:06,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961281715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:06,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:06,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:06,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789868653] [2022-07-13 22:17:06,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:06,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:06,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:06,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 611 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:06,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:06,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:06,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:06,982 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2022-07-13 22:17:06,982 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2022-07-13 22:17:06,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2727 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1504. Up to 241 conditions per place. [2022-07-13 22:17:06,987 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2022-07-13 22:17:06,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1073 flow [2022-07-13 22:17:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2022-07-13 22:17:06,992 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2022-07-13 22:17:06,992 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2022-07-13 22:17:06,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2022-07-13 22:17:06,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:06,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2022-07-13 22:17:06,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:06,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,000 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,000 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 611 flow. Second operand 16 states and 1519 transitions. [2022-07-13 22:17:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1073 flow [2022-07-13 22:17:07,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1012 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-07-13 22:17:07,008 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 811 flow [2022-07-13 22:17:07,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=811, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2022-07-13 22:17:07,009 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2022-07-13 22:17:07,009 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 811 flow [2022-07-13 22:17:07,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,010 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:07,010 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:07,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:17:07,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash -739549564, now seen corresponding path program 6 times [2022-07-13 22:17:07,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:07,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863201397] [2022-07-13 22:17:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:07,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:07,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:07,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863201397] [2022-07-13 22:17:07,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863201397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:07,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:07,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:07,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015083815] [2022-07-13 22:17:07,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:07,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:07,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 811 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:07,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:07,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:07,661 INFO L129 PetriNetUnfolder]: 146/545 cut-off events. [2022-07-13 22:17:07,661 INFO L130 PetriNetUnfolder]: For 1213/1213 co-relation queries the response was YES. [2022-07-13 22:17:07,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 545 events. 146/545 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2771 event pairs, 43 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 1650. Up to 255 conditions per place. [2022-07-13 22:17:07,667 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2022-07-13 22:17:07,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1182 flow [2022-07-13 22:17:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2022-07-13 22:17:07,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-07-13 22:17:07,671 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2022-07-13 22:17:07,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2022-07-13 22:17:07,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:07,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2022-07-13 22:17:07,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,680 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,680 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 811 flow. Second operand 16 states and 1512 transitions. [2022-07-13 22:17:07,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1182 flow [2022-07-13 22:17:07,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1101 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-07-13 22:17:07,690 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 828 flow [2022-07-13 22:17:07,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2022-07-13 22:17:07,691 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2022-07-13 22:17:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 828 flow [2022-07-13 22:17:07,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:07,692 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:07,692 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:17:07,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1259341386, now seen corresponding path program 7 times [2022-07-13 22:17:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664108283] [2022-07-13 22:17:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664108283] [2022-07-13 22:17:08,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664108283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:08,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:08,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726516178] [2022-07-13 22:17:08,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:08,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:08,090 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:08,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 828 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:08,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:08,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:08,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:08,442 INFO L129 PetriNetUnfolder]: 149/551 cut-off events. [2022-07-13 22:17:08,443 INFO L130 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2022-07-13 22:17:08,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1711 conditions, 551 events. 149/551 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2854 event pairs, 45 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1681. Up to 255 conditions per place. [2022-07-13 22:17:08,448 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2022-07-13 22:17:08,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1208 flow [2022-07-13 22:17:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-07-13 22:17:08,468 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-07-13 22:17:08,468 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-07-13 22:17:08,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-07-13 22:17:08,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:08,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-07-13 22:17:08,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:08,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:08,478 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:08,478 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 828 flow. Second operand 16 states and 1514 transitions. [2022-07-13 22:17:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1208 flow [2022-07-13 22:17:08,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1137 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-07-13 22:17:08,486 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 851 flow [2022-07-13 22:17:08,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=851, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2022-07-13 22:17:08,488 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2022-07-13 22:17:08,488 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 851 flow [2022-07-13 22:17:08,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:08,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:08,489 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:08,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:17:08,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash -677590396, now seen corresponding path program 8 times [2022-07-13 22:17:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075040700] [2022-07-13 22:17:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:08,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:08,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075040700] [2022-07-13 22:17:08,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075040700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:08,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:08,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:08,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309052238] [2022-07-13 22:17:08,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:08,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:08,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:08,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:08,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:08,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:09,312 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2022-07-13 22:17:09,312 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2022-07-13 22:17:09,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3054 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1783. Up to 247 conditions per place. [2022-07-13 22:17:09,318 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2022-07-13 22:17:09,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1281 flow [2022-07-13 22:17:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:17:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 22:17:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2022-07-13 22:17:09,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2022-07-13 22:17:09,326 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2022-07-13 22:17:09,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2022-07-13 22:17:09,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:09,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2022-07-13 22:17:09,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:09,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:09,335 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:09,335 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 851 flow. Second operand 17 states and 1607 transitions. [2022-07-13 22:17:09,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1281 flow [2022-07-13 22:17:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1197 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-13 22:17:09,345 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 904 flow [2022-07-13 22:17:09,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=904, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2022-07-13 22:17:09,346 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2022-07-13 22:17:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 904 flow [2022-07-13 22:17:09,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:09,347 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:09,348 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:09,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:17:09,348 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1724094068, now seen corresponding path program 9 times [2022-07-13 22:17:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:09,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464397289] [2022-07-13 22:17:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:09,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:09,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464397289] [2022-07-13 22:17:09,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464397289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:09,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:09,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684834985] [2022-07-13 22:17:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:09,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:09,631 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:09,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 904 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:09,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:09,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:09,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:10,010 INFO L129 PetriNetUnfolder]: 154/581 cut-off events. [2022-07-13 22:17:10,011 INFO L130 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2022-07-13 22:17:10,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 581 events. 154/581 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3133 event pairs, 53 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 1865. Up to 275 conditions per place. [2022-07-13 22:17:10,016 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2022-07-13 22:17:10,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1342 flow [2022-07-13 22:17:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-07-13 22:17:10,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-07-13 22:17:10,019 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-07-13 22:17:10,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-07-13 22:17:10,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:10,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-07-13 22:17:10,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,025 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,025 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 904 flow. Second operand 16 states and 1514 transitions. [2022-07-13 22:17:10,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1342 flow [2022-07-13 22:17:10,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1230 flow, removed 24 selfloop flow, removed 13 redundant places. [2022-07-13 22:17:10,035 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 917 flow [2022-07-13 22:17:10,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=917, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2022-07-13 22:17:10,036 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2022-07-13 22:17:10,036 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 917 flow [2022-07-13 22:17:10,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:10,037 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 22:17:10,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -861930582, now seen corresponding path program 10 times [2022-07-13 22:17:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:10,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297002879] [2022-07-13 22:17:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:10,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:10,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:10,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297002879] [2022-07-13 22:17:10,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297002879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:10,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:10,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:10,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359979046] [2022-07-13 22:17:10,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:10,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:10,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:10,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 917 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:10,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:10,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:10,726 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2022-07-13 22:17:10,727 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2022-07-13 22:17:10,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3162 event pairs, 47 based on Foata normal form. 1/574 useless extension candidates. Maximal degree in co-relation 1876. Up to 275 conditions per place. [2022-07-13 22:17:10,733 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2022-07-13 22:17:10,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1344 flow [2022-07-13 22:17:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-07-13 22:17:10,735 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-07-13 22:17:10,736 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-07-13 22:17:10,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-07-13 22:17:10,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:10,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-07-13 22:17:10,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,742 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,742 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 917 flow. Second operand 16 states and 1516 transitions. [2022-07-13 22:17:10,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1344 flow [2022-07-13 22:17:10,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1266 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-07-13 22:17:10,754 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 941 flow [2022-07-13 22:17:10,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=941, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2022-07-13 22:17:10,755 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2022-07-13 22:17:10,755 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 941 flow [2022-07-13 22:17:10,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:10,756 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:10,756 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:10,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 22:17:10,756 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1058454566, now seen corresponding path program 11 times [2022-07-13 22:17:10,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:10,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648850152] [2022-07-13 22:17:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:10,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:11,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648850152] [2022-07-13 22:17:11,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648850152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:11,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:11,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:11,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021450546] [2022-07-13 22:17:11,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:11,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:11,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:11,142 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:11,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 941 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:11,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:11,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:11,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:11,560 INFO L129 PetriNetUnfolder]: 159/598 cut-off events. [2022-07-13 22:17:11,561 INFO L130 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2022-07-13 22:17:11,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 598 events. 159/598 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3280 event pairs, 51 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1951. Up to 261 conditions per place. [2022-07-13 22:17:11,567 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2022-07-13 22:17:11,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1403 flow [2022-07-13 22:17:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:17:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 22:17:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2022-07-13 22:17:11,572 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2022-07-13 22:17:11,572 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2022-07-13 22:17:11,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2022-07-13 22:17:11,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:11,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2022-07-13 22:17:11,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:11,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:11,577 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:11,577 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 941 flow. Second operand 17 states and 1609 transitions. [2022-07-13 22:17:11,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1403 flow [2022-07-13 22:17:11,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1311 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-07-13 22:17:11,591 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 982 flow [2022-07-13 22:17:11,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=982, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2022-07-13 22:17:11,592 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2022-07-13 22:17:11,592 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 982 flow [2022-07-13 22:17:11,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:11,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:11,593 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:11,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 22:17:11,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 12 times [2022-07-13 22:17:11,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101748559] [2022-07-13 22:17:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:11,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101748559] [2022-07-13 22:17:11,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101748559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:11,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:11,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943104986] [2022-07-13 22:17:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:11,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:11,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:11,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 982 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:11,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:11,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:11,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:12,329 INFO L129 PetriNetUnfolder]: 160/599 cut-off events. [2022-07-13 22:17:12,330 INFO L130 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-07-13 22:17:12,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2052 conditions, 599 events. 160/599 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3244 event pairs, 79 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 2014. Up to 289 conditions per place. [2022-07-13 22:17:12,336 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2022-07-13 22:17:12,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1461 flow [2022-07-13 22:17:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-07-13 22:17:12,339 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-07-13 22:17:12,339 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-07-13 22:17:12,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-07-13 22:17:12,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:12,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-07-13 22:17:12,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:12,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:12,345 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:12,345 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 982 flow. Second operand 16 states and 1516 transitions. [2022-07-13 22:17:12,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1461 flow [2022-07-13 22:17:12,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1330 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-13 22:17:12,357 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 987 flow [2022-07-13 22:17:12,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=987, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2022-07-13 22:17:12,358 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2022-07-13 22:17:12,358 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 987 flow [2022-07-13 22:17:12,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:12,359 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:12,359 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 22:17:12,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1447154114, now seen corresponding path program 13 times [2022-07-13 22:17:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878066645] [2022-07-13 22:17:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878066645] [2022-07-13 22:17:12,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878066645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:17:12,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:17:12,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 22:17:12,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487883480] [2022-07-13 22:17:12,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:17:12,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:17:12,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:17:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:17:12,682 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-13 22:17:12,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 987 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:12,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:12,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-13 22:17:12,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:13,029 INFO L129 PetriNetUnfolder]: 163/605 cut-off events. [2022-07-13 22:17:13,029 INFO L130 PetriNetUnfolder]: For 2717/2717 co-relation queries the response was YES. [2022-07-13 22:17:13,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 605 events. 163/605 cut-off events. For 2717/2717 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3300 event pairs, 82 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2022. Up to 289 conditions per place. [2022-07-13 22:17:13,035 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2022-07-13 22:17:13,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1453 flow [2022-07-13 22:17:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:17:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:17:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2022-07-13 22:17:13,039 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2022-07-13 22:17:13,039 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2022-07-13 22:17:13,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2022-07-13 22:17:13,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:13,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2022-07-13 22:17:13,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:13,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:13,045 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:13,045 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 987 flow. Second operand 16 states and 1518 transitions. [2022-07-13 22:17:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1453 flow [2022-07-13 22:17:13,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1366 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-07-13 22:17:13,058 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1012 flow [2022-07-13 22:17:13,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1012, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2022-07-13 22:17:13,059 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2022-07-13 22:17:13,059 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1012 flow [2022-07-13 22:17:13,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:13,060 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:13,060 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 22:17:13,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash -414570916, now seen corresponding path program 1 times [2022-07-13 22:17:13,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:13,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245840143] [2022-07-13 22:17:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:13,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:17:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:13,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245840143] [2022-07-13 22:17:13,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245840143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:13,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299425628] [2022-07-13 22:17:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:13,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:13,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:13,115 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) [2022-07-13 22:17:13,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:17:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 22:17:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:13,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:14,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299425628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:14,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:14,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-07-13 22:17:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928609076] [2022-07-13 22:17:14,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:14,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:17:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:17:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:17:14,075 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 145 [2022-07-13 22:17:14,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1012 flow. Second operand has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:14,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:14,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 145 [2022-07-13 22:17:14,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:14,562 INFO L129 PetriNetUnfolder]: 69/767 cut-off events. [2022-07-13 22:17:14,563 INFO L130 PetriNetUnfolder]: For 5719/5871 co-relation queries the response was YES. [2022-07-13 22:17:14,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 767 events. 69/767 cut-off events. For 5719/5871 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5090 event pairs, 8 based on Foata normal form. 96/853 useless extension candidates. Maximal degree in co-relation 2243. Up to 74 conditions per place. [2022-07-13 22:17:14,569 INFO L132 encePairwiseOnDemand]: 129/145 looper letters, 37 selfloop transitions, 23 changer transitions 39/205 dead transitions. [2022-07-13 22:17:14,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 205 transitions, 1189 flow [2022-07-13 22:17:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 22:17:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 22:17:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2154 transitions. [2022-07-13 22:17:14,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7818511796733212 [2022-07-13 22:17:14,586 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2154 transitions. [2022-07-13 22:17:14,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2154 transitions. [2022-07-13 22:17:14,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:14,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2154 transitions. [2022-07-13 22:17:14,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.36842105263158) internal successors, (2154), 19 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:14,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:14,594 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:14,594 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1012 flow. Second operand 19 states and 2154 transitions. [2022-07-13 22:17:14,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 205 transitions, 1189 flow [2022-07-13 22:17:14,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 205 transitions, 1095 flow, removed 3 selfloop flow, removed 19 redundant places. [2022-07-13 22:17:14,605 INFO L242 Difference]: Finished difference. Result has 217 places, 146 transitions, 631 flow [2022-07-13 22:17:14,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=631, PETRI_PLACES=217, PETRI_TRANSITIONS=146} [2022-07-13 22:17:14,606 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 87 predicate places. [2022-07-13 22:17:14,606 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 146 transitions, 631 flow [2022-07-13 22:17:14,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:14,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:14,607 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:14,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 22:17:14,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1913345623, now seen corresponding path program 1 times [2022-07-13 22:17:14,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:14,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618468699] [2022-07-13 22:17:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:14,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618468699] [2022-07-13 22:17:14,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618468699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951528546] [2022-07-13 22:17:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:14,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:14,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:14,904 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) [2022-07-13 22:17:14,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:17:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:17:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:15,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:15,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951528546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:15,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:15,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:17:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185747620] [2022-07-13 22:17:15,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:15,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:17:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:17:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:17:15,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2022-07-13 22:17:15,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 146 transitions, 631 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:15,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:15,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2022-07-13 22:17:15,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:15,607 INFO L129 PetriNetUnfolder]: 40/411 cut-off events. [2022-07-13 22:17:15,607 INFO L130 PetriNetUnfolder]: For 2386/2444 co-relation queries the response was YES. [2022-07-13 22:17:15,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 411 events. 40/411 cut-off events. For 2386/2444 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1532 event pairs, 11 based on Foata normal form. 9/413 useless extension candidates. Maximal degree in co-relation 1165. Up to 58 conditions per place. [2022-07-13 22:17:15,611 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2022-07-13 22:17:15,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 153 transitions, 742 flow [2022-07-13 22:17:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:17:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:17:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2022-07-13 22:17:15,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-13 22:17:15,615 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2022-07-13 22:17:15,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2022-07-13 22:17:15,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:15,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2022-07-13 22:17:15,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:15,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:15,621 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:15,622 INFO L186 Difference]: Start difference. First operand has 217 places, 146 transitions, 631 flow. Second operand 12 states and 1385 transitions. [2022-07-13 22:17:15,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 153 transitions, 742 flow [2022-07-13 22:17:15,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 153 transitions, 575 flow, removed 62 selfloop flow, removed 31 redundant places. [2022-07-13 22:17:15,629 INFO L242 Difference]: Finished difference. Result has 168 places, 143 transitions, 476 flow [2022-07-13 22:17:15,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=476, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2022-07-13 22:17:15,630 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 38 predicate places. [2022-07-13 22:17:15,630 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 476 flow [2022-07-13 22:17:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:15,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:15,631 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:15,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:17:15,855 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1401002454, now seen corresponding path program 2 times [2022-07-13 22:17:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:15,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955762617] [2022-07-13 22:17:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:16,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955762617] [2022-07-13 22:17:16,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955762617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564293736] [2022-07-13 22:17:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:17:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:16,472 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) [2022-07-13 22:17:16,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:17:16,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:17:16,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:16,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 22:17:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:17,232 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 22:17:17,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-13 22:17:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:17,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:17,446 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:17:17,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-13 22:17:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:18,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564293736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:18,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:18,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 44 [2022-07-13 22:17:18,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029430580] [2022-07-13 22:17:18,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 22:17:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 22:17:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 22:17:18,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2022-07-13 22:17:18,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 476 flow. Second operand has 44 states, 44 states have (on average 76.47727272727273) internal successors, (3365), 44 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:18,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:18,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2022-07-13 22:17:18,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:21,167 INFO L129 PetriNetUnfolder]: 986/3457 cut-off events. [2022-07-13 22:17:21,168 INFO L130 PetriNetUnfolder]: For 3754/3882 co-relation queries the response was YES. [2022-07-13 22:17:21,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8014 conditions, 3457 events. 986/3457 cut-off events. For 3754/3882 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 31081 event pairs, 142 based on Foata normal form. 56/3287 useless extension candidates. Maximal degree in co-relation 7994. Up to 434 conditions per place. [2022-07-13 22:17:21,196 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 267 selfloop transitions, 121 changer transitions 0/459 dead transitions. [2022-07-13 22:17:21,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 459 transitions, 2504 flow [2022-07-13 22:17:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 22:17:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 22:17:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4145 transitions. [2022-07-13 22:17:21,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5497347480106101 [2022-07-13 22:17:21,209 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4145 transitions. [2022-07-13 22:17:21,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4145 transitions. [2022-07-13 22:17:21,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:21,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4145 transitions. [2022-07-13 22:17:21,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 79.71153846153847) internal successors, (4145), 52 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:21,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:21,270 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:21,270 INFO L186 Difference]: Start difference. First operand has 168 places, 143 transitions, 476 flow. Second operand 52 states and 4145 transitions. [2022-07-13 22:17:21,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 459 transitions, 2504 flow [2022-07-13 22:17:21,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 459 transitions, 2410 flow, removed 34 selfloop flow, removed 10 redundant places. [2022-07-13 22:17:21,286 INFO L242 Difference]: Finished difference. Result has 229 places, 271 transitions, 1658 flow [2022-07-13 22:17:21,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1658, PETRI_PLACES=229, PETRI_TRANSITIONS=271} [2022-07-13 22:17:21,286 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 99 predicate places. [2022-07-13 22:17:21,287 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 271 transitions, 1658 flow [2022-07-13 22:17:21,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.47727272727273) internal successors, (3365), 44 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:21,288 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:21,288 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:21,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:17:21,503 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1534631996, now seen corresponding path program 3 times [2022-07-13 22:17:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:21,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011887354] [2022-07-13 22:17:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011887354] [2022-07-13 22:17:21,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011887354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106543934] [2022-07-13 22:17:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:17:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:21,881 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) [2022-07-13 22:17:21,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:17:21,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:17:21,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:17:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:22,280 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:17:22,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:17:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:17:22,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:22,347 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:17:22,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-13 22:17:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:17:22,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106543934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:22,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:22,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 22 [2022-07-13 22:17:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862315385] [2022-07-13 22:17:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:17:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:17:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:17:22,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-07-13 22:17:22,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 271 transitions, 1658 flow. Second operand has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:22,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:22,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-07-13 22:17:22,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:23,749 INFO L129 PetriNetUnfolder]: 1291/4318 cut-off events. [2022-07-13 22:17:23,749 INFO L130 PetriNetUnfolder]: For 13367/13925 co-relation queries the response was YES. [2022-07-13 22:17:23,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12643 conditions, 4318 events. 1291/4318 cut-off events. For 13367/13925 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 40804 event pairs, 278 based on Foata normal form. 174/4266 useless extension candidates. Maximal degree in co-relation 12599. Up to 1358 conditions per place. [2022-07-13 22:17:23,787 INFO L132 encePairwiseOnDemand]: 121/145 looper letters, 211 selfloop transitions, 99 changer transitions 0/395 dead transitions. [2022-07-13 22:17:23,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 395 transitions, 3255 flow [2022-07-13 22:17:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 22:17:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-13 22:17:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2685 transitions. [2022-07-13 22:17:23,790 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6613300492610837 [2022-07-13 22:17:23,790 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2685 transitions. [2022-07-13 22:17:23,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2685 transitions. [2022-07-13 22:17:23,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:23,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2685 transitions. [2022-07-13 22:17:23,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 95.89285714285714) internal successors, (2685), 28 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:23,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:23,800 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:23,800 INFO L186 Difference]: Start difference. First operand has 229 places, 271 transitions, 1658 flow. Second operand 28 states and 2685 transitions. [2022-07-13 22:17:23,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 395 transitions, 3255 flow [2022-07-13 22:17:23,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 395 transitions, 2929 flow, removed 145 selfloop flow, removed 15 redundant places. [2022-07-13 22:17:23,852 INFO L242 Difference]: Finished difference. Result has 249 places, 328 transitions, 2281 flow [2022-07-13 22:17:23,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2281, PETRI_PLACES=249, PETRI_TRANSITIONS=328} [2022-07-13 22:17:23,853 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 119 predicate places. [2022-07-13 22:17:23,853 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 328 transitions, 2281 flow [2022-07-13 22:17:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:23,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:23,854 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:23,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:24,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:24,076 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash -425803110, now seen corresponding path program 4 times [2022-07-13 22:17:24,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:24,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507052793] [2022-07-13 22:17:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:24,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:24,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507052793] [2022-07-13 22:17:24,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507052793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:24,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041270690] [2022-07-13 22:17:24,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:17:24,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:24,509 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) [2022-07-13 22:17:24,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:17:24,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:17:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 22:17:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:25,285 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 22:17:25,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-13 22:17:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:25,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:25,426 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:17:25,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-13 22:17:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:25,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041270690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:25,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:25,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2022-07-13 22:17:25,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100333350] [2022-07-13 22:17:25,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:25,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 22:17:25,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 22:17:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 22:17:25,950 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-07-13 22:17:25,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 328 transitions, 2281 flow. Second operand has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:25,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:25,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-07-13 22:17:25,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:29,051 INFO L129 PetriNetUnfolder]: 1750/5923 cut-off events. [2022-07-13 22:17:29,052 INFO L130 PetriNetUnfolder]: For 24663/25289 co-relation queries the response was YES. [2022-07-13 22:17:29,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19554 conditions, 5923 events. 1750/5923 cut-off events. For 24663/25289 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 57610 event pairs, 236 based on Foata normal form. 263/5901 useless extension candidates. Maximal degree in co-relation 19504. Up to 799 conditions per place. [2022-07-13 22:17:29,110 INFO L132 encePairwiseOnDemand]: 116/145 looper letters, 258 selfloop transitions, 271 changer transitions 3/617 dead transitions. [2022-07-13 22:17:29,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 617 transitions, 5886 flow [2022-07-13 22:17:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 22:17:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-13 22:17:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4750 transitions. [2022-07-13 22:17:29,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6685432793807178 [2022-07-13 22:17:29,117 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4750 transitions. [2022-07-13 22:17:29,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4750 transitions. [2022-07-13 22:17:29,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:29,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4750 transitions. [2022-07-13 22:17:29,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 96.93877551020408) internal successors, (4750), 49 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:29,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:29,133 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:29,133 INFO L186 Difference]: Start difference. First operand has 249 places, 328 transitions, 2281 flow. Second operand 49 states and 4750 transitions. [2022-07-13 22:17:29,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 617 transitions, 5886 flow [2022-07-13 22:17:29,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 617 transitions, 5793 flow, removed 27 selfloop flow, removed 18 redundant places. [2022-07-13 22:17:29,207 INFO L242 Difference]: Finished difference. Result has 293 places, 473 transitions, 4512 flow [2022-07-13 22:17:29,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4512, PETRI_PLACES=293, PETRI_TRANSITIONS=473} [2022-07-13 22:17:29,208 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 163 predicate places. [2022-07-13 22:17:29,208 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 473 transitions, 4512 flow [2022-07-13 22:17:29,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:29,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:29,209 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:29,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:29,411 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1035882360, now seen corresponding path program 5 times [2022-07-13 22:17:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:29,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191464767] [2022-07-13 22:17:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:29,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191464767] [2022-07-13 22:17:29,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191464767] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288912651] [2022-07-13 22:17:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:17:29,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:29,976 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) [2022-07-13 22:17:29,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:17:30,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:17:30,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 22:17:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:30,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:17:30,325 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:17:30,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:17:30,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 22:17:30,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:17:30,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:17:31,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-13 22:17:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:31,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:31,868 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:31,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-07-13 22:17:31,877 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:17:31,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 136 [2022-07-13 22:17:31,883 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:17:31,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 105 [2022-07-13 22:17:31,898 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:17:31,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-07-13 22:17:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:32,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288912651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:32,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:32,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 58 [2022-07-13 22:17:32,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015194098] [2022-07-13 22:17:32,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 22:17:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 22:17:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2694, Unknown=43, NotChecked=0, Total=3306 [2022-07-13 22:17:32,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 145 [2022-07-13 22:17:32,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 473 transitions, 4512 flow. Second operand has 58 states, 58 states have (on average 83.32758620689656) internal successors, (4833), 58 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:32,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:32,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 145 [2022-07-13 22:17:32,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:37,354 INFO L129 PetriNetUnfolder]: 2786/9128 cut-off events. [2022-07-13 22:17:37,354 INFO L130 PetriNetUnfolder]: For 61556/62973 co-relation queries the response was YES. [2022-07-13 22:17:37,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35117 conditions, 9128 events. 2786/9128 cut-off events. For 61556/62973 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 93699 event pairs, 732 based on Foata normal form. 602/9130 useless extension candidates. Maximal degree in co-relation 35051. Up to 1303 conditions per place. [2022-07-13 22:17:37,456 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 483 selfloop transitions, 260 changer transitions 0/822 dead transitions. [2022-07-13 22:17:37,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 822 transitions, 9773 flow [2022-07-13 22:17:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 22:17:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-13 22:17:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5241 transitions. [2022-07-13 22:17:37,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5925381571509327 [2022-07-13 22:17:37,464 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5241 transitions. [2022-07-13 22:17:37,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5241 transitions. [2022-07-13 22:17:37,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:37,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5241 transitions. [2022-07-13 22:17:37,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 85.91803278688525) internal successors, (5241), 61 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:37,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 145.0) internal successors, (8990), 62 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:37,488 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 145.0) internal successors, (8990), 62 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:37,488 INFO L186 Difference]: Start difference. First operand has 293 places, 473 transitions, 4512 flow. Second operand 61 states and 5241 transitions. [2022-07-13 22:17:37,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 822 transitions, 9773 flow [2022-07-13 22:17:37,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 822 transitions, 9306 flow, removed 169 selfloop flow, removed 25 redundant places. [2022-07-13 22:17:37,793 INFO L242 Difference]: Finished difference. Result has 347 places, 575 transitions, 6478 flow [2022-07-13 22:17:37,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6478, PETRI_PLACES=347, PETRI_TRANSITIONS=575} [2022-07-13 22:17:37,794 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 217 predicate places. [2022-07-13 22:17:37,795 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 575 transitions, 6478 flow [2022-07-13 22:17:37,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 83.32758620689656) internal successors, (4833), 58 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:37,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:37,796 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:37,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:38,000 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1182492120, now seen corresponding path program 6 times [2022-07-13 22:17:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:38,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473600351] [2022-07-13 22:17:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:38,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:38,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473600351] [2022-07-13 22:17:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473600351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:38,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283577665] [2022-07-13 22:17:38,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:17:38,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:38,820 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) [2022-07-13 22:17:38,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:17:38,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:17:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:38,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 22:17:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:17:39,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-13 22:17:39,816 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 22:17:39,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-13 22:17:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:39,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:40,119 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:40,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-13 22:17:40,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-13 22:17:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:41,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283577665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:41,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:41,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 21] total 63 [2022-07-13 22:17:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688229804] [2022-07-13 22:17:41,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:41,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 22:17:41,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 22:17:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3542, Unknown=2, NotChecked=0, Total=3906 [2022-07-13 22:17:41,224 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2022-07-13 22:17:41,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 575 transitions, 6478 flow. Second operand has 63 states, 63 states have (on average 61.98412698412698) internal successors, (3905), 63 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:41,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:41,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2022-07-13 22:17:41,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:46,191 INFO L129 PetriNetUnfolder]: 3470/8565 cut-off events. [2022-07-13 22:17:46,191 INFO L130 PetriNetUnfolder]: For 74613/74703 co-relation queries the response was YES. [2022-07-13 22:17:46,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37234 conditions, 8565 events. 3470/8565 cut-off events. For 74613/74703 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 77287 event pairs, 880 based on Foata normal form. 263/8623 useless extension candidates. Maximal degree in co-relation 37151. Up to 1285 conditions per place. [2022-07-13 22:17:46,278 INFO L132 encePairwiseOnDemand]: 116/145 looper letters, 369 selfloop transitions, 164 changer transitions 48/637 dead transitions. [2022-07-13 22:17:46,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 637 transitions, 7108 flow [2022-07-13 22:17:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 22:17:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 22:17:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3083 transitions. [2022-07-13 22:17:46,282 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4523844460748349 [2022-07-13 22:17:46,282 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3083 transitions. [2022-07-13 22:17:46,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3083 transitions. [2022-07-13 22:17:46,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:46,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3083 transitions. [2022-07-13 22:17:46,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 65.59574468085107) internal successors, (3083), 47 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:46,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:46,292 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:46,292 INFO L186 Difference]: Start difference. First operand has 347 places, 575 transitions, 6478 flow. Second operand 47 states and 3083 transitions. [2022-07-13 22:17:46,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 637 transitions, 7108 flow [2022-07-13 22:17:46,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 637 transitions, 6646 flow, removed 140 selfloop flow, removed 47 redundant places. [2022-07-13 22:17:46,597 INFO L242 Difference]: Finished difference. Result has 350 places, 414 transitions, 4530 flow [2022-07-13 22:17:46,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4530, PETRI_PLACES=350, PETRI_TRANSITIONS=414} [2022-07-13 22:17:46,598 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 220 predicate places. [2022-07-13 22:17:46,598 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 414 transitions, 4530 flow [2022-07-13 22:17:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 61.98412698412698) internal successors, (3905), 63 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:46,599 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:46,600 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:46,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:46,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:46,816 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash 527677660, now seen corresponding path program 7 times [2022-07-13 22:17:46,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306130003] [2022-07-13 22:17:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:46,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:47,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:47,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306130003] [2022-07-13 22:17:47,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306130003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:47,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98015932] [2022-07-13 22:17:47,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:17:47,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:47,533 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) [2022-07-13 22:17:47,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:17:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 22:17:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:47,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:17:47,777 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:17:47,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:17:48,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:17:48,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-13 22:17:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:48,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:48,677 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:48,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-13 22:17:48,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-13 22:17:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:49,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98015932] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:49,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:49,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2022-07-13 22:17:49,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637755296] [2022-07-13 22:17:49,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:49,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 22:17:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:49,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 22:17:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3028, Unknown=0, NotChecked=0, Total=3306 [2022-07-13 22:17:49,890 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2022-07-13 22:17:49,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 414 transitions, 4530 flow. Second operand has 58 states, 58 states have (on average 84.32758620689656) internal successors, (4891), 58 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:49,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:49,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2022-07-13 22:17:49,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:56,064 INFO L129 PetriNetUnfolder]: 1582/5685 cut-off events. [2022-07-13 22:17:56,071 INFO L130 PetriNetUnfolder]: For 58594/59134 co-relation queries the response was YES. [2022-07-13 22:17:56,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 5685 events. 1582/5685 cut-off events. For 58594/59134 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 54641 event pairs, 374 based on Foata normal form. 250/5695 useless extension candidates. Maximal degree in co-relation 25163. Up to 904 conditions per place. [2022-07-13 22:17:56,155 INFO L132 encePairwiseOnDemand]: 117/145 looper letters, 327 selfloop transitions, 242 changer transitions 3/661 dead transitions. [2022-07-13 22:17:56,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 661 transitions, 8676 flow [2022-07-13 22:17:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 22:17:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-13 22:17:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4587 transitions. [2022-07-13 22:17:56,161 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5968770331815224 [2022-07-13 22:17:56,161 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4587 transitions. [2022-07-13 22:17:56,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4587 transitions. [2022-07-13 22:17:56,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:56,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4587 transitions. [2022-07-13 22:17:56,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 86.54716981132076) internal successors, (4587), 53 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:56,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:56,173 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:56,173 INFO L186 Difference]: Start difference. First operand has 350 places, 414 transitions, 4530 flow. Second operand 53 states and 4587 transitions. [2022-07-13 22:17:56,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 661 transitions, 8676 flow [2022-07-13 22:17:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 661 transitions, 8421 flow, removed 61 selfloop flow, removed 30 redundant places. [2022-07-13 22:17:56,534 INFO L242 Difference]: Finished difference. Result has 376 places, 497 transitions, 6559 flow [2022-07-13 22:17:56,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6559, PETRI_PLACES=376, PETRI_TRANSITIONS=497} [2022-07-13 22:17:56,535 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 246 predicate places. [2022-07-13 22:17:56,535 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 497 transitions, 6559 flow [2022-07-13 22:17:56,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 84.32758620689656) internal successors, (4891), 58 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:17:56,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:56,536 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:56,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:56,736 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,SelfDestructingSolverStorable22 [2022-07-13 22:17:56,737 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1646386628, now seen corresponding path program 8 times [2022-07-13 22:17:56,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:56,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810768966] [2022-07-13 22:17:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:57,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810768966] [2022-07-13 22:17:57,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810768966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847172432] [2022-07-13 22:17:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:17:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:57,314 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) [2022-07-13 22:17:57,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:17:57,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:17:57,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 22:17:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:17:58,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-13 22:17:58,512 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 22:17:58,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-13 22:17:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:58,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:58,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:58,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-13 22:17:58,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-13 22:18:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:00,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847172432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:00,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:00,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 58 [2022-07-13 22:18:00,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921507467] [2022-07-13 22:18:00,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:00,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 22:18:00,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:00,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 22:18:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3056, Unknown=1, NotChecked=0, Total=3306 [2022-07-13 22:18:00,107 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 145 [2022-07-13 22:18:00,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 497 transitions, 6559 flow. Second operand has 58 states, 58 states have (on average 70.79310344827586) internal successors, (4106), 58 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:00,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:00,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 145 [2022-07-13 22:18:00,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:04,979 INFO L129 PetriNetUnfolder]: 1783/6550 cut-off events. [2022-07-13 22:18:04,979 INFO L130 PetriNetUnfolder]: For 78430/79216 co-relation queries the response was YES. [2022-07-13 22:18:05,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30605 conditions, 6550 events. 1783/6550 cut-off events. For 78430/79216 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 65799 event pairs, 394 based on Foata normal form. 387/6645 useless extension candidates. Maximal degree in co-relation 30518. Up to 1210 conditions per place. [2022-07-13 22:18:05,074 INFO L132 encePairwiseOnDemand]: 112/145 looper letters, 276 selfloop transitions, 352 changer transitions 0/706 dead transitions. [2022-07-13 22:18:05,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 706 transitions, 10811 flow [2022-07-13 22:18:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 22:18:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-13 22:18:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3189 transitions. [2022-07-13 22:18:05,078 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4998432601880878 [2022-07-13 22:18:05,079 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3189 transitions. [2022-07-13 22:18:05,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3189 transitions. [2022-07-13 22:18:05,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:05,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3189 transitions. [2022-07-13 22:18:05,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 72.47727272727273) internal successors, (3189), 44 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) [2022-07-13 22:18:05,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:05,092 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:05,092 INFO L186 Difference]: Start difference. First operand has 376 places, 497 transitions, 6559 flow. Second operand 44 states and 3189 transitions. [2022-07-13 22:18:05,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 706 transitions, 10811 flow [2022-07-13 22:18:05,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 706 transitions, 10533 flow, removed 73 selfloop flow, removed 31 redundant places. [2022-07-13 22:18:05,392 INFO L242 Difference]: Finished difference. Result has 397 places, 603 transitions, 9597 flow [2022-07-13 22:18:05,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9597, PETRI_PLACES=397, PETRI_TRANSITIONS=603} [2022-07-13 22:18:05,393 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 267 predicate places. [2022-07-13 22:18:05,393 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 603 transitions, 9597 flow [2022-07-13 22:18:05,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 70.79310344827586) internal successors, (4106), 58 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:05,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:05,394 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:18:05,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 22:18:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 22:18:05,612 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -703129418, now seen corresponding path program 9 times [2022-07-13 22:18:05,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553741730] [2022-07-13 22:18:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553741730] [2022-07-13 22:18:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553741730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991050344] [2022-07-13 22:18:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:18:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:06,204 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) [2022-07-13 22:18:06,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:18:06,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:18:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:06,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 22:18:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:06,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:18:06,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:18:06,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-13 22:18:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:18:06,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:06,734 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2022-07-13 22:18:06,767 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:18:06,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-13 22:18:06,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-13 22:18:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-07-13 22:18:07,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991050344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:07,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:07,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 39 [2022-07-13 22:18:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195916341] [2022-07-13 22:18:07,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 22:18:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 22:18:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1303, Unknown=1, NotChecked=72, Total=1482 [2022-07-13 22:18:07,138 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 145 [2022-07-13 22:18:07,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 603 transitions, 9597 flow. Second operand has 39 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:07,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:07,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 145 [2022-07-13 22:18:07,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:11,052 INFO L129 PetriNetUnfolder]: 1809/6478 cut-off events. [2022-07-13 22:18:11,052 INFO L130 PetriNetUnfolder]: For 102195/103198 co-relation queries the response was YES. [2022-07-13 22:18:11,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33116 conditions, 6478 events. 1809/6478 cut-off events. For 102195/103198 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 64384 event pairs, 518 based on Foata normal form. 548/6712 useless extension candidates. Maximal degree in co-relation 33021. Up to 1081 conditions per place. [2022-07-13 22:18:11,126 INFO L132 encePairwiseOnDemand]: 124/145 looper letters, 328 selfloop transitions, 297 changer transitions 0/717 dead transitions. [2022-07-13 22:18:11,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 717 transitions, 12699 flow [2022-07-13 22:18:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 22:18:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-13 22:18:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3058 transitions. [2022-07-13 22:18:11,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6202839756592292 [2022-07-13 22:18:11,130 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3058 transitions. [2022-07-13 22:18:11,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3058 transitions. [2022-07-13 22:18:11,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:11,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3058 transitions. [2022-07-13 22:18:11,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.94117647058823) internal successors, (3058), 34 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,138 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,138 INFO L186 Difference]: Start difference. First operand has 397 places, 603 transitions, 9597 flow. Second operand 34 states and 3058 transitions. [2022-07-13 22:18:11,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 717 transitions, 12699 flow [2022-07-13 22:18:11,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 717 transitions, 12174 flow, removed 35 selfloop flow, removed 38 redundant places. [2022-07-13 22:18:11,430 INFO L242 Difference]: Finished difference. Result has 393 places, 629 transitions, 10738 flow [2022-07-13 22:18:11,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=9104, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10738, PETRI_PLACES=393, PETRI_TRANSITIONS=629} [2022-07-13 22:18:11,431 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 263 predicate places. [2022-07-13 22:18:11,432 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 629 transitions, 10738 flow [2022-07-13 22:18:11,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:11,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:11,432 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:18:11,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:11,636 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,SelfDestructingSolverStorable24 [2022-07-13 22:18:11,637 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 566654440, now seen corresponding path program 1 times [2022-07-13 22:18:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272832964] [2022-07-13 22:18:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:13,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272832964] [2022-07-13 22:18:13,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272832964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:13,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048351128] [2022-07-13 22:18:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:13,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:13,536 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) [2022-07-13 22:18:13,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:18:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 22:18:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:15,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-07-13 22:18:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:15,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:16,616 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:18:16,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-13 22:18:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:19,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048351128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:19,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:19,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 30] total 95 [2022-07-13 22:18:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377045093] [2022-07-13 22:18:19,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-13 22:18:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-13 22:18:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=8220, Unknown=1, NotChecked=0, Total=8930 [2022-07-13 22:18:19,140 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 145 [2022-07-13 22:18:19,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 629 transitions, 10738 flow. Second operand has 95 states, 95 states have (on average 46.61052631578947) internal successors, (4428), 95 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:19,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:19,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 145 [2022-07-13 22:18:19,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:40,711 INFO L129 PetriNetUnfolder]: 7575/16930 cut-off events. [2022-07-13 22:18:40,711 INFO L130 PetriNetUnfolder]: For 279534/279674 co-relation queries the response was YES. [2022-07-13 22:18:40,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96578 conditions, 16930 events. 7575/16930 cut-off events. For 279534/279674 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 158654 event pairs, 967 based on Foata normal form. 116/16941 useless extension candidates. Maximal degree in co-relation 96483. Up to 5374 conditions per place. [2022-07-13 22:18:40,893 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 574 selfloop transitions, 832 changer transitions 109/1553 dead transitions. [2022-07-13 22:18:40,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1553 transitions, 27300 flow [2022-07-13 22:18:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-13 22:18:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-13 22:18:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 5727 transitions. [2022-07-13 22:18:40,901 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.340487514863258 [2022-07-13 22:18:40,901 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 5727 transitions. [2022-07-13 22:18:40,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 5727 transitions. [2022-07-13 22:18:40,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:40,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 5727 transitions. [2022-07-13 22:18:40,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 49.37068965517241) internal successors, (5727), 116 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 145.0) internal successors, (16965), 117 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,925 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 145.0) internal successors, (16965), 117 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,926 INFO L186 Difference]: Start difference. First operand has 393 places, 629 transitions, 10738 flow. Second operand 116 states and 5727 transitions. [2022-07-13 22:18:40,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1553 transitions, 27300 flow [2022-07-13 22:18:41,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1553 transitions, 26719 flow, removed 33 selfloop flow, removed 32 redundant places. [2022-07-13 22:18:41,978 INFO L242 Difference]: Finished difference. Result has 520 places, 1096 transitions, 21413 flow [2022-07-13 22:18:41,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=10463, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=21413, PETRI_PLACES=520, PETRI_TRANSITIONS=1096} [2022-07-13 22:18:41,979 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 390 predicate places. [2022-07-13 22:18:41,979 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1096 transitions, 21413 flow [2022-07-13 22:18:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 46.61052631578947) internal successors, (4428), 95 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:41,980 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:18:41,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:42,180 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,SelfDestructingSolverStorable25 [2022-07-13 22:18:42,181 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1631453886, now seen corresponding path program 2 times [2022-07-13 22:18:42,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:42,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845195155] [2022-07-13 22:18:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:43,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845195155] [2022-07-13 22:18:43,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845195155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055730279] [2022-07-13 22:18:43,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:18:43,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:43,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:43,521 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) [2022-07-13 22:18:43,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:18:43,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:18:43,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 22:18:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:45,099 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 22:18:45,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-13 22:18:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:45,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:46,629 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:18:46,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-13 22:18:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:48,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055730279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:48,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:48,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-07-13 22:18:48,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232065476] [2022-07-13 22:18:48,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:48,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-13 22:18:48,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:48,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-13 22:18:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=7140, Unknown=0, NotChecked=0, Total=7832 [2022-07-13 22:18:48,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-13 22:18:48,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1096 transitions, 21413 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:48,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:48,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-13 22:18:48,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:03,578 INFO L129 PetriNetUnfolder]: 8335/18192 cut-off events. [2022-07-13 22:19:03,578 INFO L130 PetriNetUnfolder]: For 443139/443359 co-relation queries the response was YES. [2022-07-13 22:19:03,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134157 conditions, 18192 events. 8335/18192 cut-off events. For 443139/443359 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 170946 event pairs, 1966 based on Foata normal form. 133/18146 useless extension candidates. Maximal degree in co-relation 134025. Up to 9806 conditions per place. [2022-07-13 22:19:03,889 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 845 selfloop transitions, 829 changer transitions 20/1740 dead transitions. [2022-07-13 22:19:03,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1740 transitions, 34516 flow [2022-07-13 22:19:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-13 22:19:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-07-13 22:19:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5908 transitions. [2022-07-13 22:19:03,897 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42442528735632185 [2022-07-13 22:19:03,897 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5908 transitions. [2022-07-13 22:19:03,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5908 transitions. [2022-07-13 22:19:03,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:03,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5908 transitions. [2022-07-13 22:19:03,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 61.541666666666664) internal successors, (5908), 96 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:03,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 145.0) internal successors, (14065), 97 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:03,919 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 145.0) internal successors, (14065), 97 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:03,919 INFO L186 Difference]: Start difference. First operand has 520 places, 1096 transitions, 21413 flow. Second operand 96 states and 5908 transitions. [2022-07-13 22:19:03,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1740 transitions, 34516 flow [2022-07-13 22:19:06,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1740 transitions, 33931 flow, removed 209 selfloop flow, removed 46 redundant places. [2022-07-13 22:19:06,533 INFO L242 Difference]: Finished difference. Result has 570 places, 1371 transitions, 29332 flow [2022-07-13 22:19:06,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=21028, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=29332, PETRI_PLACES=570, PETRI_TRANSITIONS=1371} [2022-07-13 22:19:06,535 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 440 predicate places. [2022-07-13 22:19:06,535 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1371 transitions, 29332 flow [2022-07-13 22:19:06,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:06,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:06,536 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:06,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 22:19:06,739 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,SelfDestructingSolverStorable26 [2022-07-13 22:19:06,739 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash -981436956, now seen corresponding path program 3 times [2022-07-13 22:19:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:06,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839698735] [2022-07-13 22:19:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:06,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839698735] [2022-07-13 22:19:08,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839698735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893097594] [2022-07-13 22:19:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:19:08,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:08,055 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) [2022-07-13 22:19:08,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:19:08,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:19:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 22:19:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:09,062 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:19:09,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:19:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:19:09,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:10,312 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:19:10,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-13 22:19:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:19:11,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893097594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:11,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2022-07-13 22:19:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46540968] [2022-07-13 22:19:11,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:11,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-13 22:19:11,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-13 22:19:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2022-07-13 22:19:11,161 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-13 22:19:11,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1371 transitions, 29332 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:11,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:11,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-13 22:19:11,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:22,739 INFO L129 PetriNetUnfolder]: 9641/21054 cut-off events. [2022-07-13 22:19:22,739 INFO L130 PetriNetUnfolder]: For 550778/550999 co-relation queries the response was YES. [2022-07-13 22:19:22,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160971 conditions, 21054 events. 9641/21054 cut-off events. For 550778/550999 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 202132 event pairs, 3402 based on Foata normal form. 134/20991 useless extension candidates. Maximal degree in co-relation 160834. Up to 14227 conditions per place. [2022-07-13 22:19:23,060 INFO L132 encePairwiseOnDemand]: 106/145 looper letters, 1046 selfloop transitions, 960 changer transitions 11/2063 dead transitions. [2022-07-13 22:19:23,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2063 transitions, 47324 flow [2022-07-13 22:19:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 22:19:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-13 22:19:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3821 transitions. [2022-07-13 22:19:23,065 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.425027808676307 [2022-07-13 22:19:23,065 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3821 transitions. [2022-07-13 22:19:23,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3821 transitions. [2022-07-13 22:19:23,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:23,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3821 transitions. [2022-07-13 22:19:23,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 61.62903225806452) internal successors, (3821), 62 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:23,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:23,077 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:23,077 INFO L186 Difference]: Start difference. First operand has 570 places, 1371 transitions, 29332 flow. Second operand 62 states and 3821 transitions. [2022-07-13 22:19:23,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2063 transitions, 47324 flow [2022-07-13 22:19:28,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 2063 transitions, 46439 flow, removed 297 selfloop flow, removed 42 redundant places. [2022-07-13 22:19:28,191 INFO L242 Difference]: Finished difference. Result has 604 places, 1837 transitions, 44207 flow [2022-07-13 22:19:28,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=28763, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=44207, PETRI_PLACES=604, PETRI_TRANSITIONS=1837} [2022-07-13 22:19:28,198 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 474 predicate places. [2022-07-13 22:19:28,199 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1837 transitions, 44207 flow [2022-07-13 22:19:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:28,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:28,200 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:19:28,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:28,405 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,SelfDestructingSolverStorable27 [2022-07-13 22:19:28,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1094007968, now seen corresponding path program 4 times [2022-07-13 22:19:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:28,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506687698] [2022-07-13 22:19:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:28,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506687698] [2022-07-13 22:19:30,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506687698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233629812] [2022-07-13 22:19:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:19:30,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:30,168 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) [2022-07-13 22:19:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:19:30,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:19:30,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 22:19:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:31,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-13 22:19:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:32,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:33,302 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:19:33,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-13 22:19:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:35,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233629812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:35,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:35,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 31] total 96 [2022-07-13 22:19:35,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245172001] [2022-07-13 22:19:35,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:35,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-13 22:19:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-13 22:19:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8463, Unknown=0, NotChecked=0, Total=9120 [2022-07-13 22:19:35,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2022-07-13 22:19:35,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1837 transitions, 44207 flow. Second operand has 96 states, 96 states have (on average 49.552083333333336) internal successors, (4757), 96 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) [2022-07-13 22:19:35,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:35,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2022-07-13 22:19:35,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:00,573 INFO L129 PetriNetUnfolder]: 10762/23385 cut-off events. [2022-07-13 22:20:00,573 INFO L130 PetriNetUnfolder]: For 719088/719362 co-relation queries the response was YES. [2022-07-13 22:20:00,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193212 conditions, 23385 events. 10762/23385 cut-off events. For 719088/719362 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 226756 event pairs, 2319 based on Foata normal form. 187/23363 useless extension candidates. Maximal degree in co-relation 193062. Up to 11359 conditions per place. [2022-07-13 22:20:00,993 INFO L132 encePairwiseOnDemand]: 103/145 looper letters, 1090 selfloop transitions, 1384 changer transitions 19/2534 dead transitions. [2022-07-13 22:20:00,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 2534 transitions, 63572 flow [2022-07-13 22:20:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-13 22:20:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-13 22:20:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4423 transitions. [2022-07-13 22:20:00,997 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.363136288998358 [2022-07-13 22:20:00,997 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4423 transitions. [2022-07-13 22:20:00,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4423 transitions. [2022-07-13 22:20:00,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:00,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4423 transitions. [2022-07-13 22:20:01,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 52.654761904761905) internal successors, (4423), 84 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:01,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 145.0) internal successors, (12325), 85 states have internal predecessors, (12325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:01,012 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 145.0) internal successors, (12325), 85 states have internal predecessors, (12325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:01,012 INFO L186 Difference]: Start difference. First operand has 604 places, 1837 transitions, 44207 flow. Second operand 84 states and 4423 transitions. [2022-07-13 22:20:01,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 2534 transitions, 63572 flow [2022-07-13 22:20:07,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 2534 transitions, 63078 flow, removed 189 selfloop flow, removed 22 redundant places. [2022-07-13 22:20:07,102 INFO L242 Difference]: Finished difference. Result has 686 places, 2201 transitions, 58637 flow [2022-07-13 22:20:07,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=43790, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=58637, PETRI_PLACES=686, PETRI_TRANSITIONS=2201} [2022-07-13 22:20:07,105 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 556 predicate places. [2022-07-13 22:20:07,105 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 2201 transitions, 58637 flow [2022-07-13 22:20:07,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 49.552083333333336) internal successors, (4757), 96 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) [2022-07-13 22:20:07,106 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:07,106 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:07,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:07,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:07,311 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -710578426, now seen corresponding path program 5 times [2022-07-13 22:20:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666101408] [2022-07-13 22:20:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666101408] [2022-07-13 22:20:08,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666101408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949127008] [2022-07-13 22:20:08,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:20:08,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:08,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:08,588 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) [2022-07-13 22:20:08,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:20:08,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:20:08,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-13 22:20:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:10,318 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:20:10,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:20:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:10,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:11,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:20:11,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-07-13 22:20:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:13,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949127008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:13,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:13,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 30] total 87 [2022-07-13 22:20:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205439931] [2022-07-13 22:20:13,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:13,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-13 22:20:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-13 22:20:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=6793, Unknown=0, NotChecked=0, Total=7482 [2022-07-13 22:20:13,819 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-13 22:20:13,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 2201 transitions, 58637 flow. Second operand has 87 states, 87 states have (on average 58.50574712643678) internal successors, (5090), 87 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:13,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:13,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-13 22:20:13,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:36,039 INFO L129 PetriNetUnfolder]: 11832/25644 cut-off events. [2022-07-13 22:20:36,039 INFO L130 PetriNetUnfolder]: For 918813/919135 co-relation queries the response was YES. [2022-07-13 22:20:36,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226604 conditions, 25644 events. 11832/25644 cut-off events. For 918813/919135 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 253616 event pairs, 3706 based on Foata normal form. 170/25564 useless extension candidates. Maximal degree in co-relation 226433. Up to 15955 conditions per place. [2022-07-13 22:20:36,847 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 1356 selfloop transitions, 1499 changer transitions 16/2917 dead transitions. [2022-07-13 22:20:36,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 2917 transitions, 79673 flow [2022-07-13 22:20:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-13 22:20:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-13 22:20:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4356 transitions. [2022-07-13 22:20:36,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42311801845556096 [2022-07-13 22:20:36,850 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4356 transitions. [2022-07-13 22:20:36,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4356 transitions. [2022-07-13 22:20:36,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:36,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4356 transitions. [2022-07-13 22:20:36,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 61.352112676056336) internal successors, (4356), 71 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:36,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 145.0) internal successors, (10440), 72 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:36,865 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 145.0) internal successors, (10440), 72 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:36,865 INFO L186 Difference]: Start difference. First operand has 686 places, 2201 transitions, 58637 flow. Second operand 71 states and 4356 transitions. [2022-07-13 22:20:36,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 2917 transitions, 79673 flow [2022-07-13 22:20:44,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 2917 transitions, 78725 flow, removed 115 selfloop flow, removed 50 redundant places. [2022-07-13 22:20:44,923 INFO L242 Difference]: Finished difference. Result has 731 places, 2672 transitions, 76193 flow [2022-07-13 22:20:44,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=57835, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=76193, PETRI_PLACES=731, PETRI_TRANSITIONS=2672} [2022-07-13 22:20:44,926 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 601 predicate places. [2022-07-13 22:20:44,926 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 2672 transitions, 76193 flow [2022-07-13 22:20:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 58.50574712643678) internal successors, (5090), 87 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:44,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:44,927 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:44,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:45,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:45,132 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2086134766, now seen corresponding path program 6 times [2022-07-13 22:20:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:45,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383133956] [2022-07-13 22:20:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:45,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:46,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383133956] [2022-07-13 22:20:46,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383133956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151416583] [2022-07-13 22:20:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:20:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:46,972 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) [2022-07-13 22:20:46,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:20:47,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:20:47,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:47,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-13 22:20:47,123 INFO L286 TraceCheckSpWp]: Computing forward predicates...