./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-4e7fbc6 [2022-11-23 03:16:03,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:16:03,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:16:03,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:16:03,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:16:03,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:16:03,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:16:03,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:16:03,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:16:03,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:16:03,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:16:03,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:16:03,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:16:03,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:16:03,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:16:03,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:16:03,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:16:03,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:16:03,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:16:03,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:16:03,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:16:03,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:16:03,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:16:03,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:16:03,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:16:03,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:16:03,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:16:03,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:16:03,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:16:03,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:16:03,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:16:03,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:16:03,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:16:03,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:16:03,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:16:03,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:16:03,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:16:03,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:16:03,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:16:03,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:16:03,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:16:03,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:16:04,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:16:04,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:16:04,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:16:04,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:16:04,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:16:04,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:16:04,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:16:04,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:16:04,030 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:16:04,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:16:04,030 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:16:04,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:16:04,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:16:04,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:16:04,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:16:04,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:16:04,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:16:04,032 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:16:04,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:16:04,033 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:16:04,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:16:04,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:16:04,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:16:04,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:16:04,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:16:04,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:16:04,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:16:04,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:16:04,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:16:04,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:16:04,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:16:04,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:16:04,036 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:16:04,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:16:04,036 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_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 [2022-11-23 03:16:04,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:16:04,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:16:04,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:16:04,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:16:04,309 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:16:04,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread-lit/sssc12.i [2022-11-23 03:16:07,433 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:16:07,691 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:16:07,692 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/sv-benchmarks/c/pthread-lit/sssc12.i [2022-11-23 03:16:07,709 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/data/25dfe2eb4/b9d084a95c714cc28b507f93e1776955/FLAG83bdbc4b6 [2022-11-23 03:16:07,725 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/data/25dfe2eb4/b9d084a95c714cc28b507f93e1776955 [2022-11-23 03:16:07,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:16:07,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:16:07,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:16:07,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:16:07,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:16:07,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:16:07" (1/1) ... [2022-11-23 03:16:07,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353d6cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:07, skipping insertion in model container [2022-11-23 03:16:07,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:16:07" (1/1) ... [2022-11-23 03:16:07,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:16:07,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:16:08,387 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_46690c2f-5418-461a-a1be-03ac9fadfc21/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-11-23 03:16:08,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:16:08,436 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:16:08,487 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_46690c2f-5418-461a-a1be-03ac9fadfc21/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-11-23 03:16:08,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:16:08,552 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:16:08,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08 WrapperNode [2022-11-23 03:16:08,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:16:08,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:16:08,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:16:08,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:16:08,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,605 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-11-23 03:16:08,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:16:08,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:16:08,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:16:08,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:16:08,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:16:08,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:16:08,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:16:08,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:16:08,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (1/1) ... [2022-11-23 03:16:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:16:08,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:08,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:16:08,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:16:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:16:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-11-23 03:16:08,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-11-23 03:16:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:16:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:16:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:16:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:16:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:16:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:16:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:16:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:16:08,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:16:08,749 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:16:08,929 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:16:08,931 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:16:09,212 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:16:09,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:16:09,262 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 03:16:09,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:09 BoogieIcfgContainer [2022-11-23 03:16:09,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:16:09,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:16:09,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:16:09,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:16:09,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:16:07" (1/3) ... [2022-11-23 03:16:09,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1eea9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:09, skipping insertion in model container [2022-11-23 03:16:09,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:08" (2/3) ... [2022-11-23 03:16:09,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1eea9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:09, skipping insertion in model container [2022-11-23 03:16:09,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:09" (3/3) ... [2022-11-23 03:16:09,275 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2022-11-23 03:16:09,285 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:16:09,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:16:09,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:16:09,298 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:16:09,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:16:09,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-11-23 03:16:09,512 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-23 03:16:09,512 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:16:09,517 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. [2022-11-23 03:16:09,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 169 flow [2022-11-23 03:16:09,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 82 transitions, 169 flow [2022-11-23 03:16:09,526 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:16:09,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 82 transitions, 169 flow [2022-11-23 03:16:09,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 82 transitions, 169 flow [2022-11-23 03:16:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-11-23 03:16:09,575 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-23 03:16:09,575 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:16:09,576 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. [2022-11-23 03:16:09,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 990 [2022-11-23 03:16:13,181 INFO L134 LiptonReduction]: Checked pairs total: 895 [2022-11-23 03:16:13,181 INFO L136 LiptonReduction]: Total number of compositions: 92 [2022-11-23 03:16:13,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:16:13,206 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;@265f6fec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:16:13,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 03:16:13,210 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2022-11-23 03:16:13,210 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:16:13,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:13,211 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:16:13,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:16:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash 374894789, now seen corresponding path program 1 times [2022-11-23 03:16:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:13,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89129084] [2022-11-23 03:16:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:13,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89129084] [2022-11-23 03:16:13,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89129084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:13,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:13,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:16:13,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024128561] [2022-11-23 03:16:13,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:16:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:16:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:16:13,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 174 [2022-11-23 03:16:13,892 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) [2022-11-23 03:16:13,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:13,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 174 [2022-11-23 03:16:13,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:13,945 INFO L130 PetriNetUnfolder]: 13/34 cut-off events. [2022-11-23 03:16:13,946 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:16:13,946 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. [2022-11-23 03:16:13,948 INFO L137 encePairwiseOnDemand]: 169/174 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2022-11-23 03:16:13,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 15 transitions, 63 flow [2022-11-23 03:16:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:16:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:16:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2022-11-23 03:16:13,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2022-11-23 03:16:13,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 270 transitions. [2022-11-23 03:16:13,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 270 transitions. [2022-11-23 03:16:13,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:13,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 270 transitions. [2022-11-23 03:16:13,974 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) [2022-11-23 03:16:13,981 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) [2022-11-23 03:16:13,982 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) [2022-11-23 03:16:13,984 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 4 states and 270 transitions. [2022-11-23 03:16:13,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 15 transitions, 63 flow [2022-11-23 03:16:13,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:16:13,989 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 37 flow [2022-11-23 03:16:13,991 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} [2022-11-23 03:16:13,995 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2022-11-23 03:16:13,996 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 37 flow [2022-11-23 03:16:13,996 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) [2022-11-23 03:16:13,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:13,996 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 03:16:13,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:16:13,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:16:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1263226243, now seen corresponding path program 1 times [2022-11-23 03:16:13,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021682535] [2022-11-23 03:16:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:13,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:16:14,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:16:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:16:14,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:16:14,043 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:16:14,045 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-23 03:16:14,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-23 03:16:14,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-23 03:16:14,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:16:14,048 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 03:16:14,051 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:16:14,051 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 03:16:14,071 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:16:14,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-11-23 03:16:14,101 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-11-23 03:16:14,101 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:16:14,103 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. [2022-11-23 03:16:14,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 116 transitions, 244 flow [2022-11-23 03:16:14,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 244 flow [2022-11-23 03:16:14,105 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:16:14,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 116 transitions, 244 flow [2022-11-23 03:16:14,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 116 transitions, 244 flow [2022-11-23 03:16:14,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-11-23 03:16:14,132 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-11-23 03:16:14,133 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:16:14,134 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. [2022-11-23 03:16:14,137 INFO L119 LiptonReduction]: Number of co-enabled transitions 4224 [2022-11-23 03:16:17,420 INFO L134 LiptonReduction]: Checked pairs total: 7289 [2022-11-23 03:16:17,420 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-11-23 03:16:17,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:16:17,423 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;@265f6fec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:16:17,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 03:16:17,427 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-11-23 03:16:17,427 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:16:17,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:17,427 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:17,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 03:16:17,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash -736001519, now seen corresponding path program 1 times [2022-11-23 03:16:17,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:17,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337352720] [2022-11-23 03:16:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337352720] [2022-11-23 03:16:17,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337352720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:17,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:17,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:16:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538745534] [2022-11-23 03:16:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:17,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2022-11-23 03:16:17,503 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) [2022-11-23 03:16:17,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:17,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2022-11-23 03:16:17,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:17,641 INFO L130 PetriNetUnfolder]: 337/579 cut-off events. [2022-11-23 03:16:17,641 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-23 03:16:17,643 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. [2022-11-23 03:16:17,647 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 34 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-11-23 03:16:17,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 171 flow [2022-11-23 03:16:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2022-11-23 03:16:17,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47514619883040937 [2022-11-23 03:16:17,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2022-11-23 03:16:17,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2022-11-23 03:16:17,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:17,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2022-11-23 03:16:17,653 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) [2022-11-23 03:16:17,655 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) [2022-11-23 03:16:17,655 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) [2022-11-23 03:16:17,656 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 325 transitions. [2022-11-23 03:16:17,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 171 flow [2022-11-23 03:16:17,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-23 03:16:17,658 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 78 flow [2022-11-23 03:16:17,658 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} [2022-11-23 03:16:17,659 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-23 03:16:17,659 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 78 flow [2022-11-23 03:16:17,659 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) [2022-11-23 03:16:17,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:17,660 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:17,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:16:17,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 03:16:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash -533407505, now seen corresponding path program 1 times [2022-11-23 03:16:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244476280] [2022-11-23 03:16:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:17,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244476280] [2022-11-23 03:16:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244476280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:17,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:16:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367933653] [2022-11-23 03:16:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:16:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:16:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:16:17,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 228 [2022-11-23 03:16:17,902 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) [2022-11-23 03:16:17,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:17,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 228 [2022-11-23 03:16:17,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:18,191 INFO L130 PetriNetUnfolder]: 512/912 cut-off events. [2022-11-23 03:16:18,192 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-11-23 03:16:18,195 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. [2022-11-23 03:16:18,200 INFO L137 encePairwiseOnDemand]: 217/228 looper letters, 72 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2022-11-23 03:16:18,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 88 transitions, 397 flow [2022-11-23 03:16:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:16:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:16:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 609 transitions. [2022-11-23 03:16:18,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451754385964912 [2022-11-23 03:16:18,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 609 transitions. [2022-11-23 03:16:18,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 609 transitions. [2022-11-23 03:16:18,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:18,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 609 transitions. [2022-11-23 03:16:18,207 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) [2022-11-23 03:16:18,213 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) [2022-11-23 03:16:18,215 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) [2022-11-23 03:16:18,215 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 78 flow. Second operand 6 states and 609 transitions. [2022-11-23 03:16:18,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 88 transitions, 397 flow [2022-11-23 03:16:18,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 88 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:16:18,221 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 161 flow [2022-11-23 03:16:18,222 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} [2022-11-23 03:16:18,225 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2022-11-23 03:16:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 161 flow [2022-11-23 03:16:18,230 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) [2022-11-23 03:16:18,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:18,232 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 03:16:18,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:16:18,233 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)] === [2022-11-23 03:16:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash -213193553, now seen corresponding path program 1 times [2022-11-23 03:16:18,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:18,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278677785] [2022-11-23 03:16:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:16:18,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:16:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:16:18,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:16:18,278 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:16:18,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 03:16:18,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 03:16:18,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 03:16:18,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 03:16:18,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:16:18,279 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-23 03:16:18,280 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:16:18,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 03:16:18,303 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:16:18,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-11-23 03:16:18,350 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-11-23 03:16:18,350 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 03:16:18,353 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. [2022-11-23 03:16:18,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 150 transitions, 321 flow [2022-11-23 03:16:18,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 150 transitions, 321 flow [2022-11-23 03:16:18,355 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:16:18,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 150 transitions, 321 flow [2022-11-23 03:16:18,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 150 transitions, 321 flow [2022-11-23 03:16:18,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-11-23 03:16:18,383 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-11-23 03:16:18,383 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 03:16:18,385 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. [2022-11-23 03:16:18,390 INFO L119 LiptonReduction]: Number of co-enabled transitions 9702 [2022-11-23 03:16:22,141 INFO L134 LiptonReduction]: Checked pairs total: 18236 [2022-11-23 03:16:22,142 INFO L136 LiptonReduction]: Total number of compositions: 147 [2022-11-23 03:16:22,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:16:22,145 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;@265f6fec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:16:22,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 03:16:22,148 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2022-11-23 03:16:22,148 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:16:22,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:22,148 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:22,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:16:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1795250517, now seen corresponding path program 1 times [2022-11-23 03:16:22,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44742329] [2022-11-23 03:16:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:22,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44742329] [2022-11-23 03:16:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44742329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:22,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:22,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:16:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899854535] [2022-11-23 03:16:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:22,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:22,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:22,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2022-11-23 03:16:22,237 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) [2022-11-23 03:16:22,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:22,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2022-11-23 03:16:22,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:22,884 INFO L130 PetriNetUnfolder]: 4105/5966 cut-off events. [2022-11-23 03:16:22,884 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-11-23 03:16:22,897 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. [2022-11-23 03:16:22,931 INFO L137 encePairwiseOnDemand]: 292/297 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-11-23 03:16:22,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 263 flow [2022-11-23 03:16:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2022-11-23 03:16:22,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4792368125701459 [2022-11-23 03:16:22,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2022-11-23 03:16:22,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2022-11-23 03:16:22,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:22,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2022-11-23 03:16:22,935 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) [2022-11-23 03:16:22,937 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) [2022-11-23 03:16:22,938 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) [2022-11-23 03:16:22,938 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 103 flow. Second operand 3 states and 427 transitions. [2022-11-23 03:16:22,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 263 flow [2022-11-23 03:16:22,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 255 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-23 03:16:22,942 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 105 flow [2022-11-23 03:16:22,943 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} [2022-11-23 03:16:22,943 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2022-11-23 03:16:22,944 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 105 flow [2022-11-23 03:16:22,944 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) [2022-11-23 03:16:22,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:22,945 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:16:22,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:16:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1169497518, now seen corresponding path program 1 times [2022-11-23 03:16:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:22,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788868222] [2022-11-23 03:16:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:23,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:23,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788868222] [2022-11-23 03:16:23,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788868222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:23,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:23,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:16:23,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850063908] [2022-11-23 03:16:23,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:23,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:16:23,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:16:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:16:23,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-23 03:16:23,273 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) [2022-11-23 03:16:23,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:23,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-23 03:16:23,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:24,699 INFO L130 PetriNetUnfolder]: 7746/11288 cut-off events. [2022-11-23 03:16:24,699 INFO L131 PetriNetUnfolder]: For 1338/1338 co-relation queries the response was YES. [2022-11-23 03:16:24,728 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. [2022-11-23 03:16:24,802 INFO L137 encePairwiseOnDemand]: 283/297 looper letters, 111 selfloop transitions, 13 changer transitions 0/132 dead transitions. [2022-11-23 03:16:24,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 132 transitions, 594 flow [2022-11-23 03:16:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:16:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:16:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 803 transitions. [2022-11-23 03:16:24,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2022-11-23 03:16:24,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 803 transitions. [2022-11-23 03:16:24,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 803 transitions. [2022-11-23 03:16:24,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:24,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 803 transitions. [2022-11-23 03:16:24,820 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) [2022-11-23 03:16:24,826 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) [2022-11-23 03:16:24,827 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) [2022-11-23 03:16:24,827 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 105 flow. Second operand 6 states and 803 transitions. [2022-11-23 03:16:24,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 132 transitions, 594 flow [2022-11-23 03:16:24,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 132 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:16:24,843 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 215 flow [2022-11-23 03:16:24,844 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} [2022-11-23 03:16:24,844 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2022-11-23 03:16:24,845 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 215 flow [2022-11-23 03:16:24,845 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) [2022-11-23 03:16:24,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:24,846 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:24,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:16:24,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:16:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1593709791, now seen corresponding path program 1 times [2022-11-23 03:16:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:24,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416385373] [2022-11-23 03:16:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:16:24,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:24,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416385373] [2022-11-23 03:16:24,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416385373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:24,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:24,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:16:24,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869939949] [2022-11-23 03:16:24,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:24,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:24,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:24,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:24,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:24,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2022-11-23 03:16:24,948 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) [2022-11-23 03:16:24,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:24,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2022-11-23 03:16:24,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:26,678 INFO L130 PetriNetUnfolder]: 9989/14745 cut-off events. [2022-11-23 03:16:26,679 INFO L131 PetriNetUnfolder]: For 8132/8529 co-relation queries the response was YES. [2022-11-23 03:16:26,724 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. [2022-11-23 03:16:26,809 INFO L137 encePairwiseOnDemand]: 293/297 looper letters, 70 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-11-23 03:16:26,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 480 flow [2022-11-23 03:16:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2022-11-23 03:16:26,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2022-11-23 03:16:26,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2022-11-23 03:16:26,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2022-11-23 03:16:26,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:26,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2022-11-23 03:16:26,814 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) [2022-11-23 03:16:26,816 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) [2022-11-23 03:16:26,817 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) [2022-11-23 03:16:26,817 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 215 flow. Second operand 3 states and 426 transitions. [2022-11-23 03:16:26,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 480 flow [2022-11-23 03:16:26,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:16:26,827 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 220 flow [2022-11-23 03:16:26,827 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} [2022-11-23 03:16:26,828 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2022-11-23 03:16:26,828 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 220 flow [2022-11-23 03:16:26,829 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) [2022-11-23 03:16:26,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:26,829 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:26,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:16:26,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:16:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:26,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1894686150, now seen corresponding path program 1 times [2022-11-23 03:16:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970343583] [2022-11-23 03:16:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:26,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:27,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:27,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970343583] [2022-11-23 03:16:27,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970343583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:16:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216877029] [2022-11-23 03:16:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:27,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:16:27,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:27,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:16:27,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:16:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:27,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:16:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:16:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:27,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:16:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:27,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216877029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:16:27,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:16:27,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-11-23 03:16:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195425565] [2022-11-23 03:16:27,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:16:27,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:16:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:16:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:16:27,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-23 03:16:27,760 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) [2022-11-23 03:16:27,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:27,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-23 03:16:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:32,962 INFO L130 PetriNetUnfolder]: 23522/34508 cut-off events. [2022-11-23 03:16:32,962 INFO L131 PetriNetUnfolder]: For 19454/19766 co-relation queries the response was YES. [2022-11-23 03:16:33,051 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. [2022-11-23 03:16:33,226 INFO L137 encePairwiseOnDemand]: 283/297 looper letters, 450 selfloop transitions, 110 changer transitions 0/568 dead transitions. [2022-11-23 03:16:33,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 568 transitions, 3164 flow [2022-11-23 03:16:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 03:16:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-23 03:16:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4046 transitions. [2022-11-23 03:16:33,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394482458998588 [2022-11-23 03:16:33,238 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4046 transitions. [2022-11-23 03:16:33,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4046 transitions. [2022-11-23 03:16:33,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:33,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4046 transitions. [2022-11-23 03:16:33,250 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) [2022-11-23 03:16:33,264 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) [2022-11-23 03:16:33,268 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) [2022-11-23 03:16:33,268 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 220 flow. Second operand 31 states and 4046 transitions. [2022-11-23 03:16:33,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 568 transitions, 3164 flow [2022-11-23 03:16:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 568 transitions, 3126 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:16:33,316 INFO L231 Difference]: Finished difference. Result has 101 places, 164 transitions, 1365 flow [2022-11-23 03:16:33,316 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} [2022-11-23 03:16:33,317 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2022-11-23 03:16:33,317 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 164 transitions, 1365 flow [2022-11-23 03:16:33,320 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) [2022-11-23 03:16:33,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:33,320 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:33,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:16:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:16:33,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:16:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 587135408, now seen corresponding path program 1 times [2022-11-23 03:16:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006101360] [2022-11-23 03:16:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:16:33,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006101360] [2022-11-23 03:16:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006101360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:16:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575540288] [2022-11-23 03:16:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:33,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:16:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:16:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:16:33,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-23 03:16:33,823 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) [2022-11-23 03:16:33,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:33,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-23 03:16:33,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:41,991 INFO L130 PetriNetUnfolder]: 40925/59639 cut-off events. [2022-11-23 03:16:41,991 INFO L131 PetriNetUnfolder]: For 266551/266913 co-relation queries the response was YES. [2022-11-23 03:16:42,361 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. [2022-11-23 03:16:42,685 INFO L137 encePairwiseOnDemand]: 286/297 looper letters, 295 selfloop transitions, 21 changer transitions 0/334 dead transitions. [2022-11-23 03:16:42,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 334 transitions, 3314 flow [2022-11-23 03:16:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:16:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:16:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2022-11-23 03:16:42,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44276094276094274 [2022-11-23 03:16:42,689 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2022-11-23 03:16:42,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2022-11-23 03:16:42,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:42,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2022-11-23 03:16:42,692 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) [2022-11-23 03:16:42,695 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) [2022-11-23 03:16:42,696 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) [2022-11-23 03:16:42,697 INFO L175 Difference]: Start difference. First operand has 101 places, 164 transitions, 1365 flow. Second operand 6 states and 789 transitions. [2022-11-23 03:16:42,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 334 transitions, 3314 flow [2022-11-23 03:16:45,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 334 transitions, 2804 flow, removed 234 selfloop flow, removed 4 redundant places. [2022-11-23 03:16:45,186 INFO L231 Difference]: Finished difference. Result has 104 places, 172 transitions, 1187 flow [2022-11-23 03:16:45,187 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} [2022-11-23 03:16:45,187 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2022-11-23 03:16:45,187 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 172 transitions, 1187 flow [2022-11-23 03:16:45,188 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) [2022-11-23 03:16:45,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:45,188 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 03:16:45,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:16:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 136340398, now seen corresponding path program 2 times [2022-11-23 03:16:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025951985] [2022-11-23 03:16:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:45,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025951985] [2022-11-23 03:16:45,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025951985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:16:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92456987] [2022-11-23 03:16:45,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:16:45,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:16:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:45,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:16:45,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:16:45,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:16:45,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:16:45,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:16:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:16:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:45,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:16:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:45,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92456987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:16:45,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:16:45,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-23 03:16:45,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28462267] [2022-11-23 03:16:45,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:16:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 03:16:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 03:16:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:16:46,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2022-11-23 03:16:46,481 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) [2022-11-23 03:16:46,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:46,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2022-11-23 03:16:46,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:17:05,541 INFO L130 PetriNetUnfolder]: 77325/113107 cut-off events. [2022-11-23 03:17:05,541 INFO L131 PetriNetUnfolder]: For 1113304/1113652 co-relation queries the response was YES. [2022-11-23 03:17:06,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368720 conditions, 113107 events. 77325/113107 cut-off events. For 1113304/1113652 co-relation queries the response was YES. Maximal size of possible extension queue 4785. Compared 937762 event pairs, 8285 based on Foata normal form. 7100/107805 useless extension candidates. Maximal degree in co-relation 333123. Up to 24473 conditions per place. [2022-11-23 03:17:07,175 INFO L137 encePairwiseOnDemand]: 283/297 looper letters, 825 selfloop transitions, 260 changer transitions 0/1095 dead transitions. [2022-11-23 03:17:07,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1095 transitions, 8242 flow [2022-11-23 03:17:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 03:17:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-23 03:17:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6641 transitions. [2022-11-23 03:17:07,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43843665412292865 [2022-11-23 03:17:07,199 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6641 transitions. [2022-11-23 03:17:07,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6641 transitions. [2022-11-23 03:17:07,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:17:07,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6641 transitions. [2022-11-23 03:17:07,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 130.2156862745098) internal successors, (6641), 51 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 297.0) internal successors, (15444), 52 states have internal predecessors, (15444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,248 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 297.0) internal successors, (15444), 52 states have internal predecessors, (15444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,248 INFO L175 Difference]: Start difference. First operand has 104 places, 172 transitions, 1187 flow. Second operand 51 states and 6641 transitions. [2022-11-23 03:17:07,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1095 transitions, 8242 flow [2022-11-23 03:17:17,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1095 transitions, 8199 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:17:17,991 INFO L231 Difference]: Finished difference. Result has 183 places, 375 transitions, 3628 flow [2022-11-23 03:17:17,992 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3628, PETRI_PLACES=183, PETRI_TRANSITIONS=375} [2022-11-23 03:17:17,993 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2022-11-23 03:17:17,993 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 375 transitions, 3628 flow [2022-11-23 03:17:17,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-23 03:17:17,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:17:17,994 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 03:17:18,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 03:17:18,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46690c2f-5418-461a-a1be-03ac9fadfc21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 03:17:18,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 03:17:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -353252893, now seen corresponding path program 1 times [2022-11-23 03:17:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:18,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865026962] [2022-11-23 03:17:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:17:18,219 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:17:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:17:18,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:17:18,232 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:17:18,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 03:17:18,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 03:17:18,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-23 03:17:18,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 03:17:18,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 03:17:18,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 03:17:18,233 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-11-23 03:17:18,234 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:17:18,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 03:17:18,255 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:17:18,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 184 transitions, 400 flow [2022-11-23 03:17:18,290 INFO L130 PetriNetUnfolder]: 22/238 cut-off events. [2022-11-23 03:17:18,290 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 03:17:18,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 238 events. 22/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 631 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 198. Up to 10 conditions per place. [2022-11-23 03:17:18,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 184 transitions, 400 flow [2022-11-23 03:17:18,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 184 transitions, 400 flow [2022-11-23 03:17:18,295 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:17:18,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 184 transitions, 400 flow [2022-11-23 03:17:18,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 184 transitions, 400 flow [2022-11-23 03:17:18,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 184 transitions, 400 flow [2022-11-23 03:17:18,330 INFO L130 PetriNetUnfolder]: 22/238 cut-off events. [2022-11-23 03:17:18,330 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 03:17:18,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 238 events. 22/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 631 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 198. Up to 10 conditions per place. [2022-11-23 03:17:18,345 INFO L119 LiptonReduction]: Number of co-enabled transitions 17424 [2022-11-23 03:17:22,968 INFO L134 LiptonReduction]: Checked pairs total: 35330 [2022-11-23 03:17:22,968 INFO L136 LiptonReduction]: Total number of compositions: 181 [2022-11-23 03:17:22,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:17:22,970 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;@265f6fec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:17:22,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 03:17:22,974 INFO L130 PetriNetUnfolder]: 1/17 cut-off events. [2022-11-23 03:17:22,974 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:17:22,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:17:22,974 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:17:22,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 03:17:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1835680587, now seen corresponding path program 1 times [2022-11-23 03:17:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:22,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58124135] [2022-11-23 03:17:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:23,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58124135] [2022-11-23 03:17:23,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58124135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:17:23,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:17:23,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:17:23,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886048625] [2022-11-23 03:17:23,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:17:23,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:17:23,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:17:23,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:17:23,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 365 [2022-11-23 03:17:23,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:23,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:17:23,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 365 [2022-11-23 03:17:23,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:17:26,336 INFO L130 PetriNetUnfolder]: 36589/48586 cut-off events. [2022-11-23 03:17:26,336 INFO L131 PetriNetUnfolder]: For 7742/7742 co-relation queries the response was YES. [2022-11-23 03:17:26,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99077 conditions, 48586 events. 36589/48586 cut-off events. For 7742/7742 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 291324 event pairs, 16008 based on Foata normal form. 0/33831 useless extension candidates. Maximal degree in co-relation 10724. Up to 26947 conditions per place. [2022-11-23 03:17:26,611 INFO L137 encePairwiseOnDemand]: 360/365 looper letters, 68 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-11-23 03:17:26,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 351 flow [2022-11-23 03:17:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:17:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:17:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2022-11-23 03:17:26,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4812785388127854 [2022-11-23 03:17:26,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2022-11-23 03:17:26,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2022-11-23 03:17:26,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:17:26,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2022-11-23 03:17:26,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:26,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:26,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:26,619 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 134 flow. Second operand 3 states and 527 transitions. [2022-11-23 03:17:26,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 351 flow [2022-11-23 03:17:26,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 333 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-23 03:17:26,629 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 130 flow [2022-11-23 03:17:26,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2022-11-23 03:17:26,630 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2022-11-23 03:17:26,630 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 130 flow [2022-11-23 03:17:26,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:26,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:17:26,631 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:17:26,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 03:17:26,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 03:17:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1320153634, now seen corresponding path program 1 times [2022-11-23 03:17:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:26,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485124834] [2022-11-23 03:17:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:26,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:26,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485124834] [2022-11-23 03:17:26,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485124834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:17:26,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:17:26,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:17:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732429108] [2022-11-23 03:17:26,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:17:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:17:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:17:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:17:26,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 365 [2022-11-23 03:17:26,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 138.66666666666666) internal successors, (832), 6 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:26,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:17:26,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 365 [2022-11-23 03:17:26,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand