./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a --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 adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 --- 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-b5237d8 [2022-11-21 17:21:19,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:21:19,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:21:19,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:21:19,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:21:19,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:21:19,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:21:19,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:21:19,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:21:19,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:21:19,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:21:19,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:21:19,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:21:19,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:21:19,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:21:19,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:21:19,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:21:19,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:21:19,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:21:19,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:21:19,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:21:19,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:21:19,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:21:19,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:21:19,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:21:19,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:21:19,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:21:19,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:21:19,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:21:19,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:21:19,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:21:19,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:21:19,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:21:19,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:21:19,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:21:19,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:21:19,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:21:19,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:21:19,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:21:19,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:21:19,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:21:19,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:21:19,789 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:21:19,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:21:19,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:21:19,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:21:19,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:21:19,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:21:19,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:21:19,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:21:19,792 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:21:19,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:21:19,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:21:19,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:21:19,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:21:19,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:21:19,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:21:19,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:21:19,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:21:19,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:21:19,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:21:19,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:21:19,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:21:19,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:21:19,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:21:19,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:21:19,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:19,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:21:19,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:21:19,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:21:19,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:21:19,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:21:19,797 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:21:19,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:21:19,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:21:19,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 [2022-11-21 17:21:20,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:21:20,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:21:20,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:21:20,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:21:20,085 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:21:20,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-11-21 17:21:23,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:21:23,585 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:21:23,587 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-11-21 17:21:23,605 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/data/c39e0174d/3540011a6679497c8d2c51b03ec36bf0/FLAG15b8b55ff [2022-11-21 17:21:23,627 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/data/c39e0174d/3540011a6679497c8d2c51b03ec36bf0 [2022-11-21 17:21:23,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:21:23,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:21:23,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:23,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:21:23,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:21:23,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:23" (1/1) ... [2022-11-21 17:21:23,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77bcb9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:23, skipping insertion in model container [2022-11-21 17:21:23,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:23" (1/1) ... [2022-11-21 17:21:23,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:21:23,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:21:24,076 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_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-11-21 17:21:24,090 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_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-11-21 17:21:24,093 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_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-11-21 17:21:24,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:24,115 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:21:24,174 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_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-11-21 17:21:24,176 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_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-11-21 17:21:24,178 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_b37c909f-5f1c-43f7-8c86-b82169a18ba1/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-11-21 17:21:24,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:24,214 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:21:24,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24 WrapperNode [2022-11-21 17:21:24,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:24,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:21:24,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:21:24,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:21:24,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,298 INFO L138 Inliner]: procedures = 176, calls = 34, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 141 [2022-11-21 17:21:24,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:21:24,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:21:24,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:21:24,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:21:24,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:21:24,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:21:24,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:21:24,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:21:24,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (1/1) ... [2022-11-21 17:21:24,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:21:24,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:21:24,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b37c909f-5f1c-43f7-8c86-b82169a18ba1/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:21:24,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:21:24,456 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-21 17:21:24,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-21 17:21:24,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:21:24,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:21:24,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:21:24,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:21:24,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:21:24,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:21:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:21:24,460 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 17:21:24,584 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:21:24,587 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:21:24,949 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:21:25,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:21:25,111 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 17:21:25,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:21:25 BoogieIcfgContainer [2022-11-21 17:21:25,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:21:25,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:21:25,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:21:25,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:21:25,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:21:23" (1/3) ... [2022-11-21 17:21:25,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e9f6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:21:25, skipping insertion in model container [2022-11-21 17:21:25,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:24" (2/3) ... [2022-11-21 17:21:25,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e9f6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:21:25, skipping insertion in model container [2022-11-21 17:21:25,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:21:25" (3/3) ... [2022-11-21 17:21:25,124 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2022-11-21 17:21:25,132 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 17:21:25,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:21:25,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-21 17:21:25,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:21:25,248 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:21:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 129 transitions, 263 flow [2022-11-21 17:21:25,343 INFO L130 PetriNetUnfolder]: 14/140 cut-off events. [2022-11-21 17:21:25,344 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 17:21:25,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 192 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2022-11-21 17:21:25,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 129 transitions, 263 flow [2022-11-21 17:21:25,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 129 transitions, 263 flow [2022-11-21 17:21:25,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:21:25,371 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;@4e59689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:21:25,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 17:21:25,386 INFO L130 PetriNetUnfolder]: 2/52 cut-off events. [2022-11-21 17:21:25,386 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 17:21:25,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:21:25,387 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:25,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 17:21:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1240459769, now seen corresponding path program 1 times [2022-11-21 17:21:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76001747] [2022-11-21 17:21:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:21:25,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:21:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:21:25,644 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:21:25,646 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:21:25,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 17:21:25,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-21 17:21:25,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-21 17:21:25,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-21 17:21:25,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-21 17:21:25,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-21 17:21:25,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-21 17:21:25,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:21:25,656 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 17:21:25,672 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:21:25,673 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 17:21:25,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:21:25,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 464 flow [2022-11-21 17:21:25,937 INFO L130 PetriNetUnfolder]: 27/250 cut-off events. [2022-11-21 17:21:25,938 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:21:25,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 250 events. 27/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 683 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 205. Up to 6 conditions per place. [2022-11-21 17:21:25,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 226 transitions, 464 flow [2022-11-21 17:21:25,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 226 transitions, 464 flow [2022-11-21 17:21:25,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:21:25,959 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;@4e59689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:21:25,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-21 17:21:25,991 INFO L130 PetriNetUnfolder]: 4/97 cut-off events. [2022-11-21 17:21:25,991 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:21:25,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:21:25,992 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:25,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-21 17:21:25,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -912953981, now seen corresponding path program 1 times [2022-11-21 17:21:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:25,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809667356] [2022-11-21 17:21:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:25,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:21:26,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:21:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:21:26,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:21:26,073 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:21:26,074 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-21 17:21:26,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2022-11-21 17:21:26,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2022-11-21 17:21:26,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2022-11-21 17:21:26,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2022-11-21 17:21:26,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2022-11-21 17:21:26,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2022-11-21 17:21:26,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2022-11-21 17:21:26,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2022-11-21 17:21:26,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2022-11-21 17:21:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:21:26,077 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 17:21:26,078 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:21:26,078 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 17:21:26,142 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:21:26,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 323 transitions, 667 flow [2022-11-21 17:21:26,226 INFO L130 PetriNetUnfolder]: 40/360 cut-off events. [2022-11-21 17:21:26,227 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 17:21:26,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 360 events. 40/360 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1267 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 301. Up to 8 conditions per place. [2022-11-21 17:21:26,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 323 transitions, 667 flow [2022-11-21 17:21:26,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 323 transitions, 667 flow [2022-11-21 17:21:26,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:21:26,248 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;@4e59689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:21:26,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-21 17:21:26,270 INFO L130 PetriNetUnfolder]: 8/137 cut-off events. [2022-11-21 17:21:26,270 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 17:21:26,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:21:26,270 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:26,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-11-21 17:21:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash -256942526, now seen corresponding path program 1 times [2022-11-21 17:21:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:26,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183683375] [2022-11-21 17:21:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183683375] [2022-11-21 17:21:26,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183683375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:26,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:26,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:21:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438708680] [2022-11-21 17:21:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:21:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:21:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:21:26,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 323 [2022-11-21 17:21:26,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 323 transitions, 667 flow. Second operand has 6 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:26,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:21:26,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 323 [2022-11-21 17:21:26,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:21:34,241 INFO L130 PetriNetUnfolder]: 10671/37188 cut-off events. [2022-11-21 17:21:34,241 INFO L131 PetriNetUnfolder]: For 1584/1584 co-relation queries the response was YES. [2022-11-21 17:21:34,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52732 conditions, 37188 events. 10671/37188 cut-off events. For 1584/1584 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 472513 event pairs, 2657 based on Foata normal form. 8467/42463 useless extension candidates. Maximal degree in co-relation 7100. Up to 5631 conditions per place. [2022-11-21 17:21:34,626 INFO L137 encePairwiseOnDemand]: 286/323 looper letters, 126 selfloop transitions, 16 changer transitions 0/382 dead transitions. [2022-11-21 17:21:34,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 382 transitions, 1129 flow [2022-11-21 17:21:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:21:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:21:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1998 transitions. [2022-11-21 17:21:34,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8836797877045555 [2022-11-21 17:21:34,651 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1998 transitions. [2022-11-21 17:21:34,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1998 transitions. [2022-11-21 17:21:34,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:21:34,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1998 transitions. [2022-11-21 17:21:34,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 285.42857142857144) internal successors, (1998), 7 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:34,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:34,682 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:34,684 INFO L175 Difference]: Start difference. First operand has 293 places, 323 transitions, 667 flow. Second operand 7 states and 1998 transitions. [2022-11-21 17:21:34,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 382 transitions, 1129 flow [2022-11-21 17:21:34,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 382 transitions, 1113 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-11-21 17:21:34,708 INFO L231 Difference]: Finished difference. Result has 284 places, 293 transitions, 682 flow [2022-11-21 17:21:34,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=284, PETRI_TRANSITIONS=293} [2022-11-21 17:21:34,714 INFO L288 CegarLoopForPetriNet]: 293 programPoint places, -9 predicate places. [2022-11-21 17:21:34,714 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 293 transitions, 682 flow [2022-11-21 17:21:34,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:34,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:21:34,717 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:34,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:21:34,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-11-21 17:21:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash 311081830, now seen corresponding path program 1 times [2022-11-21 17:21:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:34,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425127077] [2022-11-21 17:21:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:34,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:21:34,766 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:21:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:21:34,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:21:34,801 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:21:34,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-21 17:21:34,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2022-11-21 17:21:34,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2022-11-21 17:21:34,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2022-11-21 17:21:34,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2022-11-21 17:21:34,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2022-11-21 17:21:34,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2022-11-21 17:21:34,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2022-11-21 17:21:34,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2022-11-21 17:21:34,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2022-11-21 17:21:34,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2022-11-21 17:21:34,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2022-11-21 17:21:34,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2022-11-21 17:21:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:21:34,806 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-21 17:21:34,807 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:21:34,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 17:21:34,885 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:21:34,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 380 places, 420 transitions, 872 flow [2022-11-21 17:21:35,170 INFO L130 PetriNetUnfolder]: 53/470 cut-off events. [2022-11-21 17:21:35,170 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-21 17:21:35,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 470 events. 53/470 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1887 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 397. Up to 10 conditions per place. [2022-11-21 17:21:35,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 380 places, 420 transitions, 872 flow [2022-11-21 17:21:35,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 380 places, 420 transitions, 872 flow [2022-11-21 17:21:35,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:21:35,190 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;@4e59689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:21:35,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-21 17:21:35,205 INFO L130 PetriNetUnfolder]: 7/135 cut-off events. [2022-11-21 17:21:35,206 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 17:21:35,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:21:35,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:21:35,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-11-21 17:21:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:21:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1009575106, now seen corresponding path program 1 times [2022-11-21 17:21:35,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:21:35,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458565883] [2022-11-21 17:21:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:21:35,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:21:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:21:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:21:35,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:21:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458565883] [2022-11-21 17:21:35,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458565883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:21:35,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:21:35,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:21:35,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201832483] [2022-11-21 17:21:35,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:21:35,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:21:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:21:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:21:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:21:35,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 420 [2022-11-21 17:21:35,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 420 transitions, 872 flow. Second operand has 6 states, 6 states have (on average 327.6666666666667) internal successors, (1966), 6 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:21:35,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:21:35,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 420 [2022-11-21 17:21:35,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand