./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- 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-5e519f3 [2022-11-02 20:42:46,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:42:46,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:42:46,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:42:46,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:42:46,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:42:46,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:42:46,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:42:46,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:42:46,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:42:46,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:42:46,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:42:46,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:42:46,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:42:46,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:42:46,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:42:46,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:42:46,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:42:46,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:42:46,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:42:46,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:42:46,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:42:46,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:42:46,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:42:46,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:42:46,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:42:46,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:42:46,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:42:46,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:42:46,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:42:46,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:42:46,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:42:46,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:42:46,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:42:46,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:42:46,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:42:46,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:42:46,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:42:46,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:42:46,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:42:46,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:42:46,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:42:46,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:42:46,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:42:46,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:42:46,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:42:46,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:42:46,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:42:46,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:42:46,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:42:46,654 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:42:46,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:42:46,655 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:42:46,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:42:46,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:42:46,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:42:46,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:42:46,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:42:46,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:42:46,657 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:42:46,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:42:46,658 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:42:46,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:42:46,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:42:46,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:42:46,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:42:46,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:42:46,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:42:46,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:42:46,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:42:46,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:42:46,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:42:46,661 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:42:46,661 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:42:46,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:42:46,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2022-11-02 20:42:46,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:42:46,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:42:46,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:42:46,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:42:46,976 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:42:46,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-11-02 20:42:47,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/data/d73abe1af/9dedc5d2b3624e03a62e9a2eac26c8f1/FLAG08a1693a0 [2022-11-02 20:42:47,594 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:42:47,598 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-11-02 20:42:47,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/data/d73abe1af/9dedc5d2b3624e03a62e9a2eac26c8f1/FLAG08a1693a0 [2022-11-02 20:42:47,941 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/data/d73abe1af/9dedc5d2b3624e03a62e9a2eac26c8f1 [2022-11-02 20:42:47,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:42:47,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:42:47,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:42:47,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:42:47,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:42:47,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:42:47" (1/1) ... [2022-11-02 20:42:47,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7ce5a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:47, skipping insertion in model container [2022-11-02 20:42:47,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:42:47" (1/1) ... [2022-11-02 20:42:47,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:42:47,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:42:48,220 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-11-02 20:42:48,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:42:48,243 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:42:48,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-11-02 20:42:48,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:42:48,290 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:42:48,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48 WrapperNode [2022-11-02 20:42:48,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:42:48,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:42:48,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:42:48,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:42:48,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,345 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-02 20:42:48,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:42:48,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:42:48,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:42:48,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:42:48,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,370 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:42:48,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:42:48,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:42:48,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:42:48,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (1/1) ... [2022-11-02 20:42:48,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:42:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:48,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:42:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:42:48,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:42:48,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:42:48,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:42:48,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:42:48,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:42:48,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 20:42:48,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 20:42:48,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-02 20:42:48,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-02 20:42:48,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:42:48,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:42:48,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:42:48,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:42:48,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:42:48,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:42:48,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:42:48,460 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:42:48,558 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:42:48,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:42:48,923 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:42:48,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:42:48,932 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:42:48,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:42:48 BoogieIcfgContainer [2022-11-02 20:42:48,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:42:48,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:42:48,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:42:48,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:42:48,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:42:47" (1/3) ... [2022-11-02 20:42:48,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5416025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:42:48, skipping insertion in model container [2022-11-02 20:42:48,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:48" (2/3) ... [2022-11-02 20:42:48,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5416025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:42:48, skipping insertion in model container [2022-11-02 20:42:48,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:42:48" (3/3) ... [2022-11-02 20:42:48,949 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2022-11-02 20:42:48,958 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:42:48,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:42:48,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:42:48,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:42:49,096 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:42:49,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2022-11-02 20:42:49,262 INFO L130 PetriNetUnfolder]: 10/133 cut-off events. [2022-11-02 20:42:49,262 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:42:49,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-02 20:42:49,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2022-11-02 20:42:49,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2022-11-02 20:42:49,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:42:49,309 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60625a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:42:49,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:42:49,385 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2022-11-02 20:42:49,385 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:42:49,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:42:49,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:49,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:42:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash 552568241, now seen corresponding path program 1 times [2022-11-02 20:42:49,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:49,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925515207] [2022-11-02 20:42:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:49,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925515207] [2022-11-02 20:42:49,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925515207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:49,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:49,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:42:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386082555] [2022-11-02 20:42:49,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:49,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:42:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:42:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:42:49,808 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2022-11-02 20:42:49,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:49,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:42:49,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2022-11-02 20:42:49,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:42:49,872 INFO L130 PetriNetUnfolder]: 4/114 cut-off events. [2022-11-02 20:42:49,873 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:42:49,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2022-11-02 20:42:49,876 INFO L137 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2022-11-02 20:42:49,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2022-11-02 20:42:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:42:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:42:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-11-02 20:42:49,898 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2022-11-02 20:42:49,899 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-11-02 20:42:49,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-11-02 20:42:49,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:42:49,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-11-02 20:42:49,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:49,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:49,926 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:49,929 INFO L175 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2022-11-02 20:42:49,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2022-11-02 20:42:49,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-02 20:42:49,942 INFO L231 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2022-11-02 20:42:49,944 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2022-11-02 20:42:49,950 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2022-11-02 20:42:49,950 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2022-11-02 20:42:49,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:49,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:42:49,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:49,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:42:49,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:42:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -712841604, now seen corresponding path program 1 times [2022-11-02 20:42:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:49,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283928726] [2022-11-02 20:42:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283928726] [2022-11-02 20:42:51,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283928726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:51,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:51,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:42:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787491289] [2022-11-02 20:42:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:51,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:51,206 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2022-11-02 20:42:51,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:51,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:42:51,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2022-11-02 20:42:51,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:42:53,053 INFO L130 PetriNetUnfolder]: 5788/8844 cut-off events. [2022-11-02 20:42:53,054 INFO L131 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2022-11-02 20:42:53,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52488 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2022-11-02 20:42:53,129 INFO L137 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2022-11-02 20:42:53,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2022-11-02 20:42:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:42:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:42:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2022-11-02 20:42:53,132 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2022-11-02 20:42:53,133 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2022-11-02 20:42:53,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2022-11-02 20:42:53,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:42:53,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2022-11-02 20:42:53,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:53,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:53,140 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:53,140 INFO L175 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2022-11-02 20:42:53,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2022-11-02 20:42:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:42:53,144 INFO L231 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2022-11-02 20:42:53,145 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2022-11-02 20:42:53,145 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-11-02 20:42:53,146 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2022-11-02 20:42:53,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:53,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:42:53,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:53,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:42:53,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:42:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2022-11-02 20:42:53,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:53,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208456303] [2022-11-02 20:42:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:53,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:53,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208456303] [2022-11-02 20:42:53,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208456303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886558928] [2022-11-02 20:42:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:53,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:53,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:53,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:42:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:42:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:54,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:54,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886558928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:54,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:54,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-02 20:42:54,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187800476] [2022-11-02 20:42:54,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:54,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:42:54,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:42:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:42:54,820 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-02 20:42:54,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:54,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:42:54,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-02 20:42:54,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:42:58,217 INFO L130 PetriNetUnfolder]: 9819/14701 cut-off events. [2022-11-02 20:42:58,217 INFO L131 PetriNetUnfolder]: For 2287/2361 co-relation queries the response was YES. [2022-11-02 20:42:58,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31278 conditions, 14701 events. 9819/14701 cut-off events. For 2287/2361 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 94730 event pairs, 1381 based on Foata normal form. 2/12471 useless extension candidates. Maximal degree in co-relation 31271. Up to 6565 conditions per place. [2022-11-02 20:42:58,395 INFO L137 encePairwiseOnDemand]: 122/137 looper letters, 181 selfloop transitions, 26 changer transitions 1/270 dead transitions. [2022-11-02 20:42:58,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 270 transitions, 1086 flow [2022-11-02 20:42:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:42:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:42:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-11-02 20:42:58,401 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-11-02 20:42:58,401 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-11-02 20:42:58,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-11-02 20:42:58,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:42:58,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-11-02 20:42:58,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:58,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:58,414 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:58,414 INFO L175 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 14 states and 1306 transitions. [2022-11-02 20:42:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 270 transitions, 1086 flow [2022-11-02 20:42:58,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 270 transitions, 1063 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-02 20:42:58,426 INFO L231 Difference]: Finished difference. Result has 138 places, 132 transitions, 434 flow [2022-11-02 20:42:58,427 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=434, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2022-11-02 20:42:58,430 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2022-11-02 20:42:58,430 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 434 flow [2022-11-02 20:42:58,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:58,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:42:58,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:58,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:58,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:58,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:42:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1260887189, now seen corresponding path program 2 times [2022-11-02 20:42:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554882926] [2022-11-02 20:42:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:59,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:59,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554882926] [2022-11-02 20:42:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554882926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:59,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:59,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359411423] [2022-11-02 20:42:59,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:42:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:42:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:42:59,302 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-02 20:42:59,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:59,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:42:59,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-02 20:42:59,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:01,864 INFO L130 PetriNetUnfolder]: 9701/14941 cut-off events. [2022-11-02 20:43:01,864 INFO L131 PetriNetUnfolder]: For 20337/20370 co-relation queries the response was YES. [2022-11-02 20:43:01,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40011 conditions, 14941 events. 9701/14941 cut-off events. For 20337/20370 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 98476 event pairs, 5870 based on Foata normal form. 35/13531 useless extension candidates. Maximal degree in co-relation 39998. Up to 12875 conditions per place. [2022-11-02 20:43:02,156 INFO L137 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2022-11-02 20:43:02,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 158 transitions, 742 flow [2022-11-02 20:43:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:43:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:43:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-11-02 20:43:02,162 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-11-02 20:43:02,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-11-02 20:43:02,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-11-02 20:43:02,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:02,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-11-02 20:43:02,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,167 INFO L175 Difference]: Start difference. First operand has 138 places, 132 transitions, 434 flow. Second operand 6 states and 550 transitions. [2022-11-02 20:43:02,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 158 transitions, 742 flow [2022-11-02 20:43:02,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 158 transitions, 727 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:43:02,210 INFO L231 Difference]: Finished difference. Result has 141 places, 136 transitions, 502 flow [2022-11-02 20:43:02,210 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2022-11-02 20:43:02,212 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 18 predicate places. [2022-11-02 20:43:02,212 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 502 flow [2022-11-02 20:43:02,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:02,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:02,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:43:02,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:43:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2125178528, now seen corresponding path program 1 times [2022-11-02 20:43:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:02,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733325115] [2022-11-02 20:43:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:02,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:02,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733325115] [2022-11-02 20:43:02,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733325115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:02,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:02,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:43:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906498669] [2022-11-02 20:43:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:43:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:43:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:43:02,702 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-02 20:43:02,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:02,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-02 20:43:02,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:05,189 INFO L130 PetriNetUnfolder]: 9680/14962 cut-off events. [2022-11-02 20:43:05,189 INFO L131 PetriNetUnfolder]: For 24241/24312 co-relation queries the response was YES. [2022-11-02 20:43:05,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41084 conditions, 14962 events. 9680/14962 cut-off events. For 24241/24312 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 99250 event pairs, 5859 based on Foata normal form. 0/13542 useless extension candidates. Maximal degree in co-relation 41068. Up to 12875 conditions per place. [2022-11-02 20:43:05,385 INFO L137 encePairwiseOnDemand]: 126/137 looper letters, 88 selfloop transitions, 21 changer transitions 1/172 dead transitions. [2022-11-02 20:43:05,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 172 transitions, 964 flow [2022-11-02 20:43:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:43:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:43:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2022-11-02 20:43:05,388 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6715328467153284 [2022-11-02 20:43:05,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2022-11-02 20:43:05,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2022-11-02 20:43:05,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:05,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2022-11-02 20:43:05,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:05,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:05,394 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:05,394 INFO L175 Difference]: Start difference. First operand has 141 places, 136 transitions, 502 flow. Second operand 6 states and 552 transitions. [2022-11-02 20:43:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 172 transitions, 964 flow [2022-11-02 20:43:05,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 907 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-11-02 20:43:05,428 INFO L231 Difference]: Finished difference. Result has 145 places, 146 transitions, 620 flow [2022-11-02 20:43:05,429 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2022-11-02 20:43:05,430 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 22 predicate places. [2022-11-02 20:43:05,430 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 620 flow [2022-11-02 20:43:05,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:05,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:05,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:05,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:43:05,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:43:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash 77620927, now seen corresponding path program 1 times [2022-11-02 20:43:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:05,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893291084] [2022-11-02 20:43:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:05,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893291084] [2022-11-02 20:43:05,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893291084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883096965] [2022-11-02 20:43:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:05,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:05,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:05,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:06,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:43:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:43:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:06,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:06,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883096965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:06,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:06,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-02 20:43:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200221625] [2022-11-02 20:43:06,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:06,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:43:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:43:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:43:06,879 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-02 20:43:06,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 620 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:06,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:06,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-02 20:43:06,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:11,642 INFO L130 PetriNetUnfolder]: 15101/24273 cut-off events. [2022-11-02 20:43:11,642 INFO L131 PetriNetUnfolder]: For 34677/34728 co-relation queries the response was YES. [2022-11-02 20:43:11,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68014 conditions, 24273 events. 15101/24273 cut-off events. For 34677/34728 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 181713 event pairs, 1890 based on Foata normal form. 623/24598 useless extension candidates. Maximal degree in co-relation 67996. Up to 10026 conditions per place. [2022-11-02 20:43:11,898 INFO L137 encePairwiseOnDemand]: 122/137 looper letters, 253 selfloop transitions, 32 changer transitions 2/349 dead transitions. [2022-11-02 20:43:11,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 349 transitions, 2194 flow [2022-11-02 20:43:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:43:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:43:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1305 transitions. [2022-11-02 20:43:11,902 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6803962460896767 [2022-11-02 20:43:11,903 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1305 transitions. [2022-11-02 20:43:11,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1305 transitions. [2022-11-02 20:43:11,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:11,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1305 transitions. [2022-11-02 20:43:11,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.21428571428571) internal successors, (1305), 14 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:11,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:11,911 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:11,911 INFO L175 Difference]: Start difference. First operand has 145 places, 146 transitions, 620 flow. Second operand 14 states and 1305 transitions. [2022-11-02 20:43:11,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 349 transitions, 2194 flow [2022-11-02 20:43:11,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 349 transitions, 2177 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:43:11,979 INFO L231 Difference]: Finished difference. Result has 164 places, 156 transitions, 763 flow [2022-11-02 20:43:11,979 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=763, PETRI_PLACES=164, PETRI_TRANSITIONS=156} [2022-11-02 20:43:11,980 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 41 predicate places. [2022-11-02 20:43:11,980 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 156 transitions, 763 flow [2022-11-02 20:43:11,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:11,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:11,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:12,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:12,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:43:12,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:43:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 931949626, now seen corresponding path program 2 times [2022-11-02 20:43:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267045735] [2022-11-02 20:43:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:12,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:12,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267045735] [2022-11-02 20:43:12,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267045735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:12,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:12,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:43:12,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300519071] [2022-11-02 20:43:12,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:12,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:43:12,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:43:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:43:12,846 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-02 20:43:12,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 156 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:12,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:12,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-02 20:43:12,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:17,390 INFO L130 PetriNetUnfolder]: 16638/25497 cut-off events. [2022-11-02 20:43:17,391 INFO L131 PetriNetUnfolder]: For 66335/66398 co-relation queries the response was YES. [2022-11-02 20:43:17,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88385 conditions, 25497 events. 16638/25497 cut-off events. For 66335/66398 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 179745 event pairs, 8095 based on Foata normal form. 480/25661 useless extension candidates. Maximal degree in co-relation 88359. Up to 16663 conditions per place. [2022-11-02 20:43:17,674 INFO L137 encePairwiseOnDemand]: 127/137 looper letters, 132 selfloop transitions, 21 changer transitions 2/217 dead transitions. [2022-11-02 20:43:17,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1444 flow [2022-11-02 20:43:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:43:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:43:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-11-02 20:43:17,677 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-11-02 20:43:17,677 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-11-02 20:43:17,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-11-02 20:43:17,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:17,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-11-02 20:43:17,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:17,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:17,682 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:17,683 INFO L175 Difference]: Start difference. First operand has 164 places, 156 transitions, 763 flow. Second operand 7 states and 649 transitions. [2022-11-02 20:43:17,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1444 flow [2022-11-02 20:43:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1428 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-02 20:43:18,002 INFO L231 Difference]: Finished difference. Result has 169 places, 157 transitions, 824 flow [2022-11-02 20:43:18,002 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=824, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2022-11-02 20:43:18,003 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 46 predicate places. [2022-11-02 20:43:18,003 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 824 flow [2022-11-02 20:43:18,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:18,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:18,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:43:18,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:43:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 599529518, now seen corresponding path program 1 times [2022-11-02 20:43:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729307716] [2022-11-02 20:43:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:18,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729307716] [2022-11-02 20:43:18,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729307716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:18,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:18,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:43:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231746953] [2022-11-02 20:43:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:18,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:43:18,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:43:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:43:18,385 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-02 20:43:18,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 824 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:18,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:43:18,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-02 20:43:18,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:43:23,407 INFO L130 PetriNetUnfolder]: 18218/27769 cut-off events. [2022-11-02 20:43:23,407 INFO L131 PetriNetUnfolder]: For 89489/89530 co-relation queries the response was YES. [2022-11-02 20:43:23,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101831 conditions, 27769 events. 18218/27769 cut-off events. For 89489/89530 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 195203 event pairs, 9843 based on Foata normal form. 488/27945 useless extension candidates. Maximal degree in co-relation 101803. Up to 19090 conditions per place. [2022-11-02 20:43:23,673 INFO L137 encePairwiseOnDemand]: 127/137 looper letters, 134 selfloop transitions, 21 changer transitions 2/219 dead transitions. [2022-11-02 20:43:23,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 1555 flow [2022-11-02 20:43:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:43:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:43:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-11-02 20:43:23,677 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-11-02 20:43:23,677 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-11-02 20:43:23,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-11-02 20:43:23,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:43:23,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-11-02 20:43:23,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:23,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:23,683 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:23,683 INFO L175 Difference]: Start difference. First operand has 169 places, 157 transitions, 824 flow. Second operand 7 states and 649 transitions. [2022-11-02 20:43:23,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 1555 flow [2022-11-02 20:43:24,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1530 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:43:24,012 INFO L231 Difference]: Finished difference. Result has 173 places, 158 transitions, 878 flow [2022-11-02 20:43:24,012 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-11-02 20:43:24,013 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, 50 predicate places. [2022-11-02 20:43:24,013 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 878 flow [2022-11-02 20:43:24,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:24,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:43:24,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:24,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:43:24,014 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:43:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:24,015 INFO L85 PathProgramCache]: Analyzing trace with hash 797535287, now seen corresponding path program 1 times [2022-11-02 20:43:24,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:24,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451951350] [2022-11-02 20:43:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:24,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:29,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451951350] [2022-11-02 20:43:29,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451951350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:29,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383081694] [2022-11-02 20:43:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:29,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:29,982 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:30,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de06f68-863d-453b-bb49-fd7a53e8cdc9/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:43:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:43:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:48,008 WARN L234 SmtUtils]: Spent 12.24s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)