./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8 --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 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 21:32:25,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:32:25,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:32:25,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:32:25,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:32:25,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:32:25,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:32:25,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:32:25,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:32:25,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:32:25,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:32:25,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:32:25,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:32:25,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:32:25,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:32:25,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:32:25,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:32:25,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:32:25,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:32:25,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:32:25,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:32:25,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:32:25,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:32:25,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:32:25,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:32:25,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:32:25,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:32:25,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:32:25,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:32:25,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:32:25,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:32:25,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:32:25,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:32:25,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:32:25,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:32:25,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:32:25,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:32:25,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:32:25,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:32:25,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:32:25,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:32:25,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:32:25,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:32:25,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:32:25,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:32:25,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:32:25,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:32:25,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:32:25,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:32:25,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:32:25,976 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:32:25,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:32:25,976 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:32:25,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:32:25,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:32:25,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:32:25,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:32:25,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:32:25,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:32:25,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:32:25,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:32:25,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:32:25,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:32:25,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:32:25,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:32:25,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:32:25,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:32:25,979 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:32:25,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:32:25,980 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:32:25,980 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 [2022-12-13 21:32:26,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:32:26,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:32:26,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:32:26,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:32:26,178 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:32:26,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-12-13 21:32:28,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:32:28,986 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:32:28,986 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-12-13 21:32:28,997 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/data/ba69b5ff5/56b48d1ecf1d4e8988dc24757f1672d2/FLAGa73a8e38c [2022-12-13 21:32:29,010 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/data/ba69b5ff5/56b48d1ecf1d4e8988dc24757f1672d2 [2022-12-13 21:32:29,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:32:29,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:32:29,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:32:29,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:32:29,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:32:29,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa1bd5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29, skipping insertion in model container [2022-12-13 21:32:29,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:32:29,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:32:29,294 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-12-13 21:32:29,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:32:29,312 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:32:29,348 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-12-13 21:32:29,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:32:29,380 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:32:29,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29 WrapperNode [2022-12-13 21:32:29,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:32:29,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:32:29,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:32:29,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:32:29,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,421 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2022-12-13 21:32:29,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:32:29,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:32:29,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:32:29,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:32:29,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:32:29,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:32:29,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:32:29,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:32:29,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (1/1) ... [2022-12-13 21:32:29,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:32:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:32:29,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:32:29,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ba043b2-f505-467a-9460-b9c47a8cd4e5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:32:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:32:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 21:32:29,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 21:32:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:32:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:32:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:32:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:32:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:32:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:32:29,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:32:29,512 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 21:32:29,614 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:32:29,616 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:32:29,750 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:32:29,777 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:32:29,777 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 21:32:29,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:32:29 BoogieIcfgContainer [2022-12-13 21:32:29,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:32:29,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:32:29,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:32:29,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:32:29,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:32:29" (1/3) ... [2022-12-13 21:32:29,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0422a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:32:29, skipping insertion in model container [2022-12-13 21:32:29,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:32:29" (2/3) ... [2022-12-13 21:32:29,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0422a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:32:29, skipping insertion in model container [2022-12-13 21:32:29,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:32:29" (3/3) ... [2022-12-13 21:32:29,787 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2022-12-13 21:32:29,795 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:32:29,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:32:29,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:32:29,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:32:29,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 21:32:29,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-12-13 21:32:29,927 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-12-13 21:32:29,928 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:32:29,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2022-12-13 21:32:29,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-12-13 21:32:29,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-12-13 21:32:29,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:32:29,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 79 transitions, 163 flow [2022-12-13 21:32:29,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 79 transitions, 163 flow [2022-12-13 21:32:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-12-13 21:32:29,970 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-12-13 21:32:29,970 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:32:29,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2022-12-13 21:32:29,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2022-12-13 21:32:31,983 INFO L134 LiptonReduction]: Checked pairs total: 1178 [2022-12-13 21:32:31,983 INFO L136 LiptonReduction]: Total number of compositions: 85 [2022-12-13 21:32:31,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:32:32,003 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f34d262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:32:32,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 21:32:32,007 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2022-12-13 21:32:32,007 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:32:32,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:32,008 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:32:32,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:32:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 374485506, now seen corresponding path program 1 times [2022-12-13 21:32:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:32,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854030907] [2022-12-13 21:32:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:32:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854030907] [2022-12-13 21:32:32,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854030907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:32,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:32,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:32:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515742001] [2022-12-13 21:32:32,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:32:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:32:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:32:32,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 164 [2022-12-13 21:32:32,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:32,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:32,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 164 [2022-12-13 21:32:32,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:32,241 INFO L130 PetriNetUnfolder]: 7/19 cut-off events. [2022-12-13 21:32:32,241 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:32:32,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2022-12-13 21:32:32,242 INFO L137 encePairwiseOnDemand]: 162/164 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2022-12-13 21:32:32,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2022-12-13 21:32:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:32:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 21:32:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 149 transitions. [2022-12-13 21:32:32,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2022-12-13 21:32:32,253 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 149 transitions. [2022-12-13 21:32:32,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 149 transitions. [2022-12-13 21:32:32,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:32,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 149 transitions. [2022-12-13 21:32:32,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:32,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:32,261 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:32,262 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 149 transitions. [2022-12-13 21:32:32,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2022-12-13 21:32:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:32:32,265 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 21 flow [2022-12-13 21:32:32,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2022-12-13 21:32:32,269 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2022-12-13 21:32:32,269 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 21 flow [2022-12-13 21:32:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:32,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:32,269 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 21:32:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:32:32,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:32:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1275911869, now seen corresponding path program 1 times [2022-12-13 21:32:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:32,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98532742] [2022-12-13 21:32:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:32,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:32:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:32,310 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:32:32,310 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:32:32,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 21:32:32,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 21:32:32,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 21:32:32,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:32:32,314 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 21:32:32,316 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:32:32,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 21:32:32,337 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 21:32:32,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-12-13 21:32:32,363 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2022-12-13 21:32:32,364 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:32:32,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 244 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-12-13 21:32:32,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 121 transitions, 254 flow [2022-12-13 21:32:32,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 121 transitions, 254 flow [2022-12-13 21:32:32,366 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:32:32,366 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 121 transitions, 254 flow [2022-12-13 21:32:32,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 121 transitions, 254 flow [2022-12-13 21:32:32,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-12-13 21:32:32,388 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2022-12-13 21:32:32,388 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:32:32,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 244 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-12-13 21:32:32,391 INFO L119 LiptonReduction]: Number of co-enabled transitions 5740 [2022-12-13 21:32:34,035 INFO L134 LiptonReduction]: Checked pairs total: 9559 [2022-12-13 21:32:34,035 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-12-13 21:32:34,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:32:34,039 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f34d262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:32:34,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 21:32:34,042 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-12-13 21:32:34,042 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 21:32:34,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:34,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:34,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 21:32:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash -869229803, now seen corresponding path program 1 times [2022-12-13 21:32:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:34,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942291563] [2022-12-13 21:32:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:32:34,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:34,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942291563] [2022-12-13 21:32:34,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942291563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:34,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:34,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:32:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097618062] [2022-12-13 21:32:34,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:32:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:32:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:32:34,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 236 [2022-12-13 21:32:34,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:34,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:34,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 236 [2022-12-13 21:32:34,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:34,242 INFO L130 PetriNetUnfolder]: 340/593 cut-off events. [2022-12-13 21:32:34,243 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-12-13 21:32:34,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 593 events. 340/593 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2731 event pairs, 144 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 720. Up to 351 conditions per place. [2022-12-13 21:32:34,246 INFO L137 encePairwiseOnDemand]: 229/236 looper letters, 31 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 21:32:34,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2022-12-13 21:32:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:32:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:32:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-12-13 21:32:34,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4576271186440678 [2022-12-13 21:32:34,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-12-13 21:32:34,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-12-13 21:32:34,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:34,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-12-13 21:32:34,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:34,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:34,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:34,251 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 324 transitions. [2022-12-13 21:32:34,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2022-12-13 21:32:34,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 21:32:34,252 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2022-12-13 21:32:34,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2022-12-13 21:32:34,253 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-12-13 21:32:34,253 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2022-12-13 21:32:34,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:34,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:34,253 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 21:32:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:32:34,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 21:32:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1662235193, now seen corresponding path program 1 times [2022-12-13 21:32:34,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165082215] [2022-12-13 21:32:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:34,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:32:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:34,274 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:32:34,275 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:32:34,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 21:32:34,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 21:32:34,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 21:32:34,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 21:32:34,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:32:34,275 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 21:32:34,276 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:32:34,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 21:32:34,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 21:32:34,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-12-13 21:32:34,326 INFO L130 PetriNetUnfolder]: 19/200 cut-off events. [2022-12-13 21:32:34,327 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 21:32:34,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 200 events. 19/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 463 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2022-12-13 21:32:34,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 163 transitions, 347 flow [2022-12-13 21:32:34,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 163 transitions, 347 flow [2022-12-13 21:32:34,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:32:34,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 163 transitions, 347 flow [2022-12-13 21:32:34,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 163 transitions, 347 flow [2022-12-13 21:32:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-12-13 21:32:34,354 INFO L130 PetriNetUnfolder]: 19/200 cut-off events. [2022-12-13 21:32:34,355 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 21:32:34,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 200 events. 19/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 463 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2022-12-13 21:32:34,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 13776 [2022-12-13 21:32:36,512 INFO L134 LiptonReduction]: Checked pairs total: 23113 [2022-12-13 21:32:36,512 INFO L136 LiptonReduction]: Total number of compositions: 156 [2022-12-13 21:32:36,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:32:36,514 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f34d262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:32:36,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 21:32:36,516 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-12-13 21:32:36,516 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 21:32:36,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:36,517 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:36,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:32:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1440491646, now seen corresponding path program 1 times [2022-12-13 21:32:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:36,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905197065] [2022-12-13 21:32:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:32:36,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905197065] [2022-12-13 21:32:36,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905197065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:36,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:36,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:32:36,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756179605] [2022-12-13 21:32:36,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:32:36,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:32:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:32:36,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 319 [2022-12-13 21:32:36,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:36,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:36,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 319 [2022-12-13 21:32:36,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:37,115 INFO L130 PetriNetUnfolder]: 5083/7355 cut-off events. [2022-12-13 21:32:37,116 INFO L131 PetriNetUnfolder]: For 736/736 co-relation queries the response was YES. [2022-12-13 21:32:37,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 7355 events. 5083/7355 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42352 event pairs, 2162 based on Foata normal form. 0/5679 useless extension candidates. Maximal degree in co-relation 1790. Up to 4309 conditions per place. [2022-12-13 21:32:37,175 INFO L137 encePairwiseOnDemand]: 311/319 looper letters, 49 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2022-12-13 21:32:37,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 267 flow [2022-12-13 21:32:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:32:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:32:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2022-12-13 21:32:37,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46499477533960293 [2022-12-13 21:32:37,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2022-12-13 21:32:37,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2022-12-13 21:32:37,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:37,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2022-12-13 21:32:37,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:37,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:37,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:37,188 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 445 transitions. [2022-12-13 21:32:37,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 267 flow [2022-12-13 21:32:37,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 259 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 21:32:37,193 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2022-12-13 21:32:37,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-12-13 21:32:37,194 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2022-12-13 21:32:37,194 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2022-12-13 21:32:37,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:37,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:37,195 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:37,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:32:37,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:32:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -321995800, now seen corresponding path program 1 times [2022-12-13 21:32:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27843124] [2022-12-13 21:32:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:37,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:32:37,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:37,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27843124] [2022-12-13 21:32:37,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27843124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:37,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:37,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:32:37,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649744972] [2022-12-13 21:32:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:37,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:32:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:32:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:32:37,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 319 [2022-12-13 21:32:37,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:37,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:37,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 319 [2022-12-13 21:32:37,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:38,215 INFO L130 PetriNetUnfolder]: 8145/11651 cut-off events. [2022-12-13 21:32:38,215 INFO L131 PetriNetUnfolder]: For 4058/4058 co-relation queries the response was YES. [2022-12-13 21:32:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26289 conditions, 11651 events. 8145/11651 cut-off events. For 4058/4058 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 68749 event pairs, 3484 based on Foata normal form. 0/9349 useless extension candidates. Maximal degree in co-relation 10536. Up to 6733 conditions per place. [2022-12-13 21:32:38,261 INFO L137 encePairwiseOnDemand]: 312/319 looper letters, 53 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2022-12-13 21:32:38,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 336 flow [2022-12-13 21:32:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:32:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:32:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2022-12-13 21:32:38,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4618599791013584 [2022-12-13 21:32:38,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2022-12-13 21:32:38,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2022-12-13 21:32:38,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:38,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2022-12-13 21:32:38,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:38,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:38,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:38,266 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 442 transitions. [2022-12-13 21:32:38,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 336 flow [2022-12-13 21:32:38,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:32:38,271 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2022-12-13 21:32:38,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-12-13 21:32:38,271 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2022-12-13 21:32:38,272 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2022-12-13 21:32:38,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:38,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:38,272 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 21:32:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:32:38,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:32:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1010485578, now seen corresponding path program 1 times [2022-12-13 21:32:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454161214] [2022-12-13 21:32:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:38,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:32:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:38,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:32:38,291 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:32:38,291 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 21:32:38,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 21:32:38,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 21:32:38,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 21:32:38,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 21:32:38,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:32:38,292 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 21:32:38,292 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:32:38,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 21:32:38,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 21:32:38,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-12-13 21:32:38,354 INFO L130 PetriNetUnfolder]: 25/255 cut-off events. [2022-12-13 21:32:38,354 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 21:32:38,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 711 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2022-12-13 21:32:38,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 205 transitions, 442 flow [2022-12-13 21:32:38,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 205 transitions, 442 flow [2022-12-13 21:32:38,359 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:32:38,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 205 transitions, 442 flow [2022-12-13 21:32:38,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 205 transitions, 442 flow [2022-12-13 21:32:38,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-12-13 21:32:38,381 INFO L130 PetriNetUnfolder]: 25/255 cut-off events. [2022-12-13 21:32:38,381 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 21:32:38,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 711 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2022-12-13 21:32:38,390 INFO L119 LiptonReduction]: Number of co-enabled transitions 25256 [2022-12-13 21:32:40,756 INFO L134 LiptonReduction]: Checked pairs total: 41036 [2022-12-13 21:32:40,756 INFO L136 LiptonReduction]: Total number of compositions: 195 [2022-12-13 21:32:40,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:32:40,757 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f34d262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:32:40,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 21:32:40,760 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-12-13 21:32:40,760 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 21:32:40,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:40,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:40,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:32:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 115715007, now seen corresponding path program 1 times [2022-12-13 21:32:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:40,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849334043] [2022-12-13 21:32:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:32:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849334043] [2022-12-13 21:32:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849334043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:40,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:40,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:32:40,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92616074] [2022-12-13 21:32:40,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:40,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:32:40,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:32:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:32:40,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 400 [2022-12-13 21:32:40,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:40,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:40,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 400 [2022-12-13 21:32:40,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:45,411 INFO L130 PetriNetUnfolder]: 57183/75565 cut-off events. [2022-12-13 21:32:45,411 INFO L131 PetriNetUnfolder]: For 10914/10914 co-relation queries the response was YES. [2022-12-13 21:32:45,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153557 conditions, 75565 events. 57183/75565 cut-off events. For 10914/10914 co-relation queries the response was YES. Maximal size of possible extension queue 2877. Compared 474109 event pairs, 25420 based on Foata normal form. 0/58188 useless extension candidates. Maximal degree in co-relation 14665. Up to 45825 conditions per place. [2022-12-13 21:32:45,719 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 66 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2022-12-13 21:32:45,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 363 flow [2022-12-13 21:32:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:32:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:32:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-12-13 21:32:45,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2022-12-13 21:32:45,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-12-13 21:32:45,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-12-13 21:32:45,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:45,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-12-13 21:32:45,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:45,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:45,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:45,724 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 132 flow. Second operand 3 states and 565 transitions. [2022-12-13 21:32:45,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 363 flow [2022-12-13 21:32:45,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 345 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 21:32:45,735 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 168 flow [2022-12-13 21:32:45,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2022-12-13 21:32:45,736 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-12-13 21:32:45,736 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 168 flow [2022-12-13 21:32:45,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:45,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:45,736 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:32:45,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:32:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1313966904, now seen corresponding path program 1 times [2022-12-13 21:32:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103505044] [2022-12-13 21:32:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:32:45,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:45,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103505044] [2022-12-13 21:32:45,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103505044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:45,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:45,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:32:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587190362] [2022-12-13 21:32:45,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:45,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:32:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:32:45,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:32:45,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 400 [2022-12-13 21:32:45,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:45,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:45,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 400 [2022-12-13 21:32:45,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:53,963 INFO L130 PetriNetUnfolder]: 93946/123470 cut-off events. [2022-12-13 21:32:53,963 INFO L131 PetriNetUnfolder]: For 40566/40594 co-relation queries the response was YES. [2022-12-13 21:32:54,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275680 conditions, 123470 events. 93946/123470 cut-off events. For 40566/40594 co-relation queries the response was YES. Maximal size of possible extension queue 4750. Compared 796819 event pairs, 41103 based on Foata normal form. 28/97724 useless extension candidates. Maximal degree in co-relation 104306. Up to 74094 conditions per place. [2022-12-13 21:32:54,734 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 71 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2022-12-13 21:32:54,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 442 flow [2022-12-13 21:32:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:32:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:32:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-12-13 21:32:54,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4683333333333333 [2022-12-13 21:32:54,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-12-13 21:32:54,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-12-13 21:32:54,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:54,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-12-13 21:32:54,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:54,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:54,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:54,739 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 168 flow. Second operand 3 states and 562 transitions. [2022-12-13 21:32:54,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 442 flow [2022-12-13 21:32:54,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 90 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:32:54,856 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 234 flow [2022-12-13 21:32:54,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2022-12-13 21:32:54,857 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2022-12-13 21:32:54,857 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 234 flow [2022-12-13 21:32:54,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:54,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:54,857 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:54,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 21:32:54,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:32:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1512188163, now seen corresponding path program 1 times [2022-12-13 21:32:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:32:54,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570195939] [2022-12-13 21:32:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:32:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:32:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 21:32:54,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:32:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570195939] [2022-12-13 21:32:54,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570195939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:32:54,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:32:54,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:32:54,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608526347] [2022-12-13 21:32:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:32:54,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:32:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:32:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:32:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:32:54,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 400 [2022-12-13 21:32:54,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:54,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:32:54,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 400 [2022-12-13 21:32:54,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:33:06,304 INFO L130 PetriNetUnfolder]: 137979/180756 cut-off events. [2022-12-13 21:33:06,304 INFO L131 PetriNetUnfolder]: For 100479/100893 co-relation queries the response was YES. [2022-12-13 21:33:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431963 conditions, 180756 events. 137979/180756 cut-off events. For 100479/100893 co-relation queries the response was YES. Maximal size of possible extension queue 6892. Compared 1189948 event pairs, 65561 based on Foata normal form. 0/143350 useless extension candidates. Maximal degree in co-relation 166614. Up to 116010 conditions per place. [2022-12-13 21:33:07,206 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 76 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2022-12-13 21:33:07,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 565 flow [2022-12-13 21:33:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:33:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:33:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-12-13 21:33:07,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-13 21:33:07,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-12-13 21:33:07,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-12-13 21:33:07,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:33:07,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-12-13 21:33:07,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:07,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:07,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:07,212 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 234 flow. Second operand 3 states and 560 transitions. [2022-12-13 21:33:07,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 565 flow [2022-12-13 21:33:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 531 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:33:07,498 INFO L231 Difference]: Finished difference. Result has 58 places, 71 transitions, 348 flow [2022-12-13 21:33:07,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=58, PETRI_TRANSITIONS=71} [2022-12-13 21:33:07,498 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2022-12-13 21:33:07,498 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 71 transitions, 348 flow [2022-12-13 21:33:07,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:07,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:33:07,499 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:33:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 21:33:07,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:33:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:33:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2084109691, now seen corresponding path program 1 times [2022-12-13 21:33:07,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:33:07,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704861691] [2022-12-13 21:33:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:33:07,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:33:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:33:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:33:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:33:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704861691] [2022-12-13 21:33:07,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704861691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:33:07,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:33:07,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:33:07,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994941023] [2022-12-13 21:33:07,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:33:07,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:33:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:33:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:33:07,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:33:07,610 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2022-12-13 21:33:07,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:07,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:33:07,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2022-12-13 21:33:07,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:33:30,574 INFO L130 PetriNetUnfolder]: 279672/363078 cut-off events. [2022-12-13 21:33:30,574 INFO L131 PetriNetUnfolder]: For 269694/270994 co-relation queries the response was YES. [2022-12-13 21:33:31,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930890 conditions, 363078 events. 279672/363078 cut-off events. For 269694/270994 co-relation queries the response was YES. Maximal size of possible extension queue 11399. Compared 2484658 event pairs, 75225 based on Foata normal form. 688/308514 useless extension candidates. Maximal degree in co-relation 799435. Up to 127768 conditions per place. [2022-12-13 21:33:32,731 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 197 selfloop transitions, 61 changer transitions 0/265 dead transitions. [2022-12-13 21:33:32,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 265 transitions, 1704 flow [2022-12-13 21:33:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:33:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:33:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1294 transitions. [2022-12-13 21:33:32,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46214285714285713 [2022-12-13 21:33:32,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1294 transitions. [2022-12-13 21:33:32,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1294 transitions. [2022-12-13 21:33:32,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:33:32,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1294 transitions. [2022-12-13 21:33:32,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:32,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:32,740 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:32,740 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 348 flow. Second operand 7 states and 1294 transitions. [2022-12-13 21:33:32,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 265 transitions, 1704 flow [2022-12-13 21:33:34,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 265 transitions, 1606 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:33:34,593 INFO L231 Difference]: Finished difference. Result has 68 places, 120 transitions, 936 flow [2022-12-13 21:33:34,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=68, PETRI_TRANSITIONS=120} [2022-12-13 21:33:34,594 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2022-12-13 21:33:34,594 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 120 transitions, 936 flow [2022-12-13 21:33:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:34,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:33:34,594 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:33:34,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:33:34,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:33:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:33:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -798281015, now seen corresponding path program 2 times [2022-12-13 21:33:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:33:34,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463774969] [2022-12-13 21:33:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:33:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:33:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:33:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:33:34,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:33:34,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463774969] [2022-12-13 21:33:34,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463774969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:33:34,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:33:34,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:33:34,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523746288] [2022-12-13 21:33:34,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:33:34,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:33:34,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:33:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:33:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:33:34,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2022-12-13 21:33:34,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 120 transitions, 936 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:33:34,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:33:34,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2022-12-13 21:33:34,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:34:22,807 INFO L130 PetriNetUnfolder]: 481144/629068 cut-off events. [2022-12-13 21:34:22,807 INFO L131 PetriNetUnfolder]: For 988961/990440 co-relation queries the response was YES. [2022-12-13 21:34:24,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1804898 conditions, 629068 events. 481144/629068 cut-off events. For 988961/990440 co-relation queries the response was YES. Maximal size of possible extension queue 21930. Compared 4640938 event pairs, 192095 based on Foata normal form. 3206/536483 useless extension candidates. Maximal degree in co-relation 1645804. Up to 342652 conditions per place. [2022-12-13 21:34:27,341 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 269 selfloop transitions, 132 changer transitions 0/408 dead transitions. [2022-12-13 21:34:27,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 408 transitions, 3563 flow [2022-12-13 21:34:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:34:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:34:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1471 transitions. [2022-12-13 21:34:27,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4596875 [2022-12-13 21:34:27,345 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1471 transitions. [2022-12-13 21:34:27,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1471 transitions. [2022-12-13 21:34:27,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:34:27,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1471 transitions. [2022-12-13 21:34:27,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:34:27,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:34:27,351 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:34:27,351 INFO L175 Difference]: Start difference. First operand has 68 places, 120 transitions, 936 flow. Second operand 8 states and 1471 transitions. [2022-12-13 21:34:27,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 408 transitions, 3563 flow [2022-12-13 21:35:14,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 408 transitions, 3563 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:35:14,353 INFO L231 Difference]: Finished difference. Result has 81 places, 247 transitions, 2855 flow [2022-12-13 21:35:14,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2855, PETRI_PLACES=81, PETRI_TRANSITIONS=247} [2022-12-13 21:35:14,354 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2022-12-13 21:35:14,354 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 247 transitions, 2855 flow [2022-12-13 21:35:14,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:35:14,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:35:14,354 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:35:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 21:35:14,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:35:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:35:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1846037468, now seen corresponding path program 1 times [2022-12-13 21:35:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:35:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909819408] [2022-12-13 21:35:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:35:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:35:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:35:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:35:14,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:35:14,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909819408] [2022-12-13 21:35:14,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909819408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:35:14,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:35:14,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:35:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475219251] [2022-12-13 21:35:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:35:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:35:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:35:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:35:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:35:14,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2022-12-13 21:35:14,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 247 transitions, 2855 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:35:14,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:35:14,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2022-12-13 21:35:14,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:36:34,807 INFO L130 PetriNetUnfolder]: 651767/853306 cut-off events. [2022-12-13 21:36:34,807 INFO L131 PetriNetUnfolder]: For 2349572/2351599 co-relation queries the response was YES. [2022-12-13 21:36:37,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2728636 conditions, 853306 events. 651767/853306 cut-off events. For 2349572/2351599 co-relation queries the response was YES. Maximal size of possible extension queue 30828. Compared 6548633 event pairs, 336716 based on Foata normal form. 3032/726905 useless extension candidates. Maximal degree in co-relation 2556279. Up to 614255 conditions per place. [2022-12-13 21:36:41,862 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 404 selfloop transitions, 109 changer transitions 0/520 dead transitions. [2022-12-13 21:36:41,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 520 transitions, 5853 flow [2022-12-13 21:36:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:36:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:36:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1472 transitions. [2022-12-13 21:36:41,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46 [2022-12-13 21:36:41,866 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1472 transitions. [2022-12-13 21:36:41,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1472 transitions. [2022-12-13 21:36:41,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:36:41,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1472 transitions. [2022-12-13 21:36:41,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:36:41,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:36:41,872 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:36:41,872 INFO L175 Difference]: Start difference. First operand has 81 places, 247 transitions, 2855 flow. Second operand 8 states and 1472 transitions. [2022-12-13 21:36:41,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 520 transitions, 5853 flow [2022-12-13 21:40:28,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 520 transitions, 5691 flow, removed 81 selfloop flow, removed 0 redundant places. [2022-12-13 21:40:28,621 INFO L231 Difference]: Finished difference. Result has 94 places, 360 transitions, 4633 flow [2022-12-13 21:40:28,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4633, PETRI_PLACES=94, PETRI_TRANSITIONS=360} [2022-12-13 21:40:28,622 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 43 predicate places. [2022-12-13 21:40:28,622 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 360 transitions, 4633 flow [2022-12-13 21:40:28,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:28,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:28,622 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 21:40:28,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:40:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -797388174, now seen corresponding path program 2 times [2022-12-13 21:40:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175249459] [2022-12-13 21:40:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:28,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:40:28,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:28,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175249459] [2022-12-13 21:40:28,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175249459] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:28,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:28,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:40:28,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819443390] [2022-12-13 21:40:28,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:28,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:40:28,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:40:28,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:40:28,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:40:28,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2022-12-13 21:40:28,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 360 transitions, 4633 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:28,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:28,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2022-12-13 21:40:28,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand