./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS --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-4e7fbc6 [2022-11-23 02:43:46,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:43:46,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:43:46,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:43:46,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:43:46,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:43:46,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:43:46,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:43:46,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:43:46,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:43:46,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:43:46,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:43:46,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:43:46,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:43:46,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:43:46,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:43:46,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:43:46,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:43:46,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:43:46,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:43:46,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:43:46,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:43:46,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:43:46,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:43:46,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:43:46,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:43:46,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:43:46,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:43:46,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:43:46,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:43:46,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:43:46,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:43:46,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:43:46,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:43:46,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:43:46,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:43:46,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:43:46,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:43:46,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:43:46,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:43:46,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:43:46,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:43:47,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:43:47,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:43:47,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:43:47,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:43:47,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:43:47,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:43:47,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:43:47,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:43:47,024 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:43:47,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:43:47,025 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:43:47,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:43:47,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:43:47,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:43:47,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:43:47,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:43:47,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:43:47,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:43:47,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:43:47,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:43:47,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:43:47,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:43:47,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:43:47,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:43:47,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:43:47,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:43:47,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:43:47,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:43:47,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:43:47,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:43:47,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:43:47,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:43:47,034 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:43:47,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:43:47,034 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_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 [2022-11-23 02:43:47,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:43:47,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:43:47,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:43:47,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:43:47,375 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:43:47,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-11-23 02:43:50,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:43:50,861 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:43:50,861 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-11-23 02:43:50,885 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/data/72b557005/01a71fa3fc7b4063a67dfced424ba302/FLAGbc0f5b207 [2022-11-23 02:43:50,900 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/data/72b557005/01a71fa3fc7b4063a67dfced424ba302 [2022-11-23 02:43:50,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:43:50,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:43:50,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:43:50,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:43:50,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:43:50,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:50" (1/1) ... [2022-11-23 02:43:50,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170b7399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:50, skipping insertion in model container [2022-11-23 02:43:50,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:50" (1/1) ... [2022-11-23 02:43:50,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:43:50,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:43:51,389 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_792e4109-e5df-4899-9bb1-dcc26011d2e4/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-11-23 02:43:51,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:43:51,411 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:43:51,445 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_792e4109-e5df-4899-9bb1-dcc26011d2e4/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-11-23 02:43:51,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:43:51,481 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:43:51,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51 WrapperNode [2022-11-23 02:43:51,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:43:51,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:43:51,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:43:51,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:43:51,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,526 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2022-11-23 02:43:51,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:43:51,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:43:51,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:43:51,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:43:51,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,551 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:43:51,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:43:51,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:43:51,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:43:51,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (1/1) ... [2022-11-23 02:43:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:43:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:43:51,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:43:51,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792e4109-e5df-4899-9bb1-dcc26011d2e4/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:43:51,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:43:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 02:43:51,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 02:43:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:43:51,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:43:51,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:43:51,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:43:51,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:43:51,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:43:51,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:43:51,646 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:43:51,835 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:43:51,837 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:43:52,040 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:43:52,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:43:52,075 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 02:43:52,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:52 BoogieIcfgContainer [2022-11-23 02:43:52,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:43:52,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:43:52,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:43:52,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:43:52,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:50" (1/3) ... [2022-11-23 02:43:52,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52aa71b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:52, skipping insertion in model container [2022-11-23 02:43:52,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:51" (2/3) ... [2022-11-23 02:43:52,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52aa71b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:52, skipping insertion in model container [2022-11-23 02:43:52,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:52" (3/3) ... [2022-11-23 02:43:52,087 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2022-11-23 02:43:52,096 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:43:52,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:43:52,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:43:52,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:43:52,184 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 02:43:52,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-23 02:43:52,264 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-23 02:43:52,265 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:43:52,270 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. [2022-11-23 02:43:52,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-11-23 02:43:52,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-11-23 02:43:52,278 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:43:52,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-23 02:43:52,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-23 02:43:52,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-23 02:43:52,344 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-23 02:43:52,344 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:43:52,345 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. [2022-11-23 02:43:52,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2022-11-23 02:43:55,876 INFO L134 LiptonReduction]: Checked pairs total: 1162 [2022-11-23 02:43:55,876 INFO L136 LiptonReduction]: Total number of compositions: 84 [2022-11-23 02:43:55,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:43:55,899 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;@7ae49094, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:43:55,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 02:43:55,904 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2022-11-23 02:43:55,904 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:43:55,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:43:55,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:43:55,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:43:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:55,911 INFO L85 PathProgramCache]: Analyzing trace with hash 371744704, now seen corresponding path program 1 times [2022-11-23 02:43:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:43:55,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855235537] [2022-11-23 02:43:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:43:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:43:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:43:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:43:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:43:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855235537] [2022-11-23 02:43:56,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855235537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:43:56,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:43:56,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:43:56,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514313527] [2022-11-23 02:43:56,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:43:56,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 02:43:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:43:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 02:43:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:43:56,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 163 [2022-11-23 02:43:56,232 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) [2022-11-23 02:43:56,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:43:56,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 163 [2022-11-23 02:43:56,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:43:56,278 INFO L130 PetriNetUnfolder]: 7/20 cut-off events. [2022-11-23 02:43:56,278 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:43:56,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 4 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2022-11-23 02:43:56,280 INFO L137 encePairwiseOnDemand]: 161/163 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2022-11-23 02:43:56,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2022-11-23 02:43:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 02:43:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 02:43:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 149 transitions. [2022-11-23 02:43:56,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4570552147239264 [2022-11-23 02:43:56,297 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 149 transitions. [2022-11-23 02:43:56,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 149 transitions. [2022-11-23 02:43:56,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:43:56,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 149 transitions. [2022-11-23 02:43:56,303 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) [2022-11-23 02:43:56,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:43:56,311 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:43:56,313 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 149 transitions. [2022-11-23 02:43:56,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2022-11-23 02:43:56,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 02:43:56,319 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 21 flow [2022-11-23 02:43:56,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, 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} [2022-11-23 02:43:56,325 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2022-11-23 02:43:56,326 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 21 flow [2022-11-23 02:43:56,326 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) [2022-11-23 02:43:56,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:43:56,326 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 02:43:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:43:56,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:43:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1360876731, now seen corresponding path program 1 times [2022-11-23 02:43:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:43:56,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245294352] [2022-11-23 02:43:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:43:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:43:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:43:56,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 02:43:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:43:56,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 02:43:56,436 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 02:43:56,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-23 02:43:56,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-23 02:43:56,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-23 02:43:56,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:43:56,441 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 02:43:56,444 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 02:43:56,444 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 02:43:56,469 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 02:43:56,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-11-23 02:43:56,548 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2022-11-23 02:43:56,548 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:43:56,553 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 246 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. [2022-11-23 02:43:56,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 121 transitions, 254 flow [2022-11-23 02:43:56,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 121 transitions, 254 flow [2022-11-23 02:43:56,557 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:43:56,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 121 transitions, 254 flow [2022-11-23 02:43:56,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 121 transitions, 254 flow [2022-11-23 02:43:56,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-11-23 02:43:56,613 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2022-11-23 02:43:56,614 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:43:56,617 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 246 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. [2022-11-23 02:43:56,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 5740 [2022-11-23 02:43:59,358 INFO L134 LiptonReduction]: Checked pairs total: 9551 [2022-11-23 02:43:59,358 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-11-23 02:43:59,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:43:59,362 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;@7ae49094, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:43:59,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 02:43:59,366 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-11-23 02:43:59,366 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:43:59,366 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:43:59,366 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:43:59,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 02:43:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash -788238896, now seen corresponding path program 1 times [2022-11-23 02:43:59,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:43:59,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621350322] [2022-11-23 02:43:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:43:59,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:43:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:43:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:43:59,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:43:59,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621350322] [2022-11-23 02:43:59,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621350322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:43:59,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:43:59,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:43:59,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26578438] [2022-11-23 02:43:59,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:43:59,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:43:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:43:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:43:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:43:59,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 236 [2022-11-23 02:43:59,484 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) [2022-11-23 02:43:59,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:43:59,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 236 [2022-11-23 02:43:59,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:43:59,657 INFO L130 PetriNetUnfolder]: 340/593 cut-off events. [2022-11-23 02:43:59,657 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-23 02:43:59,659 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 41. Compared 2726 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. [2022-11-23 02:43:59,662 INFO L137 encePairwiseOnDemand]: 229/236 looper letters, 31 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-11-23 02:43:59,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2022-11-23 02:43:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:43:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:43:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-11-23 02:43:59,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4576271186440678 [2022-11-23 02:43:59,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-11-23 02:43:59,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-11-23 02:43:59,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:43:59,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-11-23 02:43:59,681 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) [2022-11-23 02:43:59,685 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) [2022-11-23 02:43:59,686 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) [2022-11-23 02:43:59,687 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 324 transitions. [2022-11-23 02:43:59,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2022-11-23 02:43:59,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-23 02:43:59,690 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2022-11-23 02:43:59,690 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} [2022-11-23 02:43:59,691 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-11-23 02:43:59,691 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2022-11-23 02:43:59,692 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) [2022-11-23 02:43:59,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:43:59,692 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 02:43:59,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 02:43:59,693 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)] === [2022-11-23 02:43:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash -330740689, now seen corresponding path program 1 times [2022-11-23 02:43:59,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:43:59,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985408014] [2022-11-23 02:43:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:43:59,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:43:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:43:59,721 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 02:43:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:43:59,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 02:43:59,737 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 02:43:59,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 02:43:59,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 02:43:59,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 02:43:59,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 02:43:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 02:43:59,739 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 02:43:59,739 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 02:43:59,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 02:43:59,767 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 02:43:59,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-11-23 02:43:59,805 INFO L130 PetriNetUnfolder]: 19/200 cut-off events. [2022-11-23 02:43:59,805 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 02:43:59,807 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. [2022-11-23 02:43:59,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 163 transitions, 347 flow [2022-11-23 02:43:59,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 163 transitions, 347 flow [2022-11-23 02:43:59,809 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:43:59,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 163 transitions, 347 flow [2022-11-23 02:43:59,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 163 transitions, 347 flow [2022-11-23 02:43:59,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-11-23 02:43:59,836 INFO L130 PetriNetUnfolder]: 19/200 cut-off events. [2022-11-23 02:43:59,837 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 02:43:59,838 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. [2022-11-23 02:43:59,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 13776 [2022-11-23 02:44:03,173 INFO L134 LiptonReduction]: Checked pairs total: 22924 [2022-11-23 02:44:03,173 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-23 02:44:03,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:44:03,177 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;@7ae49094, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:44:03,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 02:44:03,181 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-11-23 02:44:03,181 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:44:03,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:44:03,182 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:44:03,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 02:44:03,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:44:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2059146596, now seen corresponding path program 1 times [2022-11-23 02:44:03,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:44:03,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571827311] [2022-11-23 02:44:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:44:03,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:44:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:44:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:44:03,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:44:03,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571827311] [2022-11-23 02:44:03,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571827311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:44:03,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:44:03,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:44:03,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128628715] [2022-11-23 02:44:03,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:44:03,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:44:03,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:44:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:44:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:44:03,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 314 [2022-11-23 02:44:03,263 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) [2022-11-23 02:44:03,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:44:03,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 314 [2022-11-23 02:44:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:44:03,989 INFO L130 PetriNetUnfolder]: 4700/6828 cut-off events. [2022-11-23 02:44:03,989 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2022-11-23 02:44:04,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13733 conditions, 6828 events. 4700/6828 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39097 event pairs, 2158 based on Foata normal form. 0/5220 useless extension candidates. Maximal degree in co-relation 1512. Up to 4275 conditions per place. [2022-11-23 02:44:04,101 INFO L137 encePairwiseOnDemand]: 306/314 looper letters, 48 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-23 02:44:04,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 263 flow [2022-11-23 02:44:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:44:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:44:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2022-11-23 02:44:04,103 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4713375796178344 [2022-11-23 02:44:04,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2022-11-23 02:44:04,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2022-11-23 02:44:04,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:44:04,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2022-11-23 02:44:04,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:04,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:04,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:04,110 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 444 transitions. [2022-11-23 02:44:04,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 263 flow [2022-11-23 02:44:04,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 255 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-23 02:44:04,116 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2022-11-23 02:44:04,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, 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} [2022-11-23 02:44:04,119 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2022-11-23 02:44:04,119 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2022-11-23 02:44:04,120 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) [2022-11-23 02:44:04,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:44:04,120 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:44:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 02:44:04,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 02:44:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:44:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -751467342, now seen corresponding path program 1 times [2022-11-23 02:44:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:44:04,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664133245] [2022-11-23 02:44:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:44:04,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:44:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:44:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:44:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:44:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664133245] [2022-11-23 02:44:04,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664133245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:44:04,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:44:04,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:44:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909247284] [2022-11-23 02:44:04,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:44:04,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:44:04,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:44:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:44:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:44:04,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 314 [2022-11-23 02:44:04,262 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) [2022-11-23 02:44:04,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:44:04,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 314 [2022-11-23 02:44:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:44:05,470 INFO L130 PetriNetUnfolder]: 7552/10789 cut-off events. [2022-11-23 02:44:05,471 INFO L131 PetriNetUnfolder]: For 3886/3886 co-relation queries the response was YES. [2022-11-23 02:44:05,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24483 conditions, 10789 events. 7552/10789 cut-off events. For 3886/3886 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 62770 event pairs, 3205 based on Foata normal form. 0/9097 useless extension candidates. Maximal degree in co-relation 9097. Up to 6242 conditions per place. [2022-11-23 02:44:05,550 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 53 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2022-11-23 02:44:05,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 336 flow [2022-11-23 02:44:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:44:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:44:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2022-11-23 02:44:05,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4692144373673036 [2022-11-23 02:44:05,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2022-11-23 02:44:05,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2022-11-23 02:44:05,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:44:05,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2022-11-23 02:44:05,555 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) [2022-11-23 02:44:05,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:05,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:05,559 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 442 transitions. [2022-11-23 02:44:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 336 flow [2022-11-23 02:44:05,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:44:05,568 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2022-11-23 02:44:05,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, 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} [2022-11-23 02:44:05,569 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2022-11-23 02:44:05,569 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2022-11-23 02:44:05,570 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) [2022-11-23 02:44:05,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:44:05,570 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 02:44:05,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 02:44:05,570 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)] === [2022-11-23 02:44:05,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:44:05,571 INFO L85 PathProgramCache]: Analyzing trace with hash 475781400, now seen corresponding path program 1 times [2022-11-23 02:44:05,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:44:05,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782415769] [2022-11-23 02:44:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:44:05,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:44:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:44:05,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 02:44:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:44:05,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 02:44:05,599 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 02:44:05,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 02:44:05,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 02:44:05,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-23 02:44:05,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 02:44:05,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 02:44:05,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 02:44:05,601 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-23 02:44:05,602 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 02:44:05,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 02:44:05,632 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 02:44:05,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-11-23 02:44:05,668 INFO L130 PetriNetUnfolder]: 25/255 cut-off events. [2022-11-23 02:44:05,668 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 02:44:05,670 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 712 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. [2022-11-23 02:44:05,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 205 transitions, 442 flow [2022-11-23 02:44:05,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 205 transitions, 442 flow [2022-11-23 02:44:05,673 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:44:05,674 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 205 transitions, 442 flow [2022-11-23 02:44:05,674 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 205 transitions, 442 flow [2022-11-23 02:44:05,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-11-23 02:44:05,707 INFO L130 PetriNetUnfolder]: 25/255 cut-off events. [2022-11-23 02:44:05,707 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 02:44:05,710 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 712 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. [2022-11-23 02:44:05,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 25256 [2022-11-23 02:44:09,838 INFO L134 LiptonReduction]: Checked pairs total: 40971 [2022-11-23 02:44:09,839 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-23 02:44:09,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:44:09,842 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;@7ae49094, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:44:09,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 02:44:09,845 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-11-23 02:44:09,845 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:44:09,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:44:09,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:44:09,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 02:44:09,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:44:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash -326301465, now seen corresponding path program 1 times [2022-11-23 02:44:09,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:44:09,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141385146] [2022-11-23 02:44:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:44:09,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:44:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:44:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:44:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:44:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141385146] [2022-11-23 02:44:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141385146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:44:09,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:44:09,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:44:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930928757] [2022-11-23 02:44:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:44:09,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:44:09,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:44:09,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:44:09,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:44:09,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 401 [2022-11-23 02:44:09,952 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) [2022-11-23 02:44:09,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:44:09,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 401 [2022-11-23 02:44:09,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:44:17,003 INFO L130 PetriNetUnfolder]: 57183/75565 cut-off events. [2022-11-23 02:44:17,003 INFO L131 PetriNetUnfolder]: For 10914/10914 co-relation queries the response was YES. [2022-11-23 02:44:17,108 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 2878. Compared 473614 event pairs, 25420 based on Foata normal form. 0/58186 useless extension candidates. Maximal degree in co-relation 14665. Up to 45825 conditions per place. [2022-11-23 02:44:17,592 INFO L137 encePairwiseOnDemand]: 392/401 looper letters, 66 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2022-11-23 02:44:17,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 363 flow [2022-11-23 02:44:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:44:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:44:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-23 02:44:17,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4696591853699086 [2022-11-23 02:44:17,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-23 02:44:17,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-23 02:44:17,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:44:17,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-23 02:44:17,600 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) [2022-11-23 02:44:17,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:17,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:17,604 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 132 flow. Second operand 3 states and 565 transitions. [2022-11-23 02:44:17,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 363 flow [2022-11-23 02:44:17,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 345 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-23 02:44:17,623 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 168 flow [2022-11-23 02:44:17,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, 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} [2022-11-23 02:44:17,625 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-11-23 02:44:17,625 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 168 flow [2022-11-23 02:44:17,626 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) [2022-11-23 02:44:17,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:44:17,626 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:44:17,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 02:44:17,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 02:44:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:44:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1483208130, now seen corresponding path program 1 times [2022-11-23 02:44:17,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:44:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548018746] [2022-11-23 02:44:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:44:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:44:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:44:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:44:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:44:17,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548018746] [2022-11-23 02:44:17,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548018746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:44:17,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:44:17,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:44:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119642285] [2022-11-23 02:44:17,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:44:17,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:44:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:44:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:44:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:44:17,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 401 [2022-11-23 02:44:17,743 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) [2022-11-23 02:44:17,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:44:17,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 401 [2022-11-23 02:44:17,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:44:28,254 INFO L130 PetriNetUnfolder]: 93460/122960 cut-off events. [2022-11-23 02:44:28,254 INFO L131 PetriNetUnfolder]: For 40126/40154 co-relation queries the response was YES. [2022-11-23 02:44:28,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274472 conditions, 122960 events. 93460/122960 cut-off events. For 40126/40154 co-relation queries the response was YES. Maximal size of possible extension queue 4727. Compared 796377 event pairs, 41161 based on Foata normal form. 28/97268 useless extension candidates. Maximal degree in co-relation 107971. Up to 73704 conditions per place. [2022-11-23 02:44:29,201 INFO L137 encePairwiseOnDemand]: 393/401 looper letters, 71 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2022-11-23 02:44:29,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 442 flow [2022-11-23 02:44:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:44:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:44:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-11-23 02:44:29,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46716541978387366 [2022-11-23 02:44:29,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-11-23 02:44:29,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-11-23 02:44:29,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:44:29,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-11-23 02:44:29,209 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) [2022-11-23 02:44:29,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:29,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:44:29,213 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 168 flow. Second operand 3 states and 562 transitions. [2022-11-23 02:44:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 442 flow [2022-11-23 02:44:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 90 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:44:29,419 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 234 flow [2022-11-23 02:44:29,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, 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} [2022-11-23 02:44:29,421 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2022-11-23 02:44:29,421 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 234 flow [2022-11-23 02:44:29,422 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) [2022-11-23 02:44:29,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:44:29,422 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:44:29,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 02:44:29,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 02:44:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:44:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash -193265562, now seen corresponding path program 1 times [2022-11-23 02:44:29,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:44:29,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676670300] [2022-11-23 02:44:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:44:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:44:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:44:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 02:44:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:44:29,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676670300] [2022-11-23 02:44:29,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676670300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:44:29,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:44:29,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:44:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776018865] [2022-11-23 02:44:29,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:44:29,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:44:29,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:44:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:44:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:44:29,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 401 [2022-11-23 02:44:29,536 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) [2022-11-23 02:44:29,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:44:29,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 401 [2022-11-23 02:44:29,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand