./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro --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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- 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-8393723 [2022-11-18 21:04:17,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:04:17,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:04:17,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:04:17,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:04:17,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:04:17,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:04:17,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:04:17,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:04:17,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:04:17,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:04:17,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:04:17,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:04:17,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:04:17,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:04:17,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:04:17,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:04:17,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:04:17,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:04:17,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:04:17,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:04:17,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:04:17,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:04:17,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:04:17,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:04:17,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:04:17,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:04:17,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:04:17,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:04:17,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:04:17,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:04:17,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:04:17,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:04:17,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:04:17,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:04:17,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:04:17,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:04:17,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:04:17,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:04:17,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:04:17,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:04:17,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:04:17,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:04:17,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:04:17,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:04:17,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:04:17,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:04:17,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:04:17,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:04:17,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:04:17,440 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:04:17,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:04:17,440 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:04:17,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:04:17,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:04:17,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:04:17,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:04:17,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:04:17,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:04:17,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:04:17,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:04:17,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:04:17,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:04:17,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:04:17,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:04:17,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:04:17,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:04:17,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:04:17,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:04:17,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:04:17,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:04:17,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:04:17,444 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:04:17,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:04:17,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:04:17,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-18 21:04:17,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:04:17,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:04:17,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:04:17,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:04:17,715 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:04:17,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-18 21:04:17,777 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/data/c02092686/bfdb90bfd7d147b6b64c51e4e0f3c403/FLAG756bf6f0c [2022-11-18 21:04:18,335 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:04:18,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-18 21:04:18,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/data/c02092686/bfdb90bfd7d147b6b64c51e4e0f3c403/FLAG756bf6f0c [2022-11-18 21:04:18,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/data/c02092686/bfdb90bfd7d147b6b64c51e4e0f3c403 [2022-11-18 21:04:18,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:04:18,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:04:18,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:04:18,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:04:18,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:04:18,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:18,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317bb324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18, skipping insertion in model container [2022-11-18 21:04:18,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:18,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:04:18,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:04:18,934 WARN L234 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_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-18 21:04:18,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:04:18,949 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:04:18,981 WARN L234 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_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-18 21:04:18,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:04:18,994 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:04:18,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18 WrapperNode [2022-11-18 21:04:18,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:04:18,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:04:18,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:04:18,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:04:19,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,029 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-18 21:04:19,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:04:19,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:04:19,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:04:19,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:04:19,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:04:19,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:04:19,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:04:19,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:04:19,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (1/1) ... [2022-11-18 21:04:19,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:04:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:19,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:04:19,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:04:19,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:04:19,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 21:04:19,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 21:04:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 21:04:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 21:04:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:04:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 21:04:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 21:04:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 21:04:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 21:04:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:04:19,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:04:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 21:04:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 21:04:19,142 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 21:04:19,236 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:04:19,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:04:19,447 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:04:19,493 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:04:19,494 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 21:04:19,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:19 BoogieIcfgContainer [2022-11-18 21:04:19,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:04:19,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:04:19,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:04:19,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:04:19,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:04:18" (1/3) ... [2022-11-18 21:04:19,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3950f785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:04:19, skipping insertion in model container [2022-11-18 21:04:19,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:18" (2/3) ... [2022-11-18 21:04:19,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3950f785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:04:19, skipping insertion in model container [2022-11-18 21:04:19,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:19" (3/3) ... [2022-11-18 21:04:19,515 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-18 21:04:19,526 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 21:04:19,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:04:19,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:04:19,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 21:04:19,627 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 21:04:19,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-11-18 21:04:19,733 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2022-11-18 21:04:19,733 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 21:04:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-11-18 21:04:19,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-11-18 21:04:19,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-11-18 21:04:19,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:04:19,766 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;@58ebef9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:04:19,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 21:04:19,791 INFO L130 PetriNetUnfolder]: 5/65 cut-off events. [2022-11-18 21:04:19,791 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 21:04:19,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:19,792 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:19,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1281560023, now seen corresponding path program 1 times [2022-11-18 21:04:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658339658] [2022-11-18 21:04:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:20,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:20,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658339658] [2022-11-18 21:04:20,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658339658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:20,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:20,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:04:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256511832] [2022-11-18 21:04:20,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:20,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 21:04:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 21:04:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:04:20,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 77 [2022-11-18 21:04:20,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 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) [2022-11-18 21:04:20,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:20,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 77 [2022-11-18 21:04:20,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:20,142 INFO L130 PetriNetUnfolder]: 11/96 cut-off events. [2022-11-18 21:04:20,142 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-18 21:04:20,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 96 events. 11/96 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 3 based on Foata normal form. 10/98 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-11-18 21:04:20,146 INFO L137 encePairwiseOnDemand]: 74/77 looper letters, 6 selfloop transitions, 0 changer transitions 1/63 dead transitions. [2022-11-18 21:04:20,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 150 flow [2022-11-18 21:04:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 21:04:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 21:04:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2022-11-18 21:04:20,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2022-11-18 21:04:20,166 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2022-11-18 21:04:20,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2022-11-18 21:04:20,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:20,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2022-11-18 21:04:20,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-18 21:04:20,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-11-18 21:04:20,190 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-11-18 21:04:20,192 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 2 states and 143 transitions. [2022-11-18 21:04:20,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 150 flow [2022-11-18 21:04:20,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 21:04:20,207 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 128 flow [2022-11-18 21:04:20,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-11-18 21:04:20,215 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2022-11-18 21:04:20,216 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 128 flow [2022-11-18 21:04:20,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 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) [2022-11-18 21:04:20,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:20,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:04:20,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 349637423, now seen corresponding path program 1 times [2022-11-18 21:04:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233465631] [2022-11-18 21:04:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:20,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:20,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233465631] [2022-11-18 21:04:20,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233465631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:20,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:20,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468295441] [2022-11-18 21:04:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:20,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-11-18 21:04:20,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 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) [2022-11-18 21:04:20,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:20,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-11-18 21:04:20,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:20,877 INFO L130 PetriNetUnfolder]: 8/99 cut-off events. [2022-11-18 21:04:20,879 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 21:04:20,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 99 events. 8/99 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 171 event pairs, 1 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 127. Up to 18 conditions per place. [2022-11-18 21:04:20,882 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 11 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2022-11-18 21:04:20,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 181 flow [2022-11-18 21:04:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 21:04:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2022-11-18 21:04:20,888 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2022-11-18 21:04:20,890 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2022-11-18 21:04:20,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2022-11-18 21:04:20,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:20,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2022-11-18 21:04:20,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 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) [2022-11-18 21:04:20,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2022-11-18 21:04:20,897 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2022-11-18 21:04:20,898 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 128 flow. Second operand 5 states and 325 transitions. [2022-11-18 21:04:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 181 flow [2022-11-18 21:04:20,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 21:04:20,901 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 146 flow [2022-11-18 21:04:20,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2022-11-18 21:04:20,902 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-11-18 21:04:20,902 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 146 flow [2022-11-18 21:04:20,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 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) [2022-11-18 21:04:20,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:20,903 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:20,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:04:20,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash 24264525, now seen corresponding path program 1 times [2022-11-18 21:04:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:20,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817420502] [2022-11-18 21:04:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817420502] [2022-11-18 21:04:21,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817420502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355937169] [2022-11-18 21:04:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:21,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:21,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:21,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:04:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:04:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:21,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:21,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355937169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:21,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:21,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-18 21:04:21,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385251415] [2022-11-18 21:04:21,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:21,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:04:21,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:04:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:04:21,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-18 21:04:21,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 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) [2022-11-18 21:04:21,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:21,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-18 21:04:21,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:21,711 INFO L130 PetriNetUnfolder]: 110/320 cut-off events. [2022-11-18 21:04:21,712 INFO L131 PetriNetUnfolder]: For 27/35 co-relation queries the response was YES. [2022-11-18 21:04:21,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 320 events. 110/320 cut-off events. For 27/35 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1428 event pairs, 11 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 611. Up to 41 conditions per place. [2022-11-18 21:04:21,716 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 52 selfloop transitions, 24 changer transitions 5/125 dead transitions. [2022-11-18 21:04:21,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 461 flow [2022-11-18 21:04:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:04:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 21:04:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-11-18 21:04:21,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-11-18 21:04:21,720 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-11-18 21:04:21,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-11-18 21:04:21,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:21,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-11-18 21:04:21,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 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) [2022-11-18 21:04:21,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 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) [2022-11-18 21:04:21,728 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 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) [2022-11-18 21:04:21,728 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 146 flow. Second operand 14 states and 854 transitions. [2022-11-18 21:04:21,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 461 flow [2022-11-18 21:04:21,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-18 21:04:21,732 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 288 flow [2022-11-18 21:04:21,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=288, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-11-18 21:04:21,734 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2022-11-18 21:04:21,734 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 288 flow [2022-11-18 21:04:21,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 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) [2022-11-18 21:04:21,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:21,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:21,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 21:04:21,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -465536495, now seen corresponding path program 2 times [2022-11-18 21:04:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049610348] [2022-11-18 21:04:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:22,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049610348] [2022-11-18 21:04:22,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049610348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:22,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:22,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508726022] [2022-11-18 21:04:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:22,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-18 21:04:22,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2022-11-18 21:04:22,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:22,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-18 21:04:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:22,234 INFO L130 PetriNetUnfolder]: 116/321 cut-off events. [2022-11-18 21:04:22,235 INFO L131 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-11-18 21:04:22,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 321 events. 116/321 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1412 event pairs, 48 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 869. Up to 162 conditions per place. [2022-11-18 21:04:22,242 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 50 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2022-11-18 21:04:22,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 504 flow [2022-11-18 21:04:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 21:04:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-11-18 21:04:22,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-11-18 21:04:22,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-11-18 21:04:22,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-11-18 21:04:22,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:22,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-11-18 21:04:22,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 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) [2022-11-18 21:04:22,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2022-11-18 21:04:22,249 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2022-11-18 21:04:22,249 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 288 flow. Second operand 5 states and 317 transitions. [2022-11-18 21:04:22,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 504 flow [2022-11-18 21:04:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 107 transitions, 502 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 21:04:22,256 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 357 flow [2022-11-18 21:04:22,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2022-11-18 21:04:22,257 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 24 predicate places. [2022-11-18 21:04:22,257 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 357 flow [2022-11-18 21:04:22,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2022-11-18 21:04:22,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:22,258 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:04:22,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash 88617565, now seen corresponding path program 3 times [2022-11-18 21:04:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:22,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513710388] [2022-11-18 21:04:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513710388] [2022-11-18 21:04:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513710388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:22,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846315108] [2022-11-18 21:04:22,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:04:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:22,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:22,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:04:22,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:04:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:22,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:04:22,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:22,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:22,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846315108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:22,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:22,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 21:04:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982287653] [2022-11-18 21:04:22,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:04:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:04:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:04:22,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-18 21:04:22,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 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) [2022-11-18 21:04:22,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:22,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-18 21:04:22,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:22,935 INFO L130 PetriNetUnfolder]: 166/507 cut-off events. [2022-11-18 21:04:22,935 INFO L131 PetriNetUnfolder]: For 671/673 co-relation queries the response was YES. [2022-11-18 21:04:22,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 507 events. 166/507 cut-off events. For 671/673 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2620 event pairs, 36 based on Foata normal form. 9/509 useless extension candidates. Maximal degree in co-relation 1363. Up to 114 conditions per place. [2022-11-18 21:04:22,940 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-11-18 21:04:22,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 839 flow [2022-11-18 21:04:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 21:04:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-11-18 21:04:22,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-11-18 21:04:22,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-11-18 21:04:22,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-11-18 21:04:22,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:22,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-11-18 21:04:22,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 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) [2022-11-18 21:04:22,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2022-11-18 21:04:22,946 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2022-11-18 21:04:22,946 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 357 flow. Second operand 9 states and 564 transitions. [2022-11-18 21:04:22,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 839 flow [2022-11-18 21:04:22,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 823 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 21:04:22,958 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 598 flow [2022-11-18 21:04:22,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2022-11-18 21:04:22,961 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-11-18 21:04:22,961 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 598 flow [2022-11-18 21:04:22,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 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) [2022-11-18 21:04:22,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:22,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:22,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:23,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1808089009, now seen corresponding path program 4 times [2022-11-18 21:04:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:23,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162589612] [2022-11-18 21:04:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:23,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162589612] [2022-11-18 21:04:23,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162589612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:23,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922776147] [2022-11-18 21:04:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:04:23,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:23,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:23,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:04:23,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:04:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:04:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:23,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:23,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922776147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:23,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:23,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 21:04:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93816465] [2022-11-18 21:04:23,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:04:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:04:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:04:23,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-18 21:04:23,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 598 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 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) [2022-11-18 21:04:23,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:23,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-18 21:04:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:23,856 INFO L130 PetriNetUnfolder]: 201/614 cut-off events. [2022-11-18 21:04:23,856 INFO L131 PetriNetUnfolder]: For 1320/1324 co-relation queries the response was YES. [2022-11-18 21:04:23,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 614 events. 201/614 cut-off events. For 1320/1324 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3480 event pairs, 21 based on Foata normal form. 11/619 useless extension candidates. Maximal degree in co-relation 1829. Up to 106 conditions per place. [2022-11-18 21:04:23,863 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 63 selfloop transitions, 52 changer transitions 1/160 dead transitions. [2022-11-18 21:04:23,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1069 flow [2022-11-18 21:04:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:04:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 21:04:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-11-18 21:04:23,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-11-18 21:04:23,866 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-11-18 21:04:23,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-11-18 21:04:23,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:23,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-11-18 21:04:23,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 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) [2022-11-18 21:04:23,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 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) [2022-11-18 21:04:23,870 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 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) [2022-11-18 21:04:23,871 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 598 flow. Second operand 12 states and 743 transitions. [2022-11-18 21:04:23,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1069 flow [2022-11-18 21:04:23,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 1063 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 21:04:23,880 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 800 flow [2022-11-18 21:04:23,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2022-11-18 21:04:23,881 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-11-18 21:04:23,882 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 800 flow [2022-11-18 21:04:23,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 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) [2022-11-18 21:04:23,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:23,882 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:23,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:24,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:24,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1386634823, now seen corresponding path program 5 times [2022-11-18 21:04:24,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:24,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390848943] [2022-11-18 21:04:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390848943] [2022-11-18 21:04:24,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390848943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:24,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:24,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989630797] [2022-11-18 21:04:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:24,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-18 21:04:24,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 800 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2022-11-18 21:04:24,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:24,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-18 21:04:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:24,349 INFO L130 PetriNetUnfolder]: 200/606 cut-off events. [2022-11-18 21:04:24,349 INFO L131 PetriNetUnfolder]: For 1751/1755 co-relation queries the response was YES. [2022-11-18 21:04:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 606 events. 200/606 cut-off events. For 1751/1755 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3431 event pairs, 92 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 1993. Up to 248 conditions per place. [2022-11-18 21:04:24,355 INFO L137 encePairwiseOnDemand]: 70/77 looper letters, 75 selfloop transitions, 22 changer transitions 1/142 dead transitions. [2022-11-18 21:04:24,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1121 flow [2022-11-18 21:04:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 21:04:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-11-18 21:04:24,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-11-18 21:04:24,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 369 transitions. [2022-11-18 21:04:24,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 369 transitions. [2022-11-18 21:04:24,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:24,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 369 transitions. [2022-11-18 21:04:24,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.5) internal successors, (369), 6 states have internal predecessors, (369), 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) [2022-11-18 21:04:24,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2022-11-18 21:04:24,363 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2022-11-18 21:04:24,363 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 800 flow. Second operand 6 states and 369 transitions. [2022-11-18 21:04:24,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1121 flow [2022-11-18 21:04:24,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 142 transitions, 1094 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-18 21:04:24,378 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 866 flow [2022-11-18 21:04:24,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-11-18 21:04:24,379 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-11-18 21:04:24,379 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 866 flow [2022-11-18 21:04:24,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2022-11-18 21:04:24,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:24,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 21:04:24,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash -172972305, now seen corresponding path program 6 times [2022-11-18 21:04:24,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:24,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061331086] [2022-11-18 21:04:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:24,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:24,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:24,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061331086] [2022-11-18 21:04:24,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061331086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:24,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:24,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711451707] [2022-11-18 21:04:24,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:24,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:24,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:24,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-18 21:04:24,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2022-11-18 21:04:24,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:24,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-18 21:04:24,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:24,654 INFO L130 PetriNetUnfolder]: 199/571 cut-off events. [2022-11-18 21:04:24,655 INFO L131 PetriNetUnfolder]: For 1971/1975 co-relation queries the response was YES. [2022-11-18 21:04:24,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 571 events. 199/571 cut-off events. For 1971/1975 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3116 event pairs, 90 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 2007. Up to 231 conditions per place. [2022-11-18 21:04:24,660 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-11-18 21:04:24,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1127 flow [2022-11-18 21:04:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 21:04:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-11-18 21:04:24,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-11-18 21:04:24,662 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-11-18 21:04:24,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-11-18 21:04:24,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:24,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-11-18 21:04:24,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 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) [2022-11-18 21:04:24,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2022-11-18 21:04:24,665 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2022-11-18 21:04:24,666 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 866 flow. Second operand 5 states and 315 transitions. [2022-11-18 21:04:24,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1127 flow [2022-11-18 21:04:24,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1092 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-18 21:04:24,683 INFO L231 Difference]: Finished difference. Result has 123 places, 122 transitions, 855 flow [2022-11-18 21:04:24,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2022-11-18 21:04:24,687 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2022-11-18 21:04:24,687 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 855 flow [2022-11-18 21:04:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2022-11-18 21:04:24,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:24,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:24,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 21:04:24,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1441489239, now seen corresponding path program 1 times [2022-11-18 21:04:24,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:24,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521098949] [2022-11-18 21:04:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:24,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:24,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521098949] [2022-11-18 21:04:24,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521098949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871229888] [2022-11-18 21:04:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:24,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:24,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:24,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:04:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 21:04:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:25,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:25,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871229888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:25,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:25,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-18 21:04:25,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269122072] [2022-11-18 21:04:25,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:25,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:04:25,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:04:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:25,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-11-18 21:04:25,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 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) [2022-11-18 21:04:25,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:25,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-11-18 21:04:25,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:25,381 INFO L130 PetriNetUnfolder]: 114/633 cut-off events. [2022-11-18 21:04:25,381 INFO L131 PetriNetUnfolder]: For 1210/1248 co-relation queries the response was YES. [2022-11-18 21:04:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 633 events. 114/633 cut-off events. For 1210/1248 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4271 event pairs, 16 based on Foata normal form. 19/640 useless extension candidates. Maximal degree in co-relation 1726. Up to 80 conditions per place. [2022-11-18 21:04:25,387 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-11-18 21:04:25,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 945 flow [2022-11-18 21:04:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 21:04:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-11-18 21:04:25,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-11-18 21:04:25,390 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-11-18 21:04:25,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-11-18 21:04:25,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:25,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-11-18 21:04:25,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 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) [2022-11-18 21:04:25,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2022-11-18 21:04:25,393 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2022-11-18 21:04:25,394 INFO L175 Difference]: Start difference. First operand has 123 places, 122 transitions, 855 flow. Second operand 6 states and 395 transitions. [2022-11-18 21:04:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 945 flow [2022-11-18 21:04:25,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 837 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-11-18 21:04:25,404 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 779 flow [2022-11-18 21:04:25,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2022-11-18 21:04:25,405 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 51 predicate places. [2022-11-18 21:04:25,405 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 779 flow [2022-11-18 21:04:25,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 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) [2022-11-18 21:04:25,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:25,406 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:25,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:25,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:25,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash -498357737, now seen corresponding path program 2 times [2022-11-18 21:04:25,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:25,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7175153] [2022-11-18 21:04:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:25,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:25,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7175153] [2022-11-18 21:04:25,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7175153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392998436] [2022-11-18 21:04:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:04:25,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:25,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:25,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:25,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:04:25,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:04:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:26,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:26,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392998436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:26,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:26,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-18 21:04:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928456722] [2022-11-18 21:04:26,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:04:26,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:04:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:04:26,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:26,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 779 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 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) [2022-11-18 21:04:26,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:26,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:26,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:26,722 INFO L130 PetriNetUnfolder]: 478/1432 cut-off events. [2022-11-18 21:04:26,723 INFO L131 PetriNetUnfolder]: For 2697/2697 co-relation queries the response was YES. [2022-11-18 21:04:26,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1432 events. 478/1432 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10462 event pairs, 159 based on Foata normal form. 1/1424 useless extension candidates. Maximal degree in co-relation 4656. Up to 556 conditions per place. [2022-11-18 21:04:26,734 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 74 selfloop transitions, 47 changer transitions 8/171 dead transitions. [2022-11-18 21:04:26,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1299 flow [2022-11-18 21:04:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:04:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 21:04:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-11-18 21:04:26,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-11-18 21:04:26,738 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-11-18 21:04:26,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-11-18 21:04:26,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:26,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-11-18 21:04:26,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 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) [2022-11-18 21:04:26,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 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) [2022-11-18 21:04:26,744 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 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) [2022-11-18 21:04:26,744 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 779 flow. Second operand 16 states and 924 transitions. [2022-11-18 21:04:26,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1299 flow [2022-11-18 21:04:26,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 171 transitions, 1283 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-18 21:04:26,756 INFO L231 Difference]: Finished difference. Result has 138 places, 137 transitions, 1000 flow [2022-11-18 21:04:26,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1000, PETRI_PLACES=138, PETRI_TRANSITIONS=137} [2022-11-18 21:04:26,757 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2022-11-18 21:04:26,758 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 137 transitions, 1000 flow [2022-11-18 21:04:26,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 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) [2022-11-18 21:04:26,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:26,759 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:26,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 21:04:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:04:26,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1809130697, now seen corresponding path program 3 times [2022-11-18 21:04:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:26,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655749667] [2022-11-18 21:04:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655749667] [2022-11-18 21:04:27,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655749667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085020956] [2022-11-18 21:04:27,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:04:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:27,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:27,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:04:27,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 21:04:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:27,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:27,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085020956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:27,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:27,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-18 21:04:27,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018393056] [2022-11-18 21:04:27,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:04:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:04:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:04:27,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:27,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 137 transitions, 1000 flow. Second operand has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 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) [2022-11-18 21:04:27,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:27,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:27,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:28,350 INFO L130 PetriNetUnfolder]: 637/1823 cut-off events. [2022-11-18 21:04:28,350 INFO L131 PetriNetUnfolder]: For 5334/5334 co-relation queries the response was YES. [2022-11-18 21:04:28,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 1823 events. 637/1823 cut-off events. For 5334/5334 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13796 event pairs, 119 based on Foata normal form. 17/1832 useless extension candidates. Maximal degree in co-relation 6858. Up to 359 conditions per place. [2022-11-18 21:04:28,367 INFO L137 encePairwiseOnDemand]: 66/77 looper letters, 124 selfloop transitions, 120 changer transitions 30/316 dead transitions. [2022-11-18 21:04:28,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 316 transitions, 2973 flow [2022-11-18 21:04:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 21:04:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-18 21:04:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-11-18 21:04:28,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-11-18 21:04:28,372 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-11-18 21:04:28,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-11-18 21:04:28,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:28,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-11-18 21:04:28,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 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) [2022-11-18 21:04:28,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 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) [2022-11-18 21:04:28,385 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 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) [2022-11-18 21:04:28,385 INFO L175 Difference]: Start difference. First operand has 138 places, 137 transitions, 1000 flow. Second operand 23 states and 1355 transitions. [2022-11-18 21:04:28,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 316 transitions, 2973 flow [2022-11-18 21:04:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 316 transitions, 2872 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-11-18 21:04:28,415 INFO L231 Difference]: Finished difference. Result has 164 places, 208 transitions, 1906 flow [2022-11-18 21:04:28,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1906, PETRI_PLACES=164, PETRI_TRANSITIONS=208} [2022-11-18 21:04:28,416 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2022-11-18 21:04:28,417 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 208 transitions, 1906 flow [2022-11-18 21:04:28,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 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) [2022-11-18 21:04:28,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:28,418 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:28,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:28,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash -125754799, now seen corresponding path program 4 times [2022-11-18 21:04:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202481586] [2022-11-18 21:04:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:28,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202481586] [2022-11-18 21:04:28,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202481586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:28,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516459080] [2022-11-18 21:04:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:04:28,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:28,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:28,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:28,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:04:28,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:04:28,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:29,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:29,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516459080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:29,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:29,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 21:04:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349213227] [2022-11-18 21:04:29,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:04:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:04:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:04:29,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:29,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 208 transitions, 1906 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 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) [2022-11-18 21:04:29,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:29,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:29,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:30,367 INFO L130 PetriNetUnfolder]: 886/2464 cut-off events. [2022-11-18 21:04:30,367 INFO L131 PetriNetUnfolder]: For 11800/11800 co-relation queries the response was YES. [2022-11-18 21:04:30,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 2464 events. 886/2464 cut-off events. For 11800/11800 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19677 event pairs, 97 based on Foata normal form. 21/2472 useless extension candidates. Maximal degree in co-relation 10896. Up to 401 conditions per place. [2022-11-18 21:04:30,395 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 151 selfloop transitions, 203 changer transitions 3/399 dead transitions. [2022-11-18 21:04:30,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 399 transitions, 4299 flow [2022-11-18 21:04:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 21:04:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 21:04:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-11-18 21:04:30,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-11-18 21:04:30,401 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-11-18 21:04:30,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-11-18 21:04:30,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:30,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-11-18 21:04:30,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 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) [2022-11-18 21:04:30,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 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) [2022-11-18 21:04:30,413 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 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) [2022-11-18 21:04:30,414 INFO L175 Difference]: Start difference. First operand has 164 places, 208 transitions, 1906 flow. Second operand 30 states and 1753 transitions. [2022-11-18 21:04:30,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 399 transitions, 4299 flow [2022-11-18 21:04:30,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 399 transitions, 4204 flow, removed 45 selfloop flow, removed 2 redundant places. [2022-11-18 21:04:30,503 INFO L231 Difference]: Finished difference. Result has 205 places, 301 transitions, 3478 flow [2022-11-18 21:04:30,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3478, PETRI_PLACES=205, PETRI_TRANSITIONS=301} [2022-11-18 21:04:30,505 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 137 predicate places. [2022-11-18 21:04:30,505 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 301 transitions, 3478 flow [2022-11-18 21:04:30,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 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) [2022-11-18 21:04:30,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:30,506 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:30,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:30,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:04:30,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:30,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1736632731, now seen corresponding path program 5 times [2022-11-18 21:04:30,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:30,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116607534] [2022-11-18 21:04:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:30,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:30,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116607534] [2022-11-18 21:04:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116607534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:30,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950778612] [2022-11-18 21:04:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:04:30,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:30,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:30,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:04:30,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 21:04:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:31,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950778612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:31,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:31,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-18 21:04:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829396290] [2022-11-18 21:04:31,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:31,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 21:04:31,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 21:04:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:04:31,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:31,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 301 transitions, 3478 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 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) [2022-11-18 21:04:31,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:31,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:31,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:33,021 INFO L130 PetriNetUnfolder]: 1071/3017 cut-off events. [2022-11-18 21:04:33,021 INFO L131 PetriNetUnfolder]: For 25403/25403 co-relation queries the response was YES. [2022-11-18 21:04:33,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15872 conditions, 3017 events. 1071/3017 cut-off events. For 25403/25403 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25427 event pairs, 75 based on Foata normal form. 3/3014 useless extension candidates. Maximal degree in co-relation 15819. Up to 314 conditions per place. [2022-11-18 21:04:33,065 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 210 selfloop transitions, 255 changer transitions 10/517 dead transitions. [2022-11-18 21:04:33,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 517 transitions, 6632 flow [2022-11-18 21:04:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 21:04:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-18 21:04:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2022-11-18 21:04:33,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2022-11-18 21:04:33,073 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2022-11-18 21:04:33,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2022-11-18 21:04:33,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:33,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2022-11-18 21:04:33,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 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) [2022-11-18 21:04:33,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 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) [2022-11-18 21:04:33,090 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 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) [2022-11-18 21:04:33,090 INFO L175 Difference]: Start difference. First operand has 205 places, 301 transitions, 3478 flow. Second operand 47 states and 2713 transitions. [2022-11-18 21:04:33,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 517 transitions, 6632 flow [2022-11-18 21:04:33,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 517 transitions, 6404 flow, removed 37 selfloop flow, removed 9 redundant places. [2022-11-18 21:04:33,261 INFO L231 Difference]: Finished difference. Result has 254 places, 390 transitions, 5130 flow [2022-11-18 21:04:33,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5130, PETRI_PLACES=254, PETRI_TRANSITIONS=390} [2022-11-18 21:04:33,262 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 186 predicate places. [2022-11-18 21:04:33,262 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 390 transitions, 5130 flow [2022-11-18 21:04:33,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 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) [2022-11-18 21:04:33,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:33,263 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:33,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:33,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:04:33,470 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1627335489, now seen corresponding path program 6 times [2022-11-18 21:04:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014961981] [2022-11-18 21:04:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:33,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:33,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014961981] [2022-11-18 21:04:33,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014961981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773846718] [2022-11-18 21:04:33,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:04:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:33,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:33,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:04:33,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:04:33,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:33,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:33,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773846718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:34,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:34,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 21:04:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261354267] [2022-11-18 21:04:34,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:04:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:04:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:04:34,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:34,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 390 transitions, 5130 flow. Second operand has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 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) [2022-11-18 21:04:34,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:34,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:34,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:35,996 INFO L130 PetriNetUnfolder]: 1271/3648 cut-off events. [2022-11-18 21:04:35,996 INFO L131 PetriNetUnfolder]: For 49994/49994 co-relation queries the response was YES. [2022-11-18 21:04:36,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22008 conditions, 3648 events. 1271/3648 cut-off events. For 49994/49994 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32680 event pairs, 100 based on Foata normal form. 19/3656 useless extension candidates. Maximal degree in co-relation 21944. Up to 573 conditions per place. [2022-11-18 21:04:36,046 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 185 selfloop transitions, 333 changer transitions 4/564 dead transitions. [2022-11-18 21:04:36,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 564 transitions, 8240 flow [2022-11-18 21:04:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 21:04:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-18 21:04:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2022-11-18 21:04:36,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2022-11-18 21:04:36,062 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2022-11-18 21:04:36,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2022-11-18 21:04:36,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:36,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2022-11-18 21:04:36,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 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) [2022-11-18 21:04:36,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 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) [2022-11-18 21:04:36,135 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 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) [2022-11-18 21:04:36,136 INFO L175 Difference]: Start difference. First operand has 254 places, 390 transitions, 5130 flow. Second operand 41 states and 2368 transitions. [2022-11-18 21:04:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 564 transitions, 8240 flow [2022-11-18 21:04:36,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 564 transitions, 7698 flow, removed 227 selfloop flow, removed 2 redundant places. [2022-11-18 21:04:36,451 INFO L231 Difference]: Finished difference. Result has 300 places, 456 transitions, 6627 flow [2022-11-18 21:04:36,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6627, PETRI_PLACES=300, PETRI_TRANSITIONS=456} [2022-11-18 21:04:36,453 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 232 predicate places. [2022-11-18 21:04:36,453 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 456 transitions, 6627 flow [2022-11-18 21:04:36,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 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) [2022-11-18 21:04:36,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:36,454 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:36,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:36,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 21:04:36,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1984456481, now seen corresponding path program 7 times [2022-11-18 21:04:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648442279] [2022-11-18 21:04:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:36,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648442279] [2022-11-18 21:04:36,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648442279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086563312] [2022-11-18 21:04:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:04:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:36,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:36,810 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:04:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:37,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:37,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086563312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:37,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:37,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-18 21:04:37,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376920194] [2022-11-18 21:04:37,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:37,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 21:04:37,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 21:04:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:04:37,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:37,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 456 transitions, 6627 flow. Second operand has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 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) [2022-11-18 21:04:37,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:37,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:37,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:39,709 INFO L130 PetriNetUnfolder]: 1311/3738 cut-off events. [2022-11-18 21:04:39,709 INFO L131 PetriNetUnfolder]: For 57926/57926 co-relation queries the response was YES. [2022-11-18 21:04:39,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3738 events. 1311/3738 cut-off events. For 57926/57926 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33779 event pairs, 94 based on Foata normal form. 27/3749 useless extension candidates. Maximal degree in co-relation 23428. Up to 471 conditions per place. [2022-11-18 21:04:39,841 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 238 selfloop transitions, 361 changer transitions 24/665 dead transitions. [2022-11-18 21:04:39,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 665 transitions, 10102 flow [2022-11-18 21:04:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-18 21:04:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-18 21:04:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2022-11-18 21:04:39,859 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2022-11-18 21:04:39,859 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2022-11-18 21:04:39,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2022-11-18 21:04:39,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:39,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2022-11-18 21:04:39,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 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) [2022-11-18 21:04:39,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 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) [2022-11-18 21:04:39,882 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 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) [2022-11-18 21:04:39,882 INFO L175 Difference]: Start difference. First operand has 300 places, 456 transitions, 6627 flow. Second operand 68 states and 3914 transitions. [2022-11-18 21:04:39,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 665 transitions, 10102 flow [2022-11-18 21:04:40,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 665 transitions, 9623 flow, removed 100 selfloop flow, removed 23 redundant places. [2022-11-18 21:04:40,152 INFO L231 Difference]: Finished difference. Result has 352 places, 491 transitions, 7737 flow [2022-11-18 21:04:40,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=7737, PETRI_PLACES=352, PETRI_TRANSITIONS=491} [2022-11-18 21:04:40,153 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2022-11-18 21:04:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 491 transitions, 7737 flow [2022-11-18 21:04:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 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) [2022-11-18 21:04:40,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:40,154 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:40,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 21:04:40,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -483096289, now seen corresponding path program 8 times [2022-11-18 21:04:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283439303] [2022-11-18 21:04:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283439303] [2022-11-18 21:04:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283439303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447416614] [2022-11-18 21:04:40,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:04:40,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:40,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:40,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:04:40,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:04:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:40,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447416614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:40,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:40,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-18 21:04:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254068414] [2022-11-18 21:04:40,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:04:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:04:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:04:40,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:40,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 491 transitions, 7737 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 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) [2022-11-18 21:04:40,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:40,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:40,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:43,938 INFO L130 PetriNetUnfolder]: 2281/6791 cut-off events. [2022-11-18 21:04:43,938 INFO L131 PetriNetUnfolder]: For 114020/114020 co-relation queries the response was YES. [2022-11-18 21:04:43,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43100 conditions, 6791 events. 2281/6791 cut-off events. For 114020/114020 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68160 event pairs, 353 based on Foata normal form. 6/6732 useless extension candidates. Maximal degree in co-relation 43022. Up to 1557 conditions per place. [2022-11-18 21:04:44,010 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 525 selfloop transitions, 343 changer transitions 12/922 dead transitions. [2022-11-18 21:04:44,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 922 transitions, 15651 flow [2022-11-18 21:04:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-18 21:04:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-18 21:04:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3315 transitions. [2022-11-18 21:04:44,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7552973342447027 [2022-11-18 21:04:44,017 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3315 transitions. [2022-11-18 21:04:44,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3315 transitions. [2022-11-18 21:04:44,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:44,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3315 transitions. [2022-11-18 21:04:44,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 58.1578947368421) internal successors, (3315), 57 states have internal predecessors, (3315), 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) [2022-11-18 21:04:44,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 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) [2022-11-18 21:04:44,033 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 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) [2022-11-18 21:04:44,034 INFO L175 Difference]: Start difference. First operand has 352 places, 491 transitions, 7737 flow. Second operand 57 states and 3315 transitions. [2022-11-18 21:04:44,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 922 transitions, 15651 flow [2022-11-18 21:04:44,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 922 transitions, 15073 flow, removed 98 selfloop flow, removed 33 redundant places. [2022-11-18 21:04:44,685 INFO L231 Difference]: Finished difference. Result has 406 places, 728 transitions, 12514 flow [2022-11-18 21:04:44,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=7336, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12514, PETRI_PLACES=406, PETRI_TRANSITIONS=728} [2022-11-18 21:04:44,686 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 338 predicate places. [2022-11-18 21:04:44,687 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 728 transitions, 12514 flow [2022-11-18 21:04:44,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 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) [2022-11-18 21:04:44,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:44,687 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:44,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:44,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:44,888 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1978662253, now seen corresponding path program 9 times [2022-11-18 21:04:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:44,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782499607] [2022-11-18 21:04:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:45,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:45,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782499607] [2022-11-18 21:04:45,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782499607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872373221] [2022-11-18 21:04:45,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:04:45,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:45,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:45,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:04:45,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 21:04:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:45,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:45,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872373221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:45,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:45,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-18 21:04:45,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236558272] [2022-11-18 21:04:45,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 21:04:45,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 21:04:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:04:45,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:45,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 728 transitions, 12514 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 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) [2022-11-18 21:04:45,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:45,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:45,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:48,269 INFO L130 PetriNetUnfolder]: 2300/6866 cut-off events. [2022-11-18 21:04:48,269 INFO L131 PetriNetUnfolder]: For 157159/157159 co-relation queries the response was YES. [2022-11-18 21:04:48,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48434 conditions, 6866 events. 2300/6866 cut-off events. For 157159/157159 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 69166 event pairs, 648 based on Foata normal form. 1/6765 useless extension candidates. Maximal degree in co-relation 48325. Up to 2132 conditions per place. [2022-11-18 21:04:48,354 INFO L137 encePairwiseOnDemand]: 66/77 looper letters, 485 selfloop transitions, 256 changer transitions 8/791 dead transitions. [2022-11-18 21:04:48,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 791 transitions, 14955 flow [2022-11-18 21:04:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 21:04:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 21:04:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-11-18 21:04:48,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-11-18 21:04:48,358 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-11-18 21:04:48,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-11-18 21:04:48,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:48,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-11-18 21:04:48,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 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) [2022-11-18 21:04:48,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 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) [2022-11-18 21:04:48,365 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 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) [2022-11-18 21:04:48,365 INFO L175 Difference]: Start difference. First operand has 406 places, 728 transitions, 12514 flow. Second operand 24 states and 1386 transitions. [2022-11-18 21:04:48,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 791 transitions, 14955 flow [2022-11-18 21:04:49,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 791 transitions, 14460 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-11-18 21:04:49,600 INFO L231 Difference]: Finished difference. Result has 432 places, 746 transitions, 12872 flow [2022-11-18 21:04:49,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12872, PETRI_PLACES=432, PETRI_TRANSITIONS=746} [2022-11-18 21:04:49,602 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 364 predicate places. [2022-11-18 21:04:49,602 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 746 transitions, 12872 flow [2022-11-18 21:04:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 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) [2022-11-18 21:04:49,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:04:49,603 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:49,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:49,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:04:49,804 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:04:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1173292429, now seen corresponding path program 10 times [2022-11-18 21:04:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:49,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108773567] [2022-11-18 21:04:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:49,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:49,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108773567] [2022-11-18 21:04:49,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108773567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:49,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221213364] [2022-11-18 21:04:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:04:49,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:49,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:49,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:04:50,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:04:50,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:04:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:50,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221213364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:50,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:50,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 21:04:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847584287] [2022-11-18 21:04:50,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:50,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:04:50,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:04:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:04:50,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:04:50,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 746 transitions, 12872 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 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) [2022-11-18 21:04:50,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:04:50,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:04:50,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:04:57,349 INFO L130 PetriNetUnfolder]: 4589/12738 cut-off events. [2022-11-18 21:04:57,349 INFO L131 PetriNetUnfolder]: For 315305/315305 co-relation queries the response was YES. [2022-11-18 21:04:57,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92599 conditions, 12738 events. 4589/12738 cut-off events. For 315305/315305 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 139750 event pairs, 609 based on Foata normal form. 68/12690 useless extension candidates. Maximal degree in co-relation 92481. Up to 2088 conditions per place. [2022-11-18 21:04:57,604 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 588 selfloop transitions, 1197 changer transitions 38/1865 dead transitions. [2022-11-18 21:04:57,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1865 transitions, 36408 flow [2022-11-18 21:04:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-18 21:04:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-18 21:04:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-11-18 21:04:57,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-11-18 21:04:57,617 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-11-18 21:04:57,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-11-18 21:04:57,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:04:57,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-11-18 21:04:57,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 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) [2022-11-18 21:04:57,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 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) [2022-11-18 21:04:57,652 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 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) [2022-11-18 21:04:57,652 INFO L175 Difference]: Start difference. First operand has 432 places, 746 transitions, 12872 flow. Second operand 86 states and 4916 transitions. [2022-11-18 21:04:57,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1865 transitions, 36408 flow [2022-11-18 21:05:00,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1865 transitions, 35637 flow, removed 66 selfloop flow, removed 6 redundant places. [2022-11-18 21:05:00,588 INFO L231 Difference]: Finished difference. Result has 535 places, 1518 transitions, 31372 flow [2022-11-18 21:05:00,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12563, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=31372, PETRI_PLACES=535, PETRI_TRANSITIONS=1518} [2022-11-18 21:05:00,589 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 467 predicate places. [2022-11-18 21:05:00,589 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1518 transitions, 31372 flow [2022-11-18 21:05:00,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 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) [2022-11-18 21:05:00,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:05:00,590 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:00,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 21:05:00,790 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:05:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -568551497, now seen corresponding path program 11 times [2022-11-18 21:05:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:00,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461410470] [2022-11-18 21:05:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:00,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:00,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461410470] [2022-11-18 21:05:00,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461410470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667924684] [2022-11-18 21:05:00,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:05:00,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:00,945 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:00,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:05:01,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 21:05:01,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:05:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:01,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:01,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667924684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:01,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:01,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 21:05:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668678140] [2022-11-18 21:05:01,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:05:01,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:05:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:05:01,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:05:01,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1518 transitions, 31372 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 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) [2022-11-18 21:05:01,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:05:01,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:05:01,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:05:12,802 INFO L130 PetriNetUnfolder]: 6208/16864 cut-off events. [2022-11-18 21:05:12,802 INFO L131 PetriNetUnfolder]: For 601548/601548 co-relation queries the response was YES. [2022-11-18 21:05:13,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143755 conditions, 16864 events. 6208/16864 cut-off events. For 601548/601548 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 192177 event pairs, 735 based on Foata normal form. 45/16760 useless extension candidates. Maximal degree in co-relation 143613. Up to 3615 conditions per place. [2022-11-18 21:05:13,432 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 662 selfloop transitions, 1498 changer transitions 29/2231 dead transitions. [2022-11-18 21:05:13,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 2231 transitions, 50601 flow [2022-11-18 21:05:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-18 21:05:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-18 21:05:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3930 transitions. [2022-11-18 21:05:13,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7396950875211745 [2022-11-18 21:05:13,439 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3930 transitions. [2022-11-18 21:05:13,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3930 transitions. [2022-11-18 21:05:13,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:05:13,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3930 transitions. [2022-11-18 21:05:13,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.95652173913044) internal successors, (3930), 69 states have internal predecessors, (3930), 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) [2022-11-18 21:05:13,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 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) [2022-11-18 21:05:13,456 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 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) [2022-11-18 21:05:13,456 INFO L175 Difference]: Start difference. First operand has 535 places, 1518 transitions, 31372 flow. Second operand 69 states and 3930 transitions. [2022-11-18 21:05:13,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 2231 transitions, 50601 flow [2022-11-18 21:05:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 2231 transitions, 49765 flow, removed 322 selfloop flow, removed 26 redundant places. [2022-11-18 21:05:20,208 INFO L231 Difference]: Finished difference. Result has 593 places, 1973 transitions, 46881 flow [2022-11-18 21:05:20,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=30741, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1057, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=46881, PETRI_PLACES=593, PETRI_TRANSITIONS=1973} [2022-11-18 21:05:20,210 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 525 predicate places. [2022-11-18 21:05:20,210 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 1973 transitions, 46881 flow [2022-11-18 21:05:20,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 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) [2022-11-18 21:05:20,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:05:20,211 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:20,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:20,417 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 21:05:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash -218088945, now seen corresponding path program 12 times [2022-11-18 21:05:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438799484] [2022-11-18 21:05:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:20,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438799484] [2022-11-18 21:05:20,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438799484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311661395] [2022-11-18 21:05:20,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:05:20,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:20,566 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:20,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc8e869-bc68-4ffb-94bb-fe3f61523de2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:05:20,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 21:05:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:05:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:20,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:20,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311661395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:20,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:20,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 21:05:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467477968] [2022-11-18 21:05:20,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:20,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:05:20,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:20,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:05:20,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:05:20,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-18 21:05:20,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 1973 transitions, 46881 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 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) [2022-11-18 21:05:20,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:05:20,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-18 21:05:20,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:05:35,453 INFO L130 PetriNetUnfolder]: 6280/17457 cut-off events. [2022-11-18 21:05:35,453 INFO L131 PetriNetUnfolder]: For 758654/758654 co-relation queries the response was YES. [2022-11-18 21:05:35,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158380 conditions, 17457 events. 6280/17457 cut-off events. For 758654/758654 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 202790 event pairs, 929 based on Foata normal form. 8/17287 useless extension candidates. Maximal degree in co-relation 158225. Up to 2399 conditions per place. [2022-11-18 21:05:36,014 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 777 selfloop transitions, 1444 changer transitions 14/2277 dead transitions. [2022-11-18 21:05:36,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 2277 transitions, 57333 flow [2022-11-18 21:05:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 21:05:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-18 21:05:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4071 transitions. [2022-11-18 21:05:36,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7446497164807024 [2022-11-18 21:05:36,022 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4071 transitions. [2022-11-18 21:05:36,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4071 transitions. [2022-11-18 21:05:36,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:05:36,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4071 transitions. [2022-11-18 21:05:36,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 57.33802816901409) internal successors, (4071), 71 states have internal predecessors, (4071), 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) [2022-11-18 21:05:36,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 77.0) internal successors, (5544), 72 states have internal predecessors, (5544), 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) [2022-11-18 21:05:36,044 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 77.0) internal successors, (5544), 72 states have internal predecessors, (5544), 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) [2022-11-18 21:05:36,044 INFO L175 Difference]: Start difference. First operand has 593 places, 1973 transitions, 46881 flow. Second operand 71 states and 4071 transitions. [2022-11-18 21:05:36,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 2277 transitions, 57333 flow