./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ --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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- 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-dbf71c6-m [2022-10-17 10:16:58,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:16:58,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:16:58,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:16:58,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:16:58,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:16:58,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:16:58,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:16:58,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:16:58,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:16:58,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:16:58,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:16:58,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:16:58,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:16:58,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:16:58,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:16:58,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:16:58,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:16:58,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:16:58,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:16:58,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:16:58,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:16:58,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:16:58,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:16:58,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:16:58,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:16:58,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:16:58,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:16:58,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:16:58,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:16:58,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:16:58,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:16:58,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:16:58,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:16:58,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:16:58,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:16:58,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:16:58,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:16:58,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:16:58,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:16:58,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:16:58,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:16:58,749 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:16:58,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:16:58,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:16:58,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:16:58,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:16:58,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:16:58,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:16:58,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:16:58,752 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:16:58,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:16:58,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:16:58,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:16:58,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:16:58,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:16:58,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:16:58,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:16:58,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:16:58,754 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:16:58,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:16:58,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:16:58,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:16:58,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:16:58,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:16:58,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:16:58,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:16:58,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:16:58,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:16:58,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:16:58,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:16:58,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:16:58,757 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:16:58,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:16:58,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:16:58,771 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_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-10-17 10:16:59,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:16:59,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:16:59,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:16:59,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:16:59,068 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:16:59,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-10-17 10:16:59,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/data/b563f09f3/5e265804e8c64b41826cea2026e0cb6e/FLAG97170fb1a [2022-10-17 10:16:59,634 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:16:59,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-10-17 10:16:59,645 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/data/b563f09f3/5e265804e8c64b41826cea2026e0cb6e/FLAG97170fb1a [2022-10-17 10:16:59,989 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/data/b563f09f3/5e265804e8c64b41826cea2026e0cb6e [2022-10-17 10:16:59,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:16:59,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:16:59,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:16:59,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:17:00,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:17:00,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:16:59" (1/1) ... [2022-10-17 10:17:00,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1184b2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00, skipping insertion in model container [2022-10-17 10:17:00,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:16:59" (1/1) ... [2022-10-17 10:17:00,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:17:00,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:17:00,237 WARN L230 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_b440f0ad-e422-4aef-92fb-02fe07126cd6/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-10-17 10:17:00,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:17:00,249 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:17:00,270 WARN L230 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_b440f0ad-e422-4aef-92fb-02fe07126cd6/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-10-17 10:17:00,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:17:00,286 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:17:00,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00 WrapperNode [2022-10-17 10:17:00,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:17:00,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:17:00,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:17:00,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:17:00,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,323 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-10-17 10:17:00,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:17:00,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:17:00,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:17:00,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:17:00,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:17:00,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:17:00,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:17:00,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:17:00,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (1/1) ... [2022-10-17 10:17:00,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:17:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:00,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:17:00,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:17:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:17:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:17:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:17:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:17:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:17:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:17:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:17:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:17:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:17:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:17:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:17:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:17:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:17:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:17:00,449 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:17:00,591 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:17:00,593 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:17:00,863 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:17:00,898 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:17:00,898 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:17:00,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:17:00 BoogieIcfgContainer [2022-10-17 10:17:00,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:17:00,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:17:00,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:17:00,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:17:00,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:16:59" (1/3) ... [2022-10-17 10:17:00,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26310282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:17:00, skipping insertion in model container [2022-10-17 10:17:00,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:00" (2/3) ... [2022-10-17 10:17:00,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26310282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:17:00, skipping insertion in model container [2022-10-17 10:17:00,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:17:00" (3/3) ... [2022-10-17 10:17:00,911 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-10-17 10:17:00,920 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:17:00,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:17:00,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:17:00,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:17:00,985 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:17:01,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-10-17 10:17:01,083 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-10-17 10:17:01,083 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:17:01,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-10-17 10:17:01,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-10-17 10:17:01,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-10-17 10:17:01,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:17:01,113 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;@6ecf22d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:17:01,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:17:01,151 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-10-17 10:17:01,151 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:17:01,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:01,152 INFO L208 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] [2022-10-17 10:17:01,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1254133550, now seen corresponding path program 1 times [2022-10-17 10:17:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533800933] [2022-10-17 10:17:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533800933] [2022-10-17 10:17:01,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533800933] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:01,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:01,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:17:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022587255] [2022-10-17 10:17:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:01,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:17:01,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:17:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:17:01,491 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-10-17 10:17:01,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-10-17 10:17:01,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:01,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-10-17 10:17:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:01,548 INFO L130 PetriNetUnfolder]: 4/76 cut-off events. [2022-10-17 10:17:01,548 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-10-17 10:17:01,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-10-17 10:17:01,551 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-10-17 10:17:01,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-10-17 10:17:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:17:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:17:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-10-17 10:17:01,567 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-10-17 10:17:01,568 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-10-17 10:17:01,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-10-17 10:17:01,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:01,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-10-17 10:17:01,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-10-17 10:17:01,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2022-10-17 10:17:01,583 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2022-10-17 10:17:01,586 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-10-17 10:17:01,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-10-17 10:17:01,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:17:01,596 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-10-17 10:17:01,598 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-10-17 10:17:01,603 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-10-17 10:17:01,604 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-10-17 10:17:01,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-10-17 10:17:01,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:01,605 INFO L208 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] [2022-10-17 10:17:01,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:17:01,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-10-17 10:17:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:01,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076673861] [2022-10-17 10:17:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:02,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076673861] [2022-10-17 10:17:02,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076673861] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:02,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:17:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365363531] [2022-10-17 10:17:02,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:02,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:17:02,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:17:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:17:02,350 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-10-17 10:17:02,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:02,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:02,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-10-17 10:17:02,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:02,603 INFO L130 PetriNetUnfolder]: 50/172 cut-off events. [2022-10-17 10:17:02,603 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-10-17 10:17:02,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 491 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-10-17 10:17:02,609 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-10-17 10:17:02,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-10-17 10:17:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:17:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:17:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-10-17 10:17:02,621 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-10-17 10:17:02,621 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-10-17 10:17:02,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-10-17 10:17:02,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:02,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-10-17 10:17:02,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-10-17 10:17:02,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2022-10-17 10:17:02,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2022-10-17 10:17:02,634 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-10-17 10:17:02,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-10-17 10:17:02,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:02,638 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-10-17 10:17:02,639 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-10-17 10:17:02,640 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-10-17 10:17:02,641 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-10-17 10:17:02,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:02,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:02,643 INFO L208 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, 1, 1, 1] [2022-10-17 10:17:02,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:17:02,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-10-17 10:17:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083567318] [2022-10-17 10:17:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:03,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:03,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083567318] [2022-10-17 10:17:03,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083567318] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:03,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239404504] [2022-10-17 10:17:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:03,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:03,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:03,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:03,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:17:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:17:03,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:03,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:03,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239404504] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:03,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:03,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-10-17 10:17:03,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987579543] [2022-10-17 10:17:03,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:03,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:17:03,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:17:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:17:03,483 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-10-17 10:17:03,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 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) [2022-10-17 10:17:03,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:03,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-10-17 10:17:03,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:03,790 INFO L130 PetriNetUnfolder]: 91/351 cut-off events. [2022-10-17 10:17:03,790 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-10-17 10:17:03,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1530 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-10-17 10:17:03,795 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-10-17 10:17:03,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-10-17 10:17:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:17:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-10-17 10:17:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-10-17 10:17:03,800 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-10-17 10:17:03,800 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-10-17 10:17:03,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-10-17 10:17:03,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:03,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-10-17 10:17:03,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 states have internal predecessors, (704), 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) [2022-10-17 10:17:03,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 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) [2022-10-17 10:17:03,809 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 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) [2022-10-17 10:17:03,809 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-10-17 10:17:03,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-10-17 10:17:03,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:17:03,815 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-10-17 10:17:03,815 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-10-17 10:17:03,817 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-10-17 10:17:03,817 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-10-17 10:17:03,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 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) [2022-10-17 10:17:03,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:03,818 INFO L208 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, 1, 1, 1] [2022-10-17 10:17:03,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:04,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash -628521019, now seen corresponding path program 2 times [2022-10-17 10:17:04,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887470920] [2022-10-17 10:17:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887470920] [2022-10-17 10:17:04,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887470920] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019927494] [2022-10-17 10:17:04,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:17:04,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:04,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:04,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:04,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:17:04,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:17:04,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:17:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:17:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:17:04,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:17:04,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019927494] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:04,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:17:04,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-10-17 10:17:04,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395564429] [2022-10-17 10:17:04,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:04,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:17:04,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:17:04,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:17:04,616 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-10-17 10:17:04,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-10-17 10:17:04,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:04,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-10-17 10:17:04,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:04,872 INFO L130 PetriNetUnfolder]: 69/269 cut-off events. [2022-10-17 10:17:04,872 INFO L131 PetriNetUnfolder]: For 416/422 co-relation queries the response was YES. [2022-10-17 10:17:04,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 269 events. 69/269 cut-off events. For 416/422 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1047 event pairs, 15 based on Foata normal form. 12/273 useless extension candidates. Maximal degree in co-relation 708. Up to 68 conditions per place. [2022-10-17 10:17:04,879 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-10-17 10:17:04,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-10-17 10:17:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:17:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:17:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-10-17 10:17:04,882 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-10-17 10:17:04,883 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-10-17 10:17:04,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-10-17 10:17:04,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:04,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-10-17 10:17:04,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 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) [2022-10-17 10:17:04,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 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) [2022-10-17 10:17:04,890 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 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) [2022-10-17 10:17:04,891 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-10-17 10:17:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-10-17 10:17:04,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:17:04,906 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-10-17 10:17:04,907 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-10-17 10:17:04,909 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-10-17 10:17:04,909 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-10-17 10:17:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-10-17 10:17:04,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:04,910 INFO L208 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:05,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1629171339, now seen corresponding path program 1 times [2022-10-17 10:17:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14812188] [2022-10-17 10:17:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:05,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:05,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14812188] [2022-10-17 10:17:05,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14812188] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:05,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383746036] [2022-10-17 10:17:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:05,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:05,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:17:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:17:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:05,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:06,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383746036] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:06,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:06,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-10-17 10:17:06,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508216854] [2022-10-17 10:17:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:06,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:17:06,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:17:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:17:06,105 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-10-17 10:17:06,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 12 states, 12 states have (on average 63.083333333333336) internal successors, (757), 12 states have internal predecessors, (757), 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) [2022-10-17 10:17:06,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:06,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-10-17 10:17:06,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:06,627 INFO L130 PetriNetUnfolder]: 185/527 cut-off events. [2022-10-17 10:17:06,627 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2022-10-17 10:17:06,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 527 events. 185/527 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2605 event pairs, 17 based on Foata normal form. 20/543 useless extension candidates. Maximal degree in co-relation 1717. Up to 145 conditions per place. [2022-10-17 10:17:06,635 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 76 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2022-10-17 10:17:06,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 1138 flow [2022-10-17 10:17:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:17:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:17:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 852 transitions. [2022-10-17 10:17:06,639 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-10-17 10:17:06,640 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 852 transitions. [2022-10-17 10:17:06,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 852 transitions. [2022-10-17 10:17:06,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:06,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 852 transitions. [2022-10-17 10:17:06,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.53846153846153) internal successors, (852), 13 states have internal predecessors, (852), 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) [2022-10-17 10:17:06,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 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) [2022-10-17 10:17:06,648 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 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) [2022-10-17 10:17:06,648 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 13 states and 852 transitions. [2022-10-17 10:17:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 1138 flow [2022-10-17 10:17:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 172 transitions, 1078 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-10-17 10:17:06,660 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 861 flow [2022-10-17 10:17:06,661 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=861, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2022-10-17 10:17:06,662 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2022-10-17 10:17:06,662 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 861 flow [2022-10-17 10:17:06,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.083333333333336) internal successors, (757), 12 states have internal predecessors, (757), 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) [2022-10-17 10:17:06,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:06,663 INFO L208 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:06,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:06,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1750043595, now seen corresponding path program 2 times [2022-10-17 10:17:06,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282736385] [2022-10-17 10:17:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:07,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282736385] [2022-10-17 10:17:07,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282736385] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032201437] [2022-10-17 10:17:07,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:17:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:07,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:07,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:17:07,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:17:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:17:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:17:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:07,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:08,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032201437] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:08,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:17:08,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 8] total 16 [2022-10-17 10:17:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708506666] [2022-10-17 10:17:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:08,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:17:08,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:17:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:17:08,041 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-10-17 10:17:08,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 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) [2022-10-17 10:17:08,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:08,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-10-17 10:17:08,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:08,313 INFO L130 PetriNetUnfolder]: 197/702 cut-off events. [2022-10-17 10:17:08,313 INFO L131 PetriNetUnfolder]: For 3162/3224 co-relation queries the response was YES. [2022-10-17 10:17:08,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2766 conditions, 702 events. 197/702 cut-off events. For 3162/3224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4192 event pairs, 20 based on Foata normal form. 31/726 useless extension candidates. Maximal degree in co-relation 2743. Up to 187 conditions per place. [2022-10-17 10:17:08,325 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 79 selfloop transitions, 18 changer transitions 21/180 dead transitions. [2022-10-17 10:17:08,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 180 transitions, 1497 flow [2022-10-17 10:17:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:17:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:17:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-10-17 10:17:08,328 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-10-17 10:17:08,328 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-10-17 10:17:08,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-10-17 10:17:08,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:08,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-10-17 10:17:08,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 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) [2022-10-17 10:17:08,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2022-10-17 10:17:08,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2022-10-17 10:17:08,333 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 861 flow. Second operand 6 states and 378 transitions. [2022-10-17 10:17:08,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 180 transitions, 1497 flow [2022-10-17 10:17:08,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1489 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:08,360 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1072 flow [2022-10-17 10:17:08,361 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1072, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2022-10-17 10:17:08,364 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 47 predicate places. [2022-10-17 10:17:08,364 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1072 flow [2022-10-17 10:17:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 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) [2022-10-17 10:17:08,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:08,367 INFO L208 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:08,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:08,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:17:08,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1478394585, now seen corresponding path program 3 times [2022-10-17 10:17:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:08,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690101192] [2022-10-17 10:17:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:08,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:09,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690101192] [2022-10-17 10:17:09,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690101192] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:09,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283027035] [2022-10-17 10:17:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:17:09,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:09,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:09,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:09,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:17:09,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 10:17:09,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:17:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:17:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:09,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283027035] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:09,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:09,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-10-17 10:17:09,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932016328] [2022-10-17 10:17:09,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:09,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:17:09,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:09,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:17:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:17:09,770 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-10-17 10:17:09,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1072 flow. Second operand has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 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) [2022-10-17 10:17:09,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:09,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-10-17 10:17:09,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:11,139 INFO L130 PetriNetUnfolder]: 415/1200 cut-off events. [2022-10-17 10:17:11,140 INFO L131 PetriNetUnfolder]: For 6924/6937 co-relation queries the response was YES. [2022-10-17 10:17:11,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5369 conditions, 1200 events. 415/1200 cut-off events. For 6924/6937 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8130 event pairs, 14 based on Foata normal form. 28/1224 useless extension candidates. Maximal degree in co-relation 5341. Up to 242 conditions per place. [2022-10-17 10:17:11,165 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 81 selfloop transitions, 178 changer transitions 18/332 dead transitions. [2022-10-17 10:17:11,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 332 transitions, 3623 flow [2022-10-17 10:17:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-17 10:17:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-10-17 10:17:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-10-17 10:17:11,177 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-10-17 10:17:11,177 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-10-17 10:17:11,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-10-17 10:17:11,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:11,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-10-17 10:17:11,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 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) [2022-10-17 10:17:11,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 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) [2022-10-17 10:17:11,198 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 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) [2022-10-17 10:17:11,198 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1072 flow. Second operand 32 states and 2124 transitions. [2022-10-17 10:17:11,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 332 transitions, 3623 flow [2022-10-17 10:17:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 332 transitions, 3619 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-10-17 10:17:11,281 INFO L231 Difference]: Finished difference. Result has 167 places, 260 transitions, 3149 flow [2022-10-17 10:17:11,282 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3149, PETRI_PLACES=167, PETRI_TRANSITIONS=260} [2022-10-17 10:17:11,284 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 93 predicate places. [2022-10-17 10:17:11,284 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 260 transitions, 3149 flow [2022-10-17 10:17:11,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 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) [2022-10-17 10:17:11,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:11,285 INFO L208 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:11,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:11,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:17:11,504 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -577994853, now seen corresponding path program 4 times [2022-10-17 10:17:11,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:11,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833348746] [2022-10-17 10:17:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833348746] [2022-10-17 10:17:11,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833348746] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905273708] [2022-10-17 10:17:11,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:17:11,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:11,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:11,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:17:12,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:17:12,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:17:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:17:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:12,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:12,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905273708] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:12,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:12,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-10-17 10:17:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32036183] [2022-10-17 10:17:12,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:17:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:17:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:17:12,636 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-10-17 10:17:12,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 260 transitions, 3149 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 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) [2022-10-17 10:17:12,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:12,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-10-17 10:17:12,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:14,055 INFO L130 PetriNetUnfolder]: 501/1369 cut-off events. [2022-10-17 10:17:14,058 INFO L131 PetriNetUnfolder]: For 15393/15406 co-relation queries the response was YES. [2022-10-17 10:17:14,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 1369 events. 501/1369 cut-off events. For 15393/15406 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8945 event pairs, 22 based on Foata normal form. 12/1378 useless extension candidates. Maximal degree in co-relation 8286. Up to 328 conditions per place. [2022-10-17 10:17:14,090 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 117 selfloop transitions, 228 changer transitions 5/405 dead transitions. [2022-10-17 10:17:14,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 405 transitions, 6014 flow [2022-10-17 10:17:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:17:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-10-17 10:17:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-10-17 10:17:14,097 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-10-17 10:17:14,097 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-10-17 10:17:14,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-10-17 10:17:14,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:14,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-10-17 10:17:14,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 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) [2022-10-17 10:17:14,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 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) [2022-10-17 10:17:14,112 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 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) [2022-10-17 10:17:14,112 INFO L175 Difference]: Start difference. First operand has 167 places, 260 transitions, 3149 flow. Second operand 22 states and 1451 transitions. [2022-10-17 10:17:14,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 405 transitions, 6014 flow [2022-10-17 10:17:14,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 405 transitions, 5788 flow, removed 112 selfloop flow, removed 1 redundant places. [2022-10-17 10:17:14,237 INFO L231 Difference]: Finished difference. Result has 198 places, 360 transitions, 5500 flow [2022-10-17 10:17:14,238 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5500, PETRI_PLACES=198, PETRI_TRANSITIONS=360} [2022-10-17 10:17:14,241 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 124 predicate places. [2022-10-17 10:17:14,241 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 360 transitions, 5500 flow [2022-10-17 10:17:14,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 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) [2022-10-17 10:17:14,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:14,243 INFO L208 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:14,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:14,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 841730425, now seen corresponding path program 5 times [2022-10-17 10:17:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423931024] [2022-10-17 10:17:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423931024] [2022-10-17 10:17:14,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423931024] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601645620] [2022-10-17 10:17:14,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:17:14,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:14,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:14,969 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:14,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:17:15,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:17:15,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:17:15,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:17:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:15,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:15,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601645620] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:15,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:15,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-10-17 10:17:15,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648367866] [2022-10-17 10:17:15,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:15,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 10:17:15,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 10:17:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:17:15,929 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-10-17 10:17:15,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 360 transitions, 5500 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 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) [2022-10-17 10:17:15,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:15,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-10-17 10:17:15,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:22,178 INFO L130 PetriNetUnfolder]: 639/1941 cut-off events. [2022-10-17 10:17:22,178 INFO L131 PetriNetUnfolder]: For 28845/28864 co-relation queries the response was YES. [2022-10-17 10:17:22,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12521 conditions, 1941 events. 639/1941 cut-off events. For 28845/28864 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14799 event pairs, 16 based on Foata normal form. 36/1964 useless extension candidates. Maximal degree in co-relation 12464. Up to 407 conditions per place. [2022-10-17 10:17:22,228 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 129 selfloop transitions, 492 changer transitions 2/678 dead transitions. [2022-10-17 10:17:22,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 678 transitions, 11996 flow [2022-10-17 10:17:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-10-17 10:17:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-10-17 10:17:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4684 transitions. [2022-10-17 10:17:22,244 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7744708994708994 [2022-10-17 10:17:22,244 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4684 transitions. [2022-10-17 10:17:22,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4684 transitions. [2022-10-17 10:17:22,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:22,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4684 transitions. [2022-10-17 10:17:22,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 65.05555555555556) internal successors, (4684), 72 states have internal predecessors, (4684), 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) [2022-10-17 10:17:22,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 84.0) internal successors, (6132), 73 states have internal predecessors, (6132), 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) [2022-10-17 10:17:22,292 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 84.0) internal successors, (6132), 73 states have internal predecessors, (6132), 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) [2022-10-17 10:17:22,293 INFO L175 Difference]: Start difference. First operand has 198 places, 360 transitions, 5500 flow. Second operand 72 states and 4684 transitions. [2022-10-17 10:17:22,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 678 transitions, 11996 flow [2022-10-17 10:17:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 678 transitions, 11343 flow, removed 311 selfloop flow, removed 4 redundant places. [2022-10-17 10:17:22,529 INFO L231 Difference]: Finished difference. Result has 267 places, 610 transitions, 10628 flow [2022-10-17 10:17:22,530 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10628, PETRI_PLACES=267, PETRI_TRANSITIONS=610} [2022-10-17 10:17:22,531 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 193 predicate places. [2022-10-17 10:17:22,532 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 610 transitions, 10628 flow [2022-10-17 10:17:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 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) [2022-10-17 10:17:22,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:22,533 INFO L208 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, 1, 1, 1, 1, 1] [2022-10-17 10:17:22,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:22,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:22,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:17:22,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1113448201, now seen corresponding path program 6 times [2022-10-17 10:17:22,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:22,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968861861] [2022-10-17 10:17:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:22,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:23,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968861861] [2022-10-17 10:17:23,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968861861] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291826041] [2022-10-17 10:17:23,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:17:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:23,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b440f0ad-e422-4aef-92fb-02fe07126cd6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:17:23,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-10-17 10:17:23,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:17:23,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:17:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:23,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:23,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291826041] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:23,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:23,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-10-17 10:17:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323758075] [2022-10-17 10:17:23,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:23,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:17:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:23,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:17:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:17:23,940 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-10-17 10:17:23,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 610 transitions, 10628 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 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) [2022-10-17 10:17:23,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:23,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-10-17 10:17:23,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand