./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --- 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-2329fc7 [2022-12-13 12:39:21,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:39:21,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:39:21,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:39:21,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:39:21,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:39:21,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:39:21,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:39:21,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:39:21,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:39:21,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:39:21,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:39:21,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:39:21,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:39:21,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:39:21,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:39:21,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:39:21,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:39:21,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:39:21,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:39:21,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:39:21,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:39:21,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:39:21,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:39:21,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:39:21,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:39:21,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:39:21,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:39:21,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:39:21,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:39:21,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:39:21,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:39:21,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:39:21,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:39:21,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:39:21,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:39:21,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:39:21,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:39:21,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:39:21,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:39:21,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:39:21,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 12:39:21,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:39:21,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:39:21,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:39:21,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:39:21,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:39:21,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:39:21,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:39:21,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:39:21,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:39:21,425 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:39:21,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:39:21,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:39:21,426 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:39:21,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:39:21,427 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:39:21,427 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 [2022-12-13 12:39:21,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:39:21,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:39:21,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:39:21,618 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:39:21,619 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:39:21,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-12-13 12:39:24,248 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:39:24,377 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:39:24,377 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-12-13 12:39:24,383 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/data/4aa67813d/b70854c43ea044f48c9deef5224ccc77/FLAG1779b9414 [2022-12-13 12:39:24,395 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/data/4aa67813d/b70854c43ea044f48c9deef5224ccc77 [2022-12-13 12:39:24,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:39:24,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:39:24,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:39:24,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:39:24,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:39:24,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e678e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24, skipping insertion in model container [2022-12-13 12:39:24,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:39:24,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:39:24,609 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-12-13 12:39:24,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:39:24,629 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:39:24,668 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-12-13 12:39:24,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:39:24,685 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:39:24,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24 WrapperNode [2022-12-13 12:39:24,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:39:24,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:39:24,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:39:24,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:39:24,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,742 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 574 [2022-12-13 12:39:24,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:39:24,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:39:24,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:39:24,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:39:24,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,783 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:39:24,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:39:24,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:39:24,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:39:24,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (1/1) ... [2022-12-13 12:39:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:39:24,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:39:24,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:39:24,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:39:24,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:39:24,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:39:24,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:39:24,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:39:24,861 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:39:24,962 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:39:24,963 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:39:25,642 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:39:25,651 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:39:25,652 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 12:39:25,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:39:25 BoogieIcfgContainer [2022-12-13 12:39:25,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:39:25,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:39:25,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:39:25,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:39:25,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:39:24" (1/3) ... [2022-12-13 12:39:25,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479a8300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:39:25, skipping insertion in model container [2022-12-13 12:39:25,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:39:24" (2/3) ... [2022-12-13 12:39:25,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479a8300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:39:25, skipping insertion in model container [2022-12-13 12:39:25,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:39:25" (3/3) ... [2022-12-13 12:39:25,660 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2022-12-13 12:39:25,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:39:25,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2022-12-13 12:39:25,674 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:39:25,790 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:39:25,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 768 places, 831 transitions, 1686 flow [2022-12-13 12:39:26,115 INFO L130 PetriNetUnfolder]: 73/828 cut-off events. [2022-12-13 12:39:26,115 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:39:26,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 828 events. 73/828 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3195 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 604. Up to 2 conditions per place. [2022-12-13 12:39:26,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 768 places, 831 transitions, 1686 flow [2022-12-13 12:39:26,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 760 places, 823 transitions, 1664 flow [2022-12-13 12:39:26,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:39:26,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 760 places, 823 transitions, 1664 flow [2022-12-13 12:39:26,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 760 places, 823 transitions, 1664 flow [2022-12-13 12:39:26,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 760 places, 823 transitions, 1664 flow [2022-12-13 12:39:26,411 INFO L130 PetriNetUnfolder]: 73/823 cut-off events. [2022-12-13 12:39:26,411 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:39:26,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 823 events. 73/823 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3185 event pairs, 0 based on Foata normal form. 0/683 useless extension candidates. Maximal degree in co-relation 604. Up to 2 conditions per place. [2022-12-13 12:39:26,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 230010 [2022-12-13 12:39:59,126 INFO L134 LiptonReduction]: Checked pairs total: 238817 [2022-12-13 12:39:59,127 INFO L136 LiptonReduction]: Total number of compositions: 1062 [2022-12-13 12:39:59,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:39:59,141 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@66352bf1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:39:59,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2022-12-13 12:39:59,143 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 12:39:59,143 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:39:59,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:39:59,144 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:39:59,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:39:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:39:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash 115071, now seen corresponding path program 1 times [2022-12-13 12:39:59,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:39:59,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172379529] [2022-12-13 12:39:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:39:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:39:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:39:59,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:39:59,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172379529] [2022-12-13 12:39:59,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172379529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:39:59,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:39:59,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:39:59,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161483339] [2022-12-13 12:39:59,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:39:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:39:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:39:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:39:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:39:59,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 766 out of 1893 [2022-12-13 12:39:59,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 118 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 766.6666666666666) internal successors, (2300), 3 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:59,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:39:59,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 766 of 1893 [2022-12-13 12:39:59,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:40:10,816 INFO L130 PetriNetUnfolder]: 79540/105588 cut-off events. [2022-12-13 12:40:10,816 INFO L131 PetriNetUnfolder]: For 1296/1296 co-relation queries the response was YES. [2022-12-13 12:40:10,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212723 conditions, 105588 events. 79540/105588 cut-off events. For 1296/1296 co-relation queries the response was YES. Maximal size of possible extension queue 4378. Compared 636182 event pairs, 64129 based on Foata normal form. 0/30976 useless extension candidates. Maximal degree in co-relation 206160. Up to 105583 conditions per place. [2022-12-13 12:40:11,264 INFO L137 encePairwiseOnDemand]: 1868/1893 looper letters, 105 selfloop transitions, 6 changer transitions 0/111 dead transitions. [2022-12-13 12:40:11,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 111 transitions, 462 flow [2022-12-13 12:40:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:40:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:40:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2430 transitions. [2022-12-13 12:40:11,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42789223454833597 [2022-12-13 12:40:11,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2430 transitions. [2022-12-13 12:40:11,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2430 transitions. [2022-12-13 12:40:11,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:40:11,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2430 transitions. [2022-12-13 12:40:11,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 810.0) internal successors, (2430), 3 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:11,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:11,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:11,321 INFO L175 Difference]: Start difference. First operand has 113 places, 118 transitions, 254 flow. Second operand 3 states and 2430 transitions. [2022-12-13 12:40:11,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 111 transitions, 462 flow [2022-12-13 12:40:11,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 450 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:40:11,373 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 258 flow [2022-12-13 12:40:11,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2022-12-13 12:40:11,378 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -16 predicate places. [2022-12-13 12:40:11,378 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 258 flow [2022-12-13 12:40:11,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 766.6666666666666) internal successors, (2300), 3 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:11,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:40:11,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:40:11,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:40:11,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:40:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:40:11,381 INFO L85 PathProgramCache]: Analyzing trace with hash 115070, now seen corresponding path program 1 times [2022-12-13 12:40:11,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:40:11,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136298895] [2022-12-13 12:40:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:40:11,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:40:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:40:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136298895] [2022-12-13 12:40:11,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136298895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:40:11,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:40:11,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:40:11,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856447992] [2022-12-13 12:40:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:40:11,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:40:11,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:40:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:40:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:40:11,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 772 out of 1893 [2022-12-13 12:40:11,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 772.6666666666666) internal successors, (2318), 3 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:11,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:40:11,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 772 of 1893 [2022-12-13 12:40:11,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:40:21,488 INFO L130 PetriNetUnfolder]: 79540/105582 cut-off events. [2022-12-13 12:40:21,488 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 12:40:21,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211835 conditions, 105582 events. 79540/105582 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 4372. Compared 636759 event pairs, 64129 based on Foata normal form. 6/30984 useless extension candidates. Maximal degree in co-relation 211798. Up to 105582 conditions per place. [2022-12-13 12:40:21,896 INFO L137 encePairwiseOnDemand]: 1889/1893 looper letters, 104 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2022-12-13 12:40:21,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 105 transitions, 462 flow [2022-12-13 12:40:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:40:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:40:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2421 transitions. [2022-12-13 12:40:21,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42630744849445323 [2022-12-13 12:40:21,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2421 transitions. [2022-12-13 12:40:21,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2421 transitions. [2022-12-13 12:40:21,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:40:21,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2421 transitions. [2022-12-13 12:40:21,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 807.0) internal successors, (2421), 3 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:21,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:21,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:21,915 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 258 flow. Second operand 3 states and 2421 transitions. [2022-12-13 12:40:21,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 105 transitions, 462 flow [2022-12-13 12:40:21,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 105 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:40:21,917 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 248 flow [2022-12-13 12:40:21,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2022-12-13 12:40:21,918 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -18 predicate places. [2022-12-13 12:40:21,918 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 248 flow [2022-12-13 12:40:21,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 772.6666666666666) internal successors, (2318), 3 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:21,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:40:21,919 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:40:21,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:40:21,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:40:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:40:21,919 INFO L85 PathProgramCache]: Analyzing trace with hash 3591194, now seen corresponding path program 1 times [2022-12-13 12:40:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:40:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597863387] [2022-12-13 12:40:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:40:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:40:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:40:22,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597863387] [2022-12-13 12:40:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597863387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:40:22,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055088032] [2022-12-13 12:40:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:40:22,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:40:22,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:40:22,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:40:22,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:40:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:40:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:40:22,239 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:40:22,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:40:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:22,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:40:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:22,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055088032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:40:22,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:40:22,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 12:40:22,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533192360] [2022-12-13 12:40:22,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:40:22,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:40:22,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:40:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:40:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:40:23,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 757 out of 1893 [2022-12-13 12:40:23,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 758.125) internal successors, (6065), 8 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:23,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:40:23,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 757 of 1893 [2022-12-13 12:40:23,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:41:01,566 INFO L130 PetriNetUnfolder]: 318157/422307 cut-off events. [2022-12-13 12:41:01,566 INFO L131 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2022-12-13 12:41:01,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847254 conditions, 422307 events. 318157/422307 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 15773. Compared 2955115 event pairs, 256516 based on Foata normal form. 0/123892 useless extension candidates. Maximal degree in co-relation 847246. Up to 105580 conditions per place. [2022-12-13 12:41:03,122 INFO L137 encePairwiseOnDemand]: 1884/1893 looper letters, 378 selfloop transitions, 21 changer transitions 0/399 dead transitions. [2022-12-13 12:41:03,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 399 transitions, 1700 flow [2022-12-13 12:41:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:41:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:41:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4950 transitions. [2022-12-13 12:41:03,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358161648177496 [2022-12-13 12:41:03,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4950 transitions. [2022-12-13 12:41:03,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4950 transitions. [2022-12-13 12:41:03,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:41:03,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4950 transitions. [2022-12-13 12:41:03,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 825.0) internal successors, (4950), 6 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:03,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1893.0) internal successors, (13251), 7 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:03,158 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1893.0) internal successors, (13251), 7 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:03,158 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 248 flow. Second operand 6 states and 4950 transitions. [2022-12-13 12:41:03,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 399 transitions, 1700 flow [2022-12-13 12:41:03,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 399 transitions, 1699 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:41:03,163 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 397 flow [2022-12-13 12:41:03,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2022-12-13 12:41:03,164 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -11 predicate places. [2022-12-13 12:41:03,164 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 397 flow [2022-12-13 12:41:03,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 758.125) internal successors, (6065), 8 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:03,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:41:03,166 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:41:03,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:41:03,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:03,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:41:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash -365096897, now seen corresponding path program 2 times [2022-12-13 12:41:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:03,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432992876] [2022-12-13 12:41:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432992876] [2022-12-13 12:41:03,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432992876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317270633] [2022-12-13 12:41:03,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:41:03,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:03,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:03,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:41:03,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:41:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:41:03,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:03,804 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:41:03,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:41:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:03,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:41:03,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317270633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:41:03,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:41:03,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2022-12-13 12:41:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385400959] [2022-12-13 12:41:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:41:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:41:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:03,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:41:03,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:41:04,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 769 out of 1893 [2022-12-13 12:41:04,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 769.8571428571429) internal successors, (5389), 7 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:04,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:41:04,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 769 of 1893 [2022-12-13 12:41:04,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:41:43,074 INFO L130 PetriNetUnfolder]: 318157/422304 cut-off events. [2022-12-13 12:41:43,074 INFO L131 PetriNetUnfolder]: For 831/831 co-relation queries the response was YES. [2022-12-13 12:41:43,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847287 conditions, 422304 events. 318157/422304 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 15059. Compared 2936405 event pairs, 256516 based on Foata normal form. 3/123903 useless extension candidates. Maximal degree in co-relation 847275. Up to 105576 conditions per place. [2022-12-13 12:41:44,980 INFO L137 encePairwiseOnDemand]: 1884/1893 looper letters, 375 selfloop transitions, 21 changer transitions 0/396 dead transitions. [2022-12-13 12:41:44,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 396 transitions, 1753 flow [2022-12-13 12:41:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:41:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:41:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5782 transitions. [2022-12-13 12:41:44,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4363444268357105 [2022-12-13 12:41:44,990 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5782 transitions. [2022-12-13 12:41:44,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5782 transitions. [2022-12-13 12:41:44,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:41:44,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5782 transitions. [2022-12-13 12:41:44,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 826.0) internal successors, (5782), 7 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:45,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1893.0) internal successors, (15144), 8 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:45,015 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1893.0) internal successors, (15144), 8 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:45,015 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 397 flow. Second operand 7 states and 5782 transitions. [2022-12-13 12:41:45,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 396 transitions, 1753 flow [2022-12-13 12:41:45,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 396 transitions, 1717 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:41:45,020 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 373 flow [2022-12-13 12:41:45,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2022-12-13 12:41:45,021 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -12 predicate places. [2022-12-13 12:41:45,021 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 373 flow [2022-12-13 12:41:45,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 769.8571428571429) internal successors, (5389), 7 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:45,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:41:45,022 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:45,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:41:45,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:45,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:41:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1797285836, now seen corresponding path program 1 times [2022-12-13 12:41:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:45,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50805780] [2022-12-13 12:41:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:45,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:41:45,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:45,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50805780] [2022-12-13 12:41:45,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50805780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:45,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399639954] [2022-12-13 12:41:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:45,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:45,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:45,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:45,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:41:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:45,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:41:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:41:45,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:41:45,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399639954] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:45,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:45,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 12:41:45,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200833470] [2022-12-13 12:41:45,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:45,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:41:45,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:45,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:41:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:41:45,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 769 out of 1893 [2022-12-13 12:41:45,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 373 flow. Second operand has 8 states, 8 states have (on average 770.625) internal successors, (6165), 8 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:45,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:41:45,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 769 of 1893 [2022-12-13 12:41:45,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:41:55,466 INFO L130 PetriNetUnfolder]: 79540/105588 cut-off events. [2022-12-13 12:41:55,467 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 12:41:55,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211882 conditions, 105588 events. 79540/105588 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 4409. Compared 636835 event pairs, 64129 based on Foata normal form. 3/30991 useless extension candidates. Maximal degree in co-relation 211872. Up to 105577 conditions per place. [2022-12-13 12:41:55,883 INFO L137 encePairwiseOnDemand]: 1884/1893 looper letters, 96 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2022-12-13 12:41:55,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 553 flow [2022-12-13 12:41:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:41:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:41:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4740 transitions. [2022-12-13 12:41:55,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173269941891178 [2022-12-13 12:41:55,891 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4740 transitions. [2022-12-13 12:41:55,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4740 transitions. [2022-12-13 12:41:55,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:41:55,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4740 transitions. [2022-12-13 12:41:55,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 790.0) internal successors, (4740), 6 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:55,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1893.0) internal successors, (13251), 7 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:55,910 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1893.0) internal successors, (13251), 7 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:55,910 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 373 flow. Second operand 6 states and 4740 transitions. [2022-12-13 12:41:55,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 553 flow [2022-12-13 12:41:55,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 111 transitions, 510 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-12-13 12:41:55,913 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 354 flow [2022-12-13 12:41:55,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2022-12-13 12:41:55,914 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2022-12-13 12:41:55,914 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 354 flow [2022-12-13 12:41:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 770.625) internal successors, (6165), 8 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:55,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:41:55,916 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2022-12-13 12:41:55,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 12:41:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:56,116 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:41:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1109067761, now seen corresponding path program 2 times [2022-12-13 12:41:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157842899] [2022-12-13 12:41:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 12:41:56,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157842899] [2022-12-13 12:41:56,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157842899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55513985] [2022-12-13 12:41:56,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:41:56,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:56,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:56,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:56,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:41:56,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:41:56,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:41:56,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:41:56,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:41:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:41:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:41:56,365 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 12:41:56,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 12:41:56,379 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 12:41:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 12:41:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:41:56,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 12:41:56,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:41:56,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 12:41:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:41:56,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:41:56,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55513985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:41:56,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:41:56,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 12:41:56,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839412949] [2022-12-13 12:41:56,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:41:56,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:41:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:41:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:41:56,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 779 out of 1893 [2022-12-13 12:41:56,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 780.75) internal successors, (3123), 4 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:56,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:41:56,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 779 of 1893 [2022-12-13 12:41:56,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:42:04,346 INFO L130 PetriNetUnfolder]: 60268/80699 cut-off events. [2022-12-13 12:42:04,346 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 12:42:04,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162115 conditions, 80699 events. 60268/80699 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 3493. Compared 484956 event pairs, 48355 based on Foata normal form. 0/25690 useless extension candidates. Maximal degree in co-relation 162102. Up to 80699 conditions per place. [2022-12-13 12:42:04,734 INFO L137 encePairwiseOnDemand]: 1890/1893 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2022-12-13 12:42:04,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 109 transitions, 560 flow [2022-12-13 12:42:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:42:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:42:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2436 transitions. [2022-12-13 12:42:04,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289487585842578 [2022-12-13 12:42:04,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2436 transitions. [2022-12-13 12:42:04,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2436 transitions. [2022-12-13 12:42:04,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:42:04,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2436 transitions. [2022-12-13 12:42:04,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 812.0) internal successors, (2436), 3 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:04,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:04,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:04,750 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 354 flow. Second operand 3 states and 2436 transitions. [2022-12-13 12:42:04,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 109 transitions, 560 flow [2022-12-13 12:42:04,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 109 transitions, 530 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:42:04,753 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 314 flow [2022-12-13 12:42:04,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2022-12-13 12:42:04,753 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2022-12-13 12:42:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 314 flow [2022-12-13 12:42:04,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 780.75) internal successors, (3123), 4 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:04,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:42:04,755 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2022-12-13 12:42:04,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 12:42:04,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:42:04,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:42:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1109067762, now seen corresponding path program 1 times [2022-12-13 12:42:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598513871] [2022-12-13 12:42:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 12:42:05,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598513871] [2022-12-13 12:42:05,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598513871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:42:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188214345] [2022-12-13 12:42:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:05,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:42:05,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:42:05,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:42:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:42:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:42:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 12:42:05,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:42:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 12:42:05,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188214345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:42:05,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:42:05,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 12:42:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420465723] [2022-12-13 12:42:05,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:42:05,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:42:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:42:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:42:05,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 769 out of 1893 [2022-12-13 12:42:05,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 314 flow. Second operand has 13 states, 13 states have (on average 770.3846153846154) internal successors, (10015), 13 states have internal predecessors, (10015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:05,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:42:05,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 769 of 1893 [2022-12-13 12:42:05,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:42:13,407 INFO L130 PetriNetUnfolder]: 60268/80702 cut-off events. [2022-12-13 12:42:13,407 INFO L131 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-12-13 12:42:13,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162113 conditions, 80702 events. 60268/80702 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 3429. Compared 484351 event pairs, 48355 based on Foata normal form. 3/25696 useless extension candidates. Maximal degree in co-relation 162100. Up to 80688 conditions per place. [2022-12-13 12:42:13,803 INFO L137 encePairwiseOnDemand]: 1885/1893 looper letters, 94 selfloop transitions, 18 changer transitions 0/112 dead transitions. [2022-12-13 12:42:13,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 556 flow [2022-12-13 12:42:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:42:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:42:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5499 transitions. [2022-12-13 12:42:13,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4149875481095766 [2022-12-13 12:42:13,812 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5499 transitions. [2022-12-13 12:42:13,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5499 transitions. [2022-12-13 12:42:13,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:42:13,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5499 transitions. [2022-12-13 12:42:13,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 785.5714285714286) internal successors, (5499), 7 states have internal predecessors, (5499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:13,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1893.0) internal successors, (15144), 8 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:13,828 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1893.0) internal successors, (15144), 8 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:13,828 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 314 flow. Second operand 7 states and 5499 transitions. [2022-12-13 12:42:13,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 556 flow [2022-12-13 12:42:13,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 112 transitions, 555 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:42:13,831 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 383 flow [2022-12-13 12:42:13,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2022-12-13 12:42:13,832 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -8 predicate places. [2022-12-13 12:42:13,832 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 383 flow [2022-12-13 12:42:13,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 770.3846153846154) internal successors, (10015), 13 states have internal predecessors, (10015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:13,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:42:13,833 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-12-13 12:42:13,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:42:14,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 12:42:14,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:42:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1829617421, now seen corresponding path program 2 times [2022-12-13 12:42:14,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:14,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763653823] [2022-12-13 12:42:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:14,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:42:14,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:14,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763653823] [2022-12-13 12:42:14,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763653823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:42:14,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:42:14,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:42:14,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552663254] [2022-12-13 12:42:14,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:42:14,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:42:14,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:42:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:42:14,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 765 out of 1893 [2022-12-13 12:42:14,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 766.3333333333334) internal successors, (4598), 6 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:14,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:42:14,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 765 of 1893 [2022-12-13 12:42:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:42:20,416 INFO L130 PetriNetUnfolder]: 40996/55813 cut-off events. [2022-12-13 12:42:20,416 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 12:42:20,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112357 conditions, 55813 events. 40996/55813 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 2436. Compared 333937 event pairs, 32581 based on Foata normal form. 0/20395 useless extension candidates. Maximal degree in co-relation 112342. Up to 55813 conditions per place. [2022-12-13 12:42:20,692 INFO L137 encePairwiseOnDemand]: 1890/1893 looper letters, 109 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2022-12-13 12:42:20,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 110 transitions, 589 flow [2022-12-13 12:42:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:42:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:42:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2392 transitions. [2022-12-13 12:42:20,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42120091565416445 [2022-12-13 12:42:20,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2392 transitions. [2022-12-13 12:42:20,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2392 transitions. [2022-12-13 12:42:20,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:42:20,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2392 transitions. [2022-12-13 12:42:20,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:20,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:20,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:20,704 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 383 flow. Second operand 3 states and 2392 transitions. [2022-12-13 12:42:20,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 110 transitions, 589 flow [2022-12-13 12:42:20,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 553 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 12:42:20,706 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 335 flow [2022-12-13 12:42:20,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=335, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2022-12-13 12:42:20,707 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -12 predicate places. [2022-12-13 12:42:20,707 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 335 flow [2022-12-13 12:42:20,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 766.3333333333334) internal successors, (4598), 6 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:20,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:42:20,708 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 12:42:20,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 12:42:20,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:42:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1620800112, now seen corresponding path program 1 times [2022-12-13 12:42:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734243216] [2022-12-13 12:42:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:42:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734243216] [2022-12-13 12:42:20,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734243216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:42:20,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:42:20,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:42:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25169899] [2022-12-13 12:42:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:42:20,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:42:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:42:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:42:21,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 765 out of 1893 [2022-12-13 12:42:21,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 766.6666666666666) internal successors, (4600), 6 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:21,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:42:21,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 765 of 1893 [2022-12-13 12:42:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:42:26,903 INFO L130 PetriNetUnfolder]: 40438/54997 cut-off events. [2022-12-13 12:42:26,904 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-12-13 12:42:27,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110709 conditions, 54997 events. 40438/54997 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 2318. Compared 326577 event pairs, 32125 based on Foata normal form. 0/20253 useless extension candidates. Maximal degree in co-relation 110693. Up to 54997 conditions per place. [2022-12-13 12:42:27,168 INFO L137 encePairwiseOnDemand]: 1890/1893 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2022-12-13 12:42:27,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 108 transitions, 547 flow [2022-12-13 12:42:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:42:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:42:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2390 transitions. [2022-12-13 12:42:27,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4208487409755239 [2022-12-13 12:42:27,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2390 transitions. [2022-12-13 12:42:27,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2390 transitions. [2022-12-13 12:42:27,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:42:27,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2390 transitions. [2022-12-13 12:42:27,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 796.6666666666666) internal successors, (2390), 3 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:27,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:27,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:27,179 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 335 flow. Second operand 3 states and 2390 transitions. [2022-12-13 12:42:27,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 108 transitions, 547 flow [2022-12-13 12:42:27,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:42:27,181 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 332 flow [2022-12-13 12:42:27,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2022-12-13 12:42:27,182 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2022-12-13 12:42:27,182 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 332 flow [2022-12-13 12:42:27,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 766.6666666666666) internal successors, (4600), 6 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:27,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:42:27,182 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 12:42:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 12:42:27,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:42:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1620800113, now seen corresponding path program 1 times [2022-12-13 12:42:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:27,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381459660] [2022-12-13 12:42:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:42:27,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:27,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381459660] [2022-12-13 12:42:27,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381459660] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:42:27,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896376642] [2022-12-13 12:42:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:27,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:27,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:42:27,662 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:42:27,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:42:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:42:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:42:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:27,837 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 12:42:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-13 12:42:27,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-12-13 12:42:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:27,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 12:42:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 12:42:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:42:27,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:42:27,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896376642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:42:27,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:42:27,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-13 12:42:27,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93885082] [2022-12-13 12:42:27,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:42:27,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:42:27,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:42:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:42:28,139 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 779 out of 1893 [2022-12-13 12:42:28,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 781.25) internal successors, (3125), 4 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:28,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:42:28,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 779 of 1893 [2022-12-13 12:42:28,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:42:33,526 INFO L130 PetriNetUnfolder]: 39880/54181 cut-off events. [2022-12-13 12:42:33,526 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-12-13 12:42:33,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109078 conditions, 54181 events. 39880/54181 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 2336. Compared 321056 event pairs, 31669 based on Foata normal form. 0/20111 useless extension candidates. Maximal degree in co-relation 109061. Up to 54181 conditions per place. [2022-12-13 12:42:33,849 INFO L137 encePairwiseOnDemand]: 1890/1893 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2022-12-13 12:42:33,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 540 flow [2022-12-13 12:42:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:42:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:42:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2430 transitions. [2022-12-13 12:42:33,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42789223454833597 [2022-12-13 12:42:33,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2430 transitions. [2022-12-13 12:42:33,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2430 transitions. [2022-12-13 12:42:33,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:42:33,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2430 transitions. [2022-12-13 12:42:33,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 810.0) internal successors, (2430), 3 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:33,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:33,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:33,861 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 332 flow. Second operand 3 states and 2430 transitions. [2022-12-13 12:42:33,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 540 flow [2022-12-13 12:42:33,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:42:33,863 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 329 flow [2022-12-13 12:42:33,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2022-12-13 12:42:33,864 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2022-12-13 12:42:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 329 flow [2022-12-13 12:42:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 781.25) internal successors, (3125), 4 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:33,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:42:33,864 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:42:33,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:42:34,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:34,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:42:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1294794782, now seen corresponding path program 1 times [2022-12-13 12:42:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:34,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741736014] [2022-12-13 12:42:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:42:34,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741736014] [2022-12-13 12:42:34,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741736014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:42:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369628180] [2022-12-13 12:42:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:34,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:34,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:42:34,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:42:34,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:42:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:42:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:42:34,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:42:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:34,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:42:34,719 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:42:34,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 12:42:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:42:34,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:42:40,881 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:42:40,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-12-13 12:42:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:42:41,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369628180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:42:41,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:42:41,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2022-12-13 12:42:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650411607] [2022-12-13 12:42:41,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:42:41,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:42:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:42:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:42:44,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 740 out of 1893 [2022-12-13 12:42:44,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 329 flow. Second operand has 23 states, 23 states have (on average 741.5652173913044) internal successors, (17056), 23 states have internal predecessors, (17056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:44,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:42:44,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 740 of 1893 [2022-12-13 12:42:44,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:42:59,509 INFO L130 PetriNetUnfolder]: 103284/140409 cut-off events. [2022-12-13 12:42:59,509 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-12-13 12:42:59,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282561 conditions, 140409 events. 103284/140409 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 2543. Compared 902608 event pairs, 31669 based on Foata normal form. 0/53239 useless extension candidates. Maximal degree in co-relation 282543. Up to 52441 conditions per place. [2022-12-13 12:43:00,348 INFO L137 encePairwiseOnDemand]: 1878/1893 looper letters, 239 selfloop transitions, 21 changer transitions 0/260 dead transitions. [2022-12-13 12:43:00,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 260 transitions, 1167 flow [2022-12-13 12:43:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:43:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:43:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 10625 transitions. [2022-12-13 12:43:00,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4009131386310467 [2022-12-13 12:43:00,361 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 10625 transitions. [2022-12-13 12:43:00,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 10625 transitions. [2022-12-13 12:43:00,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:00,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 10625 transitions. [2022-12-13 12:43:00,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 758.9285714285714) internal successors, (10625), 14 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:00,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1893.0) internal successors, (28395), 15 states have internal predecessors, (28395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:00,391 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1893.0) internal successors, (28395), 15 states have internal predecessors, (28395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:00,391 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 329 flow. Second operand 14 states and 10625 transitions. [2022-12-13 12:43:00,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 260 transitions, 1167 flow [2022-12-13 12:43:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 260 transitions, 1166 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:43:00,394 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 417 flow [2022-12-13 12:43:00,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=417, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2022-12-13 12:43:00,395 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, 1 predicate places. [2022-12-13 12:43:00,395 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 417 flow [2022-12-13 12:43:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 741.5652173913044) internal successors, (17056), 23 states have internal predecessors, (17056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:00,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:43:00,397 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:43:00,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 12:43:00,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:43:00,599 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:43:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:43:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1294794781, now seen corresponding path program 1 times [2022-12-13 12:43:00,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:43:00,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550199522] [2022-12-13 12:43:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:43:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:43:00,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:43:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550199522] [2022-12-13 12:43:00,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550199522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:43:00,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:43:00,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:43:00,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538373015] [2022-12-13 12:43:00,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:43:00,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:43:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:43:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:43:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:43:01,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 754 out of 1893 [2022-12-13 12:43:01,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 417 flow. Second operand has 5 states, 5 states have (on average 756.2) internal successors, (3781), 5 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:01,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:43:01,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 754 of 1893 [2022-12-13 12:43:01,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:43:12,046 INFO L130 PetriNetUnfolder]: 72708/98329 cut-off events. [2022-12-13 12:43:12,046 INFO L131 PetriNetUnfolder]: For 9942/9942 co-relation queries the response was YES. [2022-12-13 12:43:12,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211017 conditions, 98329 events. 72708/98329 cut-off events. For 9942/9942 co-relation queries the response was YES. Maximal size of possible extension queue 1870. Compared 601965 event pairs, 56901 based on Foata normal form. 1458/44583 useless extension candidates. Maximal degree in co-relation 210995. Up to 98315 conditions per place. [2022-12-13 12:43:12,674 INFO L137 encePairwiseOnDemand]: 1883/1893 looper letters, 101 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2022-12-13 12:43:12,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 103 transitions, 607 flow [2022-12-13 12:43:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:43:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:43:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 3107 transitions. [2022-12-13 12:43:12,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41032752245113574 [2022-12-13 12:43:12,679 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 3107 transitions. [2022-12-13 12:43:12,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 3107 transitions. [2022-12-13 12:43:12,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:12,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 3107 transitions. [2022-12-13 12:43:12,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 776.75) internal successors, (3107), 4 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:12,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1893.0) internal successors, (9465), 5 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:12,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1893.0) internal successors, (9465), 5 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:12,688 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 417 flow. Second operand 4 states and 3107 transitions. [2022-12-13 12:43:12,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 103 transitions, 607 flow [2022-12-13 12:43:12,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 103 transitions, 569 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-12-13 12:43:12,696 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 367 flow [2022-12-13 12:43:12,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2022-12-13 12:43:12,696 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -10 predicate places. [2022-12-13 12:43:12,696 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 367 flow [2022-12-13 12:43:12,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 756.2) internal successors, (3781), 5 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:12,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:43:12,697 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:43:12,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 12:43:12,697 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:43:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:43:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1294794784, now seen corresponding path program 1 times [2022-12-13 12:43:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:43:12,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334424079] [2022-12-13 12:43:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:12,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:43:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 12:43:12,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:43:12,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334424079] [2022-12-13 12:43:12,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334424079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:43:12,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:43:12,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:43:12,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895263625] [2022-12-13 12:43:12,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:43:12,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:43:12,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:43:12,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:43:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:43:13,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 754 out of 1893 [2022-12-13 12:43:13,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 367 flow. Second operand has 5 states, 5 states have (on average 756.4) internal successors, (3782), 5 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:13,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:43:13,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 754 of 1893 [2022-12-13 12:43:13,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:43:21,432 INFO L130 PetriNetUnfolder]: 55430/74729 cut-off events. [2022-12-13 12:43:21,433 INFO L131 PetriNetUnfolder]: For 8949/8949 co-relation queries the response was YES. [2022-12-13 12:43:21,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162405 conditions, 74729 events. 55430/74729 cut-off events. For 8949/8949 co-relation queries the response was YES. Maximal size of possible extension queue 1401. Compared 435190 event pairs, 42329 based on Foata normal form. 0/35203 useless extension candidates. Maximal degree in co-relation 162383. Up to 74722 conditions per place. [2022-12-13 12:43:21,874 INFO L137 encePairwiseOnDemand]: 1887/1893 looper letters, 97 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2022-12-13 12:43:21,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 557 flow [2022-12-13 12:43:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:43:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:43:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 3099 transitions. [2022-12-13 12:43:21,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40927099841521397 [2022-12-13 12:43:21,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 3099 transitions. [2022-12-13 12:43:21,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 3099 transitions. [2022-12-13 12:43:21,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:21,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 3099 transitions. [2022-12-13 12:43:21,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 774.75) internal successors, (3099), 4 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:21,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1893.0) internal successors, (9465), 5 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:21,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1893.0) internal successors, (9465), 5 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:21,889 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 367 flow. Second operand 4 states and 3099 transitions. [2022-12-13 12:43:21,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 557 flow [2022-12-13 12:43:21,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 554 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:43:21,895 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 360 flow [2022-12-13 12:43:21,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2022-12-13 12:43:21,896 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2022-12-13 12:43:21,896 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 360 flow [2022-12-13 12:43:21,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 756.4) internal successors, (3782), 5 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:21,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:43:21,897 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:43:21,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 12:43:21,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:43:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:43:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1294794783, now seen corresponding path program 1 times [2022-12-13 12:43:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:43:21,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262742034] [2022-12-13 12:43:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:43:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:43:22,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:43:22,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262742034] [2022-12-13 12:43:22,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262742034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:43:22,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42791671] [2022-12-13 12:43:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:22,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:43:22,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:43:22,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:43:22,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:43:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:43:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:43:22,481 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:43:22,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:43:22,520 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:43:22,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:43:22,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:43:22,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 12:43:22,689 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:43:22,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 12:43:22,743 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 12:43:22,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 12:43:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:43:22,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:43:29,016 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:43:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:43:29,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42791671] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:43:29,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:43:29,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 25 [2022-12-13 12:43:29,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103957005] [2022-12-13 12:43:29,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:43:29,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:43:29,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:43:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:43:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:43:32,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 749 out of 1893 [2022-12-13 12:43:32,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 360 flow. Second operand has 11 states, 11 states have (on average 750.2727272727273) internal successors, (8253), 11 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:32,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:43:32,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 749 of 1893 [2022-12-13 12:43:32,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:43:40,248 INFO L130 PetriNetUnfolder]: 47156/63361 cut-off events. [2022-12-13 12:43:40,248 INFO L131 PetriNetUnfolder]: For 5439/5439 co-relation queries the response was YES. [2022-12-13 12:43:40,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139509 conditions, 63361 events. 47156/63361 cut-off events. For 5439/5439 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 367784 event pairs, 7861 based on Foata normal form. 0/31773 useless extension candidates. Maximal degree in co-relation 139487. Up to 49060 conditions per place. [2022-12-13 12:43:40,647 INFO L137 encePairwiseOnDemand]: 1883/1893 looper letters, 141 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2022-12-13 12:43:40,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 150 transitions, 767 flow [2022-12-13 12:43:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:43:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:43:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3878 transitions. [2022-12-13 12:43:40,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4097200211304807 [2022-12-13 12:43:40,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3878 transitions. [2022-12-13 12:43:40,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3878 transitions. [2022-12-13 12:43:40,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:40,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3878 transitions. [2022-12-13 12:43:40,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 775.6) internal successors, (3878), 5 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:40,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1893.0) internal successors, (11358), 6 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:40,663 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1893.0) internal successors, (11358), 6 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:40,663 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 360 flow. Second operand 5 states and 3878 transitions. [2022-12-13 12:43:40,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 150 transitions, 767 flow [2022-12-13 12:43:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 764 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:43:40,737 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 396 flow [2022-12-13 12:43:40,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2022-12-13 12:43:40,737 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -11 predicate places. [2022-12-13 12:43:40,737 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 396 flow [2022-12-13 12:43:40,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 750.2727272727273) internal successors, (8253), 11 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:40,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:43:40,738 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:43:40,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:43:40,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:43:40,940 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:43:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:43:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1484137214, now seen corresponding path program 1 times [2022-12-13 12:43:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:43:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405564204] [2022-12-13 12:43:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:43:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:43:41,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:43:41,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405564204] [2022-12-13 12:43:41,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405564204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:43:41,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752337222] [2022-12-13 12:43:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:41,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:43:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:43:41,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:43:41,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:43:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:43:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:43:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:43:41,421 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 12:43:41,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 12:43:41,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:43:41,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 12:43:41,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:43:41,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 12:43:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:43:41,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:43:41,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752337222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:43:41,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:43:41,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-13 12:43:41,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973964510] [2022-12-13 12:43:41,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:43:41,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:43:41,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:43:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:43:41,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:43:41,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 779 out of 1893 [2022-12-13 12:43:41,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 396 flow. Second operand has 4 states, 4 states have (on average 781.75) internal successors, (3127), 4 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:41,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:43:41,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 779 of 1893 [2022-12-13 12:43:41,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:43:48,795 INFO L130 PetriNetUnfolder]: 45277/60710 cut-off events. [2022-12-13 12:43:48,795 INFO L131 PetriNetUnfolder]: For 18666/18666 co-relation queries the response was YES. [2022-12-13 12:43:49,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142856 conditions, 60710 events. 45277/60710 cut-off events. For 18666/18666 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 336210 event pairs, 33910 based on Foata normal form. 0/32901 useless extension candidates. Maximal degree in co-relation 142832. Up to 60710 conditions per place. [2022-12-13 12:43:49,211 INFO L137 encePairwiseOnDemand]: 1890/1893 looper letters, 96 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2022-12-13 12:43:49,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 586 flow [2022-12-13 12:43:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:43:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:43:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2414 transitions. [2022-12-13 12:43:49,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4250748371192111 [2022-12-13 12:43:49,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2414 transitions. [2022-12-13 12:43:49,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2414 transitions. [2022-12-13 12:43:49,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:49,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2414 transitions. [2022-12-13 12:43:49,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 804.6666666666666) internal successors, (2414), 3 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:49,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:49,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:49,222 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 396 flow. Second operand 3 states and 2414 transitions. [2022-12-13 12:43:49,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 586 flow [2022-12-13 12:43:49,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 574 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 12:43:49,255 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 382 flow [2022-12-13 12:43:49,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2022-12-13 12:43:49,255 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2022-12-13 12:43:49,255 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 382 flow [2022-12-13 12:43:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 781.75) internal successors, (3127), 4 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:49,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:43:49,256 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:43:49,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:43:49,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:43:49,458 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:43:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:43:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1484137212, now seen corresponding path program 1 times [2022-12-13 12:43:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:43:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820409852] [2022-12-13 12:43:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:49,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:43:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:43:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:43:49,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820409852] [2022-12-13 12:43:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820409852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:43:49,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:43:49,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:43:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543279408] [2022-12-13 12:43:49,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:43:49,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:43:49,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:43:49,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:43:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:43:50,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 765 out of 1893 [2022-12-13 12:43:50,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 767.0) internal successors, (4602), 6 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:50,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:43:50,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 765 of 1893 [2022-12-13 12:43:50,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:43:57,137 INFO L130 PetriNetUnfolder]: 43398/58059 cut-off events. [2022-12-13 12:43:57,137 INFO L131 PetriNetUnfolder]: For 14102/14102 co-relation queries the response was YES. [2022-12-13 12:43:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133690 conditions, 58059 events. 43398/58059 cut-off events. For 14102/14102 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 319841 event pairs, 32449 based on Foata normal form. 0/31819 useless extension candidates. Maximal degree in co-relation 133666. Up to 58059 conditions per place. [2022-12-13 12:43:57,499 INFO L137 encePairwiseOnDemand]: 1890/1893 looper letters, 94 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2022-12-13 12:43:57,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 568 flow [2022-12-13 12:43:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:43:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:43:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2370 transitions. [2022-12-13 12:43:57,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173269941891178 [2022-12-13 12:43:57,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2370 transitions. [2022-12-13 12:43:57,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2370 transitions. [2022-12-13 12:43:57,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:57,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2370 transitions. [2022-12-13 12:43:57,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:57,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:57,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:57,510 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 382 flow. Second operand 3 states and 2370 transitions. [2022-12-13 12:43:57,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 568 flow [2022-12-13 12:43:57,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 567 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:43:57,521 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 379 flow [2022-12-13 12:43:57,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=379, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2022-12-13 12:43:57,521 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -15 predicate places. [2022-12-13 12:43:57,521 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 379 flow [2022-12-13 12:43:57,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 767.0) internal successors, (4602), 6 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:57,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:43:57,522 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:43:57,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 12:43:57,522 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:43:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:43:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1236396338, now seen corresponding path program 1 times [2022-12-13 12:43:57,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:43:57,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980391947] [2022-12-13 12:43:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:57,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:43:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:43:57,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:43:57,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980391947] [2022-12-13 12:43:57,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980391947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:43:57,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836835952] [2022-12-13 12:43:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:43:57,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:43:57,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:43:57,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:43:57,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:43:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:43:57,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 12:43:57,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:43:57,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:43:58,010 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 12:43:58,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 12:43:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 12:43:58,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:43:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:43:58,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836835952] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:43:58,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:43:58,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 14] total 27 [2022-12-13 12:43:58,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610927000] [2022-12-13 12:43:58,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:43:58,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:43:58,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:43:58,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:43:58,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-12-13 12:43:59,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 752 out of 1893 [2022-12-13 12:43:59,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 379 flow. Second operand has 10 states, 10 states have (on average 753.6) internal successors, (7536), 10 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:59,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:43:59,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 752 of 1893 [2022-12-13 12:43:59,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:44:06,808 INFO L130 PetriNetUnfolder]: 43586/57641 cut-off events. [2022-12-13 12:44:06,808 INFO L131 PetriNetUnfolder]: For 22546/22546 co-relation queries the response was YES. [2022-12-13 12:44:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132065 conditions, 57641 events. 43586/57641 cut-off events. For 22546/22546 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 312392 event pairs, 5449 based on Foata normal form. 0/31379 useless extension candidates. Maximal degree in co-relation 132040. Up to 47330 conditions per place. [2022-12-13 12:44:07,146 INFO L137 encePairwiseOnDemand]: 1881/1893 looper letters, 133 selfloop transitions, 8 changer transitions 0/141 dead transitions. [2022-12-13 12:44:07,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 830 flow [2022-12-13 12:44:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:44:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:44:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3876 transitions. [2022-12-13 12:44:07,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40950871632329633 [2022-12-13 12:44:07,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3876 transitions. [2022-12-13 12:44:07,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3876 transitions. [2022-12-13 12:44:07,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:44:07,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3876 transitions. [2022-12-13 12:44:07,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 775.2) internal successors, (3876), 5 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:07,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1893.0) internal successors, (11358), 6 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:07,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1893.0) internal successors, (11358), 6 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:07,161 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 379 flow. Second operand 5 states and 3876 transitions. [2022-12-13 12:44:07,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 830 flow [2022-12-13 12:44:07,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 141 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:44:07,172 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 419 flow [2022-12-13 12:44:07,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-12-13 12:44:07,172 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2022-12-13 12:44:07,172 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 419 flow [2022-12-13 12:44:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 753.6) internal successors, (7536), 10 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:07,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:44:07,173 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:07,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 12:44:07,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:44:07,375 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:44:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1236396341, now seen corresponding path program 1 times [2022-12-13 12:44:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:07,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889526267] [2022-12-13 12:44:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:44:07,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889526267] [2022-12-13 12:44:07,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889526267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:07,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:07,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:44:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815663647] [2022-12-13 12:44:07,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:07,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:44:07,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:44:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:44:07,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 754 out of 1893 [2022-12-13 12:44:07,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 757.25) internal successors, (3029), 4 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:07,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:44:07,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 754 of 1893 [2022-12-13 12:44:07,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:44:12,432 INFO L130 PetriNetUnfolder]: 27762/36637 cut-off events. [2022-12-13 12:44:12,432 INFO L131 PetriNetUnfolder]: For 12154/12154 co-relation queries the response was YES. [2022-12-13 12:44:12,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91213 conditions, 36637 events. 27762/36637 cut-off events. For 12154/12154 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 180526 event pairs, 18995 based on Foata normal form. 0/24031 useless extension candidates. Maximal degree in co-relation 91185. Up to 36616 conditions per place. [2022-12-13 12:44:12,633 INFO L137 encePairwiseOnDemand]: 1885/1893 looper letters, 87 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-13 12:44:12,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 577 flow [2022-12-13 12:44:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:44:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:44:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 3086 transitions. [2022-12-13 12:44:12,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.407554146856841 [2022-12-13 12:44:12,636 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 3086 transitions. [2022-12-13 12:44:12,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 3086 transitions. [2022-12-13 12:44:12,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:44:12,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 3086 transitions. [2022-12-13 12:44:12,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 771.5) internal successors, (3086), 4 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:12,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1893.0) internal successors, (9465), 5 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:12,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1893.0) internal successors, (9465), 5 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:12,644 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 419 flow. Second operand 4 states and 3086 transitions. [2022-12-13 12:44:12,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 577 flow [2022-12-13 12:44:12,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 569 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 12:44:12,675 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 395 flow [2022-12-13 12:44:12,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2022-12-13 12:44:12,675 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -19 predicate places. [2022-12-13 12:44:12,675 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 395 flow [2022-12-13 12:44:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 757.25) internal successors, (3029), 4 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:12,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:44:12,676 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 12:44:12,676 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:44:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1236396339, now seen corresponding path program 1 times [2022-12-13 12:44:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248773211] [2022-12-13 12:44:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:44:12,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:12,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248773211] [2022-12-13 12:44:12,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248773211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:44:12,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172374083] [2022-12-13 12:44:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:12,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:12,837 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:12,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:44:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:12,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:44:12,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:44:13,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:44:13,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 12:44:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:44:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172374083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:44:13,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:44:13,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2022-12-13 12:44:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186256327] [2022-12-13 12:44:13,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:44:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:44:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:44:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:44:15,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 746 out of 1893 [2022-12-13 12:44:15,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 395 flow. Second operand has 21 states, 21 states have (on average 747.7619047619048) internal successors, (15703), 21 states have internal predecessors, (15703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:15,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:44:15,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 746 of 1893 [2022-12-13 12:44:15,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:44:25,203 INFO L130 PetriNetUnfolder]: 54366/71987 cut-off events. [2022-12-13 12:44:25,203 INFO L131 PetriNetUnfolder]: For 33233/33233 co-relation queries the response was YES. [2022-12-13 12:44:25,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173512 conditions, 71987 events. 54366/71987 cut-off events. For 33233/33233 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 376085 event pairs, 16685 based on Foata normal form. 1024/49895 useless extension candidates. Maximal degree in co-relation 173484. Up to 30064 conditions per place. [2022-12-13 12:44:25,685 INFO L137 encePairwiseOnDemand]: 1877/1893 looper letters, 173 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2022-12-13 12:44:25,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 195 transitions, 1163 flow [2022-12-13 12:44:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:44:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:44:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 7639 transitions. [2022-12-13 12:44:25,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4035393555203381 [2022-12-13 12:44:25,692 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 7639 transitions. [2022-12-13 12:44:25,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 7639 transitions. [2022-12-13 12:44:25,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:44:25,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 7639 transitions. [2022-12-13 12:44:25,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 763.9) internal successors, (7639), 10 states have internal predecessors, (7639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:25,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1893.0) internal successors, (20823), 11 states have internal predecessors, (20823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:25,710 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1893.0) internal successors, (20823), 11 states have internal predecessors, (20823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:25,710 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 395 flow. Second operand 10 states and 7639 transitions. [2022-12-13 12:44:25,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 195 transitions, 1163 flow [2022-12-13 12:44:25,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 195 transitions, 1160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:44:25,728 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 483 flow [2022-12-13 12:44:25,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=483, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2022-12-13 12:44:25,728 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2022-12-13 12:44:25,728 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 483 flow [2022-12-13 12:44:25,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 747.7619047619048) internal successors, (15703), 21 states have internal predecessors, (15703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:25,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:44:25,730 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:25,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:44:25,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:25,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:44:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1535827570, now seen corresponding path program 1 times [2022-12-13 12:44:25,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:25,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690372291] [2022-12-13 12:44:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:44:26,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:26,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690372291] [2022-12-13 12:44:26,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690372291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:44:26,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230153157] [2022-12-13 12:44:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:26,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:26,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:26,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:26,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:44:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:44:26,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:26,496 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:44:26,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:44:26,599 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 12:44:26,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 12:44:26,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:44:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:44:26,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:44:26,644 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:44:26,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 12:44:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:44:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:44:32,809 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:44:35,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 93 [2022-12-13 12:44:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:44:35,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230153157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:44:35,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:44:35,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-12-13 12:44:35,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895772497] [2022-12-13 12:44:35,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:44:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 12:44:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 12:44:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-12-13 12:44:38,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:44:56,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 719 out of 1893 [2022-12-13 12:44:56,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 483 flow. Second operand has 28 states, 28 states have (on average 720.8928571428571) internal successors, (20185), 28 states have internal predecessors, (20185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:56,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:44:56,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 719 of 1893 [2022-12-13 12:44:56,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:45:12,495 INFO L130 PetriNetUnfolder]: 82336/110129 cut-off events. [2022-12-13 12:45:12,495 INFO L131 PetriNetUnfolder]: For 90210/90210 co-relation queries the response was YES. [2022-12-13 12:45:13,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286982 conditions, 110129 events. 82336/110129 cut-off events. For 90210/90210 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 643356 event pairs, 14149 based on Foata normal form. 0/78369 useless extension candidates. Maximal degree in co-relation 286951. Up to 43192 conditions per place. [2022-12-13 12:45:13,367 INFO L137 encePairwiseOnDemand]: 1884/1893 looper letters, 197 selfloop transitions, 17 changer transitions 0/214 dead transitions. [2022-12-13 12:45:13,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 214 transitions, 1451 flow [2022-12-13 12:45:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:45:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:45:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 10237 transitions. [2022-12-13 12:45:13,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38627273413327295 [2022-12-13 12:45:13,377 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 10237 transitions. [2022-12-13 12:45:13,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 10237 transitions. [2022-12-13 12:45:13,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:45:13,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 10237 transitions. [2022-12-13 12:45:13,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 731.2142857142857) internal successors, (10237), 14 states have internal predecessors, (10237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:13,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1893.0) internal successors, (28395), 15 states have internal predecessors, (28395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:13,400 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1893.0) internal successors, (28395), 15 states have internal predecessors, (28395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:13,401 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 483 flow. Second operand 14 states and 10237 transitions. [2022-12-13 12:45:13,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 214 transitions, 1451 flow [2022-12-13 12:45:13,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 214 transitions, 1402 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-12-13 12:45:13,447 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 472 flow [2022-12-13 12:45:13,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=472, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2022-12-13 12:45:13,448 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, -4 predicate places. [2022-12-13 12:45:13,448 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 472 flow [2022-12-13 12:45:13,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 720.8928571428571) internal successors, (20185), 28 states have internal predecessors, (20185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:13,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:45:13,450 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:45:13,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:45:13,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:13,652 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:45:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1535827490, now seen corresponding path program 1 times [2022-12-13 12:45:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:13,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880130768] [2022-12-13 12:45:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:45:13,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880130768] [2022-12-13 12:45:13,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880130768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:45:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690963456] [2022-12-13 12:45:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:13,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:13,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:13,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:45:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:45:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:45:14,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:45:14,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 12:45:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:45:14,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690963456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:45:14,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:45:14,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2022-12-13 12:45:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774269579] [2022-12-13 12:45:14,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:45:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:45:14,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:45:14,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:45:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:45:16,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 746 out of 1893 [2022-12-13 12:45:16,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 472 flow. Second operand has 21 states, 21 states have (on average 748.047619047619) internal successors, (15709), 21 states have internal predecessors, (15709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:16,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:45:16,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 746 of 1893 [2022-12-13 12:45:16,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:45:33,313 INFO L130 PetriNetUnfolder]: 82336/110147 cut-off events. [2022-12-13 12:45:33,313 INFO L131 PetriNetUnfolder]: For 87667/87667 co-relation queries the response was YES. [2022-12-13 12:45:33,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299677 conditions, 110147 events. 82336/110147 cut-off events. For 87667/87667 co-relation queries the response was YES. Maximal size of possible extension queue 1676. Compared 640628 event pairs, 38405 based on Foata normal form. 0/91057 useless extension candidates. Maximal degree in co-relation 299648. Up to 69450 conditions per place. [2022-12-13 12:45:34,153 INFO L137 encePairwiseOnDemand]: 1882/1893 looper letters, 195 selfloop transitions, 19 changer transitions 0/214 dead transitions. [2022-12-13 12:45:34,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 214 transitions, 1442 flow [2022-12-13 12:45:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:45:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:45:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 7633 transitions. [2022-12-13 12:45:34,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4032223983095615 [2022-12-13 12:45:34,160 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 7633 transitions. [2022-12-13 12:45:34,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 7633 transitions. [2022-12-13 12:45:34,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:45:34,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 7633 transitions. [2022-12-13 12:45:34,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 763.3) internal successors, (7633), 10 states have internal predecessors, (7633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:34,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1893.0) internal successors, (20823), 11 states have internal predecessors, (20823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:34,178 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1893.0) internal successors, (20823), 11 states have internal predecessors, (20823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:34,178 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 472 flow. Second operand 10 states and 7633 transitions. [2022-12-13 12:45:34,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 214 transitions, 1442 flow [2022-12-13 12:45:34,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 214 transitions, 1433 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 12:45:34,268 INFO L231 Difference]: Finished difference. Result has 119 places, 94 transitions, 519 flow [2022-12-13 12:45:34,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=519, PETRI_PLACES=119, PETRI_TRANSITIONS=94} [2022-12-13 12:45:34,268 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, 6 predicate places. [2022-12-13 12:45:34,268 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 94 transitions, 519 flow [2022-12-13 12:45:34,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 748.047619047619) internal successors, (15709), 21 states have internal predecessors, (15709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:34,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:45:34,270 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:45:34,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:45:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 12:45:34,471 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:45:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1393272974, now seen corresponding path program 1 times [2022-12-13 12:45:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015203367] [2022-12-13 12:45:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:45:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015203367] [2022-12-13 12:45:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015203367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:45:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680595569] [2022-12-13 12:45:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:34,916 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:34,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:45:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:45:35,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:35,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-12-13 12:45:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:45:35,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:45:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:45:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680595569] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:45:35,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:45:35,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 6] total 17 [2022-12-13 12:45:35,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527662190] [2022-12-13 12:45:35,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:45:35,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:45:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:45:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:45:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:45:35,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 765 out of 1893 [2022-12-13 12:45:35,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 94 transitions, 519 flow. Second operand has 4 states, 4 states have (on average 768.75) internal successors, (3075), 4 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:35,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:45:35,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 765 of 1893 [2022-12-13 12:45:35,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:45:56,470 INFO L130 PetriNetUnfolder]: 93496/125821 cut-off events. [2022-12-13 12:45:56,470 INFO L131 PetriNetUnfolder]: For 149798/149798 co-relation queries the response was YES. [2022-12-13 12:45:57,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374224 conditions, 125821 events. 93496/125821 cut-off events. For 149798/149798 co-relation queries the response was YES. Maximal size of possible extension queue 1841. Compared 746647 event pairs, 53017 based on Foata normal form. 3750/111431 useless extension candidates. Maximal degree in co-relation 374192. Up to 91148 conditions per place. [2022-12-13 12:45:57,589 INFO L137 encePairwiseOnDemand]: 1887/1893 looper letters, 140 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2022-12-13 12:45:57,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 142 transitions, 1021 flow [2022-12-13 12:45:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:45:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:45:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2400 transitions. [2022-12-13 12:45:57,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4226096143687269 [2022-12-13 12:45:57,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2400 transitions. [2022-12-13 12:45:57,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2400 transitions. [2022-12-13 12:45:57,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:45:57,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2400 transitions. [2022-12-13 12:45:57,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 800.0) internal successors, (2400), 3 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:57,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:57,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:57,599 INFO L175 Difference]: Start difference. First operand has 119 places, 94 transitions, 519 flow. Second operand 3 states and 2400 transitions. [2022-12-13 12:45:57,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 142 transitions, 1021 flow [2022-12-13 12:45:58,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 142 transitions, 977 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-12-13 12:45:58,038 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 501 flow [2022-12-13 12:45:58,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2022-12-13 12:45:58,038 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, 2 predicate places. [2022-12-13 12:45:58,038 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 501 flow [2022-12-13 12:45:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 768.75) internal successors, (3075), 4 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:58,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:45:58,039 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:45:58,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 12:45:58,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 12:45:58,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:45:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash -244909108, now seen corresponding path program 1 times [2022-12-13 12:45:58,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:58,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053639178] [2022-12-13 12:45:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:45:58,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053639178] [2022-12-13 12:45:58,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053639178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:45:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602621438] [2022-12-13 12:45:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:58,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:58,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:45:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:45:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:58,879 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:45:58,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:45:58,922 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 12:45:58,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 12:45:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:59,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 12:45:59,085 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:45:59,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 12:45:59,139 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 12:45:59,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 12:45:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:45:59,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:45:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 120 [2022-12-13 12:45:59,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 118 [2022-12-13 12:46:05,528 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:46:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:46:06,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602621438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:46:06,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:46:06,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 28 [2022-12-13 12:46:06,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209280737] [2022-12-13 12:46:06,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:46:06,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:46:06,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:46:06,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:46:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-12-13 12:46:12,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:19,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 731 out of 1893 [2022-12-13 12:46:19,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 501 flow. Second operand has 30 states, 30 states have (on average 732.9666666666667) internal successors, (21989), 30 states have internal predecessors, (21989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:46:19,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:46:19,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 731 of 1893 [2022-12-13 12:46:19,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:46:56,351 INFO L130 PetriNetUnfolder]: 165226/221579 cut-off events. [2022-12-13 12:46:56,351 INFO L131 PetriNetUnfolder]: For 237289/237289 co-relation queries the response was YES. [2022-12-13 12:46:57,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673587 conditions, 221579 events. 165226/221579 cut-off events. For 237289/237289 co-relation queries the response was YES. Maximal size of possible extension queue 2398. Compared 1346293 event pairs, 12391 based on Foata normal form. 2250/195701 useless extension candidates. Maximal degree in co-relation 673555. Up to 67352 conditions per place. [2022-12-13 12:46:58,422 INFO L137 encePairwiseOnDemand]: 1880/1893 looper letters, 334 selfloop transitions, 27 changer transitions 0/361 dead transitions. [2022-12-13 12:46:58,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 361 transitions, 2404 flow [2022-12-13 12:46:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:46:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 12:46:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 12724 transitions. [2022-12-13 12:46:58,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39538858332556476 [2022-12-13 12:46:58,434 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 12724 transitions. [2022-12-13 12:46:58,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 12724 transitions. [2022-12-13 12:46:58,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:46:58,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 12724 transitions. [2022-12-13 12:46:58,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 748.4705882352941) internal successors, (12724), 17 states have internal predecessors, (12724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:46:58,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 1893.0) internal successors, (34074), 18 states have internal predecessors, (34074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:46:58,469 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 1893.0) internal successors, (34074), 18 states have internal predecessors, (34074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:46:58,469 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 501 flow. Second operand 17 states and 12724 transitions. [2022-12-13 12:46:58,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 361 transitions, 2404 flow [2022-12-13 12:47:14,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 361 transitions, 2395 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:47:14,167 INFO L231 Difference]: Finished difference. Result has 135 places, 103 transitions, 653 flow [2022-12-13 12:47:14,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=653, PETRI_PLACES=135, PETRI_TRANSITIONS=103} [2022-12-13 12:47:14,168 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, 22 predicate places. [2022-12-13 12:47:14,168 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 103 transitions, 653 flow [2022-12-13 12:47:14,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 732.9666666666667) internal successors, (21989), 30 states have internal predecessors, (21989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:14,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:47:14,170 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:14,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 12:47:14,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:14,371 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:47:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1538732798, now seen corresponding path program 1 times [2022-12-13 12:47:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:14,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444639297] [2022-12-13 12:47:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:47:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444639297] [2022-12-13 12:47:14,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444639297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637642124] [2022-12-13 12:47:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:14,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:14,684 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:14,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:47:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:47:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:47:14,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:15,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 12:47:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:47:15,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637642124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:15,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:15,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2022-12-13 12:47:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137724048] [2022-12-13 12:47:15,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 12:47:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 12:47:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-12-13 12:47:19,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 746 out of 1893 [2022-12-13 12:47:19,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 103 transitions, 653 flow. Second operand has 28 states, 28 states have (on average 747.75) internal successors, (20937), 28 states have internal predecessors, (20937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:47:19,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 746 of 1893 [2022-12-13 12:47:19,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:48:22,926 INFO L130 PetriNetUnfolder]: 257062/344339 cut-off events. [2022-12-13 12:48:22,926 INFO L131 PetriNetUnfolder]: For 525460/525460 co-relation queries the response was YES. [2022-12-13 12:48:25,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090578 conditions, 344339 events. 257062/344339 cut-off events. For 525460/525460 co-relation queries the response was YES. Maximal size of possible extension queue 3796. Compared 2237922 event pairs, 78363 based on Foata normal form. 15408/319031 useless extension candidates. Maximal degree in co-relation 1090540. Up to 139718 conditions per place. [2022-12-13 12:48:26,322 INFO L137 encePairwiseOnDemand]: 1882/1893 looper letters, 429 selfloop transitions, 22 changer transitions 0/451 dead transitions. [2022-12-13 12:48:26,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 451 transitions, 3613 flow [2022-12-13 12:48:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:48:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 12:48:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 10014 transitions. [2022-12-13 12:48:26,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4069242959892722 [2022-12-13 12:48:26,331 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 10014 transitions. [2022-12-13 12:48:26,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 10014 transitions. [2022-12-13 12:48:26,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:48:26,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 10014 transitions. [2022-12-13 12:48:26,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 770.3076923076923) internal successors, (10014), 13 states have internal predecessors, (10014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:26,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 1893.0) internal successors, (26502), 14 states have internal predecessors, (26502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:26,354 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 1893.0) internal successors, (26502), 14 states have internal predecessors, (26502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:26,354 INFO L175 Difference]: Start difference. First operand has 135 places, 103 transitions, 653 flow. Second operand 13 states and 10014 transitions. [2022-12-13 12:48:26,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 451 transitions, 3613 flow [2022-12-13 12:48:32,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 451 transitions, 3556 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-12-13 12:48:32,620 INFO L231 Difference]: Finished difference. Result has 139 places, 106 transitions, 703 flow [2022-12-13 12:48:32,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=703, PETRI_PLACES=139, PETRI_TRANSITIONS=106} [2022-12-13 12:48:32,620 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, 26 predicate places. [2022-12-13 12:48:32,620 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 106 transitions, 703 flow [2022-12-13 12:48:32,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 747.75) internal successors, (20937), 28 states have internal predecessors, (20937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:32,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:48:32,622 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:48:32,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 12:48:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:32,824 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:48:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash -721886156, now seen corresponding path program 1 times [2022-12-13 12:48:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:32,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585671123] [2022-12-13 12:48:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:32,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:48:33,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585671123] [2022-12-13 12:48:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585671123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863227171] [2022-12-13 12:48:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:33,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:33,040 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:33,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:48:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:48:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:48:33,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:48:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:48:33,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863227171] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:33,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:48:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 5] total 13 [2022-12-13 12:48:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068904090] [2022-12-13 12:48:33,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:48:33,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:48:33,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:48:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:48:35,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:48:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:48:39,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:48:41,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:48:41,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 766 out of 1893 [2022-12-13 12:48:41,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 106 transitions, 703 flow. Second operand has 4 states, 4 states have (on average 770.25) internal successors, (3081), 4 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:41,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:48:41,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 766 of 1893 [2022-12-13 12:48:41,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:49:56,590 INFO L130 PetriNetUnfolder]: 286330/386849 cut-off events. [2022-12-13 12:49:56,590 INFO L131 PetriNetUnfolder]: For 761188/761188 co-relation queries the response was YES. [2022-12-13 12:49:59,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326423 conditions, 386849 events. 286330/386849 cut-off events. For 761188/761188 co-relation queries the response was YES. Maximal size of possible extension queue 4257. Compared 2584915 event pairs, 190011 based on Foata normal form. 15228/357389 useless extension candidates. Maximal degree in co-relation 1326382. Up to 318066 conditions per place. [2022-12-13 12:50:00,868 INFO L137 encePairwiseOnDemand]: 1887/1893 looper letters, 162 selfloop transitions, 1 changer transitions 0/163 dead transitions. [2022-12-13 12:50:00,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 163 transitions, 1414 flow [2022-12-13 12:50:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:50:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:50:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2401 transitions. [2022-12-13 12:50:00,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4227857017080472 [2022-12-13 12:50:00,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2401 transitions. [2022-12-13 12:50:00,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2401 transitions. [2022-12-13 12:50:00,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:50:00,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2401 transitions. [2022-12-13 12:50:00,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 800.3333333333334) internal successors, (2401), 3 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:00,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:00,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1893.0) internal successors, (7572), 4 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:00,878 INFO L175 Difference]: Start difference. First operand has 139 places, 106 transitions, 703 flow. Second operand 3 states and 2401 transitions. [2022-12-13 12:50:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 163 transitions, 1414 flow [2022-12-13 12:50:06,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 163 transitions, 1343 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-12-13 12:50:06,731 INFO L231 Difference]: Finished difference. Result has 132 places, 105 transitions, 657 flow [2022-12-13 12:50:06,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1893, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=657, PETRI_PLACES=132, PETRI_TRANSITIONS=105} [2022-12-13 12:50:06,732 INFO L288 CegarLoopForPetriNet]: 113 programPoint places, 19 predicate places. [2022-12-13 12:50:06,732 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 105 transitions, 657 flow [2022-12-13 12:50:06,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 770.25) internal successors, (3081), 4 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:06,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:50:06,732 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:50:06,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 12:50:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 12:50:06,934 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-13 12:50:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:50:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash -906825018, now seen corresponding path program 1 times [2022-12-13 12:50:06,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:50:06,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093322333] [2022-12-13 12:50:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:50:06,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:50:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:50:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:50:07,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:50:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093322333] [2022-12-13 12:50:07,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093322333] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:50:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774369318] [2022-12-13 12:50:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:50:07,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:50:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:50:07,163 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:50:07,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4fbdab-c88d-49bd-96c1-69f734701c10/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:50:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:50:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 12:50:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:50:07,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:50:07,465 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 12:50:07,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 12:50:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 12:50:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:50:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 12:50:07,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774369318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:50:07,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:50:07,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 10] total 31 [2022-12-13 12:50:07,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478910448] [2022-12-13 12:50:07,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:50:07,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 12:50:07,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:50:07,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 12:50:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:50:18,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 737 out of 1893 [2022-12-13 12:50:18,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 105 transitions, 657 flow. Second operand has 32 states, 32 states have (on average 739.0625) internal successors, (23650), 32 states have internal predecessors, (23650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:18,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:50:18,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 737 of 1893 [2022-12-13 12:50:18,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand