./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/qw2004-2b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/qw2004-2b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R --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 f17f6182d2330561fe6717b6a061d0dded698483f9e32b37a3b36e1144855a29 --- 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-38b53e6 [2022-11-25 17:56:26,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:56:26,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:56:26,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:56:26,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:56:26,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:56:26,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:56:26,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:56:26,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:56:26,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:56:26,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:56:26,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:56:26,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:56:26,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:56:26,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:56:26,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:56:26,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:56:26,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:56:26,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:56:26,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:56:26,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:56:26,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:56:26,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:56:26,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:56:26,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:56:26,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:56:26,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:56:26,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:56:26,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:56:26,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:56:26,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:56:26,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:56:26,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:56:26,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:56:26,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:56:26,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:56:26,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:56:26,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:56:26,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:56:26,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:56:26,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:56:26,708 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:56:26,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:56:26,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:56:26,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:56:26,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:56:26,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:56:26,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:56:26,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:56:26,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:56:26,752 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:56:26,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:56:26,754 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:56:26,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:56:26,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:56:26,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:56:26,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:56:26,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:56:26,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:56:26,755 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:56:26,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:56:26,756 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:56:26,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:56:26,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:56:26,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:56:26,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:56:26,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:56:26,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:56:26,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:56:26,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:56:26,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:56:26,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:56:26,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:56:26,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:56:26,760 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:56:26,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:56:26,761 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_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f17f6182d2330561fe6717b6a061d0dded698483f9e32b37a3b36e1144855a29 [2022-11-25 17:56:27,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:56:27,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:56:27,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:56:27,160 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:56:27,161 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:56:27,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-lit/qw2004-2b.i [2022-11-25 17:56:30,334 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:56:30,601 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:56:30,601 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/sv-benchmarks/c/pthread-lit/qw2004-2b.i [2022-11-25 17:56:30,619 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/data/e8ecedebf/8867f3d505da4d308cd76187259a9592/FLAGb1951f950 [2022-11-25 17:56:30,641 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/data/e8ecedebf/8867f3d505da4d308cd76187259a9592 [2022-11-25 17:56:30,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:56:30,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:56:30,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:56:30,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:56:30,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:56:30,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:56:30" (1/1) ... [2022-11-25 17:56:30,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cda2426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:30, skipping insertion in model container [2022-11-25 17:56:30,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:56:30" (1/1) ... [2022-11-25 17:56:30,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:56:30,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:56:31,210 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_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/sv-benchmarks/c/pthread-lit/qw2004-2b.i[30003,30016] [2022-11-25 17:56:31,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,227 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,232 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,238 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,241 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,243 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,244 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,244 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,245 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:56:31,267 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:56:31,325 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_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/sv-benchmarks/c/pthread-lit/qw2004-2b.i[30003,30016] [2022-11-25 17:56:31,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:56:31,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:56:31,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:56:31,410 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:56:31,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31 WrapperNode [2022-11-25 17:56:31,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:56:31,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:56:31,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:56:31,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:56:31,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,501 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 9, calls inlined = 10, statements flattened = 117 [2022-11-25 17:56:31,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:56:31,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:56:31,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:56:31,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:56:31,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:56:31,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:56:31,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:56:31,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:56:31,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (1/1) ... [2022-11-25 17:56:31,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:56:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:31,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:56:31,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:56:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2022-11-25 17:56:31,646 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2022-11-25 17:56:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:56:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:56:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:56:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:56:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:56:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:56:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:56:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:56:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:56:31,650 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:56:31,780 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:56:31,782 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:56:32,021 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:56:32,053 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:56:32,056 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 17:56:32,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:32 BoogieIcfgContainer [2022-11-25 17:56:32,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:56:32,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:56:32,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:56:32,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:56:32,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:56:30" (1/3) ... [2022-11-25 17:56:32,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4251da99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:56:32, skipping insertion in model container [2022-11-25 17:56:32,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:31" (2/3) ... [2022-11-25 17:56:32,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4251da99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:56:32, skipping insertion in model container [2022-11-25 17:56:32,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:32" (3/3) ... [2022-11-25 17:56:32,073 INFO L112 eAbstractionObserver]: Analyzing ICFG qw2004-2b.i [2022-11-25 17:56:32,082 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:56:32,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:56:32,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:56:32,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:56:32,190 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:56:32,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 245 flow [2022-11-25 17:56:32,341 INFO L130 PetriNetUnfolder]: 6/119 cut-off events. [2022-11-25 17:56:32,342 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:56:32,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 119 events. 6/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2022-11-25 17:56:32,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 245 flow [2022-11-25 17:56:32,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 119 transitions, 241 flow [2022-11-25 17:56:32,358 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:56:32,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 119 transitions, 241 flow [2022-11-25 17:56:32,386 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 119 transitions, 241 flow [2022-11-25 17:56:32,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 241 flow [2022-11-25 17:56:32,443 INFO L130 PetriNetUnfolder]: 6/119 cut-off events. [2022-11-25 17:56:32,443 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:56:32,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 119 events. 6/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2022-11-25 17:56:32,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 3906 [2022-11-25 17:56:36,425 INFO L134 LiptonReduction]: Checked pairs total: 4013 [2022-11-25 17:56:36,426 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-25 17:56:36,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:56:36,452 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;@13560881, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:56:36,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:56:36,458 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2022-11-25 17:56:36,458 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:56:36,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:36,459 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:56:36,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:56:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash 14286832, now seen corresponding path program 1 times [2022-11-25 17:56:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899984823] [2022-11-25 17:56:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:36,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:36,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:36,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899984823] [2022-11-25 17:56:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899984823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:56:36,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:56:36,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:56:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218718606] [2022-11-25 17:56:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:56:36,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:56:36,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:56:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:56:36,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 249 [2022-11-25 17:56:36,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 37 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:36,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:36,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 249 [2022-11-25 17:56:36,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:36,958 INFO L130 PetriNetUnfolder]: 78/157 cut-off events. [2022-11-25 17:56:36,958 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:56:36,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 157 events. 78/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 575 event pairs, 20 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 304. Up to 78 conditions per place. [2022-11-25 17:56:36,961 INFO L137 encePairwiseOnDemand]: 245/249 looper letters, 17 selfloop transitions, 3 changer transitions 8/29 dead transitions. [2022-11-25 17:56:36,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 29 transitions, 117 flow [2022-11-25 17:56:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:56:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:56:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2022-11-25 17:56:36,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48460508701472554 [2022-11-25 17:56:36,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2022-11-25 17:56:36,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2022-11-25 17:56:36,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:36,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2022-11-25 17:56:36,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:36,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:36,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,000 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 37 flow. Second operand 3 states and 362 transitions. [2022-11-25 17:56:37,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 29 transitions, 117 flow [2022-11-25 17:56:37,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:56:37,006 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 46 flow [2022-11-25 17:56:37,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2022-11-25 17:56:37,011 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2022-11-25 17:56:37,012 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 46 flow [2022-11-25 17:56:37,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:37,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:56:37,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:56:37,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:56:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 442857275, now seen corresponding path program 1 times [2022-11-25 17:56:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:37,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272369410] [2022-11-25 17:56:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:37,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272369410] [2022-11-25 17:56:37,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272369410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:56:37,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:56:37,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:56:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875963440] [2022-11-25 17:56:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:56:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:56:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:56:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:56:37,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 249 [2022-11-25 17:56:37,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 14 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:37,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 249 [2022-11-25 17:56:37,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:37,166 INFO L130 PetriNetUnfolder]: 34/81 cut-off events. [2022-11-25 17:56:37,166 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-25 17:56:37,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 81 events. 34/81 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 297 event pairs, 22 based on Foata normal form. 5/75 useless extension candidates. Maximal degree in co-relation 180. Up to 70 conditions per place. [2022-11-25 17:56:37,169 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 12 selfloop transitions, 0 changer transitions 6/19 dead transitions. [2022-11-25 17:56:37,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 92 flow [2022-11-25 17:56:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:56:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:56:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2022-11-25 17:56:37,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46184738955823296 [2022-11-25 17:56:37,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2022-11-25 17:56:37,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2022-11-25 17:56:37,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:37,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2022-11-25 17:56:37,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,185 INFO L175 Difference]: Start difference. First operand has 21 places, 14 transitions, 46 flow. Second operand 3 states and 345 transitions. [2022-11-25 17:56:37,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 92 flow [2022-11-25 17:56:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:56:37,187 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 38 flow [2022-11-25 17:56:37,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2022-11-25 17:56:37,188 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-11-25 17:56:37,188 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 38 flow [2022-11-25 17:56:37,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:37,189 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:56:37,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:56:37,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:56:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash 844394032, now seen corresponding path program 1 times [2022-11-25 17:56:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:37,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946403576] [2022-11-25 17:56:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:37,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:37,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946403576] [2022-11-25 17:56:37,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946403576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:56:37,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:56:37,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:56:37,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104533969] [2022-11-25 17:56:37,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:56:37,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:56:37,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:56:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:56:37,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 249 [2022-11-25 17:56:37,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:37,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 249 [2022-11-25 17:56:37,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:37,337 INFO L130 PetriNetUnfolder]: 18/51 cut-off events. [2022-11-25 17:56:37,338 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-25 17:56:37,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 51 events. 18/51 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 178 event pairs, 10 based on Foata normal form. 9/52 useless extension candidates. Maximal degree in co-relation 114. Up to 34 conditions per place. [2022-11-25 17:56:37,339 INFO L137 encePairwiseOnDemand]: 245/249 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2022-11-25 17:56:37,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 15 transitions, 72 flow [2022-11-25 17:56:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:56:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:56:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2022-11-25 17:56:37,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.464524765729585 [2022-11-25 17:56:37,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2022-11-25 17:56:37,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2022-11-25 17:56:37,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:37,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2022-11-25 17:56:37,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,347 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 38 flow. Second operand 3 states and 347 transitions. [2022-11-25 17:56:37,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 15 transitions, 72 flow [2022-11-25 17:56:37,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 70 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:56:37,349 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 47 flow [2022-11-25 17:56:37,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2022-11-25 17:56:37,355 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 2 predicate places. [2022-11-25 17:56:37,355 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 47 flow [2022-11-25 17:56:37,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:37,356 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:56:37,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:56:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -280917821, now seen corresponding path program 1 times [2022-11-25 17:56:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:37,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487126596] [2022-11-25 17:56:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:37,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:37,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487126596] [2022-11-25 17:56:37,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487126596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:56:37,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:56:37,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:56:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620725241] [2022-11-25 17:56:37,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:56:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:56:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:56:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:56:37,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 249 [2022-11-25 17:56:37,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:37,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 249 [2022-11-25 17:56:37,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:37,646 INFO L130 PetriNetUnfolder]: 29/97 cut-off events. [2022-11-25 17:56:37,647 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:56:37,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 97 events. 29/97 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 416 event pairs, 8 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 262. Up to 50 conditions per place. [2022-11-25 17:56:37,648 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 21 selfloop transitions, 9 changer transitions 0/30 dead transitions. [2022-11-25 17:56:37,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 30 transitions, 163 flow [2022-11-25 17:56:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:56:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:56:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 684 transitions. [2022-11-25 17:56:37,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4578313253012048 [2022-11-25 17:56:37,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 684 transitions. [2022-11-25 17:56:37,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 684 transitions. [2022-11-25 17:56:37,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:37,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 684 transitions. [2022-11-25 17:56:37,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,658 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 47 flow. Second operand 6 states and 684 transitions. [2022-11-25 17:56:37,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 30 transitions, 163 flow [2022-11-25 17:56:37,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:56:37,663 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 79 flow [2022-11-25 17:56:37,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2022-11-25 17:56:37,665 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 6 predicate places. [2022-11-25 17:56:37,665 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 79 flow [2022-11-25 17:56:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:37,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:37,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:37,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:56:37,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:56:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2074773253, now seen corresponding path program 2 times [2022-11-25 17:56:37,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:37,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874034985] [2022-11-25 17:56:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:56:37,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:56:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:56:37,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:56:37,731 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:56:37,732 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-25 17:56:37,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-11-25 17:56:37,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:56:37,735 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-25 17:56:37,741 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 17:56:37,741 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:56:37,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:56:37 BasicIcfg [2022-11-25 17:56:37,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:56:37,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:56:37,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:56:37,773 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:56:37,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:32" (3/4) ... [2022-11-25 17:56:37,775 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 17:56:37,828 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 17:56:37,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:56:37,829 INFO L158 Benchmark]: Toolchain (without parser) took 7182.53ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 112.1MB in the beginning and 70.7MB in the end (delta: 41.4MB). Peak memory consumption was 73.2MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,829 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 104.9MB. Free memory was 53.3MB in the beginning and 53.2MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:56:37,830 INFO L158 Benchmark]: CACSL2BoogieTranslator took 762.15ms. Allocated memory is still 155.2MB. Free memory was 111.5MB in the beginning and 90.0MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,830 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.14ms. Allocated memory is still 155.2MB. Free memory was 90.0MB in the beginning and 87.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,830 INFO L158 Benchmark]: Boogie Preprocessor took 33.88ms. Allocated memory is still 155.2MB. Free memory was 87.9MB in the beginning and 86.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,831 INFO L158 Benchmark]: RCFGBuilder took 523.45ms. Allocated memory is still 155.2MB. Free memory was 86.5MB in the beginning and 113.8MB in the end (delta: -27.2MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,831 INFO L158 Benchmark]: TraceAbstraction took 5707.63ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 113.0MB in the beginning and 73.8MB in the end (delta: 39.1MB). Peak memory consumption was 70.4MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,832 INFO L158 Benchmark]: Witness Printer took 55.72ms. Allocated memory is still 186.6MB. Free memory was 73.8MB in the beginning and 70.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:56:37,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 104.9MB. Free memory was 53.3MB in the beginning and 53.2MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 762.15ms. Allocated memory is still 155.2MB. Free memory was 111.5MB in the beginning and 90.0MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.14ms. Allocated memory is still 155.2MB. Free memory was 90.0MB in the beginning and 87.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.88ms. Allocated memory is still 155.2MB. Free memory was 87.9MB in the beginning and 86.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 523.45ms. Allocated memory is still 155.2MB. Free memory was 86.5MB in the beginning and 113.8MB in the end (delta: -27.2MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * TraceAbstraction took 5707.63ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 113.0MB in the beginning and 73.8MB in the end (delta: 39.1MB). Peak memory consumption was 70.4MB. Max. memory is 16.1GB. * Witness Printer took 55.72ms. Allocated memory is still 186.6MB. Free memory was 73.8MB in the beginning and 70.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 117 PlacesBefore, 18 PlacesAfterwards, 119 TransitionsBefore, 17 TransitionsAfterwards, 3906 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 76 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 27 ConcurrentYvCompositions, 3 ChoiceCompositions, 129 TotalNumberOfCompositions, 4013 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3416, independent: 3335, independent conditional: 0, independent unconditional: 3335, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2921, independent: 2875, independent conditional: 0, independent unconditional: 2875, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2921, independent: 2867, independent conditional: 0, independent unconditional: 2867, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 54, independent: 8, independent conditional: 0, independent unconditional: 8, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 213, independent: 45, independent conditional: 0, independent unconditional: 45, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3416, independent: 460, independent conditional: 0, independent unconditional: 460, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 2921, unknown conditional: 0, unknown unconditional: 2921] , Statistics on independence cache: Total cache size (in pairs): 74, Positive cache size: 58, Positive conditional cache size: 0, Positive unconditional cache size: 58, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 690]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L697] 0 volatile int stoppingFlag; [L698] 0 volatile int pendingIo; [L699] 0 volatile int stoppingEvent; [L700] 0 volatile int stopped; [L756] 0 pthread_t t; [L757] 0 pendingIo = 1 [L758] 0 stoppingFlag = 0 [L759] 0 stoppingEvent = 0 [L760] 0 stopped = 0 [L761] FCALL, FORK 0 pthread_create(&t, 0, BCSP_PnpStop, 0) VAL [pendingIo=1, pthread_create(&t, 0, BCSP_PnpStop, 0)=-1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L762] CALL 0 BCSP_PnpAdd(0) [L734] 0 int status; [L735] CALL, EXPR 0 BCSP_IoIncrement() [L703] 0 int lsf = stoppingFlag; [L705] COND FALSE 0 !(\read(lsf)) VAL [lsf=0, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L745] 1 stoppingFlag = 1 [L747] CALL 1 BCSP_IoDecrement() [L725] 1 int pending; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L726] CALL, EXPR 1 dec() [L719] 1 pendingIo-- [L720] 1 int tmp = pendingIo; [L722] 1 return tmp; [L726] RET, EXPR 1 dec() [L726] 1 pending = dec() [L727] COND TRUE 1 pending == 0 [L729] 1 stoppingEvent = 1 [L747] RET 1 BCSP_IoDecrement() [L749] 1 int lse = stoppingEvent; [L751] CALL 1 assume_abort_if_not(lse) [L686] COND FALSE 1 !(!cond) [L751] RET 1 assume_abort_if_not(lse) [L752] 1 stopped = 1 [L753] 1 return 0; [L709] 0 int lp = pendingIo; VAL [lp=0, lsf=0, pendingIo=0, stopped=1, stoppingEvent=1, stoppingFlag=1] [L712] 0 pendingIo = lp + 1 [L715] 0 return 0; [L735] RET, EXPR 0 BCSP_IoIncrement() [L735] 0 status = BCSP_IoIncrement() [L736] COND TRUE 0 status == 0 [L737] 0 int local_assertion = !stopped; [L738] CALL 0 __VERIFIER_assert(local_assertion) [L689] COND TRUE 0 !(cond) [L690] 0 reach_error() VAL [\old(cond)=0, cond=0, pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 146 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.5s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 175 IncrementalHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 2 mSDtfsCounter, 175 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=4, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 17:56:37,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8f6ac3-bdb7-4509-9141-9f18308eee8b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE