./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:45:59,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:45:59,925 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:45:59,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:45:59,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:45:59,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:45:59,959 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:45:59,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:45:59,960 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:45:59,961 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:45:59,961 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:45:59,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:45:59,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:45:59,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:45:59,964 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:45:59,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:45:59,965 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:45:59,966 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:45:59,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:45:59,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:45:59,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:45:59,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:45:59,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:45:59,969 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:45:59,970 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:45:59,970 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:45:59,970 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:45:59,971 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:45:59,971 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:45:59,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:45:59,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:45:59,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:45:59,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:45:59,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:45:59,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:45:59,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:45:59,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:45:59,975 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:45:59,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:45:59,975 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:45:59,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:45:59,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:45:59,976 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2023-11-29 03:46:00,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:46:00,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:46:00,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:46:00,268 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:46:00,268 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:46:00,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-29 03:46:03,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:46:03,676 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:46:03,677 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2023-11-29 03:46:03,685 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/data/90d2dc747/b2414b6073ba4d4b9eaef897913741da/FLAG43d772d9b [2023-11-29 03:46:03,700 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/data/90d2dc747/b2414b6073ba4d4b9eaef897913741da [2023-11-29 03:46:03,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:46:03,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:46:03,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:46:03,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:46:03,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:46:03,714 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:46:03" (1/1) ... [2023-11-29 03:46:03,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3956eb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:03, skipping insertion in model container [2023-11-29 03:46:03,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:46:03" (1/1) ... [2023-11-29 03:46:03,748 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:46:03,970 WARN L240 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_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2592,2605] [2023-11-29 03:46:03,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:46:03,996 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:46:04,025 WARN L240 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_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2592,2605] [2023-11-29 03:46:04,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:46:04,041 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:46:04,041 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:46:04,051 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:46:04,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04 WrapperNode [2023-11-29 03:46:04,052 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:46:04,053 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:46:04,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:46:04,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:46:04,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,103 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-11-29 03:46:04,103 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:46:04,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:46:04,104 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:46:04,104 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:46:04,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,141 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 03:46:04,142 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,162 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:46:04,163 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:46:04,163 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:46:04,163 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:46:04,164 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (1/1) ... [2023-11-29 03:46:04,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:46:04,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:04,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:46:04,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:46:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:46:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:46:04,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:46:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:46:04,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:46:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:46:04,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:46:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:46:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:46:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:46:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:46:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:46:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:46:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:46:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:46:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:46:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:46:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:46:04,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:46:04,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:46:04,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:46:04,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:46:04,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:46:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:46:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:46:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:46:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:46:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:46:04,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:46:04,235 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:46:04,351 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:46:04,353 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:46:04,638 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:46:04,908 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:46:04,908 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 03:46:04,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:46:04 BoogieIcfgContainer [2023-11-29 03:46:04,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:46:04,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:46:04,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:46:04,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:46:04,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:46:03" (1/3) ... [2023-11-29 03:46:04,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a40095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:46:04, skipping insertion in model container [2023-11-29 03:46:04,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:04" (2/3) ... [2023-11-29 03:46:04,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a40095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:46:04, skipping insertion in model container [2023-11-29 03:46:04,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:46:04" (3/3) ... [2023-11-29 03:46:04,920 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2023-11-29 03:46:04,931 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:46:04,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:46:04,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:46:04,944 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:46:05,006 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 03:46:05,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-29 03:46:05,088 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-29 03:46:05,089 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:46:05,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-29 03:46:05,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-29 03:46:05,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-29 03:46:05,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:46:05,118 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=LoopHeads, 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;@9d84996, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:46:05,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 03:46:05,136 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:46:05,136 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-29 03:46:05,137 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:46:05,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:05,138 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] [2023-11-29 03:46:05,138 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 1 more)] === [2023-11-29 03:46:05,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash -295874381, now seen corresponding path program 1 times [2023-11-29 03:46:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927068174] [2023-11-29 03:46:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:05,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:05,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927068174] [2023-11-29 03:46:05,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927068174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:05,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:05,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:46:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388246150] [2023-11-29 03:46:05,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:05,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:46:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:46:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:46:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:46:05,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:05,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:05,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:46:05,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:05,956 INFO L124 PetriNetUnfolderBase]: 674/1034 cut-off events. [2023-11-29 03:46:05,957 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-29 03:46:05,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2118 conditions, 1034 events. 674/1034 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4060 event pairs, 140 based on Foata normal form. 1/1021 useless extension candidates. Maximal degree in co-relation 1706. Up to 740 conditions per place. [2023-11-29 03:46:05,971 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-29 03:46:05,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2023-11-29 03:46:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:46:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:46:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 03:46:05,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-29 03:46:05,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 03:46:05,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 03:46:05,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:05,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 03:46:05,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:05,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:05,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:05,997 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-29 03:46:05,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2023-11-29 03:46:06,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:46:06,007 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-11-29 03:46:06,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-29 03:46:06,014 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-29 03:46:06,014 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-11-29 03:46:06,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:06,015 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] [2023-11-29 03:46:06,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:46:06,016 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 1 more)] === [2023-11-29 03:46:06,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2110752150, now seen corresponding path program 1 times [2023-11-29 03:46:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:06,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211736073] [2023-11-29 03:46:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211736073] [2023-11-29 03:46:06,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211736073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:06,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:06,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:46:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114322196] [2023-11-29 03:46:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:46:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:46:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:46:06,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:46:06,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:06,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:46:06,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:06,440 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2023-11-29 03:46:06,441 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-11-29 03:46:06,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4230 event pairs, 447 based on Foata normal form. 0/1003 useless extension candidates. Maximal degree in co-relation 865. Up to 984 conditions per place. [2023-11-29 03:46:06,467 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-29 03:46:06,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2023-11-29 03:46:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:46:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:46:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-29 03:46:06,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 03:46:06,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-29 03:46:06,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-29 03:46:06,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:06,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-29 03:46:06,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,474 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2023-11-29 03:46:06,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2023-11-29 03:46:06,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:46:06,477 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2023-11-29 03:46:06,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-29 03:46:06,478 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-29 03:46:06,479 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2023-11-29 03:46:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:06,479 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] [2023-11-29 03:46:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:46:06,480 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 1 more)] === [2023-11-29 03:46:06,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1169432983, now seen corresponding path program 1 times [2023-11-29 03:46:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615660206] [2023-11-29 03:46:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:46:06,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:06,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615660206] [2023-11-29 03:46:06,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615660206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:06,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:06,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:46:06,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184634206] [2023-11-29 03:46:06,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:06,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:46:06,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:46:06,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:46:06,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:46:06,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:06,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:46:06,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:06,883 INFO L124 PetriNetUnfolderBase]: 865/1278 cut-off events. [2023-11-29 03:46:06,883 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-11-29 03:46:06,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 1278 events. 865/1278 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5201 event pairs, 265 based on Foata normal form. 0/1230 useless extension candidates. Maximal degree in co-relation 2814. Up to 649 conditions per place. [2023-11-29 03:46:06,896 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-29 03:46:06,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2023-11-29 03:46:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:46:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:46:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-29 03:46:06,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-29 03:46:06,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-29 03:46:06,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-29 03:46:06,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:06,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-29 03:46:06,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,902 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2023-11-29 03:46:06,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2023-11-29 03:46:06,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 03:46:06,906 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2023-11-29 03:46:06,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-29 03:46:06,907 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-29 03:46:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2023-11-29 03:46:06,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:06,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:06,908 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] [2023-11-29 03:46:06,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:46:06,909 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 1 more)] === [2023-11-29 03:46:06,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1910939013, now seen corresponding path program 1 times [2023-11-29 03:46:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467769623] [2023-11-29 03:46:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467769623] [2023-11-29 03:46:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467769623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050358713] [2023-11-29 03:46:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:07,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:07,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:07,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:46:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:07,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:46:07,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:07,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050358713] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:07,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:07,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 03:46:07,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476917836] [2023-11-29 03:46:07,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:07,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:46:07,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:46:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:46:07,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:46:07,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:07,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:07,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:46:07,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:07,636 INFO L124 PetriNetUnfolderBase]: 896/1342 cut-off events. [2023-11-29 03:46:07,637 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-11-29 03:46:07,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 1342 events. 896/1342 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5623 event pairs, 253 based on Foata normal form. 0/1280 useless extension candidates. Maximal degree in co-relation 3342. Up to 666 conditions per place. [2023-11-29 03:46:07,650 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-29 03:46:07,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2023-11-29 03:46:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:46:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:46:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-29 03:46:07,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-29 03:46:07,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-29 03:46:07,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-29 03:46:07,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:07,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-29 03:46:07,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:07,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:07,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:07,655 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2023-11-29 03:46:07,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2023-11-29 03:46:07,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:46:07,660 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2023-11-29 03:46:07,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-29 03:46:07,661 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-29 03:46:07,662 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2023-11-29 03:46:07,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:07,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:07,662 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] [2023-11-29 03:46:07,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:46:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:07,868 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 1 more)] === [2023-11-29 03:46:07,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1730873714, now seen corresponding path program 1 times [2023-11-29 03:46:07,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003095758] [2023-11-29 03:46:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:07,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:08,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003095758] [2023-11-29 03:46:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003095758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154023644] [2023-11-29 03:46:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:08,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:08,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:08,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:46:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:08,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:46:08,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:08,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:46:09,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-29 03:46:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:09,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:11,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2023-11-29 03:46:11,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:46:11,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2023-11-29 03:46:12,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2023-11-29 03:46:12,320 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-29 03:46:12,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 103 [2023-11-29 03:46:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154023644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:12,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:12,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2023-11-29 03:46:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36487959] [2023-11-29 03:46:12,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:12,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:46:12,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:46:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:46:13,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:46:13,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:13,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:13,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:46:13,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:15,884 INFO L124 PetriNetUnfolderBase]: 1993/2999 cut-off events. [2023-11-29 03:46:15,884 INFO L125 PetriNetUnfolderBase]: For 1827/1827 co-relation queries the response was YES. [2023-11-29 03:46:15,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8268 conditions, 2999 events. 1993/2999 cut-off events. For 1827/1827 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13796 event pairs, 122 based on Foata normal form. 1/2998 useless extension candidates. Maximal degree in co-relation 6101. Up to 1481 conditions per place. [2023-11-29 03:46:15,906 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2023-11-29 03:46:15,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2023-11-29 03:46:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 03:46:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 03:46:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2023-11-29 03:46:15,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-29 03:46:15,911 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 335 transitions. [2023-11-29 03:46:15,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 335 transitions. [2023-11-29 03:46:15,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:15,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 335 transitions. [2023-11-29 03:46:15,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.952380952380953) internal successors, (335), 21 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:15,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:15,918 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:15,919 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2023-11-29 03:46:15,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2023-11-29 03:46:15,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:46:15,928 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2023-11-29 03:46:15,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2023-11-29 03:46:15,929 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2023-11-29 03:46:15,930 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2023-11-29 03:46:15,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:15,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:15,930 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] [2023-11-29 03:46:15,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 03:46:16,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:16,132 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 1 more)] === [2023-11-29 03:46:16,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -815305122, now seen corresponding path program 2 times [2023-11-29 03:46:16,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:16,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214553643] [2023-11-29 03:46:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:16,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214553643] [2023-11-29 03:46:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214553643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259527731] [2023-11-29 03:46:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:46:16,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:16,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:16,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:16,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:46:16,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:46:16,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:16,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:46:16,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:16,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:46:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-29 03:46:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:17,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:18,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2023-11-29 03:46:18,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:46:18,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2023-11-29 03:46:19,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2023-11-29 03:46:19,290 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-29 03:46:19,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 103 [2023-11-29 03:46:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259527731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:19,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:19,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 03:46:19,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558937706] [2023-11-29 03:46:19,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:46:19,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:46:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:46:19,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:46:19,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 93 transitions, 547 flow. Second operand has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:19,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:19,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:46:19,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:21,396 INFO L124 PetriNetUnfolderBase]: 1667/2654 cut-off events. [2023-11-29 03:46:21,396 INFO L125 PetriNetUnfolderBase]: For 3496/3499 co-relation queries the response was YES. [2023-11-29 03:46:21,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 2654 events. 1667/2654 cut-off events. For 3496/3499 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13231 event pairs, 140 based on Foata normal form. 3/2653 useless extension candidates. Maximal degree in co-relation 7969. Up to 1772 conditions per place. [2023-11-29 03:46:21,427 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 135 selfloop transitions, 49 changer transitions 1/191 dead transitions. [2023-11-29 03:46:21,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 191 transitions, 1251 flow [2023-11-29 03:46:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:46:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 03:46:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 252 transitions. [2023-11-29 03:46:21,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-29 03:46:21,432 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 252 transitions. [2023-11-29 03:46:21,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 252 transitions. [2023-11-29 03:46:21,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:21,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 252 transitions. [2023-11-29 03:46:21,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:21,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:21,436 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:21,436 INFO L175 Difference]: Start difference. First operand has 66 places, 93 transitions, 547 flow. Second operand 15 states and 252 transitions. [2023-11-29 03:46:21,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 191 transitions, 1251 flow [2023-11-29 03:46:21,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 191 transitions, 1133 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-11-29 03:46:21,463 INFO L231 Difference]: Finished difference. Result has 78 places, 113 transitions, 683 flow [2023-11-29 03:46:21,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=683, PETRI_PLACES=78, PETRI_TRANSITIONS=113} [2023-11-29 03:46:21,464 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2023-11-29 03:46:21,465 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 113 transitions, 683 flow [2023-11-29 03:46:21,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:21,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:21,466 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] [2023-11-29 03:46:21,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:46:21,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 03:46:21,667 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 1 more)] === [2023-11-29 03:46:21,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2056143074, now seen corresponding path program 3 times [2023-11-29 03:46:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285762918] [2023-11-29 03:46:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:22,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285762918] [2023-11-29 03:46:22,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285762918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94816720] [2023-11-29 03:46:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:46:22,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:22,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:22,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:46:22,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:46:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:22,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:46:22,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:22,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:46:22,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-29 03:46:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:22,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:23,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2023-11-29 03:46:23,857 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 03:46:23,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2023-11-29 03:46:23,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2023-11-29 03:46:23,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 03:46:23,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2023-11-29 03:46:24,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-11-29 03:46:24,174 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 03:46:24,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 1 [2023-11-29 03:46:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94816720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:24,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2023-11-29 03:46:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404078819] [2023-11-29 03:46:24,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:24,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 03:46:24,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 03:46:24,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:46:24,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:46:24,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 113 transitions, 683 flow. Second operand has 22 states, 22 states have (on average 9.136363636363637) internal successors, (201), 22 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:24,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:24,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:46:24,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:26,445 INFO L124 PetriNetUnfolderBase]: 3115/4684 cut-off events. [2023-11-29 03:46:26,445 INFO L125 PetriNetUnfolderBase]: For 5331/5336 co-relation queries the response was YES. [2023-11-29 03:46:26,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14934 conditions, 4684 events. 3115/4684 cut-off events. For 5331/5336 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23605 event pairs, 256 based on Foata normal form. 6/4689 useless extension candidates. Maximal degree in co-relation 13417. Up to 2759 conditions per place. [2023-11-29 03:46:26,477 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 168 selfloop transitions, 89 changer transitions 2/263 dead transitions. [2023-11-29 03:46:26,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 263 transitions, 1781 flow [2023-11-29 03:46:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:46:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 03:46:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 298 transitions. [2023-11-29 03:46:26,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481203007518797 [2023-11-29 03:46:26,481 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 298 transitions. [2023-11-29 03:46:26,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 298 transitions. [2023-11-29 03:46:26,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:26,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 298 transitions. [2023-11-29 03:46:26,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 15.68421052631579) internal successors, (298), 19 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:26,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:26,484 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:26,484 INFO L175 Difference]: Start difference. First operand has 78 places, 113 transitions, 683 flow. Second operand 19 states and 298 transitions. [2023-11-29 03:46:26,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 263 transitions, 1781 flow [2023-11-29 03:46:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 263 transitions, 1744 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-29 03:46:26,504 INFO L231 Difference]: Finished difference. Result has 98 places, 158 transitions, 1226 flow [2023-11-29 03:46:26,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1226, PETRI_PLACES=98, PETRI_TRANSITIONS=158} [2023-11-29 03:46:26,505 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 61 predicate places. [2023-11-29 03:46:26,505 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 158 transitions, 1226 flow [2023-11-29 03:46:26,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.136363636363637) internal successors, (201), 22 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:26,506 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] [2023-11-29 03:46:26,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:46:26,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:26,706 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 1 more)] === [2023-11-29 03:46:26,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1110975488, now seen corresponding path program 4 times [2023-11-29 03:46:26,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:26,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197060418] [2023-11-29 03:46:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:26,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197060418] [2023-11-29 03:46:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197060418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907676130] [2023-11-29 03:46:27,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:46:27,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:27,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:27,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:27,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:46:27,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:46:27,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:27,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:46:27,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:27,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-29 03:46:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:27,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:27,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:46:27,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-29 03:46:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:28,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907676130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:28,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2023-11-29 03:46:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39962258] [2023-11-29 03:46:28,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:46:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:46:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:46:28,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:46:28,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 158 transitions, 1226 flow. Second operand has 26 states, 26 states have (on average 7.730769230769231) internal successors, (201), 26 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:28,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:28,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:46:28,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:30,019 INFO L124 PetriNetUnfolderBase]: 5715/8522 cut-off events. [2023-11-29 03:46:30,019 INFO L125 PetriNetUnfolderBase]: For 16783/16783 co-relation queries the response was YES. [2023-11-29 03:46:30,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31160 conditions, 8522 events. 5715/8522 cut-off events. For 16783/16783 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 47817 event pairs, 605 based on Foata normal form. 2/8060 useless extension candidates. Maximal degree in co-relation 28427. Up to 5285 conditions per place. [2023-11-29 03:46:30,074 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 258 selfloop transitions, 213 changer transitions 1/475 dead transitions. [2023-11-29 03:46:30,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 475 transitions, 4114 flow [2023-11-29 03:46:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:46:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 03:46:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 397 transitions. [2023-11-29 03:46:30,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36589861751152075 [2023-11-29 03:46:30,077 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 397 transitions. [2023-11-29 03:46:30,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 397 transitions. [2023-11-29 03:46:30,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:30,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 397 transitions. [2023-11-29 03:46:30,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 12.806451612903226) internal successors, (397), 31 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 35.0) internal successors, (1120), 32 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,083 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 35.0) internal successors, (1120), 32 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,083 INFO L175 Difference]: Start difference. First operand has 98 places, 158 transitions, 1226 flow. Second operand 31 states and 397 transitions. [2023-11-29 03:46:30,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 475 transitions, 4114 flow [2023-11-29 03:46:30,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 475 transitions, 4017 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-11-29 03:46:30,174 INFO L231 Difference]: Finished difference. Result has 132 places, 331 transitions, 3271 flow [2023-11-29 03:46:30,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3271, PETRI_PLACES=132, PETRI_TRANSITIONS=331} [2023-11-29 03:46:30,175 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 95 predicate places. [2023-11-29 03:46:30,176 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 331 transitions, 3271 flow [2023-11-29 03:46:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.730769230769231) internal successors, (201), 26 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:30,176 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] [2023-11-29 03:46:30,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:46:30,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:30,383 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 1 more)] === [2023-11-29 03:46:30,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1998761010, now seen corresponding path program 5 times [2023-11-29 03:46:30,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:30,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597987932] [2023-11-29 03:46:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:30,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597987932] [2023-11-29 03:46:30,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597987932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:30,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754842155] [2023-11-29 03:46:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:46:30,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:30,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:30,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:30,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:46:31,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:46:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:31,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 03:46:31,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:31,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:46:31,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:46:31,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 75 [2023-11-29 03:46:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:31,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:33,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-11-29 03:46:33,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2023-11-29 03:46:33,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-29 03:46:33,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-11-29 03:46:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:33,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754842155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:33,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:33,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-11-29 03:46:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508393605] [2023-11-29 03:46:33,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:33,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 03:46:33,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:33,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 03:46:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:46:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:46:33,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 331 transitions, 3271 flow. Second operand has 30 states, 30 states have (on average 7.466666666666667) internal successors, (224), 30 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:33,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:46:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:43,000 INFO L124 PetriNetUnfolderBase]: 9712/13925 cut-off events. [2023-11-29 03:46:43,000 INFO L125 PetriNetUnfolderBase]: For 46045/46745 co-relation queries the response was YES. [2023-11-29 03:46:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59039 conditions, 13925 events. 9712/13925 cut-off events. For 46045/46745 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 77052 event pairs, 318 based on Foata normal form. 637/14531 useless extension candidates. Maximal degree in co-relation 58038. Up to 4643 conditions per place. [2023-11-29 03:46:43,102 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 345 selfloop transitions, 637 changer transitions 2/991 dead transitions. [2023-11-29 03:46:43,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 991 transitions, 9891 flow [2023-11-29 03:46:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 03:46:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-29 03:46:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 758 transitions. [2023-11-29 03:46:43,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39376623376623376 [2023-11-29 03:46:43,107 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 758 transitions. [2023-11-29 03:46:43,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 758 transitions. [2023-11-29 03:46:43,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:43,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 758 transitions. [2023-11-29 03:46:43,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 13.781818181818181) internal successors, (758), 55 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:43,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 35.0) internal successors, (1960), 56 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:43,114 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 35.0) internal successors, (1960), 56 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:43,114 INFO L175 Difference]: Start difference. First operand has 132 places, 331 transitions, 3271 flow. Second operand 55 states and 758 transitions. [2023-11-29 03:46:43,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 991 transitions, 9891 flow [2023-11-29 03:46:43,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 991 transitions, 9698 flow, removed 60 selfloop flow, removed 8 redundant places. [2023-11-29 03:46:43,405 INFO L231 Difference]: Finished difference. Result has 199 places, 708 transitions, 8941 flow [2023-11-29 03:46:43,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8941, PETRI_PLACES=199, PETRI_TRANSITIONS=708} [2023-11-29 03:46:43,406 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 162 predicate places. [2023-11-29 03:46:43,407 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 708 transitions, 8941 flow [2023-11-29 03:46:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.466666666666667) internal successors, (224), 30 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:43,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:43,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:43,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:46:43,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:43,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:46:43,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1065468815, now seen corresponding path program 6 times [2023-11-29 03:46:43,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:43,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048072006] [2023-11-29 03:46:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048072006] [2023-11-29 03:46:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048072006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:43,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730537461] [2023-11-29 03:46:43,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:46:43,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:43,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:43,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:43,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:46:43,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 03:46:43,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:43,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:46:43,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:44,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:44,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730537461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:44,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:44,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-11-29 03:46:44,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807080431] [2023-11-29 03:46:44,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:44,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:46:44,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:46:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:46:44,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:46:44,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 708 transitions, 8941 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:44,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:44,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:46:44,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:50,129 INFO L124 PetriNetUnfolderBase]: 15713/22449 cut-off events. [2023-11-29 03:46:50,129 INFO L125 PetriNetUnfolderBase]: For 179563/179563 co-relation queries the response was YES. [2023-11-29 03:46:50,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125568 conditions, 22449 events. 15713/22449 cut-off events. For 179563/179563 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 130756 event pairs, 1519 based on Foata normal form. 326/22639 useless extension candidates. Maximal degree in co-relation 124098. Up to 7251 conditions per place. [2023-11-29 03:46:50,390 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1362 selfloop transitions, 338 changer transitions 0/1701 dead transitions. [2023-11-29 03:46:50,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1701 transitions, 22985 flow [2023-11-29 03:46:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 03:46:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 03:46:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 478 transitions. [2023-11-29 03:46:50,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42678571428571427 [2023-11-29 03:46:50,394 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 478 transitions. [2023-11-29 03:46:50,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 478 transitions. [2023-11-29 03:46:50,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:50,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 478 transitions. [2023-11-29 03:46:50,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 14.9375) internal successors, (478), 32 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:50,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:50,401 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:50,401 INFO L175 Difference]: Start difference. First operand has 199 places, 708 transitions, 8941 flow. Second operand 32 states and 478 transitions. [2023-11-29 03:46:50,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1701 transitions, 22985 flow [2023-11-29 03:46:52,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1701 transitions, 20354 flow, removed 1150 selfloop flow, removed 12 redundant places. [2023-11-29 03:46:52,795 INFO L231 Difference]: Finished difference. Result has 236 places, 955 transitions, 11444 flow [2023-11-29 03:46:52,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8074, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11444, PETRI_PLACES=236, PETRI_TRANSITIONS=955} [2023-11-29 03:46:52,796 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 199 predicate places. [2023-11-29 03:46:52,797 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 955 transitions, 11444 flow [2023-11-29 03:46:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:52,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:52,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:52,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:46:52,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:46:52,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:46:52,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:52,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1773264067, now seen corresponding path program 7 times [2023-11-29 03:46:52,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:52,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587547210] [2023-11-29 03:46:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:52,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:53,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587547210] [2023-11-29 03:46:53,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587547210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:53,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310032424] [2023-11-29 03:46:53,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:46:53,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:53,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:53,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:53,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:46:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:53,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:46:53,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:53,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:53,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310032424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:53,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:53,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 03:46:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541430711] [2023-11-29 03:46:53,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:46:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:46:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:46:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:46:53,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 955 transitions, 11444 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:53,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:53,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:46:53,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:57,700 INFO L124 PetriNetUnfolderBase]: 10509/15869 cut-off events. [2023-11-29 03:46:57,700 INFO L125 PetriNetUnfolderBase]: For 184169/185627 co-relation queries the response was YES. [2023-11-29 03:46:57,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96837 conditions, 15869 events. 10509/15869 cut-off events. For 184169/185627 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 100576 event pairs, 2245 based on Foata normal form. 1130/16917 useless extension candidates. Maximal degree in co-relation 95636. Up to 6478 conditions per place. [2023-11-29 03:46:57,927 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 831 selfloop transitions, 78 changer transitions 0/964 dead transitions. [2023-11-29 03:46:57,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 964 transitions, 12986 flow [2023-11-29 03:46:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:46:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:46:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-29 03:46:57,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-29 03:46:57,929 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-29 03:46:57,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-29 03:46:57,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:57,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-29 03:46:57,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:57,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:57,931 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:57,931 INFO L175 Difference]: Start difference. First operand has 236 places, 955 transitions, 11444 flow. Second operand 7 states and 125 transitions. [2023-11-29 03:46:57,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 964 transitions, 12986 flow [2023-11-29 03:46:59,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 964 transitions, 12845 flow, removed 67 selfloop flow, removed 3 redundant places. [2023-11-29 03:46:59,787 INFO L231 Difference]: Finished difference. Result has 240 places, 839 transitions, 9977 flow [2023-11-29 03:46:59,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9725, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9977, PETRI_PLACES=240, PETRI_TRANSITIONS=839} [2023-11-29 03:46:59,789 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 203 predicate places. [2023-11-29 03:46:59,789 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 839 transitions, 9977 flow [2023-11-29 03:46:59,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:59,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:59,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:59,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:46:59,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:59,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:46:59,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1791889673, now seen corresponding path program 8 times [2023-11-29 03:46:59,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:59,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052598171] [2023-11-29 03:46:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052598171] [2023-11-29 03:47:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052598171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215432975] [2023-11-29 03:47:00,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:47:00,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:00,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:00,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:00,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:47:00,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:47:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:00,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:47:00,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:00,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:47:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215432975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:00,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 03:47:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031531122] [2023-11-29 03:47:00,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:47:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:47:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:47:00,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:47:00,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 839 transitions, 9977 flow. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:47:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:47:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:47:04,396 INFO L124 PetriNetUnfolderBase]: 8363/12640 cut-off events. [2023-11-29 03:47:04,396 INFO L125 PetriNetUnfolderBase]: For 148103/149054 co-relation queries the response was YES. [2023-11-29 03:47:04,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75719 conditions, 12640 events. 8363/12640 cut-off events. For 148103/149054 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 77718 event pairs, 1998 based on Foata normal form. 1092/13601 useless extension candidates. Maximal degree in co-relation 75621. Up to 6525 conditions per place. [2023-11-29 03:47:04,522 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 713 selfloop transitions, 42 changer transitions 11/800 dead transitions. [2023-11-29 03:47:04,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 800 transitions, 10661 flow [2023-11-29 03:47:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:47:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:47:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-29 03:47:04,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-29 03:47:04,524 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-29 03:47:04,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-29 03:47:04,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:47:04,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-29 03:47:04,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,525 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:04,525 INFO L175 Difference]: Start difference. First operand has 240 places, 839 transitions, 9977 flow. Second operand 7 states and 125 transitions. [2023-11-29 03:47:04,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 800 transitions, 10661 flow [2023-11-29 03:47:05,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 800 transitions, 10487 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-11-29 03:47:05,840 INFO L231 Difference]: Finished difference. Result has 231 places, 676 transitions, 7893 flow [2023-11-29 03:47:05,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7893, PETRI_PLACES=231, PETRI_TRANSITIONS=676} [2023-11-29 03:47:05,842 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 194 predicate places. [2023-11-29 03:47:05,842 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 676 transitions, 7893 flow [2023-11-29 03:47:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:47:05,842 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] [2023-11-29 03:47:05,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:47:06,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:47:06,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:47:06,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash 792888442, now seen corresponding path program 1 times [2023-11-29 03:47:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:06,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991674935] [2023-11-29 03:47:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:47:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991674935] [2023-11-29 03:47:06,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991674935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93643587] [2023-11-29 03:47:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:06,171 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:06,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:47:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:06,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:47:06,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:47:06,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:47:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93643587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:06,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-29 03:47:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450825310] [2023-11-29 03:47:06,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:47:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:47:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:47:06,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:47:06,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 676 transitions, 7893 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:06,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:47:06,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:47:06,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:47:09,167 INFO L124 PetriNetUnfolderBase]: 6318/9806 cut-off events. [2023-11-29 03:47:09,167 INFO L125 PetriNetUnfolderBase]: For 101171/101688 co-relation queries the response was YES. [2023-11-29 03:47:09,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57453 conditions, 9806 events. 6318/9806 cut-off events. For 101171/101688 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 59834 event pairs, 2132 based on Foata normal form. 340/10019 useless extension candidates. Maximal degree in co-relation 56539. Up to 6584 conditions per place. [2023-11-29 03:47:09,258 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 311 selfloop transitions, 3 changer transitions 198/572 dead transitions. [2023-11-29 03:47:09,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 572 transitions, 7559 flow [2023-11-29 03:47:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:47:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:47:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2023-11-29 03:47:09,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-29 03:47:09,259 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 102 transitions. [2023-11-29 03:47:09,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 102 transitions. [2023-11-29 03:47:09,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:47:09,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 102 transitions. [2023-11-29 03:47:09,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:09,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:09,261 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:09,261 INFO L175 Difference]: Start difference. First operand has 231 places, 676 transitions, 7893 flow. Second operand 6 states and 102 transitions. [2023-11-29 03:47:09,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 572 transitions, 7559 flow [2023-11-29 03:47:10,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 572 transitions, 7263 flow, removed 52 selfloop flow, removed 12 redundant places. [2023-11-29 03:47:10,159 INFO L231 Difference]: Finished difference. Result has 221 places, 374 transitions, 3816 flow [2023-11-29 03:47:10,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5148, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3816, PETRI_PLACES=221, PETRI_TRANSITIONS=374} [2023-11-29 03:47:10,160 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 184 predicate places. [2023-11-29 03:47:10,160 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 374 transitions, 3816 flow [2023-11-29 03:47:10,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:47:10,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:10,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:47:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:47:10,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:47:10,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1707695574, now seen corresponding path program 9 times [2023-11-29 03:47:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409249641] [2023-11-29 03:47:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:47:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409249641] [2023-11-29 03:47:10,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409249641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330399462] [2023-11-29 03:47:10,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:47:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:10,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:10,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:47:10,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:47:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:10,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:47:10,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:47:10,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:47:10,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330399462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:10,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:10,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 03:47:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926250356] [2023-11-29 03:47:10,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:47:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:47:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:47:10,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:47:10,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 374 transitions, 3816 flow. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:10,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:47:10,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:47:10,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:47:14,278 INFO L124 PetriNetUnfolderBase]: 9837/14220 cut-off events. [2023-11-29 03:47:14,279 INFO L125 PetriNetUnfolderBase]: For 126139/126646 co-relation queries the response was YES. [2023-11-29 03:47:14,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78926 conditions, 14220 events. 9837/14220 cut-off events. For 126139/126646 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 80291 event pairs, 771 based on Foata normal form. 228/14324 useless extension candidates. Maximal degree in co-relation 78861. Up to 5944 conditions per place. [2023-11-29 03:47:14,388 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 711 selfloop transitions, 249 changer transitions 0/984 dead transitions. [2023-11-29 03:47:14,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 984 transitions, 11533 flow [2023-11-29 03:47:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 03:47:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 03:47:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 257 transitions. [2023-11-29 03:47:14,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319327731092437 [2023-11-29 03:47:14,390 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 257 transitions. [2023-11-29 03:47:14,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 257 transitions. [2023-11-29 03:47:14,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:47:14,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 257 transitions. [2023-11-29 03:47:14,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:14,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:14,393 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:14,393 INFO L175 Difference]: Start difference. First operand has 221 places, 374 transitions, 3816 flow. Second operand 17 states and 257 transitions. [2023-11-29 03:47:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 984 transitions, 11533 flow [2023-11-29 03:47:15,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 984 transitions, 10587 flow, removed 336 selfloop flow, removed 23 redundant places. [2023-11-29 03:47:15,473 INFO L231 Difference]: Finished difference. Result has 166 places, 533 transitions, 5920 flow [2023-11-29 03:47:15,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5920, PETRI_PLACES=166, PETRI_TRANSITIONS=533} [2023-11-29 03:47:15,475 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 129 predicate places. [2023-11-29 03:47:15,475 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 533 transitions, 5920 flow [2023-11-29 03:47:15,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:15,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:47:15,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:15,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:47:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:47:15,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:47:15,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2051296322, now seen corresponding path program 10 times [2023-11-29 03:47:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:15,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314363913] [2023-11-29 03:47:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:47:15,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:15,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314363913] [2023-11-29 03:47:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314363913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137216922] [2023-11-29 03:47:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:47:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:15,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:15,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:47:15,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:47:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:15,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:47:15,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:16,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137216922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:16,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-29 03:47:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415191261] [2023-11-29 03:47:16,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:16,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:47:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:47:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:47:16,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:47:16,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 533 transitions, 5920 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:16,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:47:16,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:47:16,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:47:23,532 INFO L124 PetriNetUnfolderBase]: 17325/24551 cut-off events. [2023-11-29 03:47:23,532 INFO L125 PetriNetUnfolderBase]: For 185847/185847 co-relation queries the response was YES. [2023-11-29 03:47:23,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136004 conditions, 24551 events. 17325/24551 cut-off events. For 185847/185847 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 140403 event pairs, 623 based on Foata normal form. 32/24583 useless extension candidates. Maximal degree in co-relation 135948. Up to 9357 conditions per place. [2023-11-29 03:47:23,732 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1213 selfloop transitions, 804 changer transitions 0/2018 dead transitions. [2023-11-29 03:47:23,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 2018 transitions, 23871 flow [2023-11-29 03:47:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 03:47:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-11-29 03:47:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 925 transitions. [2023-11-29 03:47:23,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38865546218487396 [2023-11-29 03:47:23,736 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 925 transitions. [2023-11-29 03:47:23,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 925 transitions. [2023-11-29 03:47:23,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:47:23,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 925 transitions. [2023-11-29 03:47:23,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 13.602941176470589) internal successors, (925), 68 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:23,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 35.0) internal successors, (2415), 69 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:23,744 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 35.0) internal successors, (2415), 69 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:23,744 INFO L175 Difference]: Start difference. First operand has 166 places, 533 transitions, 5920 flow. Second operand 68 states and 925 transitions. [2023-11-29 03:47:23,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 2018 transitions, 23871 flow [2023-11-29 03:47:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 2018 transitions, 23678 flow, removed 93 selfloop flow, removed 4 redundant places. [2023-11-29 03:47:26,380 INFO L231 Difference]: Finished difference. Result has 250 places, 1077 transitions, 15142 flow [2023-11-29 03:47:26,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=15142, PETRI_PLACES=250, PETRI_TRANSITIONS=1077} [2023-11-29 03:47:26,381 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 213 predicate places. [2023-11-29 03:47:26,382 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 1077 transitions, 15142 flow [2023-11-29 03:47:26,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:26,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:47:26,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:26,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 03:47:26,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:47:26,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:47:26,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash 63524922, now seen corresponding path program 11 times [2023-11-29 03:47:26,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:26,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145042492] [2023-11-29 03:47:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:47:26,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145042492] [2023-11-29 03:47:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145042492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658247327] [2023-11-29 03:47:26,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:47:26,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:26,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:26,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:47:26,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:47:26,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:26,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:47:26,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:26,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658247327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:27,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:27,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-29 03:47:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902072207] [2023-11-29 03:47:27,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:27,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:47:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:47:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:47:27,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:47:27,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1077 transitions, 15142 flow. Second operand has 18 states, 18 states have (on average 6.888888888888889) internal successors, (124), 18 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:27,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:47:27,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:47:27,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:47:39,224 INFO L124 PetriNetUnfolderBase]: 21388/30312 cut-off events. [2023-11-29 03:47:39,225 INFO L125 PetriNetUnfolderBase]: For 420282/420282 co-relation queries the response was YES. [2023-11-29 03:47:39,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193348 conditions, 30312 events. 21388/30312 cut-off events. For 420282/420282 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 177771 event pairs, 780 based on Foata normal form. 34/30346 useless extension candidates. Maximal degree in co-relation 193271. Up to 11899 conditions per place. [2023-11-29 03:47:39,893 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1504 selfloop transitions, 1153 changer transitions 0/2658 dead transitions. [2023-11-29 03:47:39,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 2658 transitions, 35109 flow [2023-11-29 03:47:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-29 03:47:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-11-29 03:47:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1124 transitions. [2023-11-29 03:47:39,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373421926910299 [2023-11-29 03:47:39,898 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 1124 transitions. [2023-11-29 03:47:39,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 1124 transitions. [2023-11-29 03:47:39,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:47:39,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 1124 transitions. [2023-11-29 03:47:39,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 13.069767441860465) internal successors, (1124), 86 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:39,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 35.0) internal successors, (3045), 87 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:39,909 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 35.0) internal successors, (3045), 87 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:39,910 INFO L175 Difference]: Start difference. First operand has 250 places, 1077 transitions, 15142 flow. Second operand 86 states and 1124 transitions. [2023-11-29 03:47:39,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 2658 transitions, 35109 flow [2023-11-29 03:47:50,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 2658 transitions, 33424 flow, removed 756 selfloop flow, removed 6 redundant places. [2023-11-29 03:47:50,413 INFO L231 Difference]: Finished difference. Result has 344 places, 1394 transitions, 21271 flow [2023-11-29 03:47:50,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14148, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=842, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=21271, PETRI_PLACES=344, PETRI_TRANSITIONS=1394} [2023-11-29 03:47:50,415 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 307 predicate places. [2023-11-29 03:47:50,415 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1394 transitions, 21271 flow [2023-11-29 03:47:50,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.888888888888889) internal successors, (124), 18 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:50,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:47:50,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:47:50,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:47:50,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:47:50,616 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:47:50,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash -998565114, now seen corresponding path program 12 times [2023-11-29 03:47:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:50,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469301181] [2023-11-29 03:47:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:50,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:47:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469301181] [2023-11-29 03:47:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469301181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:47:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558122741] [2023-11-29 03:47:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:47:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:50,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:50,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:47:50,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 03:47:50,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:47:50,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:47:50,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:50,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:47:51,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558122741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:51,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:47:51,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-29 03:47:51,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158725026] [2023-11-29 03:47:51,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:47:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:47:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:47:51,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:47:51,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1394 transitions, 21271 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:51,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:47:51,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:47:51,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:48:05,889 INFO L124 PetriNetUnfolderBase]: 27901/39629 cut-off events. [2023-11-29 03:48:05,889 INFO L125 PetriNetUnfolderBase]: For 740429/740429 co-relation queries the response was YES. [2023-11-29 03:48:06,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270547 conditions, 39629 events. 27901/39629 cut-off events. For 740429/740429 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 239007 event pairs, 1179 based on Foata normal form. 32/39661 useless extension candidates. Maximal degree in co-relation 270456. Up to 15757 conditions per place. [2023-11-29 03:48:06,594 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 858 selfloop transitions, 1441 changer transitions 0/2300 dead transitions. [2023-11-29 03:48:06,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 2300 transitions, 37074 flow [2023-11-29 03:48:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 03:48:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 03:48:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 492 transitions. [2023-11-29 03:48:06,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699248120300752 [2023-11-29 03:48:06,598 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 492 transitions. [2023-11-29 03:48:06,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 492 transitions. [2023-11-29 03:48:06,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:48:06,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 492 transitions. [2023-11-29 03:48:06,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 12.947368421052632) internal successors, (492), 38 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:06,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:06,604 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:06,604 INFO L175 Difference]: Start difference. First operand has 344 places, 1394 transitions, 21271 flow. Second operand 38 states and 492 transitions. [2023-11-29 03:48:06,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 2300 transitions, 37074 flow [2023-11-29 03:48:26,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 2300 transitions, 35351 flow, removed 411 selfloop flow, removed 11 redundant places. [2023-11-29 03:48:26,302 INFO L231 Difference]: Finished difference. Result has 388 places, 1814 transitions, 31472 flow [2023-11-29 03:48:26,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=20002, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31472, PETRI_PLACES=388, PETRI_TRANSITIONS=1814} [2023-11-29 03:48:26,304 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 351 predicate places. [2023-11-29 03:48:26,304 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1814 transitions, 31472 flow [2023-11-29 03:48:26,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:26,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:48:26,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:26,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:48:26,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:48:26,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:48:26,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1824087188, now seen corresponding path program 13 times [2023-11-29 03:48:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:26,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218070746] [2023-11-29 03:48:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:48:26,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:26,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218070746] [2023-11-29 03:48:26,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218070746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:26,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318721265] [2023-11-29 03:48:26,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:48:26,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:26,652 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:26,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:48:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:26,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:48:26,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:48:26,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:48:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318721265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:27,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:27,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 03:48:27,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484298528] [2023-11-29 03:48:27,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 03:48:27,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 03:48:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:48:27,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:48:27,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1814 transitions, 31472 flow. Second operand has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:27,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:48:27,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:48:27,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:48:50,567 INFO L124 PetriNetUnfolderBase]: 34312/49060 cut-off events. [2023-11-29 03:48:50,567 INFO L125 PetriNetUnfolderBase]: For 1156799/1157885 co-relation queries the response was YES. [2023-11-29 03:48:51,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355793 conditions, 49060 events. 34312/49060 cut-off events. For 1156799/1157885 co-relation queries the response was YES. Maximal size of possible extension queue 1560. Compared 315147 event pairs, 1450 based on Foata normal form. 586/49358 useless extension candidates. Maximal degree in co-relation 355684. Up to 21753 conditions per place. [2023-11-29 03:48:51,764 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 1949 selfloop transitions, 1157 changer transitions 0/3130 dead transitions. [2023-11-29 03:48:51,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 3130 transitions, 54236 flow [2023-11-29 03:48:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 03:48:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 03:48:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 621 transitions. [2023-11-29 03:48:51,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47953667953667956 [2023-11-29 03:48:51,766 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 621 transitions. [2023-11-29 03:48:51,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 621 transitions. [2023-11-29 03:48:51,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:48:51,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 621 transitions. [2023-11-29 03:48:51,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 16.783783783783782) internal successors, (621), 37 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:51,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:51,771 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:51,771 INFO L175 Difference]: Start difference. First operand has 388 places, 1814 transitions, 31472 flow. Second operand 37 states and 621 transitions. [2023-11-29 03:48:51,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 3130 transitions, 54236 flow [2023-11-29 03:49:54,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 3130 transitions, 52651 flow, removed 523 selfloop flow, removed 10 redundant places. [2023-11-29 03:49:54,720 INFO L231 Difference]: Finished difference. Result has 421 places, 2124 transitions, 39575 flow [2023-11-29 03:49:54,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=30525, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=860, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=39575, PETRI_PLACES=421, PETRI_TRANSITIONS=2124} [2023-11-29 03:49:54,723 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 384 predicate places. [2023-11-29 03:49:54,723 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 2124 transitions, 39575 flow [2023-11-29 03:49:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:54,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:49:54,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:49:54,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:49:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:49:54,924 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:49:54,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:49:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 469009802, now seen corresponding path program 14 times [2023-11-29 03:49:54,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:49:54,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698312893] [2023-11-29 03:49:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:49:54,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:49:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:49:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:49:55,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:49:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698312893] [2023-11-29 03:49:55,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698312893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:49:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568145911] [2023-11-29 03:49:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:49:55,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:49:55,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:49:55,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:49:55,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:49:55,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:49:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:49:55,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:49:55,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:49:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:49:55,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:49:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:49:55,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568145911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:49:55,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:49:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 03:49:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855881584] [2023-11-29 03:49:55,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:49:55,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 03:49:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:49:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 03:49:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-29 03:49:55,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:49:55,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 2124 transitions, 39575 flow. Second operand has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:55,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:49:55,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:49:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:28,384 INFO L124 PetriNetUnfolderBase]: 42405/60363 cut-off events. [2023-11-29 03:50:28,384 INFO L125 PetriNetUnfolderBase]: For 1454102/1455450 co-relation queries the response was YES. [2023-11-29 03:50:29,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450342 conditions, 60363 events. 42405/60363 cut-off events. For 1454102/1455450 co-relation queries the response was YES. Maximal size of possible extension queue 1827. Compared 393529 event pairs, 791 based on Foata normal form. 813/60874 useless extension candidates. Maximal degree in co-relation 450226. Up to 26905 conditions per place. [2023-11-29 03:50:29,906 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 1784 selfloop transitions, 1572 changer transitions 0/3380 dead transitions. [2023-11-29 03:50:29,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 3380 transitions, 62577 flow [2023-11-29 03:50:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 03:50:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 03:50:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 716 transitions. [2023-11-29 03:50:29,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48707482993197276 [2023-11-29 03:50:29,910 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 716 transitions. [2023-11-29 03:50:29,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 716 transitions. [2023-11-29 03:50:29,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:29,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 716 transitions. [2023-11-29 03:50:29,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 17.047619047619047) internal successors, (716), 42 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:29,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 35.0) internal successors, (1505), 43 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:29,919 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 35.0) internal successors, (1505), 43 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:29,919 INFO L175 Difference]: Start difference. First operand has 421 places, 2124 transitions, 39575 flow. Second operand 42 states and 716 transitions. [2023-11-29 03:50:29,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 3380 transitions, 62577 flow [2023-11-29 03:51:46,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 3380 transitions, 58565 flow, removed 758 selfloop flow, removed 22 redundant places. [2023-11-29 03:51:46,825 INFO L231 Difference]: Finished difference. Result has 442 places, 2448 transitions, 46344 flow [2023-11-29 03:51:46,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=36699, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=46344, PETRI_PLACES=442, PETRI_TRANSITIONS=2448} [2023-11-29 03:51:46,828 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 405 predicate places. [2023-11-29 03:51:46,828 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 2448 transitions, 46344 flow [2023-11-29 03:51:46,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:46,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:51:46,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:51:46,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:51:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:51:47,029 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:51:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:51:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1279200658, now seen corresponding path program 15 times [2023-11-29 03:51:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:51:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119834414] [2023-11-29 03:51:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:51:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:51:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:51:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:51:47,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:51:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119834414] [2023-11-29 03:51:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119834414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:51:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494923209] [2023-11-29 03:51:47,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:51:47,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:51:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:51:47,164 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:51:47,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:51:47,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:51:47,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:51:47,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:51:47,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:51:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:51:47,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:51:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:51:47,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494923209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:51:47,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:51:47,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 03:51:47,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452072832] [2023-11-29 03:51:47,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:51:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:51:47,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:51:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:51:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:51:47,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:51:47,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 2448 transitions, 46344 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:47,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:51:47,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:51:47,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:52:22,980 INFO L124 PetriNetUnfolderBase]: 43542/62084 cut-off events. [2023-11-29 03:52:22,980 INFO L125 PetriNetUnfolderBase]: For 891916/893123 co-relation queries the response was YES. [2023-11-29 03:52:23,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429468 conditions, 62084 events. 43542/62084 cut-off events. For 891916/893123 co-relation queries the response was YES. Maximal size of possible extension queue 1883. Compared 408502 event pairs, 2738 based on Foata normal form. 693/62453 useless extension candidates. Maximal degree in co-relation 429361. Up to 27711 conditions per place. [2023-11-29 03:52:24,397 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 1377 selfloop transitions, 1656 changer transitions 0/3057 dead transitions. [2023-11-29 03:52:24,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 3057 transitions, 59279 flow [2023-11-29 03:52:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 03:52:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 03:52:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 275 transitions. [2023-11-29 03:52:24,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-11-29 03:52:24,399 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 275 transitions. [2023-11-29 03:52:24,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 275 transitions. [2023-11-29 03:52:24,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:52:24,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 275 transitions. [2023-11-29 03:52:24,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:24,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:24,402 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:24,403 INFO L175 Difference]: Start difference. First operand has 442 places, 2448 transitions, 46344 flow. Second operand 18 states and 275 transitions. [2023-11-29 03:52:24,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 3057 transitions, 59279 flow [2023-11-29 03:53:10,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 3057 transitions, 57307 flow, removed 193 selfloop flow, removed 15 redundant places. [2023-11-29 03:53:10,150 INFO L231 Difference]: Finished difference. Result has 448 places, 2552 transitions, 52059 flow [2023-11-29 03:53:10,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=44535, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=52059, PETRI_PLACES=448, PETRI_TRANSITIONS=2552} [2023-11-29 03:53:10,153 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 411 predicate places. [2023-11-29 03:53:10,153 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 2552 transitions, 52059 flow [2023-11-29 03:53:10,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:10,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:53:10,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:53:10,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 03:53:10,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:10,355 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:53:10,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:53:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash -353925620, now seen corresponding path program 16 times [2023-11-29 03:53:10,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:53:10,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577144421] [2023-11-29 03:53:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:53:10,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:53:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:53:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:53:10,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:53:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577144421] [2023-11-29 03:53:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577144421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:53:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952688218] [2023-11-29 03:53:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:53:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:53:10,505 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:53:10,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:53:10,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:53:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:53:10,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:53:10,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:53:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:53:10,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:53:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:53:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952688218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:53:10,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:53:10,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-29 03:53:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971908553] [2023-11-29 03:53:10,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:53:10,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:53:10,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:53:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:53:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:53:10,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:53:10,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 2552 transitions, 52059 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:10,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:53:10,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:53:10,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:53:54,343 INFO L124 PetriNetUnfolderBase]: 48346/68003 cut-off events. [2023-11-29 03:53:54,344 INFO L125 PetriNetUnfolderBase]: For 1083149/1083149 co-relation queries the response was YES. [2023-11-29 03:53:55,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485627 conditions, 68003 events. 48346/68003 cut-off events. For 1083149/1083149 co-relation queries the response was YES. Maximal size of possible extension queue 1874. Compared 431673 event pairs, 1864 based on Foata normal form. 34/68037 useless extension candidates. Maximal degree in co-relation 485520. Up to 27509 conditions per place. [2023-11-29 03:53:55,866 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1476 selfloop transitions, 2488 changer transitions 0/3965 dead transitions. [2023-11-29 03:53:55,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 3965 transitions, 73061 flow [2023-11-29 03:53:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 03:53:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-29 03:53:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 961 transitions. [2023-11-29 03:53:55,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38672032193158956 [2023-11-29 03:53:55,869 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 961 transitions. [2023-11-29 03:53:55,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 961 transitions. [2023-11-29 03:53:55,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:53:55,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 961 transitions. [2023-11-29 03:53:55,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 13.535211267605634) internal successors, (961), 71 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:55,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 35.0) internal successors, (2520), 72 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:55,876 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 35.0) internal successors, (2520), 72 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:55,876 INFO L175 Difference]: Start difference. First operand has 448 places, 2552 transitions, 52059 flow. Second operand 71 states and 961 transitions. [2023-11-29 03:53:55,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 3965 transitions, 73061 flow [2023-11-29 03:54:45,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 3965 transitions, 72894 flow, removed 80 selfloop flow, removed 4 redundant places. [2023-11-29 03:54:45,854 INFO L231 Difference]: Finished difference. Result has 526 places, 2775 transitions, 61581 flow [2023-11-29 03:54:45,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=51914, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=61581, PETRI_PLACES=526, PETRI_TRANSITIONS=2775} [2023-11-29 03:54:45,857 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 489 predicate places. [2023-11-29 03:54:45,857 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 2775 transitions, 61581 flow [2023-11-29 03:54:45,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:45,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:54:45,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:45,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 03:54:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 03:54:46,058 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:54:46,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1782886900, now seen corresponding path program 17 times [2023-11-29 03:54:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:46,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378492857] [2023-11-29 03:54:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:54:46,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378492857] [2023-11-29 03:54:46,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378492857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:46,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340520414] [2023-11-29 03:54:46,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:54:46,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:46,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:46,229 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:46,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:54:46,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:54:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:46,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:54:46,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:54:46,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:54:46,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340520414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:54:46,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:54:46,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-29 03:54:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835529551] [2023-11-29 03:54:46,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:46,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:54:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:54:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:54:46,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:54:46,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 2775 transitions, 61581 flow. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:46,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:54:46,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:54:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:55:34,832 INFO L124 PetriNetUnfolderBase]: 49559/69703 cut-off events. [2023-11-29 03:55:34,832 INFO L125 PetriNetUnfolderBase]: For 1353034/1353034 co-relation queries the response was YES. [2023-11-29 03:55:36,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534520 conditions, 69703 events. 49559/69703 cut-off events. For 1353034/1353034 co-relation queries the response was YES. Maximal size of possible extension queue 1915. Compared 444709 event pairs, 2433 based on Foata normal form. 32/69735 useless extension candidates. Maximal degree in co-relation 534401. Up to 28173 conditions per place. [2023-11-29 03:55:36,664 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1562 selfloop transitions, 2119 changer transitions 0/3682 dead transitions. [2023-11-29 03:55:36,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 3682 transitions, 77292 flow [2023-11-29 03:55:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 03:55:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 03:55:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 648 transitions. [2023-11-29 03:55:36,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939209726443769 [2023-11-29 03:55:36,667 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 648 transitions. [2023-11-29 03:55:36,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 648 transitions. [2023-11-29 03:55:36,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:55:36,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 648 transitions. [2023-11-29 03:55:36,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 13.787234042553191) internal successors, (648), 47 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:36,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:36,672 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:36,672 INFO L175 Difference]: Start difference. First operand has 526 places, 2775 transitions, 61581 flow. Second operand 47 states and 648 transitions. [2023-11-29 03:55:36,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 3682 transitions, 77292 flow [2023-11-29 03:56:42,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 3682 transitions, 74980 flow, removed 357 selfloop flow, removed 17 redundant places. [2023-11-29 03:56:42,786 INFO L231 Difference]: Finished difference. Result has 564 places, 2883 transitions, 66994 flow [2023-11-29 03:56:42,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=59147, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2003, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=66994, PETRI_PLACES=564, PETRI_TRANSITIONS=2883} [2023-11-29 03:56:42,789 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 527 predicate places. [2023-11-29 03:56:42,789 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 2883 transitions, 66994 flow [2023-11-29 03:56:42,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:42,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:56:42,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:42,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:56:42,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:42,990 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:56:42,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1585369018, now seen corresponding path program 2 times [2023-11-29 03:56:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:42,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038639815] [2023-11-29 03:56:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:42,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:56:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:56:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038639815] [2023-11-29 03:56:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038639815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:56:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176270615] [2023-11-29 03:56:45,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:56:45,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:56:45,159 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:56:45,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:56:45,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:56:45,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:56:45,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 03:56:45,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:46,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:56:46,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 85 [2023-11-29 03:56:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:56:47,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:48,534 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 03:56:48,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 161 [2023-11-29 03:56:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:56:49,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176270615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:49,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:49,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2023-11-29 03:56:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343098213] [2023-11-29 03:56:49,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:49,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 03:56:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 03:56:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 03:56:50,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:56:50,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 2883 transitions, 66994 flow. Second operand has 43 states, 43 states have (on average 7.116279069767442) internal successors, (306), 43 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:50,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:56:50,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:56:50,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:57:47,721 INFO L124 PetriNetUnfolderBase]: 56600/81808 cut-off events. [2023-11-29 03:57:47,721 INFO L125 PetriNetUnfolderBase]: For 1518825/1521884 co-relation queries the response was YES. [2023-11-29 03:57:48,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636667 conditions, 81808 events. 56600/81808 cut-off events. For 1518825/1521884 co-relation queries the response was YES. Maximal size of possible extension queue 2351. Compared 567993 event pairs, 3863 based on Foata normal form. 446/81801 useless extension candidates. Maximal degree in co-relation 636543. Up to 64657 conditions per place. [2023-11-29 03:57:49,392 INFO L140 encePairwiseOnDemand]: 17/35 looper letters, 3600 selfloop transitions, 1410 changer transitions 3/5333 dead transitions. [2023-11-29 03:57:49,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 5333 transitions, 114216 flow [2023-11-29 03:57:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-29 03:57:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-11-29 03:57:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 1512 transitions. [2023-11-29 03:57:49,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891891891891892 [2023-11-29 03:57:49,396 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 1512 transitions. [2023-11-29 03:57:49,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 1512 transitions. [2023-11-29 03:57:49,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:57:49,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 1512 transitions. [2023-11-29 03:57:49,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 13.621621621621621) internal successors, (1512), 111 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:49,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 35.0) internal successors, (3920), 112 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:49,407 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 35.0) internal successors, (3920), 112 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:49,407 INFO L175 Difference]: Start difference. First operand has 564 places, 2883 transitions, 66994 flow. Second operand 111 states and 1512 transitions. [2023-11-29 03:57:49,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 5333 transitions, 114216 flow [2023-11-29 03:59:11,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 666 places, 5333 transitions, 112105 flow, removed 335 selfloop flow, removed 8 redundant places. [2023-11-29 03:59:11,248 INFO L231 Difference]: Finished difference. Result has 705 places, 4214 transitions, 90720 flow [2023-11-29 03:59:11,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=65781, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=90720, PETRI_PLACES=705, PETRI_TRANSITIONS=4214} [2023-11-29 03:59:11,251 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 668 predicate places. [2023-11-29 03:59:11,251 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 4214 transitions, 90720 flow [2023-11-29 03:59:11,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.116279069767442) internal successors, (306), 43 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:59:11,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:59:11,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:59:11,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:59:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:11,452 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:59:11,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:59:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1389378334, now seen corresponding path program 3 times [2023-11-29 03:59:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:59:11,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98753836] [2023-11-29 03:59:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:59:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:59:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:59:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:59:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:59:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98753836] [2023-11-29 03:59:12,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98753836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:59:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128120588] [2023-11-29 03:59:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:59:12,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:59:12,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:59:12,763 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:59:12,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7b2f6d5-563f-44c3-bbd5-6f02573923a7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:59:12,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 03:59:12,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:59:12,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 03:59:12,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:59:12,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:59:14,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:59:14,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 185 treesize of output 179