./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:21:27,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:21:27,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:21:27,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:21:27,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:21:27,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:21:27,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:21:27,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:21:27,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:21:27,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:21:27,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:21:27,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:21:27,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:21:27,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:21:27,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:21:27,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:21:27,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:21:27,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:21:27,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:21:27,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:21:27,863 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:21:27,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:21:27,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:21:27,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:21:27,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:21:27,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:21:27,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:21:27,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:21:27,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:21:27,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:21:27,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:21:27,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:21:27,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:21:27,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:21:27,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:21:27,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:21:27,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:21:27,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:21:27,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:21:27,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:21:27,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:21:27,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:21:27,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:21:27,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:21:27,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:21:27,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:21:27,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:21:27,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:21:27,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:21:27,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:21:27,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:21:27,907 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:21:27,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:21:27,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:21:27,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:21:27,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:21:27,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:21:27,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:21:27,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:21:27,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:21:27,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:21:27,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:21:27,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:21:27,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:21:27,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-07-19 21:21:28,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:21:28,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:21:28,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:21:28,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:21:28,175 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:21:28,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-07-19 21:21:28,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185ddd43c/46063f6686cf4ed09efd8549e9758ce6/FLAG42d51a987 [2022-07-19 21:21:28,593 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:21:28,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-07-19 21:21:28,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185ddd43c/46063f6686cf4ed09efd8549e9758ce6/FLAG42d51a987 [2022-07-19 21:21:28,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185ddd43c/46063f6686cf4ed09efd8549e9758ce6 [2022-07-19 21:21:28,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:21:28,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:21:28,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:21:28,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:21:28,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:21:28,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0c4ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28, skipping insertion in model container [2022-07-19 21:21:28,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:21:28,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:21:28,814 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/array-eq-trans.wvr.c[2737,2750] [2022-07-19 21:21:28,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:21:28,831 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:21:28,863 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/array-eq-trans.wvr.c[2737,2750] [2022-07-19 21:21:28,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:21:28,878 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:21:28,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28 WrapperNode [2022-07-19 21:21:28,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:21:28,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:21:28,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:21:28,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:21:28,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,928 INFO L137 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2022-07-19 21:21:28,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:21:28,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:21:28,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:21:28,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:21:28,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:28,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:29,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:21:29,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:21:29,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:21:29,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:21:29,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (1/1) ... [2022-07-19 21:21:29,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:21:29,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:29,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:21:29,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:21:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:21:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:21:29,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:21:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:21:29,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:21:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:21:29,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:21:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:21:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:21:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:21:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:21:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:21:29,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:21:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:21:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:21:29,056 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:21:29,122 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:21:29,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:21:29,416 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:21:29,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:21:29,424 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:21:29,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:21:29 BoogieIcfgContainer [2022-07-19 21:21:29,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:21:29,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:21:29,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:21:29,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:21:29,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:21:28" (1/3) ... [2022-07-19 21:21:29,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be9fa10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:21:29, skipping insertion in model container [2022-07-19 21:21:29,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:28" (2/3) ... [2022-07-19 21:21:29,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be9fa10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:21:29, skipping insertion in model container [2022-07-19 21:21:29,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:21:29" (3/3) ... [2022-07-19 21:21:29,432 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-07-19 21:21:29,436 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:21:29,442 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:21:29,442 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:21:29,442 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:21:29,517 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:21:29,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 306 transitions, 636 flow [2022-07-19 21:21:29,649 INFO L129 PetriNetUnfolder]: 30/303 cut-off events. [2022-07-19 21:21:29,652 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:21:29,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 303 events. 30/303 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 234 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2022-07-19 21:21:29,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 306 transitions, 636 flow [2022-07-19 21:21:29,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 292 transitions, 602 flow [2022-07-19 21:21:29,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:29,681 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@61b4cc5f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@534a99c0 [2022-07-19 21:21:29,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:21:29,742 INFO L129 PetriNetUnfolder]: 30/291 cut-off events. [2022-07-19 21:21:29,743 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:21:29,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:29,744 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:29,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1783638466, now seen corresponding path program 1 times [2022-07-19 21:21:29,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780270908] [2022-07-19 21:21:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:29,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:29,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780270908] [2022-07-19 21:21:29,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780270908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:29,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:29,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:21:29,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827412597] [2022-07-19 21:21:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:21:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:21:30,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:21:30,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 306 [2022-07-19 21:21:30,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 292 transitions, 602 flow. Second operand has 2 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:30,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 306 [2022-07-19 21:21:30,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:30,056 INFO L129 PetriNetUnfolder]: 15/277 cut-off events. [2022-07-19 21:21:30,056 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:21:30,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 277 events. 15/277 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 221 event pairs, 0 based on Foata normal form. 21/274 useless extension candidates. Maximal degree in co-relation 192. Up to 7 conditions per place. [2022-07-19 21:21:30,059 INFO L132 encePairwiseOnDemand]: 291/306 looper letters, 6 selfloop transitions, 0 changer transitions 9/277 dead transitions. [2022-07-19 21:21:30,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 277 transitions, 584 flow [2022-07-19 21:21:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:21:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:21:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 589 transitions. [2022-07-19 21:21:30,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9624183006535948 [2022-07-19 21:21:30,073 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 589 transitions. [2022-07-19 21:21:30,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 589 transitions. [2022-07-19 21:21:30,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:30,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 589 transitions. [2022-07-19 21:21:30,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 294.5) internal successors, (589), 2 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,088 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,089 INFO L186 Difference]: Start difference. First operand has 272 places, 292 transitions, 602 flow. Second operand 2 states and 589 transitions. [2022-07-19 21:21:30,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 277 transitions, 584 flow [2022-07-19 21:21:30,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 277 transitions, 572 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:30,100 INFO L242 Difference]: Finished difference. Result has 267 places, 268 transitions, 542 flow [2022-07-19 21:21:30,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=542, PETRI_PLACES=267, PETRI_TRANSITIONS=268} [2022-07-19 21:21:30,105 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -5 predicate places. [2022-07-19 21:21:30,105 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 268 transitions, 542 flow [2022-07-19 21:21:30,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,106 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:30,106 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:30,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:21:30,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 9750274, now seen corresponding path program 1 times [2022-07-19 21:21:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:30,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038746874] [2022-07-19 21:21:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:30,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038746874] [2022-07-19 21:21:30,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038746874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:30,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:21:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690640524] [2022-07-19 21:21:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:30,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:21:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:21:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:21:30,342 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 306 [2022-07-19 21:21:30,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 268 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:30,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 306 [2022-07-19 21:21:30,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:30,456 INFO L129 PetriNetUnfolder]: 14/272 cut-off events. [2022-07-19 21:21:30,456 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:21:30,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 272 events. 14/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 212 event pairs, 0 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 326. Up to 48 conditions per place. [2022-07-19 21:21:30,458 INFO L132 encePairwiseOnDemand]: 302/306 looper letters, 47 selfloop transitions, 0 changer transitions 4/271 dead transitions. [2022-07-19 21:21:30,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 271 transitions, 650 flow [2022-07-19 21:21:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:21:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:21:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1217 transitions. [2022-07-19 21:21:30,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954248366013071 [2022-07-19 21:21:30,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1217 transitions. [2022-07-19 21:21:30,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1217 transitions. [2022-07-19 21:21:30,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:30,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1217 transitions. [2022-07-19 21:21:30,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 243.4) internal successors, (1217), 5 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,468 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,468 INFO L186 Difference]: Start difference. First operand has 267 places, 268 transitions, 542 flow. Second operand 5 states and 1217 transitions. [2022-07-19 21:21:30,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 271 transitions, 650 flow [2022-07-19 21:21:30,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 271 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:30,474 INFO L242 Difference]: Finished difference. Result has 265 places, 267 transitions, 546 flow [2022-07-19 21:21:30,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=265, PETRI_TRANSITIONS=267} [2022-07-19 21:21:30,475 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -7 predicate places. [2022-07-19 21:21:30,476 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 267 transitions, 546 flow [2022-07-19 21:21:30,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,477 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:30,477 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:30,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:21:30,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1489232946, now seen corresponding path program 1 times [2022-07-19 21:21:30,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:30,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016375949] [2022-07-19 21:21:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:30,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016375949] [2022-07-19 21:21:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016375949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:30,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:30,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:21:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547711846] [2022-07-19 21:21:30,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:30,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:21:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:30,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:21:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:21:30,724 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 306 [2022-07-19 21:21:30,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 267 transitions, 546 flow. Second operand has 7 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:30,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 306 [2022-07-19 21:21:30,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:31,009 INFO L129 PetriNetUnfolder]: 225/996 cut-off events. [2022-07-19 21:21:31,009 INFO L130 PetriNetUnfolder]: For 44/57 co-relation queries the response was YES. [2022-07-19 21:21:31,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 996 events. 225/996 cut-off events. For 44/57 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4730 event pairs, 52 based on Foata normal form. 1/879 useless extension candidates. Maximal degree in co-relation 1438. Up to 157 conditions per place. [2022-07-19 21:21:31,020 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 93 selfloop transitions, 13 changer transitions 4/336 dead transitions. [2022-07-19 21:21:31,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 336 transitions, 916 flow [2022-07-19 21:21:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2343 transitions. [2022-07-19 21:21:31,024 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8507625272331155 [2022-07-19 21:21:31,024 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2343 transitions. [2022-07-19 21:21:31,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2343 transitions. [2022-07-19 21:21:31,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:31,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2343 transitions. [2022-07-19 21:21:31,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 260.3333333333333) internal successors, (2343), 9 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,033 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,033 INFO L186 Difference]: Start difference. First operand has 265 places, 267 transitions, 546 flow. Second operand 9 states and 2343 transitions. [2022-07-19 21:21:31,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 336 transitions, 916 flow [2022-07-19 21:21:31,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 336 transitions, 906 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-07-19 21:21:31,039 INFO L242 Difference]: Finished difference. Result has 271 places, 275 transitions, 607 flow [2022-07-19 21:21:31,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=271, PETRI_TRANSITIONS=275} [2022-07-19 21:21:31,041 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -1 predicate places. [2022-07-19 21:21:31,041 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 275 transitions, 607 flow [2022-07-19 21:21:31,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:31,043 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:31,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:21:31,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:31,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:31,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1007150356, now seen corresponding path program 1 times [2022-07-19 21:21:31,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:31,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825584519] [2022-07-19 21:21:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:31,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:31,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:31,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825584519] [2022-07-19 21:21:31,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825584519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:31,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:31,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:21:31,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242615584] [2022-07-19 21:21:31,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:31,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:21:31,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:31,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:21:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:21:31,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-07-19 21:21:31,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 275 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:31,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-07-19 21:21:31,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:31,229 INFO L129 PetriNetUnfolder]: 26/457 cut-off events. [2022-07-19 21:21:31,229 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 21:21:31,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 457 events. 26/457 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1045 event pairs, 0 based on Foata normal form. 3/430 useless extension candidates. Maximal degree in co-relation 611. Up to 87 conditions per place. [2022-07-19 21:21:31,231 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 51 selfloop transitions, 6 changer transitions 7/281 dead transitions. [2022-07-19 21:21:31,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 281 transitions, 755 flow [2022-07-19 21:21:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:21:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:21:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-07-19 21:21:31,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-07-19 21:21:31,234 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-07-19 21:21:31,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-07-19 21:21:31,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:31,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-07-19 21:21:31,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,239 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,239 INFO L186 Difference]: Start difference. First operand has 271 places, 275 transitions, 607 flow. Second operand 6 states and 1426 transitions. [2022-07-19 21:21:31,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 281 transitions, 755 flow [2022-07-19 21:21:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 281 transitions, 747 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:21:31,244 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 615 flow [2022-07-19 21:21:31,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=615, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-19 21:21:31,245 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 3 predicate places. [2022-07-19 21:21:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 615 flow [2022-07-19 21:21:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:31,246 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:21:31,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash 565775480, now seen corresponding path program 1 times [2022-07-19 21:21:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846783593] [2022-07-19 21:21:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:31,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846783593] [2022-07-19 21:21:31,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846783593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:31,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:31,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:21:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993912205] [2022-07-19 21:21:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:21:31,356 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-19 21:21:31,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:31,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-19 21:21:31,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:31,603 INFO L129 PetriNetUnfolder]: 189/1089 cut-off events. [2022-07-19 21:21:31,603 INFO L130 PetriNetUnfolder]: For 43/74 co-relation queries the response was YES. [2022-07-19 21:21:31,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 1089 events. 189/1089 cut-off events. For 43/74 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5504 event pairs, 56 based on Foata normal form. 2/957 useless extension candidates. Maximal degree in co-relation 1544. Up to 135 conditions per place. [2022-07-19 21:21:31,610 INFO L132 encePairwiseOnDemand]: 292/306 looper letters, 103 selfloop transitions, 14 changer transitions 2/325 dead transitions. [2022-07-19 21:21:31,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 325 transitions, 974 flow [2022-07-19 21:21:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:21:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:21:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2603 transitions. [2022-07-19 21:21:31,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.773321449792038 [2022-07-19 21:21:31,615 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2603 transitions. [2022-07-19 21:21:31,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2603 transitions. [2022-07-19 21:21:31,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:31,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2603 transitions. [2022-07-19 21:21:31,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 236.63636363636363) internal successors, (2603), 11 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,624 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,624 INFO L186 Difference]: Start difference. First operand has 275 places, 274 transitions, 615 flow. Second operand 11 states and 2603 transitions. [2022-07-19 21:21:31,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 325 transitions, 974 flow [2022-07-19 21:21:31,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 325 transitions, 956 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-19 21:21:31,630 INFO L242 Difference]: Finished difference. Result has 280 places, 278 transitions, 649 flow [2022-07-19 21:21:31,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=280, PETRI_TRANSITIONS=278} [2022-07-19 21:21:31,633 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 8 predicate places. [2022-07-19 21:21:31,633 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 278 transitions, 649 flow [2022-07-19 21:21:31,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:31,634 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:31,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:21:31,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1692416661, now seen corresponding path program 1 times [2022-07-19 21:21:31,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:31,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374362785] [2022-07-19 21:21:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:31,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:31,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:31,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374362785] [2022-07-19 21:21:31,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374362785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:31,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:31,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:21:31,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279340289] [2022-07-19 21:21:31,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:31,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:21:31,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:31,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:21:31,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:21:31,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-19 21:21:31,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 278 transitions, 649 flow. Second operand has 7 states, 7 states have (on average 238.14285714285714) internal successors, (1667), 7 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:31,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-19 21:21:31,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:32,027 INFO L129 PetriNetUnfolder]: 252/1683 cut-off events. [2022-07-19 21:21:32,028 INFO L130 PetriNetUnfolder]: For 181/198 co-relation queries the response was YES. [2022-07-19 21:21:32,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1683 events. 252/1683 cut-off events. For 181/198 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9746 event pairs, 86 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 2425. Up to 213 conditions per place. [2022-07-19 21:21:32,039 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 111 selfloop transitions, 14 changer transitions 3/342 dead transitions. [2022-07-19 21:21:32,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 342 transitions, 1082 flow [2022-07-19 21:21:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:21:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:21:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2438 transitions. [2022-07-19 21:21:32,043 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967320261437908 [2022-07-19 21:21:32,043 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2438 transitions. [2022-07-19 21:21:32,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2438 transitions. [2022-07-19 21:21:32,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:32,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2438 transitions. [2022-07-19 21:21:32,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.8) internal successors, (2438), 10 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,052 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,052 INFO L186 Difference]: Start difference. First operand has 280 places, 278 transitions, 649 flow. Second operand 10 states and 2438 transitions. [2022-07-19 21:21:32,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 342 transitions, 1082 flow [2022-07-19 21:21:32,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 342 transitions, 1069 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-19 21:21:32,085 INFO L242 Difference]: Finished difference. Result has 287 places, 283 transitions, 701 flow [2022-07-19 21:21:32,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=287, PETRI_TRANSITIONS=283} [2022-07-19 21:21:32,088 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 15 predicate places. [2022-07-19 21:21:32,088 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 283 transitions, 701 flow [2022-07-19 21:21:32,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.14285714285714) internal successors, (1667), 7 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,089 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:32,089 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:32,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:21:32,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1914456625, now seen corresponding path program 1 times [2022-07-19 21:21:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:32,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408348768] [2022-07-19 21:21:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408348768] [2022-07-19 21:21:32,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408348768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73561555] [2022-07-19 21:21:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:32,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:32,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:32,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:32,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:21:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:21:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:32,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:32,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73561555] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:32,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:32,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-19 21:21:32,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931471413] [2022-07-19 21:21:32,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:32,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-19 21:21:32,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 283 transitions, 701 flow. Second operand has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:32,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-19 21:21:32,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:33,488 INFO L129 PetriNetUnfolder]: 622/3678 cut-off events. [2022-07-19 21:21:33,489 INFO L130 PetriNetUnfolder]: For 324/346 co-relation queries the response was YES. [2022-07-19 21:21:33,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5485 conditions, 3678 events. 622/3678 cut-off events. For 324/346 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 29526 event pairs, 198 based on Foata normal form. 0/3349 useless extension candidates. Maximal degree in co-relation 5472. Up to 484 conditions per place. [2022-07-19 21:21:33,507 INFO L132 encePairwiseOnDemand]: 290/306 looper letters, 112 selfloop transitions, 25 changer transitions 0/348 dead transitions. [2022-07-19 21:21:33,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 348 transitions, 1127 flow [2022-07-19 21:21:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:21:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:21:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3524 transitions. [2022-07-19 21:21:33,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7677559912854031 [2022-07-19 21:21:33,514 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3524 transitions. [2022-07-19 21:21:33,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3524 transitions. [2022-07-19 21:21:33,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:33,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3524 transitions. [2022-07-19 21:21:33,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 234.93333333333334) internal successors, (3524), 15 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:33,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:33,536 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:33,536 INFO L186 Difference]: Start difference. First operand has 287 places, 283 transitions, 701 flow. Second operand 15 states and 3524 transitions. [2022-07-19 21:21:33,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 348 transitions, 1127 flow [2022-07-19 21:21:33,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 348 transitions, 1119 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:21:33,543 INFO L242 Difference]: Finished difference. Result has 306 places, 295 transitions, 820 flow [2022-07-19 21:21:33,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=820, PETRI_PLACES=306, PETRI_TRANSITIONS=295} [2022-07-19 21:21:33,544 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 34 predicate places. [2022-07-19 21:21:33,546 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 295 transitions, 820 flow [2022-07-19 21:21:33,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:33,547 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:33,547 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:33,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:33,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:33,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash -591311525, now seen corresponding path program 1 times [2022-07-19 21:21:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:33,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194903527] [2022-07-19 21:21:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:21:34,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194903527] [2022-07-19 21:21:34,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194903527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:34,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:34,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:21:34,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839575731] [2022-07-19 21:21:34,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:34,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:21:34,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:21:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:21:34,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-19 21:21:34,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 295 transitions, 820 flow. Second operand has 13 states, 13 states have (on average 197.07692307692307) internal successors, (2562), 13 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:34,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-19 21:21:34,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:35,153 INFO L129 PetriNetUnfolder]: 1582/7211 cut-off events. [2022-07-19 21:21:35,153 INFO L130 PetriNetUnfolder]: For 1785/1915 co-relation queries the response was YES. [2022-07-19 21:21:35,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12079 conditions, 7211 events. 1582/7211 cut-off events. For 1785/1915 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 69072 event pairs, 449 based on Foata normal form. 61/6755 useless extension candidates. Maximal degree in co-relation 12059. Up to 1131 conditions per place. [2022-07-19 21:21:35,201 INFO L132 encePairwiseOnDemand]: 280/306 looper letters, 162 selfloop transitions, 29 changer transitions 4/382 dead transitions. [2022-07-19 21:21:35,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 382 transitions, 1460 flow [2022-07-19 21:21:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 21:21:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-19 21:21:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3991 transitions. [2022-07-19 21:21:35,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.652124183006536 [2022-07-19 21:21:35,209 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3991 transitions. [2022-07-19 21:21:35,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3991 transitions. [2022-07-19 21:21:35,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:35,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3991 transitions. [2022-07-19 21:21:35,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 199.55) internal successors, (3991), 20 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,223 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,223 INFO L186 Difference]: Start difference. First operand has 306 places, 295 transitions, 820 flow. Second operand 20 states and 3991 transitions. [2022-07-19 21:21:35,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 382 transitions, 1460 flow [2022-07-19 21:21:35,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 382 transitions, 1449 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:21:35,233 INFO L242 Difference]: Finished difference. Result has 326 places, 303 transitions, 926 flow [2022-07-19 21:21:35,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=926, PETRI_PLACES=326, PETRI_TRANSITIONS=303} [2022-07-19 21:21:35,234 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-19 21:21:35,234 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 303 transitions, 926 flow [2022-07-19 21:21:35,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.07692307692307) internal successors, (2562), 13 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,235 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:35,235 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:35,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:21:35,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash -484011581, now seen corresponding path program 1 times [2022-07-19 21:21:35,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:35,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294791769] [2022-07-19 21:21:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:35,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:21:35,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:35,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294791769] [2022-07-19 21:21:35,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294791769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:35,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826186611] [2022-07-19 21:21:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:35,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:35,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:35,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:21:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:21:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:21:35,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:21:35,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826186611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:35,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:21:35,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-07-19 21:21:35,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830374320] [2022-07-19 21:21:35,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:35,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:21:35,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:21:35,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:21:35,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-19 21:21:35,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 303 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:35,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-19 21:21:35,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:36,495 INFO L129 PetriNetUnfolder]: 1266/7212 cut-off events. [2022-07-19 21:21:36,495 INFO L130 PetriNetUnfolder]: For 1948/1990 co-relation queries the response was YES. [2022-07-19 21:21:36,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11200 conditions, 7212 events. 1266/7212 cut-off events. For 1948/1990 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 71914 event pairs, 552 based on Foata normal form. 85/6699 useless extension candidates. Maximal degree in co-relation 11174. Up to 884 conditions per place. [2022-07-19 21:21:36,529 INFO L132 encePairwiseOnDemand]: 296/306 looper letters, 98 selfloop transitions, 11 changer transitions 2/342 dead transitions. [2022-07-19 21:21:36,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 342 transitions, 1263 flow [2022-07-19 21:21:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:21:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:21:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1950 transitions. [2022-07-19 21:21:36,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965686274509803 [2022-07-19 21:21:36,533 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1950 transitions. [2022-07-19 21:21:36,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1950 transitions. [2022-07-19 21:21:36,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:36,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1950 transitions. [2022-07-19 21:21:36,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 243.75) internal successors, (1950), 8 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:36,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:36,539 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:36,539 INFO L186 Difference]: Start difference. First operand has 326 places, 303 transitions, 926 flow. Second operand 8 states and 1950 transitions. [2022-07-19 21:21:36,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 342 transitions, 1263 flow [2022-07-19 21:21:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 342 transitions, 1219 flow, removed 6 selfloop flow, removed 13 redundant places. [2022-07-19 21:21:36,551 INFO L242 Difference]: Finished difference. Result has 320 places, 305 transitions, 922 flow [2022-07-19 21:21:36,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=922, PETRI_PLACES=320, PETRI_TRANSITIONS=305} [2022-07-19 21:21:36,552 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 48 predicate places. [2022-07-19 21:21:36,552 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 305 transitions, 922 flow [2022-07-19 21:21:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:36,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:36,553 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:36,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:36,756 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,SelfDestructingSolverStorable8 [2022-07-19 21:21:36,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:36,757 INFO L85 PathProgramCache]: Analyzing trace with hash -541306598, now seen corresponding path program 1 times [2022-07-19 21:21:36,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:36,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658325075] [2022-07-19 21:21:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:36,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:21:36,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:36,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658325075] [2022-07-19 21:21:36,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658325075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:36,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:36,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:21:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729971221] [2022-07-19 21:21:36,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:36,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:21:36,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:21:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:21:36,821 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-19 21:21:36,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 305 transitions, 922 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:36,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:36,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-19 21:21:36,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:37,360 INFO L129 PetriNetUnfolder]: 383/3677 cut-off events. [2022-07-19 21:21:37,360 INFO L130 PetriNetUnfolder]: For 992/1125 co-relation queries the response was YES. [2022-07-19 21:21:37,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 3677 events. 383/3677 cut-off events. For 992/1125 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 30511 event pairs, 151 based on Foata normal form. 10/3439 useless extension candidates. Maximal degree in co-relation 5445. Up to 408 conditions per place. [2022-07-19 21:21:37,390 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 80 selfloop transitions, 11 changer transitions 41/362 dead transitions. [2022-07-19 21:21:37,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 362 transitions, 1393 flow [2022-07-19 21:21:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:21:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:21:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2434 transitions. [2022-07-19 21:21:37,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954248366013071 [2022-07-19 21:21:37,395 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2434 transitions. [2022-07-19 21:21:37,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2434 transitions. [2022-07-19 21:21:37,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:37,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2434 transitions. [2022-07-19 21:21:37,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.4) internal successors, (2434), 10 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,404 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,405 INFO L186 Difference]: Start difference. First operand has 320 places, 305 transitions, 922 flow. Second operand 10 states and 2434 transitions. [2022-07-19 21:21:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 362 transitions, 1393 flow [2022-07-19 21:21:37,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 362 transitions, 1375 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:21:37,413 INFO L242 Difference]: Finished difference. Result has 326 places, 302 transitions, 913 flow [2022-07-19 21:21:37,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=913, PETRI_PLACES=326, PETRI_TRANSITIONS=302} [2022-07-19 21:21:37,415 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-19 21:21:37,415 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 302 transitions, 913 flow [2022-07-19 21:21:37,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,416 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:37,416 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:37,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:21:37,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -671641809, now seen corresponding path program 1 times [2022-07-19 21:21:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:37,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332993104] [2022-07-19 21:21:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:21:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:37,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332993104] [2022-07-19 21:21:37,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332993104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:37,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180324464] [2022-07-19 21:21:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:37,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:37,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:37,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:37,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:21:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:37,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:21:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:21:37,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:21:38,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180324464] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:38,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:38,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-19 21:21:38,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698885417] [2022-07-19 21:21:38,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:38,124 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-19 21:21:38,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 302 transitions, 913 flow. Second operand has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:38,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:38,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-19 21:21:38,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:38,568 INFO L129 PetriNetUnfolder]: 363/3496 cut-off events. [2022-07-19 21:21:38,568 INFO L130 PetriNetUnfolder]: For 1105/1214 co-relation queries the response was YES. [2022-07-19 21:21:38,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5337 conditions, 3496 events. 363/3496 cut-off events. For 1105/1214 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 29275 event pairs, 121 based on Foata normal form. 23/3284 useless extension candidates. Maximal degree in co-relation 5309. Up to 393 conditions per place. [2022-07-19 21:21:38,589 INFO L132 encePairwiseOnDemand]: 295/306 looper letters, 96 selfloop transitions, 17 changer transitions 6/330 dead transitions. [2022-07-19 21:21:38,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 330 transitions, 1221 flow [2022-07-19 21:21:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:21:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:21:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2591 transitions. [2022-07-19 21:21:38,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7697563874034462 [2022-07-19 21:21:38,593 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2591 transitions. [2022-07-19 21:21:38,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2591 transitions. [2022-07-19 21:21:38,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:38,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2591 transitions. [2022-07-19 21:21:38,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 235.54545454545453) internal successors, (2591), 11 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:38,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:38,600 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:38,600 INFO L186 Difference]: Start difference. First operand has 326 places, 302 transitions, 913 flow. Second operand 11 states and 2591 transitions. [2022-07-19 21:21:38,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 330 transitions, 1221 flow [2022-07-19 21:21:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 330 transitions, 1171 flow, removed 6 selfloop flow, removed 13 redundant places. [2022-07-19 21:21:38,608 INFO L242 Difference]: Finished difference. Result has 320 places, 296 transitions, 879 flow [2022-07-19 21:21:38,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=879, PETRI_PLACES=320, PETRI_TRANSITIONS=296} [2022-07-19 21:21:38,608 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 48 predicate places. [2022-07-19 21:21:38,609 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 296 transitions, 879 flow [2022-07-19 21:21:38,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:38,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:38,609 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:38,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:38,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:38,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 45230378, now seen corresponding path program 1 times [2022-07-19 21:21:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:38,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340246015] [2022-07-19 21:21:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340246015] [2022-07-19 21:21:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340246015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:38,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:38,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:21:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547649867] [2022-07-19 21:21:38,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:21:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:21:38,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:21:38,903 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-07-19 21:21:38,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 296 transitions, 879 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:38,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:38,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-07-19 21:21:38,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:39,186 INFO L129 PetriNetUnfolder]: 60/2324 cut-off events. [2022-07-19 21:21:39,186 INFO L130 PetriNetUnfolder]: For 494/503 co-relation queries the response was YES. [2022-07-19 21:21:39,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 2324 events. 60/2324 cut-off events. For 494/503 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 18121 event pairs, 0 based on Foata normal form. 27/2256 useless extension candidates. Maximal degree in co-relation 3723. Up to 577 conditions per place. [2022-07-19 21:21:39,195 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 52 selfloop transitions, 5 changer transitions 7/302 dead transitions. [2022-07-19 21:21:39,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 302 transitions, 1030 flow [2022-07-19 21:21:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:21:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:21:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-07-19 21:21:39,197 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-07-19 21:21:39,197 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-07-19 21:21:39,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-07-19 21:21:39,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:39,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-07-19 21:21:39,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,202 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,202 INFO L186 Difference]: Start difference. First operand has 320 places, 296 transitions, 879 flow. Second operand 6 states and 1426 transitions. [2022-07-19 21:21:39,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 302 transitions, 1030 flow [2022-07-19 21:21:39,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 302 transitions, 990 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-07-19 21:21:39,208 INFO L242 Difference]: Finished difference. Result has 314 places, 295 transitions, 853 flow [2022-07-19 21:21:39,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=853, PETRI_PLACES=314, PETRI_TRANSITIONS=295} [2022-07-19 21:21:39,209 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 42 predicate places. [2022-07-19 21:21:39,209 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 295 transitions, 853 flow [2022-07-19 21:21:39,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:39,210 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:21:39,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash -940246847, now seen corresponding path program 1 times [2022-07-19 21:21:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:39,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334089664] [2022-07-19 21:21:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:21:39,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334089664] [2022-07-19 21:21:39,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334089664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279965080] [2022-07-19 21:21:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:39,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:39,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:39,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:39,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:21:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:21:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:39,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:21:39,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279965080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:39,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:21:39,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2022-07-19 21:21:39,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868660106] [2022-07-19 21:21:39,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:39,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:39,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:21:39,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-19 21:21:39,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 295 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:39,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-19 21:21:39,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:40,198 INFO L129 PetriNetUnfolder]: 749/3930 cut-off events. [2022-07-19 21:21:40,199 INFO L130 PetriNetUnfolder]: For 1235/1255 co-relation queries the response was YES. [2022-07-19 21:21:40,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 3930 events. 749/3930 cut-off events. For 1235/1255 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 34531 event pairs, 269 based on Foata normal form. 15/3552 useless extension candidates. Maximal degree in co-relation 6218. Up to 651 conditions per place. [2022-07-19 21:21:40,221 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 86 selfloop transitions, 8 changer transitions 11/325 dead transitions. [2022-07-19 21:21:40,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 325 transitions, 1139 flow [2022-07-19 21:21:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2135 transitions. [2022-07-19 21:21:40,223 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752360203340596 [2022-07-19 21:21:40,224 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2135 transitions. [2022-07-19 21:21:40,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2135 transitions. [2022-07-19 21:21:40,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:40,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2135 transitions. [2022-07-19 21:21:40,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.22222222222223) internal successors, (2135), 9 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:40,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:40,229 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:40,229 INFO L186 Difference]: Start difference. First operand has 314 places, 295 transitions, 853 flow. Second operand 9 states and 2135 transitions. [2022-07-19 21:21:40,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 325 transitions, 1139 flow [2022-07-19 21:21:40,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 325 transitions, 1123 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-19 21:21:40,237 INFO L242 Difference]: Finished difference. Result has 316 places, 294 transitions, 853 flow [2022-07-19 21:21:40,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=853, PETRI_PLACES=316, PETRI_TRANSITIONS=294} [2022-07-19 21:21:40,238 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 44 predicate places. [2022-07-19 21:21:40,238 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 294 transitions, 853 flow [2022-07-19 21:21:40,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:40,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:40,239 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:40,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:40,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:40,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1218469367, now seen corresponding path program 1 times [2022-07-19 21:21:40,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:40,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557159415] [2022-07-19 21:21:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:40,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557159415] [2022-07-19 21:21:40,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557159415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171742795] [2022-07-19 21:21:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:40,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:40,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:40,545 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) [2022-07-19 21:21:40,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:21:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:21:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:41,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:41,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171742795] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:41,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:41,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 27 [2022-07-19 21:21:41,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036917519] [2022-07-19 21:21:41,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:41,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:21:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:21:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-07-19 21:21:41,478 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-07-19 21:21:41,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 294 transitions, 853 flow. Second operand has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:41,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:41,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-07-19 21:21:41,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:42,187 INFO L129 PetriNetUnfolder]: 1313/5654 cut-off events. [2022-07-19 21:21:42,188 INFO L130 PetriNetUnfolder]: For 2150/2225 co-relation queries the response was YES. [2022-07-19 21:21:42,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9797 conditions, 5654 events. 1313/5654 cut-off events. For 2150/2225 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 52443 event pairs, 404 based on Foata normal form. 58/5327 useless extension candidates. Maximal degree in co-relation 9771. Up to 800 conditions per place. [2022-07-19 21:21:42,226 INFO L132 encePairwiseOnDemand]: 290/306 looper letters, 130 selfloop transitions, 13 changer transitions 5/356 dead transitions. [2022-07-19 21:21:42,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 356 transitions, 1342 flow [2022-07-19 21:21:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:21:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:21:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3392 transitions. [2022-07-19 21:21:42,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7389978213507625 [2022-07-19 21:21:42,234 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3392 transitions. [2022-07-19 21:21:42,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3392 transitions. [2022-07-19 21:21:42,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:42,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3392 transitions. [2022-07-19 21:21:42,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 226.13333333333333) internal successors, (3392), 15 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,244 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,244 INFO L186 Difference]: Start difference. First operand has 316 places, 294 transitions, 853 flow. Second operand 15 states and 3392 transitions. [2022-07-19 21:21:42,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 356 transitions, 1342 flow [2022-07-19 21:21:42,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 356 transitions, 1306 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-07-19 21:21:42,254 INFO L242 Difference]: Finished difference. Result has 325 places, 296 transitions, 881 flow [2022-07-19 21:21:42,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=881, PETRI_PLACES=325, PETRI_TRANSITIONS=296} [2022-07-19 21:21:42,254 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 53 predicate places. [2022-07-19 21:21:42,255 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 296 transitions, 881 flow [2022-07-19 21:21:42,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,255 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:42,255 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:42,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:21:42,470 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -36899099, now seen corresponding path program 1 times [2022-07-19 21:21:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785378836] [2022-07-19 21:21:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:21:42,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:42,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785378836] [2022-07-19 21:21:42,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785378836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075824453] [2022-07-19 21:21:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:42,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:42,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:42,552 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) [2022-07-19 21:21:42,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:21:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:21:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:21:42,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:21:43,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075824453] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:43,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:43,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-19 21:21:43,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860592952] [2022-07-19 21:21:43,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:43,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:43,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-19 21:21:43,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 296 transitions, 881 flow. Second operand has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:43,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-19 21:21:43,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:43,879 INFO L129 PetriNetUnfolder]: 792/4472 cut-off events. [2022-07-19 21:21:43,879 INFO L130 PetriNetUnfolder]: For 1858/1941 co-relation queries the response was YES. [2022-07-19 21:21:43,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7486 conditions, 4472 events. 792/4472 cut-off events. For 1858/1941 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 40822 event pairs, 300 based on Foata normal form. 72/4086 useless extension candidates. Maximal degree in co-relation 7457. Up to 622 conditions per place. [2022-07-19 21:21:43,904 INFO L132 encePairwiseOnDemand]: 291/306 looper letters, 92 selfloop transitions, 19 changer transitions 0/334 dead transitions. [2022-07-19 21:21:43,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 334 transitions, 1217 flow [2022-07-19 21:21:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:21:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:21:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3039 transitions. [2022-07-19 21:21:43,908 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7639517345399698 [2022-07-19 21:21:43,908 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3039 transitions. [2022-07-19 21:21:43,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3039 transitions. [2022-07-19 21:21:43,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:43,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3039 transitions. [2022-07-19 21:21:43,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.76923076923077) internal successors, (3039), 13 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,916 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,917 INFO L186 Difference]: Start difference. First operand has 325 places, 296 transitions, 881 flow. Second operand 13 states and 3039 transitions. [2022-07-19 21:21:43,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 334 transitions, 1217 flow [2022-07-19 21:21:43,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 334 transitions, 1183 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-19 21:21:43,926 INFO L242 Difference]: Finished difference. Result has 326 places, 303 transitions, 930 flow [2022-07-19 21:21:43,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=930, PETRI_PLACES=326, PETRI_TRANSITIONS=303} [2022-07-19 21:21:43,927 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-19 21:21:43,927 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 303 transitions, 930 flow [2022-07-19 21:21:43,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:43,927 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:43,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 21:21:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:21:44,143 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -864065180, now seen corresponding path program 1 times [2022-07-19 21:21:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379332852] [2022-07-19 21:21:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:21:44,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:44,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379332852] [2022-07-19 21:21:44,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379332852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:44,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320390924] [2022-07-19 21:21:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:44,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:44,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:44,255 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) [2022-07-19 21:21:44,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:21:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:21:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:21:44,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:21:45,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320390924] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:45,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:45,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 25 [2022-07-19 21:21:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729293184] [2022-07-19 21:21:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:45,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:21:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:45,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:21:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:21:45,352 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-07-19 21:21:45,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 303 transitions, 930 flow. Second operand has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:45,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:45,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-07-19 21:21:45,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:46,159 INFO L129 PetriNetUnfolder]: 1240/6600 cut-off events. [2022-07-19 21:21:46,160 INFO L130 PetriNetUnfolder]: For 3856/4031 co-relation queries the response was YES. [2022-07-19 21:21:46,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11898 conditions, 6600 events. 1240/6600 cut-off events. For 3856/4031 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 64529 event pairs, 444 based on Foata normal form. 161/6417 useless extension candidates. Maximal degree in co-relation 11870. Up to 956 conditions per place. [2022-07-19 21:21:46,188 INFO L132 encePairwiseOnDemand]: 292/306 looper letters, 143 selfloop transitions, 12 changer transitions 9/374 dead transitions. [2022-07-19 21:21:46,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 374 transitions, 1524 flow [2022-07-19 21:21:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:21:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:21:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2956 transitions. [2022-07-19 21:21:46,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.743086978381096 [2022-07-19 21:21:46,191 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2956 transitions. [2022-07-19 21:21:46,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2956 transitions. [2022-07-19 21:21:46,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:46,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2956 transitions. [2022-07-19 21:21:46,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 227.3846153846154) internal successors, (2956), 13 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:46,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:46,198 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:46,198 INFO L186 Difference]: Start difference. First operand has 326 places, 303 transitions, 930 flow. Second operand 13 states and 2956 transitions. [2022-07-19 21:21:46,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 374 transitions, 1524 flow [2022-07-19 21:21:46,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 374 transitions, 1501 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:46,211 INFO L242 Difference]: Finished difference. Result has 338 places, 305 transitions, 954 flow [2022-07-19 21:21:46,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=954, PETRI_PLACES=338, PETRI_TRANSITIONS=305} [2022-07-19 21:21:46,211 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 66 predicate places. [2022-07-19 21:21:46,212 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 305 transitions, 954 flow [2022-07-19 21:21:46,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:46,212 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:46,212 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:46,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:46,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:46,424 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:21:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1537255849, now seen corresponding path program 1 times [2022-07-19 21:21:46,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:46,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644771837] [2022-07-19 21:21:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:47,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:47,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644771837] [2022-07-19 21:21:47,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644771837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:47,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920805410] [2022-07-19 21:21:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:47,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:47,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:47,282 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) [2022-07-19 21:21:47,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:21:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 21:21:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:48,440 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 21:21:48,440 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 26 treesize of output 10 [2022-07-19 21:21:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:48,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:50,327 INFO L356 Elim1Store]: treesize reduction 62, result has 77.6 percent of original size [2022-07-19 21:21:50,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 226 [2022-07-19 21:21:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:21:51,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920805410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:51,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:51,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 13] total 42 [2022-07-19 21:21:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662878752] [2022-07-19 21:21:51,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:51,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 21:21:51,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 21:21:51,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1503, Unknown=1, NotChecked=0, Total=1722 [2022-07-19 21:21:51,802 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-19 21:21:51,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 305 transitions, 954 flow. Second operand has 42 states, 42 states have (on average 194.76190476190476) internal successors, (8180), 42 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:51,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:51,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-19 21:21:51,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:17,836 INFO L129 PetriNetUnfolder]: 134232/212146 cut-off events. [2022-07-19 21:22:17,836 INFO L130 PetriNetUnfolder]: For 177761/177761 co-relation queries the response was YES. [2022-07-19 21:22:19,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487849 conditions, 212146 events. 134232/212146 cut-off events. For 177761/177761 co-relation queries the response was YES. Maximal size of possible extension queue 6132. Compared 1980921 event pairs, 16534 based on Foata normal form. 0/198627 useless extension candidates. Maximal degree in co-relation 487815. Up to 56933 conditions per place. [2022-07-19 21:22:20,191 INFO L132 encePairwiseOnDemand]: 257/306 looper letters, 1425 selfloop transitions, 355 changer transitions 61/2029 dead transitions. [2022-07-19 21:22:20,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2029 transitions, 9935 flow [2022-07-19 21:22:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-19 21:22:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-07-19 21:22:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 22057 transitions. [2022-07-19 21:22:20,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6800160315698607 [2022-07-19 21:22:20,206 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 22057 transitions. [2022-07-19 21:22:20,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 22057 transitions. [2022-07-19 21:22:20,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:20,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 22057 transitions. [2022-07-19 21:22:20,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 208.08490566037736) internal successors, (22057), 106 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:20,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:20,254 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:20,254 INFO L186 Difference]: Start difference. First operand has 338 places, 305 transitions, 954 flow. Second operand 106 states and 22057 transitions. [2022-07-19 21:22:20,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2029 transitions, 9935 flow [2022-07-19 21:22:23,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2029 transitions, 9887 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-07-19 21:22:23,064 INFO L242 Difference]: Finished difference. Result has 502 places, 650 transitions, 4042 flow [2022-07-19 21:22:23,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=4042, PETRI_PLACES=502, PETRI_TRANSITIONS=650} [2022-07-19 21:22:23,064 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 230 predicate places. [2022-07-19 21:22:23,064 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 650 transitions, 4042 flow [2022-07-19 21:22:23,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 194.76190476190476) internal successors, (8180), 42 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:23,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:23,066 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:23,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:23,266 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,SelfDestructingSolverStorable16 [2022-07-19 21:22:23,266 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:22:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash 109038267, now seen corresponding path program 2 times [2022-07-19 21:22:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:23,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764494114] [2022-07-19 21:22:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:23,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:22:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764494114] [2022-07-19 21:22:24,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764494114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:24,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:24,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-19 21:22:24,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234548399] [2022-07-19 21:22:24,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:24,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 21:22:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 21:22:24,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-07-19 21:22:24,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-19 21:22:24,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 650 transitions, 4042 flow. Second operand has 29 states, 29 states have (on average 193.79310344827587) internal successors, (5620), 29 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:24,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:24,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-19 21:22:24,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand