./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/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_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/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_1660adc6-7a39-48a9-846d-99294e274034/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 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 --- 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 17:38:26,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:38:26,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:38:26,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:38:26,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:38:26,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:38:26,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:38:26,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:38:26,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:38:26,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:38:26,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:38:26,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:38:26,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:38:26,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:38:26,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:38:26,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:38:26,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:38:26,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:38:26,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:38:27,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:38:27,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:38:27,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:38:27,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:38:27,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:38:27,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:38:27,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:38:27,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:38:27,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:38:27,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:38:27,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:38:27,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:38:27,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:38:27,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:38:27,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:38:27,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:38:27,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:38:27,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:38:27,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:38:27,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:38:27,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:38:27,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:38:27,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:38:27,074 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:38:27,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:38:27,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:38:27,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:38:27,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:38:27,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:38:27,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:38:27,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:38:27,085 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:38:27,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:38:27,087 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:38:27,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:38:27,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:38:27,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:38:27,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:38:27,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:38:27,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:38:27,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:38:27,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:38:27,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:38:27,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:38:27,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:38:27,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:38:27,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:38:27,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:38:27,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:38:27,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:38:27,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:38:27,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:38:27,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:38:27,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:38:27,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:38:27,094 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:38:27,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:38:27,095 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_1660adc6-7a39-48a9-846d-99294e274034/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 [2022-11-25 17:38:27,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:38:27,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:38:27,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:38:27,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:38:27,521 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:38:27,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-lit/sssc12.i [2022-11-25 17:38:31,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:38:31,691 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:38:31,692 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/sv-benchmarks/c/pthread-lit/sssc12.i [2022-11-25 17:38:31,722 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/data/b4f826bf8/6c933faa06174a2b866a29f8ed590500/FLAGfe0bab90d [2022-11-25 17:38:31,746 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/data/b4f826bf8/6c933faa06174a2b866a29f8ed590500 [2022-11-25 17:38:31,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:38:31,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:38:31,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:38:31,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:38:31,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:38:31,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:38:31" (1/1) ... [2022-11-25 17:38:31,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d63dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:31, skipping insertion in model container [2022-11-25 17:38:31,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:38:31" (1/1) ... [2022-11-25 17:38:31,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:38:31,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:38:32,475 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_1660adc6-7a39-48a9-846d-99294e274034/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-11-25 17:38:32,485 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:32,487 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:32,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:32,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:32,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:38:32,515 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:38:32,560 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_1660adc6-7a39-48a9-846d-99294e274034/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-11-25 17:38:32,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:32,564 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:32,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:32,566 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:32,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:38:32,677 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:38:32,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32 WrapperNode [2022-11-25 17:38:32,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:38:32,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:38:32,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:38:32,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:38:32,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,777 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-11-25 17:38:32,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:38:32,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:38:32,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:38:32,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:38:32,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:38:32,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:38:32,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:38:32,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:38:32,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (1/1) ... [2022-11-25 17:38:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:38:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:38:32,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:38:32,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:38:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:38:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-11-25 17:38:32,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-11-25 17:38:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:38:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:38:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:38:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:38:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:38:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:38:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:38:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:38:32,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:38:32,949 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 17:38:33,112 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:38:33,114 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:38:33,430 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:38:33,506 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:38:33,506 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:38:33,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:38:33 BoogieIcfgContainer [2022-11-25 17:38:33,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:38:33,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:38:33,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:38:33,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:38:33,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:38:31" (1/3) ... [2022-11-25 17:38:33,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b77149d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:38:33, skipping insertion in model container [2022-11-25 17:38:33,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:32" (2/3) ... [2022-11-25 17:38:33,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b77149d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:38:33, skipping insertion in model container [2022-11-25 17:38:33,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:38:33" (3/3) ... [2022-11-25 17:38:33,535 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2022-11-25 17:38:33,549 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:38:33,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:38:33,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:38:33,565 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:38:33,699 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:38:33,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-11-25 17:38:33,839 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-25 17:38:33,839 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:33,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-11-25 17:38:33,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 169 flow [2022-11-25 17:38:33,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 82 transitions, 169 flow [2022-11-25 17:38:33,857 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:33,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 82 transitions, 169 flow [2022-11-25 17:38:33,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 82 transitions, 169 flow [2022-11-25 17:38:33,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-11-25 17:38:33,916 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-25 17:38:33,917 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:33,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-11-25 17:38:33,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 990 [2022-11-25 17:38:38,432 INFO L134 LiptonReduction]: Checked pairs total: 895 [2022-11-25 17:38:38,433 INFO L136 LiptonReduction]: Total number of compositions: 92 [2022-11-25 17:38:38,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:38,462 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;@3501f1f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:38,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:38:38,468 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2022-11-25 17:38:38,468 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:38,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:38,469 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:38:38,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:38:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 374894789, now seen corresponding path program 1 times [2022-11-25 17:38:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:38,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617989160] [2022-11-25 17:38:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:39,046 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 17:38:39,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617989160] [2022-11-25 17:38:39,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617989160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:39,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:39,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356813535] [2022-11-25 17:38:39,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:38:39,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:38:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:38:39,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 174 [2022-11-25 17:38:39,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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 17:38:39,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:39,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 174 [2022-11-25 17:38:39,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:39,242 INFO L130 PetriNetUnfolder]: 13/34 cut-off events. [2022-11-25 17:38:39,242 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 66 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 60. Up to 19 conditions per place. [2022-11-25 17:38:39,244 INFO L137 encePairwiseOnDemand]: 169/174 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2022-11-25 17:38:39,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 15 transitions, 63 flow [2022-11-25 17:38:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:38:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:38:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2022-11-25 17:38:39,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2022-11-25 17:38:39,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 270 transitions. [2022-11-25 17:38:39,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 270 transitions. [2022-11-25 17:38:39,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:39,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 270 transitions. [2022-11-25 17:38:39,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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 17:38:39,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 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 17:38:39,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 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 17:38:39,300 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 4 states and 270 transitions. [2022-11-25 17:38:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 15 transitions, 63 flow [2022-11-25 17:38:39,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:39,306 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 37 flow [2022-11-25 17:38:39,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2022-11-25 17:38:39,313 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2022-11-25 17:38:39,313 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 37 flow [2022-11-25 17:38:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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 17:38:39,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:39,314 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:38:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:38:39,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:38:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1263226243, now seen corresponding path program 1 times [2022-11-25 17:38:39,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:39,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873055655] [2022-11-25 17:38:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:39,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:38:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:39,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:38:39,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:38:39,376 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 17:38:39,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 17:38:39,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 17:38:39,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:38:39,380 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:38:39,383 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:38:39,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:38:39,406 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:38:39,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-11-25 17:38:39,445 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-11-25 17:38:39,446 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:39,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 12/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-11-25 17:38:39,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 116 transitions, 244 flow [2022-11-25 17:38:39,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 244 flow [2022-11-25 17:38:39,450 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:39,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 116 transitions, 244 flow [2022-11-25 17:38:39,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 116 transitions, 244 flow [2022-11-25 17:38:39,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-11-25 17:38:39,482 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-11-25 17:38:39,483 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:39,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 12/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-11-25 17:38:39,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 4224 [2022-11-25 17:38:43,504 INFO L134 LiptonReduction]: Checked pairs total: 7289 [2022-11-25 17:38:43,504 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-11-25 17:38:43,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:43,509 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;@3501f1f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:43,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:38:43,526 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-11-25 17:38:43,527 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:38:43,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:43,528 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:43,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:38:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash -736001519, now seen corresponding path program 1 times [2022-11-25 17:38:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:43,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492805107] [2022-11-25 17:38:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:43,671 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 17:38:43,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492805107] [2022-11-25 17:38:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492805107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:43,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:43,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:43,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391240004] [2022-11-25 17:38:43,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:43,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:43,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:43,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:43,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2022-11-25 17:38:43,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 17:38:43,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:43,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2022-11-25 17:38:43,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:43,924 INFO L130 PetriNetUnfolder]: 337/579 cut-off events. [2022-11-25 17:38:43,924 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-25 17:38:43,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 579 events. 337/579 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2982 event pairs, 147 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 570. Up to 326 conditions per place. [2022-11-25 17:38:43,936 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 34 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-11-25 17:38:43,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 171 flow [2022-11-25 17:38:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2022-11-25 17:38:43,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47514619883040937 [2022-11-25 17:38:43,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2022-11-25 17:38:43,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2022-11-25 17:38:43,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:43,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2022-11-25 17:38:43,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 17:38:43,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 17:38:43,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 17:38:43,953 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 325 transitions. [2022-11-25 17:38:43,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 171 flow [2022-11-25 17:38:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:43,957 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 78 flow [2022-11-25 17:38:43,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-11-25 17:38:43,959 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-25 17:38:43,959 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 78 flow [2022-11-25 17:38:43,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 17:38:43,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:43,960 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:43,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:38:43,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:38:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash -533407505, now seen corresponding path program 1 times [2022-11-25 17:38:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:43,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070260276] [2022-11-25 17:38:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:44,282 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 17:38:44,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070260276] [2022-11-25 17:38:44,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070260276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:44,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:44,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:38:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729188704] [2022-11-25 17:38:44,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:44,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:38:44,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:44,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:38:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:38:44,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 228 [2022-11-25 17:38:44,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 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 17:38:44,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:44,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 228 [2022-11-25 17:38:44,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:44,729 INFO L130 PetriNetUnfolder]: 512/912 cut-off events. [2022-11-25 17:38:44,730 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-11-25 17:38:44,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 912 events. 512/912 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5159 event pairs, 111 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 1084. Up to 337 conditions per place. [2022-11-25 17:38:44,738 INFO L137 encePairwiseOnDemand]: 217/228 looper letters, 72 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2022-11-25 17:38:44,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 88 transitions, 397 flow [2022-11-25 17:38:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:38:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:38:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 609 transitions. [2022-11-25 17:38:44,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451754385964912 [2022-11-25 17:38:44,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 609 transitions. [2022-11-25 17:38:44,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 609 transitions. [2022-11-25 17:38:44,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:44,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 609 transitions. [2022-11-25 17:38:44,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.5) internal successors, (609), 6 states have internal predecessors, (609), 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 17:38:44,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 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 17:38:44,749 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 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 17:38:44,749 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 78 flow. Second operand 6 states and 609 transitions. [2022-11-25 17:38:44,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 88 transitions, 397 flow [2022-11-25 17:38:44,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 88 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:38:44,753 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 161 flow [2022-11-25 17:38:44,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2022-11-25 17:38:44,754 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2022-11-25 17:38:44,754 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 161 flow [2022-11-25 17:38:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 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 17:38:44,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:44,755 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:38:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:38:44,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:38:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash -213193553, now seen corresponding path program 1 times [2022-11-25 17:38:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039884577] [2022-11-25 17:38:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:44,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:38:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:44,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:38:44,794 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:38:44,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 17:38:44,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 17:38:44,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 17:38:44,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 17:38:44,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:38:44,807 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:38:44,807 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:38:44,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:38:44,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:38:44,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-11-25 17:38:44,872 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-11-25 17:38:44,873 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:38:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 190 events. 17/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2022-11-25 17:38:44,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 150 transitions, 321 flow [2022-11-25 17:38:44,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 150 transitions, 321 flow [2022-11-25 17:38:44,877 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:44,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 150 transitions, 321 flow [2022-11-25 17:38:44,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 150 transitions, 321 flow [2022-11-25 17:38:44,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-11-25 17:38:44,907 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-11-25 17:38:44,907 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:38:44,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 190 events. 17/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2022-11-25 17:38:44,915 INFO L119 LiptonReduction]: Number of co-enabled transitions 9702 [2022-11-25 17:38:49,590 INFO L134 LiptonReduction]: Checked pairs total: 18236 [2022-11-25 17:38:49,591 INFO L136 LiptonReduction]: Total number of compositions: 147 [2022-11-25 17:38:49,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:49,595 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;@3501f1f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:49,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:38:49,599 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-11-25 17:38:49,599 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:38:49,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:49,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:49,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:38:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1795250517, now seen corresponding path program 1 times [2022-11-25 17:38:49,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:49,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131023430] [2022-11-25 17:38:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:49,721 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 17:38:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:49,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131023430] [2022-11-25 17:38:49,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131023430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:49,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:49,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:49,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496206996] [2022-11-25 17:38:49,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:49,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:49,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2022-11-25 17:38:49,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 17:38:49,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:49,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2022-11-25 17:38:49,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:50,696 INFO L130 PetriNetUnfolder]: 4105/5966 cut-off events. [2022-11-25 17:38:50,697 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-11-25 17:38:50,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12093 conditions, 5966 events. 4105/5966 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34334 event pairs, 1819 based on Foata normal form. 0/4312 useless extension candidates. Maximal degree in co-relation 2102. Up to 3294 conditions per place. [2022-11-25 17:38:50,751 INFO L137 encePairwiseOnDemand]: 292/297 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-11-25 17:38:50,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 263 flow [2022-11-25 17:38:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2022-11-25 17:38:50,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4792368125701459 [2022-11-25 17:38:50,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2022-11-25 17:38:50,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2022-11-25 17:38:50,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:50,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2022-11-25 17:38:50,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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 17:38:50,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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 17:38:50,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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 17:38:50,762 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 103 flow. Second operand 3 states and 427 transitions. [2022-11-25 17:38:50,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 263 flow [2022-11-25 17:38:50,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 255 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:50,773 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 105 flow [2022-11-25 17:38:50,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-11-25 17:38:50,777 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2022-11-25 17:38:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 105 flow [2022-11-25 17:38:50,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 17:38:50,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:50,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:50,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:38:50,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:38:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1169497518, now seen corresponding path program 1 times [2022-11-25 17:38:50,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:50,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587259235] [2022-11-25 17:38:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:50,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:51,022 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 17:38:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:51,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587259235] [2022-11-25 17:38:51,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587259235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:51,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:51,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:38:51,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268634193] [2022-11-25 17:38:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:51,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:38:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:38:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:38:51,141 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-25 17:38:51,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 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 17:38:51,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:51,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-25 17:38:51,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:52,804 INFO L130 PetriNetUnfolder]: 7746/11288 cut-off events. [2022-11-25 17:38:52,805 INFO L131 PetriNetUnfolder]: For 1338/1338 co-relation queries the response was YES. [2022-11-25 17:38:52,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23779 conditions, 11288 events. 7746/11288 cut-off events. For 1338/1338 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 72375 event pairs, 1187 based on Foata normal form. 0/8538 useless extension candidates. Maximal degree in co-relation 13133. Up to 4599 conditions per place. [2022-11-25 17:38:52,906 INFO L137 encePairwiseOnDemand]: 283/297 looper letters, 111 selfloop transitions, 13 changer transitions 0/132 dead transitions. [2022-11-25 17:38:52,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 132 transitions, 594 flow [2022-11-25 17:38:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:38:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:38:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 803 transitions. [2022-11-25 17:38:52,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2022-11-25 17:38:52,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 803 transitions. [2022-11-25 17:38:52,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 803 transitions. [2022-11-25 17:38:52,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:52,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 803 transitions. [2022-11-25 17:38:52,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.83333333333334) internal successors, (803), 6 states have internal predecessors, (803), 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 17:38:52,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 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 17:38:52,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 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 17:38:52,922 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 105 flow. Second operand 6 states and 803 transitions. [2022-11-25 17:38:52,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 132 transitions, 594 flow [2022-11-25 17:38:52,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 132 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:38:52,939 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 215 flow [2022-11-25 17:38:52,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2022-11-25 17:38:52,942 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2022-11-25 17:38:52,942 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 215 flow [2022-11-25 17:38:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 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 17:38:52,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:52,943 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:38:52,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:38:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1593709791, now seen corresponding path program 1 times [2022-11-25 17:38:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492931495] [2022-11-25 17:38:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:38:53,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:53,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492931495] [2022-11-25 17:38:53,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492931495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:53,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:53,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:53,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044272526] [2022-11-25 17:38:53,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:53,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:53,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:53,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2022-11-25 17:38:53,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 17:38:53,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:53,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2022-11-25 17:38:53,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:55,444 INFO L130 PetriNetUnfolder]: 9989/14745 cut-off events. [2022-11-25 17:38:55,445 INFO L131 PetriNetUnfolder]: For 8132/8529 co-relation queries the response was YES. [2022-11-25 17:38:55,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36928 conditions, 14745 events. 9989/14745 cut-off events. For 8132/8529 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 100624 event pairs, 4379 based on Foata normal form. 163/12659 useless extension candidates. Maximal degree in co-relation 14307. Up to 8440 conditions per place. [2022-11-25 17:38:55,601 INFO L137 encePairwiseOnDemand]: 293/297 looper letters, 70 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-11-25 17:38:55,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 480 flow [2022-11-25 17:38:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2022-11-25 17:38:55,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2022-11-25 17:38:55,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2022-11-25 17:38:55,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2022-11-25 17:38:55,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:55,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2022-11-25 17:38:55,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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 17:38:55,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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 17:38:55,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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 17:38:55,611 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 215 flow. Second operand 3 states and 426 transitions. [2022-11-25 17:38:55,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 480 flow [2022-11-25 17:38:55,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:55,626 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 220 flow [2022-11-25 17:38:55,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2022-11-25 17:38:55,629 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2022-11-25 17:38:55,630 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 220 flow [2022-11-25 17:38:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 17:38:55,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:55,631 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:38:55,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:38:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1894686150, now seen corresponding path program 1 times [2022-11-25 17:38:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998005068] [2022-11-25 17:38:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:55,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998005068] [2022-11-25 17:38:55,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998005068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:38:55,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685429952] [2022-11-25 17:38:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:55,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:38:55,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:38:55,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:38:55,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:38:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:56,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:38:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:56,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:56,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685429952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:56,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:38:56,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-11-25 17:38:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038167199] [2022-11-25 17:38:56,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:56,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:38:56,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:38:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:38:56,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-25 17:38:56,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 220 flow. Second operand has 14 states, 14 states have (on average 114.14285714285714) internal successors, (1598), 14 states have internal predecessors, (1598), 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 17:38:56,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:56,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-25 17:38:56,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:02,961 INFO L130 PetriNetUnfolder]: 23522/34508 cut-off events. [2022-11-25 17:39:02,962 INFO L131 PetriNetUnfolder]: For 19454/19766 co-relation queries the response was YES. [2022-11-25 17:39:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89139 conditions, 34508 events. 23522/34508 cut-off events. For 19454/19766 co-relation queries the response was YES. Maximal size of possible extension queue 2213. Compared 259054 event pairs, 1217 based on Foata normal form. 208/30020 useless extension candidates. Maximal degree in co-relation 88861. Up to 4989 conditions per place. [2022-11-25 17:39:03,444 INFO L137 encePairwiseOnDemand]: 283/297 looper letters, 450 selfloop transitions, 110 changer transitions 0/568 dead transitions. [2022-11-25 17:39:03,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 568 transitions, 3164 flow [2022-11-25 17:39:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:39:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 17:39:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4046 transitions. [2022-11-25 17:39:03,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394482458998588 [2022-11-25 17:39:03,461 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4046 transitions. [2022-11-25 17:39:03,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4046 transitions. [2022-11-25 17:39:03,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:03,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4046 transitions. [2022-11-25 17:39:03,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 130.51612903225808) internal successors, (4046), 31 states have internal predecessors, (4046), 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 17:39:03,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 297.0) internal successors, (9504), 32 states have internal predecessors, (9504), 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 17:39:03,504 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 297.0) internal successors, (9504), 32 states have internal predecessors, (9504), 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 17:39:03,504 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 220 flow. Second operand 31 states and 4046 transitions. [2022-11-25 17:39:03,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 568 transitions, 3164 flow [2022-11-25 17:39:03,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 568 transitions, 3126 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:39:03,578 INFO L231 Difference]: Finished difference. Result has 101 places, 164 transitions, 1365 flow [2022-11-25 17:39:03,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1365, PETRI_PLACES=101, PETRI_TRANSITIONS=164} [2022-11-25 17:39:03,580 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2022-11-25 17:39:03,580 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 164 transitions, 1365 flow [2022-11-25 17:39:03,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 114.14285714285714) internal successors, (1598), 14 states have internal predecessors, (1598), 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 17:39:03,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:03,582 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:03,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:39:03,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:39:03,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:39:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash 587135408, now seen corresponding path program 1 times [2022-11-25 17:39:03,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:39:03,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480349999] [2022-11-25 17:39:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:03,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:39:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:39:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:39:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480349999] [2022-11-25 17:39:03,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480349999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:39:03,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:39:03,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:39:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797198668] [2022-11-25 17:39:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:39:03,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:39:03,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:39:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:39:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:39:04,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-25 17:39:04,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 164 transitions, 1365 flow. Second operand has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 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 17:39:04,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:04,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-25 17:39:04,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:13,874 INFO L130 PetriNetUnfolder]: 40925/59639 cut-off events. [2022-11-25 17:39:13,874 INFO L131 PetriNetUnfolder]: For 266551/266913 co-relation queries the response was YES. [2022-11-25 17:39:14,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201792 conditions, 59639 events. 40925/59639 cut-off events. For 266551/266913 co-relation queries the response was YES. Maximal size of possible extension queue 3909. Compared 471596 event pairs, 12205 based on Foata normal form. 106/52857 useless extension candidates. Maximal degree in co-relation 176613. Up to 32633 conditions per place. [2022-11-25 17:39:14,817 INFO L137 encePairwiseOnDemand]: 286/297 looper letters, 295 selfloop transitions, 21 changer transitions 0/334 dead transitions. [2022-11-25 17:39:14,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 334 transitions, 3314 flow [2022-11-25 17:39:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:39:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:39:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2022-11-25 17:39:14,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44276094276094274 [2022-11-25 17:39:14,825 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2022-11-25 17:39:14,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2022-11-25 17:39:14,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:14,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2022-11-25 17:39:14,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 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 17:39:14,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 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 17:39:14,841 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 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 17:39:14,842 INFO L175 Difference]: Start difference. First operand has 101 places, 164 transitions, 1365 flow. Second operand 6 states and 789 transitions. [2022-11-25 17:39:14,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 334 transitions, 3314 flow [2022-11-25 17:39:18,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 334 transitions, 2804 flow, removed 234 selfloop flow, removed 4 redundant places. [2022-11-25 17:39:18,407 INFO L231 Difference]: Finished difference. Result has 104 places, 172 transitions, 1187 flow [2022-11-25 17:39:18,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1187, PETRI_PLACES=104, PETRI_TRANSITIONS=172} [2022-11-25 17:39:18,409 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2022-11-25 17:39:18,409 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 172 transitions, 1187 flow [2022-11-25 17:39:18,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 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 17:39:18,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:18,410 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:18,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:39:18,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:39:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:18,411 INFO L85 PathProgramCache]: Analyzing trace with hash 136340398, now seen corresponding path program 2 times [2022-11-25 17:39:18,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:39:18,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739599199] [2022-11-25 17:39:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:39:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:39:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:39:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739599199] [2022-11-25 17:39:18,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739599199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:39:18,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923625208] [2022-11-25 17:39:18,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:39:18,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:39:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:39:18,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:39:18,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1660adc6-7a39-48a9-846d-99294e274034/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:39:18,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:39:18,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:39:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:39:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:39:18,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:39:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:39:19,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923625208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:39:19,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:39:19,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-25 17:39:19,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634281871] [2022-11-25 17:39:19,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:39:19,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:39:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:39:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:39:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:39:19,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-25 17:39:19,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 172 transitions, 1187 flow. Second operand has 20 states, 20 states have (on average 113.8) internal successors, (2276), 20 states have internal predecessors, (2276), 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 17:39:19,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:19,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-25 17:39:19,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand