./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:03:16,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:03:16,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:03:16,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:03:16,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:03:16,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:03:16,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:03:16,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:03:16,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:03:16,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:03:16,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:03:16,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:03:16,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:03:16,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:03:16,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:03:16,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:03:16,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:03:16,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:03:16,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:03:16,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:03:16,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:03:16,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:03:16,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:03:16,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:03:16,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:03:16,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:03:16,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:03:16,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:03:16,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:03:16,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:03:16,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:03:16,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:03:16,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:03:16,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:03:16,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:03:16,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:03:16,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:03:16,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:03:16,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:03:16,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:03:16,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:03:16,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:03:16,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:03:16,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:03:16,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:03:16,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:03:16,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:03:16,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:03:16,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:03:16,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:03:16,984 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:03:16,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:03:16,984 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:03:16,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:03:16,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:03:16,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:03:16,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:03:16,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:03:16,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:03:16,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:03:16,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:03:16,987 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:03:16,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:03:16,987 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:03:16,987 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-12-13 16:03:17,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:03:17,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:03:17,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:03:17,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:03:17,174 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:03:17,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-12-13 16:03:19,629 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:03:19,779 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:03:19,780 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-12-13 16:03:19,784 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/data/1f773baf3/315959b561e2454c81e3a476b7c5990c/FLAG42d72b4e2 [2022-12-13 16:03:20,208 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/data/1f773baf3/315959b561e2454c81e3a476b7c5990c [2022-12-13 16:03:20,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:03:20,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:03:20,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:03:20,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:03:20,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:03:20,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5a087d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20, skipping insertion in model container [2022-12-13 16:03:20,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:03:20,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:03:20,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:03:20,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:03:20,340 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:03:20,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:03:20,346 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-12-13 16:03:20,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:03:20,356 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:03:20,366 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:03:20,366 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:03:20,367 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:03:20,367 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:03:20,370 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-12-13 16:03:20,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:03:20,381 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:03:20,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20 WrapperNode [2022-12-13 16:03:20,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:03:20,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:03:20,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:03:20,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:03:20,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,405 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-12-13 16:03:20,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:03:20,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:03:20,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:03:20,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:03:20,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,420 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:03:20,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:03:20,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:03:20,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:03:20,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (1/1) ... [2022-12-13 16:03:20,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:03:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:20,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:03:20,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:03:20,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:03:20,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:03:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:03:20,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:03:20,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:03:20,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:03:20,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:03:20,476 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:03:20,546 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:03:20,547 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:03:20,678 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:03:20,713 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:03:20,713 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:03:20,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:03:20 BoogieIcfgContainer [2022-12-13 16:03:20,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:03:20,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:03:20,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:03:20,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:03:20,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:03:20" (1/3) ... [2022-12-13 16:03:20,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cef0078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:03:20, skipping insertion in model container [2022-12-13 16:03:20,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:03:20" (2/3) ... [2022-12-13 16:03:20,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cef0078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:03:20, skipping insertion in model container [2022-12-13 16:03:20,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:03:20" (3/3) ... [2022-12-13 16:03:20,724 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-12-13 16:03:20,733 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:03:20,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:03:20,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:03:20,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:03:20,789 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:03:20,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-12-13 16:03:20,863 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-12-13 16:03:20,863 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:03:20,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-12-13 16:03:20,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-12-13 16:03:20,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-12-13 16:03:20,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:03:20,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 162 flow [2022-12-13 16:03:20,887 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 162 flow [2022-12-13 16:03:20,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 162 flow [2022-12-13 16:03:20,914 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-12-13 16:03:20,914 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:03:20,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-12-13 16:03:20,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2022-12-13 16:03:22,556 INFO L134 LiptonReduction]: Checked pairs total: 473 [2022-12-13 16:03:22,556 INFO L136 LiptonReduction]: Total number of compositions: 70 [2022-12-13 16:03:22,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:03:22,570 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e212d94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:03:22,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 16:03:22,574 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 16:03:22,574 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:03:22,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:22,574 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:22,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash -765638587, now seen corresponding path program 1 times [2022-12-13 16:03:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:22,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359544831] [2022-12-13 16:03:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:22,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:22,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359544831] [2022-12-13 16:03:22,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359544831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:03:22,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:03:22,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:03:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481293729] [2022-12-13 16:03:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:03:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:03:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:03:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:03:22,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 156 [2022-12-13 16:03:22,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:22,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:22,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 156 [2022-12-13 16:03:22,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:22,985 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2022-12-13 16:03:22,985 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:03:22,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 95 events. 54/95 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 239 event pairs, 10 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 160. Up to 73 conditions per place. [2022-12-13 16:03:22,986 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-12-13 16:03:22,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2022-12-13 16:03:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:03:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:03:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2022-12-13 16:03:23,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46955128205128205 [2022-12-13 16:03:23,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 293 transitions. [2022-12-13 16:03:23,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 293 transitions. [2022-12-13 16:03:23,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:23,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 293 transitions. [2022-12-13 16:03:23,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,012 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 293 transitions. [2022-12-13 16:03:23,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2022-12-13 16:03:23,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 16:03:23,015 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2022-12-13 16:03:23,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-13 16:03:23,020 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2022-12-13 16:03:23,020 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2022-12-13 16:03:23,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:23,020 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:23,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:03:23,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash -773713613, now seen corresponding path program 1 times [2022-12-13 16:03:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:23,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300144445] [2022-12-13 16:03:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300144445] [2022-12-13 16:03:23,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300144445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:03:23,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:03:23,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:03:23,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965908599] [2022-12-13 16:03:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:03:23,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:03:23,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:03:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:03:23,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 156 [2022-12-13 16:03:23,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:23,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 156 [2022-12-13 16:03:23,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:23,222 INFO L130 PetriNetUnfolder]: 51/93 cut-off events. [2022-12-13 16:03:23,222 INFO L131 PetriNetUnfolder]: For 22/31 co-relation queries the response was YES. [2022-12-13 16:03:23,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 93 events. 51/93 cut-off events. For 22/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 154. Up to 73 conditions per place. [2022-12-13 16:03:23,223 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2022-12-13 16:03:23,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2022-12-13 16:03:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:03:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:03:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 297 transitions. [2022-12-13 16:03:23,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2022-12-13 16:03:23,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 297 transitions. [2022-12-13 16:03:23,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 297 transitions. [2022-12-13 16:03:23,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:23,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 297 transitions. [2022-12-13 16:03:23,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,230 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 297 transitions. [2022-12-13 16:03:23,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2022-12-13 16:03:23,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 16:03:23,232 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2022-12-13 16:03:23,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-12-13 16:03:23,232 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2022-12-13 16:03:23,233 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2022-12-13 16:03:23,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:23,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:23,233 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:23,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:03:23,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:23,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1236683274, now seen corresponding path program 1 times [2022-12-13 16:03:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:23,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416323897] [2022-12-13 16:03:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:23,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:23,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416323897] [2022-12-13 16:03:23,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416323897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371521453] [2022-12-13 16:03:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:23,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:23,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:03:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:23,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:23,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:23,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371521453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:23,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:23,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 16:03:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453746224] [2022-12-13 16:03:23,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:23,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:03:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:03:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:03:24,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:24,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 20 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:24,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:24,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:24,621 INFO L130 PetriNetUnfolder]: 167/315 cut-off events. [2022-12-13 16:03:24,621 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-12-13 16:03:24,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 315 events. 167/315 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1199 event pairs, 5 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 238. Up to 109 conditions per place. [2022-12-13 16:03:24,624 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 53 selfloop transitions, 26 changer transitions 39/118 dead transitions. [2022-12-13 16:03:24,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 118 transitions, 612 flow [2022-12-13 16:03:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 16:03:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 16:03:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1250 transitions. [2022-12-13 16:03:24,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44515669515669515 [2022-12-13 16:03:24,626 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1250 transitions. [2022-12-13 16:03:24,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1250 transitions. [2022-12-13 16:03:24,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:24,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1250 transitions. [2022-12-13 16:03:24,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.44444444444444) internal successors, (1250), 18 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 156.0) internal successors, (2964), 19 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,635 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 156.0) internal successors, (2964), 19 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,635 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 18 states and 1250 transitions. [2022-12-13 16:03:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 118 transitions, 612 flow [2022-12-13 16:03:24,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 118 transitions, 580 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 16:03:24,638 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 249 flow [2022-12-13 16:03:24,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=249, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2022-12-13 16:03:24,639 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2022-12-13 16:03:24,639 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 249 flow [2022-12-13 16:03:24,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:24,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:24,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:24,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:24,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1599733994, now seen corresponding path program 2 times [2022-12-13 16:03:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:24,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877978945] [2022-12-13 16:03:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:24,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:25,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877978945] [2022-12-13 16:03:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877978945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41065350] [2022-12-13 16:03:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:03:25,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:25,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:25,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:03:25,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:03:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:25,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:25,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41065350] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:25,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:25,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 16:03:25,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779218187] [2022-12-13 16:03:25,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:25,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:03:25,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:03:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:03:25,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:25,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 249 flow. Second operand has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:25,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:25,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:25,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:26,700 INFO L130 PetriNetUnfolder]: 305/594 cut-off events. [2022-12-13 16:03:26,700 INFO L131 PetriNetUnfolder]: For 1471/1471 co-relation queries the response was YES. [2022-12-13 16:03:26,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 594 events. 305/594 cut-off events. For 1471/1471 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2784 event pairs, 21 based on Foata normal form. 9/599 useless extension candidates. Maximal degree in co-relation 2302. Up to 228 conditions per place. [2022-12-13 16:03:26,705 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 99 selfloop transitions, 42 changer transitions 69/210 dead transitions. [2022-12-13 16:03:26,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 210 transitions, 1511 flow [2022-12-13 16:03:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:03:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 16:03:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2525 transitions. [2022-12-13 16:03:26,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4374566874566875 [2022-12-13 16:03:26,709 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2525 transitions. [2022-12-13 16:03:26,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2525 transitions. [2022-12-13 16:03:26,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:26,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2525 transitions. [2022-12-13 16:03:26,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 68.24324324324324) internal successors, (2525), 37 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:26,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 156.0) internal successors, (5928), 38 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:26,721 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 156.0) internal successors, (5928), 38 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:26,721 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 249 flow. Second operand 37 states and 2525 transitions. [2022-12-13 16:03:26,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 210 transitions, 1511 flow [2022-12-13 16:03:26,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 210 transitions, 1324 flow, removed 88 selfloop flow, removed 5 redundant places. [2022-12-13 16:03:26,729 INFO L231 Difference]: Finished difference. Result has 100 places, 76 transitions, 627 flow [2022-12-13 16:03:26,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=627, PETRI_PLACES=100, PETRI_TRANSITIONS=76} [2022-12-13 16:03:26,730 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-12-13 16:03:26,730 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 76 transitions, 627 flow [2022-12-13 16:03:26,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:26,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:26,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:26,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:03:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:26,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1465070478, now seen corresponding path program 3 times [2022-12-13 16:03:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733919220] [2022-12-13 16:03:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:27,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733919220] [2022-12-13 16:03:27,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733919220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:27,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795908175] [2022-12-13 16:03:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:03:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:27,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:27,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:03:27,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:03:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:27,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:27,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795908175] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:27,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:27,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 16:03:27,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884446050] [2022-12-13 16:03:27,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:27,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:03:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:03:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:03:27,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:27,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 76 transitions, 627 flow. Second operand has 20 states, 20 states have (on average 64.8) internal successors, (1296), 20 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:27,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:27,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:27,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:28,272 INFO L130 PetriNetUnfolder]: 283/559 cut-off events. [2022-12-13 16:03:28,273 INFO L131 PetriNetUnfolder]: For 5644/5644 co-relation queries the response was YES. [2022-12-13 16:03:28,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 559 events. 283/559 cut-off events. For 5644/5644 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2638 event pairs, 21 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 2815. Up to 155 conditions per place. [2022-12-13 16:03:28,279 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 74 selfloop transitions, 51 changer transitions 43/168 dead transitions. [2022-12-13 16:03:28,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 1565 flow [2022-12-13 16:03:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:03:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:03:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1451 transitions. [2022-12-13 16:03:28,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4429181929181929 [2022-12-13 16:03:28,282 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1451 transitions. [2022-12-13 16:03:28,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1451 transitions. [2022-12-13 16:03:28,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:28,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1451 transitions. [2022-12-13 16:03:28,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 69.0952380952381) internal successors, (1451), 21 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:28,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 156.0) internal successors, (3432), 22 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:28,288 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 156.0) internal successors, (3432), 22 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:28,288 INFO L175 Difference]: Start difference. First operand has 100 places, 76 transitions, 627 flow. Second operand 21 states and 1451 transitions. [2022-12-13 16:03:28,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 1565 flow [2022-12-13 16:03:28,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1302 flow, removed 129 selfloop flow, removed 13 redundant places. [2022-12-13 16:03:28,304 INFO L231 Difference]: Finished difference. Result has 107 places, 82 transitions, 690 flow [2022-12-13 16:03:28,304 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=690, PETRI_PLACES=107, PETRI_TRANSITIONS=82} [2022-12-13 16:03:28,304 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2022-12-13 16:03:28,304 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 82 transitions, 690 flow [2022-12-13 16:03:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.8) internal successors, (1296), 20 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:28,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:28,305 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:28,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:03:28,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:28,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:28,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1141564774, now seen corresponding path program 4 times [2022-12-13 16:03:28,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:28,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026285470] [2022-12-13 16:03:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026285470] [2022-12-13 16:03:28,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026285470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524508918] [2022-12-13 16:03:28,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:03:28,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:28,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:28,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:28,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:03:28,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:03:28,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:28,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:29,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524508918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:29,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:29,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 16:03:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39958161] [2022-12-13 16:03:29,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:03:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:03:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:03:29,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:29,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 82 transitions, 690 flow. Second operand has 20 states, 20 states have (on average 64.8) internal successors, (1296), 20 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:29,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:29,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:29,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:29,750 INFO L130 PetriNetUnfolder]: 288/584 cut-off events. [2022-12-13 16:03:29,750 INFO L131 PetriNetUnfolder]: For 4084/4084 co-relation queries the response was YES. [2022-12-13 16:03:29,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 584 events. 288/584 cut-off events. For 4084/4084 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2845 event pairs, 13 based on Foata normal form. 2/584 useless extension candidates. Maximal degree in co-relation 2808. Up to 151 conditions per place. [2022-12-13 16:03:29,753 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 91 selfloop transitions, 62 changer transitions 22/175 dead transitions. [2022-12-13 16:03:29,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 175 transitions, 1635 flow [2022-12-13 16:03:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:03:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 16:03:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1521 transitions. [2022-12-13 16:03:29,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2022-12-13 16:03:29,756 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1521 transitions. [2022-12-13 16:03:29,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1521 transitions. [2022-12-13 16:03:29,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:29,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1521 transitions. [2022-12-13 16:03:29,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 69.13636363636364) internal successors, (1521), 22 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:29,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 156.0) internal successors, (3588), 23 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:29,762 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 156.0) internal successors, (3588), 23 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:29,762 INFO L175 Difference]: Start difference. First operand has 107 places, 82 transitions, 690 flow. Second operand 22 states and 1521 transitions. [2022-12-13 16:03:29,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 175 transitions, 1635 flow [2022-12-13 16:03:29,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 175 transitions, 1423 flow, removed 65 selfloop flow, removed 13 redundant places. [2022-12-13 16:03:29,771 INFO L231 Difference]: Finished difference. Result has 117 places, 93 transitions, 850 flow [2022-12-13 16:03:29,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=850, PETRI_PLACES=117, PETRI_TRANSITIONS=93} [2022-12-13 16:03:29,772 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2022-12-13 16:03:29,772 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 93 transitions, 850 flow [2022-12-13 16:03:29,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.8) internal successors, (1296), 20 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:29,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:29,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:29,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:03:29,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 16:03:29,973 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash -910870722, now seen corresponding path program 5 times [2022-12-13 16:03:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:29,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609972631] [2022-12-13 16:03:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:30,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609972631] [2022-12-13 16:03:30,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609972631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731689999] [2022-12-13 16:03:30,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:03:30,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:30,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:30,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:03:30,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:03:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:03:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:30,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:30,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731689999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:30,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 16:03:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939273715] [2022-12-13 16:03:30,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:03:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:03:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:03:30,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:30,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 93 transitions, 850 flow. Second operand has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:30,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:30,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:30,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:31,070 INFO L130 PetriNetUnfolder]: 270/560 cut-off events. [2022-12-13 16:03:31,071 INFO L131 PetriNetUnfolder]: For 3562/3562 co-relation queries the response was YES. [2022-12-13 16:03:31,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 560 events. 270/560 cut-off events. For 3562/3562 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2724 event pairs, 19 based on Foata normal form. 1/559 useless extension candidates. Maximal degree in co-relation 2706. Up to 286 conditions per place. [2022-12-13 16:03:31,074 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 81 selfloop transitions, 50 changer transitions 20/151 dead transitions. [2022-12-13 16:03:31,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 151 transitions, 1465 flow [2022-12-13 16:03:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:03:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 16:03:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1166 transitions. [2022-12-13 16:03:31,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4396681749622926 [2022-12-13 16:03:31,076 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1166 transitions. [2022-12-13 16:03:31,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1166 transitions. [2022-12-13 16:03:31,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:31,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1166 transitions. [2022-12-13 16:03:31,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 68.58823529411765) internal successors, (1166), 17 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:31,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 156.0) internal successors, (2808), 18 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:31,080 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 156.0) internal successors, (2808), 18 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:31,080 INFO L175 Difference]: Start difference. First operand has 117 places, 93 transitions, 850 flow. Second operand 17 states and 1166 transitions. [2022-12-13 16:03:31,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 151 transitions, 1465 flow [2022-12-13 16:03:31,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1266 flow, removed 43 selfloop flow, removed 13 redundant places. [2022-12-13 16:03:31,092 INFO L231 Difference]: Finished difference. Result has 125 places, 98 transitions, 870 flow [2022-12-13 16:03:31,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=870, PETRI_PLACES=125, PETRI_TRANSITIONS=98} [2022-12-13 16:03:31,093 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2022-12-13 16:03:31,093 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 98 transitions, 870 flow [2022-12-13 16:03:31,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:31,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:31,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:31,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:03:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:03:31,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash -529274390, now seen corresponding path program 6 times [2022-12-13 16:03:31,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:31,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017546736] [2022-12-13 16:03:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:31,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017546736] [2022-12-13 16:03:31,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017546736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270782616] [2022-12-13 16:03:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:03:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:31,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:31,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:03:31,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 16:03:31,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:31,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:31,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270782616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:31,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:31,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 16:03:31,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929908842] [2022-12-13 16:03:31,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:31,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:03:31,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:31,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:03:31,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:03:31,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:31,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 98 transitions, 870 flow. Second operand has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:31,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:31,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:31,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:33,139 INFO L130 PetriNetUnfolder]: 361/750 cut-off events. [2022-12-13 16:03:33,139 INFO L131 PetriNetUnfolder]: For 6909/6909 co-relation queries the response was YES. [2022-12-13 16:03:33,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 750 events. 361/750 cut-off events. For 6909/6909 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4024 event pairs, 31 based on Foata normal form. 9/757 useless extension candidates. Maximal degree in co-relation 3918. Up to 275 conditions per place. [2022-12-13 16:03:33,145 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 129 selfloop transitions, 66 changer transitions 70/265 dead transitions. [2022-12-13 16:03:33,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 265 transitions, 2557 flow [2022-12-13 16:03:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 16:03:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 16:03:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2863 transitions. [2022-12-13 16:03:33,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43696581196581197 [2022-12-13 16:03:33,148 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2863 transitions. [2022-12-13 16:03:33,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2863 transitions. [2022-12-13 16:03:33,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:33,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2863 transitions. [2022-12-13 16:03:33,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 68.16666666666667) internal successors, (2863), 42 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 156.0) internal successors, (6708), 43 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,157 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 156.0) internal successors, (6708), 43 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,157 INFO L175 Difference]: Start difference. First operand has 125 places, 98 transitions, 870 flow. Second operand 42 states and 2863 transitions. [2022-12-13 16:03:33,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 265 transitions, 2557 flow [2022-12-13 16:03:33,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 265 transitions, 2406 flow, removed 33 selfloop flow, removed 9 redundant places. [2022-12-13 16:03:33,174 INFO L231 Difference]: Finished difference. Result has 172 places, 114 transitions, 1213 flow [2022-12-13 16:03:33,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1213, PETRI_PLACES=172, PETRI_TRANSITIONS=114} [2022-12-13 16:03:33,175 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2022-12-13 16:03:33,175 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 114 transitions, 1213 flow [2022-12-13 16:03:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:33,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:33,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:03:33,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:33,377 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1206413034, now seen corresponding path program 7 times [2022-12-13 16:03:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:33,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405574777] [2022-12-13 16:03:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:33,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:33,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405574777] [2022-12-13 16:03:33,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405574777] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:33,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652100928] [2022-12-13 16:03:33,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:03:33,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:33,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:33,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:33,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:03:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:03:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:33,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:33,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652100928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:33,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:33,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-12-13 16:03:33,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187329858] [2022-12-13 16:03:33,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:33,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:03:33,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:03:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:03:33,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 156 [2022-12-13 16:03:33,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 114 transitions, 1213 flow. Second operand has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:33,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 156 [2022-12-13 16:03:33,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:33,677 INFO L130 PetriNetUnfolder]: 253/517 cut-off events. [2022-12-13 16:03:33,677 INFO L131 PetriNetUnfolder]: For 11138/11142 co-relation queries the response was YES. [2022-12-13 16:03:33,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3386 conditions, 517 events. 253/517 cut-off events. For 11138/11142 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2408 event pairs, 44 based on Foata normal form. 8/522 useless extension candidates. Maximal degree in co-relation 3326. Up to 467 conditions per place. [2022-12-13 16:03:33,681 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 90 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2022-12-13 16:03:33,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 107 transitions, 1282 flow [2022-12-13 16:03:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:03:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:03:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 372 transitions. [2022-12-13 16:03:33,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2022-12-13 16:03:33,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 372 transitions. [2022-12-13 16:03:33,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 372 transitions. [2022-12-13 16:03:33,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:33,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 372 transitions. [2022-12-13 16:03:33,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,683 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,683 INFO L175 Difference]: Start difference. First operand has 172 places, 114 transitions, 1213 flow. Second operand 5 states and 372 transitions. [2022-12-13 16:03:33,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 107 transitions, 1282 flow [2022-12-13 16:03:33,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 107 transitions, 884 flow, removed 120 selfloop flow, removed 39 redundant places. [2022-12-13 16:03:33,700 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 687 flow [2022-12-13 16:03:33,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=687, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2022-12-13 16:03:33,700 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2022-12-13 16:03:33,700 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 687 flow [2022-12-13 16:03:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:33,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:33,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:33,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:33,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:33,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash 281302376, now seen corresponding path program 8 times [2022-12-13 16:03:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51529259] [2022-12-13 16:03:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:33,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51529259] [2022-12-13 16:03:34,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51529259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421162254] [2022-12-13 16:03:34,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:03:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:34,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:34,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:03:34,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:03:34,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:34,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 16:03:34,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:34,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:34,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421162254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:34,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:34,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-13 16:03:34,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068949566] [2022-12-13 16:03:34,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:34,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:03:34,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:03:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:03:34,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:34,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 100 transitions, 687 flow. Second operand has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:34,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:34,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:35,198 INFO L130 PetriNetUnfolder]: 263/539 cut-off events. [2022-12-13 16:03:35,199 INFO L131 PetriNetUnfolder]: For 4890/4890 co-relation queries the response was YES. [2022-12-13 16:03:35,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2598 conditions, 539 events. 263/539 cut-off events. For 4890/4890 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2547 event pairs, 30 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 2563. Up to 432 conditions per place. [2022-12-13 16:03:35,201 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 102 selfloop transitions, 27 changer transitions 8/137 dead transitions. [2022-12-13 16:03:35,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 1125 flow [2022-12-13 16:03:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:03:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:03:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 879 transitions. [2022-12-13 16:03:35,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334319526627219 [2022-12-13 16:03:35,203 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 879 transitions. [2022-12-13 16:03:35,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 879 transitions. [2022-12-13 16:03:35,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:35,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 879 transitions. [2022-12-13 16:03:35,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:35,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 156.0) internal successors, (2184), 14 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:35,205 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 156.0) internal successors, (2184), 14 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:35,205 INFO L175 Difference]: Start difference. First operand has 111 places, 100 transitions, 687 flow. Second operand 13 states and 879 transitions. [2022-12-13 16:03:35,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 1125 flow [2022-12-13 16:03:35,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 137 transitions, 1095 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 16:03:35,216 INFO L231 Difference]: Finished difference. Result has 121 places, 106 transitions, 803 flow [2022-12-13 16:03:35,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=803, PETRI_PLACES=121, PETRI_TRANSITIONS=106} [2022-12-13 16:03:35,216 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2022-12-13 16:03:35,216 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 106 transitions, 803 flow [2022-12-13 16:03:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:35,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:35,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:35,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:03:35,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:03:35,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1575540180, now seen corresponding path program 9 times [2022-12-13 16:03:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:35,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115283002] [2022-12-13 16:03:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:35,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:35,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115283002] [2022-12-13 16:03:35,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115283002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:35,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275600535] [2022-12-13 16:03:35,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:03:35,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:35,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:35,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:35,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:03:35,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:03:35,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:35,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:35,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275600535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:35,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:35,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 16:03:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513130714] [2022-12-13 16:03:35,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:35,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:03:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:03:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:03:35,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:35,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 106 transitions, 803 flow. Second operand has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:35,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:35,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:35,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:36,574 INFO L130 PetriNetUnfolder]: 265/546 cut-off events. [2022-12-13 16:03:36,574 INFO L131 PetriNetUnfolder]: For 5971/5971 co-relation queries the response was YES. [2022-12-13 16:03:36,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 546 events. 265/546 cut-off events. For 5971/5971 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2617 event pairs, 31 based on Foata normal form. 5/543 useless extension candidates. Maximal degree in co-relation 2800. Up to 258 conditions per place. [2022-12-13 16:03:36,577 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 102 selfloop transitions, 55 changer transitions 21/178 dead transitions. [2022-12-13 16:03:36,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 178 transitions, 1562 flow [2022-12-13 16:03:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:03:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:03:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1830 transitions. [2022-12-13 16:03:36,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43447293447293445 [2022-12-13 16:03:36,579 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1830 transitions. [2022-12-13 16:03:36,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1830 transitions. [2022-12-13 16:03:36,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:36,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1830 transitions. [2022-12-13 16:03:36,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 67.77777777777777) internal successors, (1830), 27 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:36,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:36,584 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:36,584 INFO L175 Difference]: Start difference. First operand has 121 places, 106 transitions, 803 flow. Second operand 27 states and 1830 transitions. [2022-12-13 16:03:36,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 178 transitions, 1562 flow [2022-12-13 16:03:36,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 178 transitions, 1434 flow, removed 45 selfloop flow, removed 8 redundant places. [2022-12-13 16:03:36,600 INFO L231 Difference]: Finished difference. Result has 143 places, 104 transitions, 869 flow [2022-12-13 16:03:36,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=869, PETRI_PLACES=143, PETRI_TRANSITIONS=104} [2022-12-13 16:03:36,601 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 123 predicate places. [2022-12-13 16:03:36,601 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 104 transitions, 869 flow [2022-12-13 16:03:36,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:36,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:36,602 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:36,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:03:36,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:36,802 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1696364032, now seen corresponding path program 10 times [2022-12-13 16:03:36,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:36,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266759789] [2022-12-13 16:03:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:36,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:36,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266759789] [2022-12-13 16:03:36,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266759789] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007604391] [2022-12-13 16:03:36,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:03:36,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:36,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:36,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:03:36,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:03:36,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:36,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:03:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:37,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007604391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:37,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:37,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 16:03:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044246317] [2022-12-13 16:03:37,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:37,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:03:37,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:03:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:03:37,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:37,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 104 transitions, 869 flow. Second operand has 19 states, 19 states have (on average 64.78947368421052) internal successors, (1231), 19 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:37,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:37,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:37,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:38,151 INFO L130 PetriNetUnfolder]: 252/529 cut-off events. [2022-12-13 16:03:38,151 INFO L131 PetriNetUnfolder]: For 5708/5708 co-relation queries the response was YES. [2022-12-13 16:03:38,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 529 events. 252/529 cut-off events. For 5708/5708 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2531 event pairs, 11 based on Foata normal form. 5/524 useless extension candidates. Maximal degree in co-relation 2823. Up to 318 conditions per place. [2022-12-13 16:03:38,154 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 117 selfloop transitions, 34 changer transitions 18/169 dead transitions. [2022-12-13 16:03:38,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 169 transitions, 1652 flow [2022-12-13 16:03:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:03:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 16:03:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1563 transitions. [2022-12-13 16:03:38,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43561872909698995 [2022-12-13 16:03:38,155 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1563 transitions. [2022-12-13 16:03:38,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1563 transitions. [2022-12-13 16:03:38,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:38,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1563 transitions. [2022-12-13 16:03:38,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.95652173913044) internal successors, (1563), 23 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:38,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 156.0) internal successors, (3744), 24 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:38,159 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 156.0) internal successors, (3744), 24 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:38,159 INFO L175 Difference]: Start difference. First operand has 143 places, 104 transitions, 869 flow. Second operand 23 states and 1563 transitions. [2022-12-13 16:03:38,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 169 transitions, 1652 flow [2022-12-13 16:03:38,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 169 transitions, 1515 flow, removed 24 selfloop flow, removed 23 redundant places. [2022-12-13 16:03:38,169 INFO L231 Difference]: Finished difference. Result has 142 places, 103 transitions, 867 flow [2022-12-13 16:03:38,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=867, PETRI_PLACES=142, PETRI_TRANSITIONS=103} [2022-12-13 16:03:38,169 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2022-12-13 16:03:38,169 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 103 transitions, 867 flow [2022-12-13 16:03:38,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.78947368421052) internal successors, (1231), 19 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:38,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:38,170 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:38,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:03:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:03:38,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1724069662, now seen corresponding path program 11 times [2022-12-13 16:03:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:38,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691156337] [2022-12-13 16:03:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:38,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691156337] [2022-12-13 16:03:38,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691156337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709292960] [2022-12-13 16:03:38,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:03:38,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:38,519 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:38,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:03:38,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:03:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:03:38,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:38,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709292960] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:38,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:38,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 16:03:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129305446] [2022-12-13 16:03:38,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:03:38,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:03:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:03:38,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:38,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 103 transitions, 867 flow. Second operand has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:38,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:38,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:38,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:39,359 INFO L130 PetriNetUnfolder]: 232/482 cut-off events. [2022-12-13 16:03:39,359 INFO L131 PetriNetUnfolder]: For 6061/6061 co-relation queries the response was YES. [2022-12-13 16:03:39,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 482 events. 232/482 cut-off events. For 6061/6061 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2182 event pairs, 15 based on Foata normal form. 1/479 useless extension candidates. Maximal degree in co-relation 2651. Up to 410 conditions per place. [2022-12-13 16:03:39,364 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 94 selfloop transitions, 23 changer transitions 8/125 dead transitions. [2022-12-13 16:03:39,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 125 transitions, 1209 flow [2022-12-13 16:03:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:03:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 16:03:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 745 transitions. [2022-12-13 16:03:39,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43414918414918413 [2022-12-13 16:03:39,366 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 745 transitions. [2022-12-13 16:03:39,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 745 transitions. [2022-12-13 16:03:39,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:39,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 745 transitions. [2022-12-13 16:03:39,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:39,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:39,369 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:39,369 INFO L175 Difference]: Start difference. First operand has 142 places, 103 transitions, 867 flow. Second operand 11 states and 745 transitions. [2022-12-13 16:03:39,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 125 transitions, 1209 flow [2022-12-13 16:03:39,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 125 transitions, 1113 flow, removed 17 selfloop flow, removed 19 redundant places. [2022-12-13 16:03:39,380 INFO L231 Difference]: Finished difference. Result has 132 places, 104 transitions, 864 flow [2022-12-13 16:03:39,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=864, PETRI_PLACES=132, PETRI_TRANSITIONS=104} [2022-12-13 16:03:39,380 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 112 predicate places. [2022-12-13 16:03:39,381 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 104 transitions, 864 flow [2022-12-13 16:03:39,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:39,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:39,381 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:39,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:03:39,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:03:39,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash -194998428, now seen corresponding path program 12 times [2022-12-13 16:03:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:39,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292339930] [2022-12-13 16:03:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:39,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:39,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292339930] [2022-12-13 16:03:39,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292339930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:39,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555124554] [2022-12-13 16:03:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:03:39,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:39,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:39,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:03:39,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:03:39,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:39,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555124554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:40,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-13 16:03:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664245867] [2022-12-13 16:03:40,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:40,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:40,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:40,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 104 transitions, 864 flow. Second operand has 23 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:40,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:40,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:40,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:40,728 INFO L130 PetriNetUnfolder]: 279/584 cut-off events. [2022-12-13 16:03:40,728 INFO L131 PetriNetUnfolder]: For 7700/7700 co-relation queries the response was YES. [2022-12-13 16:03:40,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 584 events. 279/584 cut-off events. For 7700/7700 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2869 event pairs, 11 based on Foata normal form. 4/584 useless extension candidates. Maximal degree in co-relation 3171. Up to 340 conditions per place. [2022-12-13 16:03:40,732 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 83 selfloop transitions, 72 changer transitions 28/183 dead transitions. [2022-12-13 16:03:40,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 183 transitions, 1737 flow [2022-12-13 16:03:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:03:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 16:03:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1629 transitions. [2022-12-13 16:03:40,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2022-12-13 16:03:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1629 transitions. [2022-12-13 16:03:40,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1629 transitions. [2022-12-13 16:03:40,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:40,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1629 transitions. [2022-12-13 16:03:40,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.875) internal successors, (1629), 24 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:40,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:40,738 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:40,738 INFO L175 Difference]: Start difference. First operand has 132 places, 104 transitions, 864 flow. Second operand 24 states and 1629 transitions. [2022-12-13 16:03:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 183 transitions, 1737 flow [2022-12-13 16:03:40,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 183 transitions, 1652 flow, removed 20 selfloop flow, removed 9 redundant places. [2022-12-13 16:03:40,752 INFO L231 Difference]: Finished difference. Result has 153 places, 125 transitions, 1232 flow [2022-12-13 16:03:40,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1232, PETRI_PLACES=153, PETRI_TRANSITIONS=125} [2022-12-13 16:03:40,752 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2022-12-13 16:03:40,752 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 125 transitions, 1232 flow [2022-12-13 16:03:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:40,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:40,753 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:40,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:03:40,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:40,954 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash -603518836, now seen corresponding path program 13 times [2022-12-13 16:03:40,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494999807] [2022-12-13 16:03:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:40,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:41,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494999807] [2022-12-13 16:03:41,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494999807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838747945] [2022-12-13 16:03:41,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:03:41,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:41,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:41,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:41,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:03:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:41,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838747945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:41,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:41,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-13 16:03:41,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21300754] [2022-12-13 16:03:41,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:41,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:41,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:41,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:41,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 125 transitions, 1232 flow. Second operand has 23 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:41,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:41,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:41,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:42,753 INFO L130 PetriNetUnfolder]: 400/853 cut-off events. [2022-12-13 16:03:42,753 INFO L131 PetriNetUnfolder]: For 14654/14654 co-relation queries the response was YES. [2022-12-13 16:03:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 853 events. 400/853 cut-off events. For 14654/14654 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4826 event pairs, 9 based on Foata normal form. 12/861 useless extension candidates. Maximal degree in co-relation 5383. Up to 195 conditions per place. [2022-12-13 16:03:42,764 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 117 selfloop transitions, 117 changer transitions 48/282 dead transitions. [2022-12-13 16:03:42,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 282 transitions, 3121 flow [2022-12-13 16:03:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 16:03:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 16:03:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2385 transitions. [2022-12-13 16:03:42,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368131868131868 [2022-12-13 16:03:42,767 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2385 transitions. [2022-12-13 16:03:42,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2385 transitions. [2022-12-13 16:03:42,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:42,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2385 transitions. [2022-12-13 16:03:42,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.14285714285714) internal successors, (2385), 35 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 156.0) internal successors, (5616), 36 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,772 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 156.0) internal successors, (5616), 36 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,772 INFO L175 Difference]: Start difference. First operand has 153 places, 125 transitions, 1232 flow. Second operand 35 states and 2385 transitions. [2022-12-13 16:03:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 282 transitions, 3121 flow [2022-12-13 16:03:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 282 transitions, 2663 flow, removed 182 selfloop flow, removed 16 redundant places. [2022-12-13 16:03:42,804 INFO L231 Difference]: Finished difference. Result has 180 places, 162 transitions, 1782 flow [2022-12-13 16:03:42,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1782, PETRI_PLACES=180, PETRI_TRANSITIONS=162} [2022-12-13 16:03:42,805 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 160 predicate places. [2022-12-13 16:03:42,805 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 162 transitions, 1782 flow [2022-12-13 16:03:42,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:42,805 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:42,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:03:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:43,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2103332228, now seen corresponding path program 14 times [2022-12-13 16:03:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:43,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96996013] [2022-12-13 16:03:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:43,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:43,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96996013] [2022-12-13 16:03:43,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96996013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:43,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869776402] [2022-12-13 16:03:43,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:03:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:43,150 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:43,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:03:43,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:03:43,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:43,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:43,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869776402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:43,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:43,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 16:03:43,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721521640] [2022-12-13 16:03:43,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:03:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:03:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:03:43,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:43,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 162 transitions, 1782 flow. Second operand has 22 states, 22 states have (on average 64.72727272727273) internal successors, (1424), 22 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:43,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:43,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:44,303 INFO L130 PetriNetUnfolder]: 483/964 cut-off events. [2022-12-13 16:03:44,303 INFO L131 PetriNetUnfolder]: For 13760/13760 co-relation queries the response was YES. [2022-12-13 16:03:44,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 964 events. 483/964 cut-off events. For 13760/13760 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5204 event pairs, 17 based on Foata normal form. 8/968 useless extension candidates. Maximal degree in co-relation 6356. Up to 382 conditions per place. [2022-12-13 16:03:44,309 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 126 selfloop transitions, 80 changer transitions 74/280 dead transitions. [2022-12-13 16:03:44,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 280 transitions, 3397 flow [2022-12-13 16:03:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:03:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:03:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1830 transitions. [2022-12-13 16:03:44,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43447293447293445 [2022-12-13 16:03:44,311 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1830 transitions. [2022-12-13 16:03:44,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1830 transitions. [2022-12-13 16:03:44,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:44,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1830 transitions. [2022-12-13 16:03:44,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 67.77777777777777) internal successors, (1830), 27 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:44,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:44,316 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:44,316 INFO L175 Difference]: Start difference. First operand has 180 places, 162 transitions, 1782 flow. Second operand 27 states and 1830 transitions. [2022-12-13 16:03:44,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 280 transitions, 3397 flow [2022-12-13 16:03:44,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 280 transitions, 2840 flow, removed 233 selfloop flow, removed 25 redundant places. [2022-12-13 16:03:44,359 INFO L231 Difference]: Finished difference. Result has 186 places, 148 transitions, 1618 flow [2022-12-13 16:03:44,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1618, PETRI_PLACES=186, PETRI_TRANSITIONS=148} [2022-12-13 16:03:44,359 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 166 predicate places. [2022-12-13 16:03:44,360 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 148 transitions, 1618 flow [2022-12-13 16:03:44,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.72727272727273) internal successors, (1424), 22 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:44,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:44,360 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:44,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:44,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:03:44,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash -549582804, now seen corresponding path program 15 times [2022-12-13 16:03:44,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:44,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237253214] [2022-12-13 16:03:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:44,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237253214] [2022-12-13 16:03:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237253214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965203179] [2022-12-13 16:03:44,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:03:44,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:44,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:44,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:44,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:03:44,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:03:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:44,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:44,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:45,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965203179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:45,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:45,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-13 16:03:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12345343] [2022-12-13 16:03:45,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:45,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:45,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:45,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 148 transitions, 1618 flow. Second operand has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:45,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:45,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:46,152 INFO L130 PetriNetUnfolder]: 486/960 cut-off events. [2022-12-13 16:03:46,152 INFO L131 PetriNetUnfolder]: For 12139/12139 co-relation queries the response was YES. [2022-12-13 16:03:46,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6149 conditions, 960 events. 486/960 cut-off events. For 12139/12139 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5123 event pairs, 17 based on Foata normal form. 9/965 useless extension candidates. Maximal degree in co-relation 6094. Up to 392 conditions per place. [2022-12-13 16:03:46,164 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 137 selfloop transitions, 102 changer transitions 34/273 dead transitions. [2022-12-13 16:03:46,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 273 transitions, 3333 flow [2022-12-13 16:03:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 16:03:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 16:03:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2106 transitions. [2022-12-13 16:03:46,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2022-12-13 16:03:46,167 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2106 transitions. [2022-12-13 16:03:46,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2106 transitions. [2022-12-13 16:03:46,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:46,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2106 transitions. [2022-12-13 16:03:46,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 67.93548387096774) internal successors, (2106), 31 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:46,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 156.0) internal successors, (4992), 32 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:46,174 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 156.0) internal successors, (4992), 32 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:46,174 INFO L175 Difference]: Start difference. First operand has 186 places, 148 transitions, 1618 flow. Second operand 31 states and 2106 transitions. [2022-12-13 16:03:46,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 273 transitions, 3333 flow [2022-12-13 16:03:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 2925 flow, removed 165 selfloop flow, removed 18 redundant places. [2022-12-13 16:03:46,218 INFO L231 Difference]: Finished difference. Result has 192 places, 172 transitions, 2090 flow [2022-12-13 16:03:46,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2090, PETRI_PLACES=192, PETRI_TRANSITIONS=172} [2022-12-13 16:03:46,218 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 172 predicate places. [2022-12-13 16:03:46,219 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 172 transitions, 2090 flow [2022-12-13 16:03:46,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:46,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:46,219 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:46,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 16:03:46,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:03:46,420 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash -474480654, now seen corresponding path program 16 times [2022-12-13 16:03:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:46,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558146311] [2022-12-13 16:03:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:46,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558146311] [2022-12-13 16:03:46,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558146311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402245054] [2022-12-13 16:03:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:03:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:46,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:46,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:03:46,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:03:46,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:46,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:46,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402245054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:46,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:46,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-13 16:03:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002517973] [2022-12-13 16:03:46,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:46,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:46,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:46,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 172 transitions, 2090 flow. Second operand has 23 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:46,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:46,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:47,600 INFO L130 PetriNetUnfolder]: 432/843 cut-off events. [2022-12-13 16:03:47,600 INFO L131 PetriNetUnfolder]: For 12155/12155 co-relation queries the response was YES. [2022-12-13 16:03:47,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5598 conditions, 843 events. 432/843 cut-off events. For 12155/12155 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4249 event pairs, 13 based on Foata normal form. 4/843 useless extension candidates. Maximal degree in co-relation 5539. Up to 392 conditions per place. [2022-12-13 16:03:47,605 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 127 selfloop transitions, 92 changer transitions 20/239 dead transitions. [2022-12-13 16:03:47,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 239 transitions, 2998 flow [2022-12-13 16:03:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:03:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 16:03:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1628 transitions. [2022-12-13 16:03:47,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43482905982905984 [2022-12-13 16:03:47,608 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1628 transitions. [2022-12-13 16:03:47,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1628 transitions. [2022-12-13 16:03:47,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:47,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1628 transitions. [2022-12-13 16:03:47,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.83333333333333) internal successors, (1628), 24 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:47,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:47,615 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:47,615 INFO L175 Difference]: Start difference. First operand has 192 places, 172 transitions, 2090 flow. Second operand 24 states and 1628 transitions. [2022-12-13 16:03:47,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 239 transitions, 2998 flow [2022-12-13 16:03:47,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 239 transitions, 2629 flow, removed 124 selfloop flow, removed 20 redundant places. [2022-12-13 16:03:47,652 INFO L231 Difference]: Finished difference. Result has 195 places, 168 transitions, 1906 flow [2022-12-13 16:03:47,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1906, PETRI_PLACES=195, PETRI_TRANSITIONS=168} [2022-12-13 16:03:47,652 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2022-12-13 16:03:47,652 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 168 transitions, 1906 flow [2022-12-13 16:03:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:47,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:47,653 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:47,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:03:47,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:03:47,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash 467158526, now seen corresponding path program 17 times [2022-12-13 16:03:47,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:47,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729259680] [2022-12-13 16:03:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:47,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:48,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729259680] [2022-12-13 16:03:48,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729259680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347657017] [2022-12-13 16:03:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:03:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:48,022 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:48,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 16:03:48,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:03:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:03:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:48,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:48,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347657017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:48,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:48,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-13 16:03:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446464272] [2022-12-13 16:03:48,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:48,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:48,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:48,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 168 transitions, 1906 flow. Second operand has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:48,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:48,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:48,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:49,005 INFO L130 PetriNetUnfolder]: 471/914 cut-off events. [2022-12-13 16:03:49,005 INFO L131 PetriNetUnfolder]: For 12917/12917 co-relation queries the response was YES. [2022-12-13 16:03:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 914 events. 471/914 cut-off events. For 12917/12917 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4695 event pairs, 29 based on Foata normal form. 6/916 useless extension candidates. Maximal degree in co-relation 5908. Up to 597 conditions per place. [2022-12-13 16:03:49,010 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 164 selfloop transitions, 41 changer transitions 42/247 dead transitions. [2022-12-13 16:03:49,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 247 transitions, 3018 flow [2022-12-13 16:03:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:03:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 16:03:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1616 transitions. [2022-12-13 16:03:49,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2022-12-13 16:03:49,012 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1616 transitions. [2022-12-13 16:03:49,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1616 transitions. [2022-12-13 16:03:49,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:49,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1616 transitions. [2022-12-13 16:03:49,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.33333333333333) internal successors, (1616), 24 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:49,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:49,016 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:49,016 INFO L175 Difference]: Start difference. First operand has 195 places, 168 transitions, 1906 flow. Second operand 24 states and 1616 transitions. [2022-12-13 16:03:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 247 transitions, 3018 flow [2022-12-13 16:03:49,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 247 transitions, 2768 flow, removed 21 selfloop flow, removed 25 redundant places. [2022-12-13 16:03:49,044 INFO L231 Difference]: Finished difference. Result has 196 places, 165 transitions, 1834 flow [2022-12-13 16:03:49,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1834, PETRI_PLACES=196, PETRI_TRANSITIONS=165} [2022-12-13 16:03:49,045 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2022-12-13 16:03:49,045 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 165 transitions, 1834 flow [2022-12-13 16:03:49,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:49,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:49,045 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:49,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:49,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:49,246 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash -524745556, now seen corresponding path program 18 times [2022-12-13 16:03:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:49,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471820387] [2022-12-13 16:03:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:49,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:49,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471820387] [2022-12-13 16:03:49,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471820387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561029159] [2022-12-13 16:03:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:03:49,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:49,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:49,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:49,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 16:03:49,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:03:49,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:49,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:49,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561029159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:49,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:49,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-12-13 16:03:49,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026322830] [2022-12-13 16:03:49,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:49,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:49,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:49,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:50,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 156 [2022-12-13 16:03:50,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 165 transitions, 1834 flow. Second operand has 23 states, 23 states have (on average 61.82608695652174) internal successors, (1422), 23 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:50,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:50,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 156 [2022-12-13 16:03:50,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:51,247 INFO L130 PetriNetUnfolder]: 544/1067 cut-off events. [2022-12-13 16:03:51,247 INFO L131 PetriNetUnfolder]: For 18644/18644 co-relation queries the response was YES. [2022-12-13 16:03:51,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7388 conditions, 1067 events. 544/1067 cut-off events. For 18644/18644 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5742 event pairs, 35 based on Foata normal form. 8/1071 useless extension candidates. Maximal degree in co-relation 7324. Up to 633 conditions per place. [2022-12-13 16:03:51,253 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 194 selfloop transitions, 63 changer transitions 36/293 dead transitions. [2022-12-13 16:03:51,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 293 transitions, 3476 flow [2022-12-13 16:03:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:03:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:03:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1770 transitions. [2022-12-13 16:03:51,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4202279202279202 [2022-12-13 16:03:51,255 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1770 transitions. [2022-12-13 16:03:51,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1770 transitions. [2022-12-13 16:03:51,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:51,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1770 transitions. [2022-12-13 16:03:51,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.55555555555556) internal successors, (1770), 27 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:51,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:51,259 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 156.0) internal successors, (4368), 28 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:51,260 INFO L175 Difference]: Start difference. First operand has 196 places, 165 transitions, 1834 flow. Second operand 27 states and 1770 transitions. [2022-12-13 16:03:51,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 293 transitions, 3476 flow [2022-12-13 16:03:51,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 293 transitions, 3244 flow, removed 83 selfloop flow, removed 21 redundant places. [2022-12-13 16:03:51,305 INFO L231 Difference]: Finished difference. Result has 203 places, 193 transitions, 2336 flow [2022-12-13 16:03:51,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2336, PETRI_PLACES=203, PETRI_TRANSITIONS=193} [2022-12-13 16:03:51,305 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2022-12-13 16:03:51,305 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 193 transitions, 2336 flow [2022-12-13 16:03:51,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.82608695652174) internal successors, (1422), 23 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:51,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:51,306 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:51,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 16:03:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:51,507 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2112861788, now seen corresponding path program 19 times [2022-12-13 16:03:51,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:51,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580310241] [2022-12-13 16:03:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:51,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:51,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580310241] [2022-12-13 16:03:51,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580310241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:51,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466477408] [2022-12-13 16:03:51,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:03:51,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:51,660 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:51,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 16:03:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:03:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:51,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:51,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466477408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:51,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:51,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-13 16:03:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237852938] [2022-12-13 16:03:51,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:03:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:03:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:03:52,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:52,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 193 transitions, 2336 flow. Second operand has 21 states, 21 states have (on average 64.76190476190476) internal successors, (1360), 21 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:52,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:52,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:52,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:52,884 INFO L130 PetriNetUnfolder]: 583/1142 cut-off events. [2022-12-13 16:03:52,884 INFO L131 PetriNetUnfolder]: For 25870/25870 co-relation queries the response was YES. [2022-12-13 16:03:52,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8413 conditions, 1142 events. 583/1142 cut-off events. For 25870/25870 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6230 event pairs, 43 based on Foata normal form. 10/1148 useless extension candidates. Maximal degree in co-relation 8342. Up to 714 conditions per place. [2022-12-13 16:03:52,891 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 178 selfloop transitions, 50 changer transitions 56/284 dead transitions. [2022-12-13 16:03:52,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 284 transitions, 3764 flow [2022-12-13 16:03:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:03:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:03:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1753 transitions. [2022-12-13 16:03:52,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4321992110453649 [2022-12-13 16:03:52,893 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1753 transitions. [2022-12-13 16:03:52,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1753 transitions. [2022-12-13 16:03:52,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:52,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1753 transitions. [2022-12-13 16:03:52,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.42307692307692) internal successors, (1753), 26 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:52,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:52,896 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:52,896 INFO L175 Difference]: Start difference. First operand has 203 places, 193 transitions, 2336 flow. Second operand 26 states and 1753 transitions. [2022-12-13 16:03:52,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 284 transitions, 3764 flow [2022-12-13 16:03:52,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 284 transitions, 3280 flow, removed 226 selfloop flow, removed 12 redundant places. [2022-12-13 16:03:52,952 INFO L231 Difference]: Finished difference. Result has 220 places, 187 transitions, 2145 flow [2022-12-13 16:03:52,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2145, PETRI_PLACES=220, PETRI_TRANSITIONS=187} [2022-12-13 16:03:52,952 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2022-12-13 16:03:52,952 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 187 transitions, 2145 flow [2022-12-13 16:03:52,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.76190476190476) internal successors, (1360), 21 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:52,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:52,953 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:52,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:53,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 16:03:53,154 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash -520198930, now seen corresponding path program 20 times [2022-12-13 16:03:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:53,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628846122] [2022-12-13 16:03:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:53,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628846122] [2022-12-13 16:03:53,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628846122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880415171] [2022-12-13 16:03:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:03:53,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:53,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:53,353 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:53,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 16:03:53,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:03:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:53,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:03:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:53,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:53,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880415171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:53,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:53,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 16:03:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76437090] [2022-12-13 16:03:53,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:03:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:03:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:03:53,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:53,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 187 transitions, 2145 flow. Second operand has 25 states, 25 states have (on average 64.6) internal successors, (1615), 25 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:53,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:53,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:53,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:55,763 INFO L130 PetriNetUnfolder]: 822/1573 cut-off events. [2022-12-13 16:03:55,763 INFO L131 PetriNetUnfolder]: For 39116/39116 co-relation queries the response was YES. [2022-12-13 16:03:55,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11938 conditions, 1573 events. 822/1573 cut-off events. For 39116/39116 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9071 event pairs, 41 based on Foata normal form. 10/1579 useless extension candidates. Maximal degree in co-relation 11862. Up to 554 conditions per place. [2022-12-13 16:03:55,776 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 221 selfloop transitions, 176 changer transitions 41/438 dead transitions. [2022-12-13 16:03:55,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 438 transitions, 5783 flow [2022-12-13 16:03:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 16:03:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 16:03:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3648 transitions. [2022-12-13 16:03:55,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43304843304843305 [2022-12-13 16:03:55,780 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3648 transitions. [2022-12-13 16:03:55,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3648 transitions. [2022-12-13 16:03:55,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:55,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3648 transitions. [2022-12-13 16:03:55,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 67.55555555555556) internal successors, (3648), 54 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:55,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 156.0) internal successors, (8580), 55 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:55,798 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 156.0) internal successors, (8580), 55 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:55,798 INFO L175 Difference]: Start difference. First operand has 220 places, 187 transitions, 2145 flow. Second operand 54 states and 3648 transitions. [2022-12-13 16:03:55,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 438 transitions, 5783 flow [2022-12-13 16:03:55,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 438 transitions, 5441 flow, removed 128 selfloop flow, removed 23 redundant places. [2022-12-13 16:03:55,889 INFO L231 Difference]: Finished difference. Result has 253 places, 284 transitions, 4126 flow [2022-12-13 16:03:55,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4126, PETRI_PLACES=253, PETRI_TRANSITIONS=284} [2022-12-13 16:03:55,890 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2022-12-13 16:03:55,890 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 284 transitions, 4126 flow [2022-12-13 16:03:55,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.6) internal successors, (1615), 25 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:55,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:55,890 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:55,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:56,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 16:03:56,092 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash 530209650, now seen corresponding path program 21 times [2022-12-13 16:03:56,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:56,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423651149] [2022-12-13 16:03:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:56,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:56,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423651149] [2022-12-13 16:03:56,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423651149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659544422] [2022-12-13 16:03:56,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:03:56,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:56,270 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:56,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 16:03:56,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 16:03:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:03:56,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:56,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:56,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659544422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:56,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:56,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2022-12-13 16:03:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664510555] [2022-12-13 16:03:56,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:56,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:56,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:56,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 284 transitions, 4126 flow. Second operand has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:56,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:56,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:56,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:57,875 INFO L130 PetriNetUnfolder]: 931/1775 cut-off events. [2022-12-13 16:03:57,875 INFO L131 PetriNetUnfolder]: For 73431/73431 co-relation queries the response was YES. [2022-12-13 16:03:57,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15963 conditions, 1775 events. 931/1775 cut-off events. For 73431/73431 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10304 event pairs, 57 based on Foata normal form. 7/1778 useless extension candidates. Maximal degree in co-relation 15880. Up to 1016 conditions per place. [2022-12-13 16:03:57,900 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 275 selfloop transitions, 135 changer transitions 25/435 dead transitions. [2022-12-13 16:03:57,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 435 transitions, 7221 flow [2022-12-13 16:03:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 16:03:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 16:03:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2288 transitions. [2022-12-13 16:03:57,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2022-12-13 16:03:57,903 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2288 transitions. [2022-12-13 16:03:57,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2288 transitions. [2022-12-13 16:03:57,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:57,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2288 transitions. [2022-12-13 16:03:57,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 67.29411764705883) internal successors, (2288), 34 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:57,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 156.0) internal successors, (5460), 35 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:57,911 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 156.0) internal successors, (5460), 35 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:57,911 INFO L175 Difference]: Start difference. First operand has 253 places, 284 transitions, 4126 flow. Second operand 34 states and 2288 transitions. [2022-12-13 16:03:57,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 435 transitions, 7221 flow [2022-12-13 16:03:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 435 transitions, 5320 flow, removed 903 selfloop flow, removed 24 redundant places. [2022-12-13 16:03:58,158 INFO L231 Difference]: Finished difference. Result has 267 places, 320 transitions, 4034 flow [2022-12-13 16:03:58,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4034, PETRI_PLACES=267, PETRI_TRANSITIONS=320} [2022-12-13 16:03:58,158 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 247 predicate places. [2022-12-13 16:03:58,159 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 320 transitions, 4034 flow [2022-12-13 16:03:58,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:58,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:58,159 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:58,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 16:03:58,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:58,360 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:03:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1684286050, now seen corresponding path program 22 times [2022-12-13 16:03:58,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:58,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555492987] [2022-12-13 16:03:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:58,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:58,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555492987] [2022-12-13 16:03:58,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555492987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:58,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463237019] [2022-12-13 16:03:58,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:03:58,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:58,498 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 16:03:58,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:03:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:03:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:03:58,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:03:58,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:03:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463237019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:58,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2022-12-13 16:03:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076930542] [2022-12-13 16:03:58,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:03:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:03:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:03:58,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:03:58,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 320 transitions, 4034 flow. Second operand has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:58,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:58,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:03:58,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:59,964 INFO L130 PetriNetUnfolder]: 1055/1998 cut-off events. [2022-12-13 16:03:59,965 INFO L131 PetriNetUnfolder]: For 82188/82188 co-relation queries the response was YES. [2022-12-13 16:03:59,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16074 conditions, 1998 events. 1055/1998 cut-off events. For 82188/82188 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11862 event pairs, 57 based on Foata normal form. 6/2000 useless extension candidates. Maximal degree in co-relation 15986. Up to 1419 conditions per place. [2022-12-13 16:03:59,982 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 340 selfloop transitions, 81 changer transitions 11/432 dead transitions. [2022-12-13 16:03:59,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 432 transitions, 6064 flow [2022-12-13 16:03:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:03:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:03:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1760 transitions. [2022-12-13 16:03:59,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4339250493096647 [2022-12-13 16:03:59,984 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1760 transitions. [2022-12-13 16:03:59,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1760 transitions. [2022-12-13 16:03:59,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:59,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1760 transitions. [2022-12-13 16:03:59,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.6923076923077) internal successors, (1760), 26 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:59,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:59,990 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 156.0) internal successors, (4212), 27 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:59,990 INFO L175 Difference]: Start difference. First operand has 267 places, 320 transitions, 4034 flow. Second operand 26 states and 1760 transitions. [2022-12-13 16:03:59,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 432 transitions, 6064 flow [2022-12-13 16:04:00,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 432 transitions, 5708 flow, removed 103 selfloop flow, removed 25 redundant places. [2022-12-13 16:04:00,209 INFO L231 Difference]: Finished difference. Result has 272 places, 353 transitions, 4512 flow [2022-12-13 16:04:00,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4512, PETRI_PLACES=272, PETRI_TRANSITIONS=353} [2022-12-13 16:04:00,209 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2022-12-13 16:04:00,209 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 353 transitions, 4512 flow [2022-12-13 16:04:00,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.73913043478261) internal successors, (1489), 23 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:00,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:00,210 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:00,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 16:04:00,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:00,411 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1759388200, now seen corresponding path program 23 times [2022-12-13 16:04:00,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:00,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201985479] [2022-12-13 16:04:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:00,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201985479] [2022-12-13 16:04:00,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201985479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573289414] [2022-12-13 16:04:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:04:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:00,574 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:00,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 16:04:00,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:04:00,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:04:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:00,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573289414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:00,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:00,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2022-12-13 16:04:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409277776] [2022-12-13 16:04:00,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:04:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:04:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:04:01,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:01,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 353 transitions, 4512 flow. Second operand has 23 states, 23 states have (on average 64.82608695652173) internal successors, (1491), 23 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:01,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:01,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:01,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:02,605 INFO L130 PetriNetUnfolder]: 1104/2057 cut-off events. [2022-12-13 16:04:02,605 INFO L131 PetriNetUnfolder]: For 97116/97116 co-relation queries the response was YES. [2022-12-13 16:04:02,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17428 conditions, 2057 events. 1104/2057 cut-off events. For 97116/97116 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12059 event pairs, 49 based on Foata normal form. 8/2061 useless extension candidates. Maximal degree in co-relation 17336. Up to 1421 conditions per place. [2022-12-13 16:04:02,620 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 335 selfloop transitions, 109 changer transitions 43/487 dead transitions. [2022-12-13 16:04:02,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 487 transitions, 7124 flow [2022-12-13 16:04:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 16:04:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 16:04:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2425 transitions. [2022-12-13 16:04:02,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4318019943019943 [2022-12-13 16:04:02,622 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2425 transitions. [2022-12-13 16:04:02,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2425 transitions. [2022-12-13 16:04:02,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:02,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2425 transitions. [2022-12-13 16:04:02,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.36111111111111) internal successors, (2425), 36 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:02,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 156.0) internal successors, (5772), 37 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:02,626 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 156.0) internal successors, (5772), 37 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:02,627 INFO L175 Difference]: Start difference. First operand has 272 places, 353 transitions, 4512 flow. Second operand 36 states and 2425 transitions. [2022-12-13 16:04:02,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 487 transitions, 7124 flow [2022-12-13 16:04:02,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 487 transitions, 6805 flow, removed 136 selfloop flow, removed 13 redundant places. [2022-12-13 16:04:02,834 INFO L231 Difference]: Finished difference. Result has 298 places, 378 transitions, 5062 flow [2022-12-13 16:04:02,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5062, PETRI_PLACES=298, PETRI_TRANSITIONS=378} [2022-12-13 16:04:02,835 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 278 predicate places. [2022-12-13 16:04:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 378 transitions, 5062 flow [2022-12-13 16:04:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.82608695652173) internal successors, (1491), 23 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:02,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:02,835 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:02,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 16:04:03,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:04:03,036 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash -98346653, now seen corresponding path program 24 times [2022-12-13 16:04:03,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:03,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016419299] [2022-12-13 16:04:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:03,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:03,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:03,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016419299] [2022-12-13 16:04:03,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016419299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:03,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189698822] [2022-12-13 16:04:03,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:04:03,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:03,247 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:03,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 16:04:03,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:04:03,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:04:03,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:03,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:03,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189698822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:03,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:03,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-13 16:04:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977363878] [2022-12-13 16:04:03,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:03,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:04:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:04:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:04:03,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:03,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 378 transitions, 5062 flow. Second operand has 28 states, 28 states have (on average 64.57142857142857) internal successors, (1808), 28 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:03,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:03,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:06,431 INFO L130 PetriNetUnfolder]: 2123/4107 cut-off events. [2022-12-13 16:04:06,431 INFO L131 PetriNetUnfolder]: For 214028/214028 co-relation queries the response was YES. [2022-12-13 16:04:06,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38508 conditions, 4107 events. 2123/4107 cut-off events. For 214028/214028 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29580 event pairs, 46 based on Foata normal form. 19/4122 useless extension candidates. Maximal degree in co-relation 38412. Up to 1035 conditions per place. [2022-12-13 16:04:06,462 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 406 selfloop transitions, 433 changer transitions 57/896 dead transitions. [2022-12-13 16:04:06,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 896 transitions, 13725 flow [2022-12-13 16:04:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 16:04:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 16:04:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3618 transitions. [2022-12-13 16:04:06,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4375907111756168 [2022-12-13 16:04:06,465 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3618 transitions. [2022-12-13 16:04:06,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3618 transitions. [2022-12-13 16:04:06,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:06,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3618 transitions. [2022-12-13 16:04:06,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 68.26415094339623) internal successors, (3618), 53 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:06,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 156.0) internal successors, (8424), 54 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:06,472 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 156.0) internal successors, (8424), 54 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:06,472 INFO L175 Difference]: Start difference. First operand has 298 places, 378 transitions, 5062 flow. Second operand 53 states and 3618 transitions. [2022-12-13 16:04:06,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 896 transitions, 13725 flow [2022-12-13 16:04:06,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 896 transitions, 13063 flow, removed 238 selfloop flow, removed 26 redundant places. [2022-12-13 16:04:06,811 INFO L231 Difference]: Finished difference. Result has 337 places, 653 transitions, 10756 flow [2022-12-13 16:04:06,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4464, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=10756, PETRI_PLACES=337, PETRI_TRANSITIONS=653} [2022-12-13 16:04:06,812 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2022-12-13 16:04:06,812 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 653 transitions, 10756 flow [2022-12-13 16:04:06,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 64.57142857142857) internal successors, (1808), 28 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:06,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:06,812 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:06,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 16:04:07,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 16:04:07,013 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1207065619, now seen corresponding path program 25 times [2022-12-13 16:04:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:07,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652577608] [2022-12-13 16:04:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:07,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652577608] [2022-12-13 16:04:07,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652577608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656800769] [2022-12-13 16:04:07,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:04:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:07,156 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:07,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 16:04:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:04:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:07,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:07,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656800769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:07,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:07,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-13 16:04:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039820120] [2022-12-13 16:04:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:04:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:04:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:04:07,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:07,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 653 transitions, 10756 flow. Second operand has 28 states, 28 states have (on average 64.64285714285714) internal successors, (1810), 28 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:07,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:07,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:07,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:10,752 INFO L130 PetriNetUnfolder]: 2423/4731 cut-off events. [2022-12-13 16:04:10,752 INFO L131 PetriNetUnfolder]: For 286242/286242 co-relation queries the response was YES. [2022-12-13 16:04:10,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50084 conditions, 4731 events. 2423/4731 cut-off events. For 286242/286242 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35056 event pairs, 66 based on Foata normal form. 29/4756 useless extension candidates. Maximal degree in co-relation 49972. Up to 1650 conditions per place. [2022-12-13 16:04:10,794 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 430 selfloop transitions, 322 changer transitions 207/959 dead transitions. [2022-12-13 16:04:10,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 959 transitions, 18374 flow [2022-12-13 16:04:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 16:04:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 16:04:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3370 transitions. [2022-12-13 16:04:10,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43205128205128207 [2022-12-13 16:04:10,797 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3370 transitions. [2022-12-13 16:04:10,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3370 transitions. [2022-12-13 16:04:10,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:10,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3370 transitions. [2022-12-13 16:04:10,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 67.4) internal successors, (3370), 50 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:10,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 156.0) internal successors, (7956), 51 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:10,804 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 156.0) internal successors, (7956), 51 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:10,804 INFO L175 Difference]: Start difference. First operand has 337 places, 653 transitions, 10756 flow. Second operand 50 states and 3370 transitions. [2022-12-13 16:04:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 959 transitions, 18374 flow [2022-12-13 16:04:11,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 959 transitions, 15057 flow, removed 1582 selfloop flow, removed 29 redundant places. [2022-12-13 16:04:11,924 INFO L231 Difference]: Finished difference. Result has 373 places, 625 transitions, 9940 flow [2022-12-13 16:04:11,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=9940, PETRI_PLACES=373, PETRI_TRANSITIONS=625} [2022-12-13 16:04:11,925 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 353 predicate places. [2022-12-13 16:04:11,925 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 625 transitions, 9940 flow [2022-12-13 16:04:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 64.64285714285714) internal successors, (1810), 28 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:11,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:11,926 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 16:04:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:04:12,126 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1236927819, now seen corresponding path program 26 times [2022-12-13 16:04:12,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:12,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255497156] [2022-12-13 16:04:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:12,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:12,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255497156] [2022-12-13 16:04:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255497156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280152761] [2022-12-13 16:04:12,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:04:12,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:12,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:12,347 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:12,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 16:04:12,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:04:12,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:04:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:12,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:12,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280152761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:12,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:12,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-12-13 16:04:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784314806] [2022-12-13 16:04:12,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:12,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:04:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:04:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-12-13 16:04:13,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:13,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 625 transitions, 9940 flow. Second operand has 31 states, 31 states have (on average 64.51612903225806) internal successors, (2000), 31 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:13,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:13,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:13,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:16,572 INFO L130 PetriNetUnfolder]: 2635/5634 cut-off events. [2022-12-13 16:04:16,572 INFO L131 PetriNetUnfolder]: For 151825/151825 co-relation queries the response was YES. [2022-12-13 16:04:16,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47272 conditions, 5634 events. 2635/5634 cut-off events. For 151825/151825 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 46696 event pairs, 58 based on Foata normal form. 43/5673 useless extension candidates. Maximal degree in co-relation 47146. Up to 1373 conditions per place. [2022-12-13 16:04:16,618 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 467 selfloop transitions, 641 changer transitions 92/1200 dead transitions. [2022-12-13 16:04:16,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1200 transitions, 21544 flow [2022-12-13 16:04:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 16:04:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 16:04:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3671 transitions. [2022-12-13 16:04:16,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4357787274453941 [2022-12-13 16:04:16,621 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3671 transitions. [2022-12-13 16:04:16,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3671 transitions. [2022-12-13 16:04:16,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:16,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3671 transitions. [2022-12-13 16:04:16,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 67.98148148148148) internal successors, (3671), 54 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:16,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 156.0) internal successors, (8580), 55 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:16,627 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 156.0) internal successors, (8580), 55 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:16,628 INFO L175 Difference]: Start difference. First operand has 373 places, 625 transitions, 9940 flow. Second operand 54 states and 3671 transitions. [2022-12-13 16:04:16,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1200 transitions, 21544 flow [2022-12-13 16:04:17,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1200 transitions, 20173 flow, removed 603 selfloop flow, removed 38 redundant places. [2022-12-13 16:04:17,595 INFO L231 Difference]: Finished difference. Result has 391 places, 921 transitions, 17448 flow [2022-12-13 16:04:17,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=9331, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=17448, PETRI_PLACES=391, PETRI_TRANSITIONS=921} [2022-12-13 16:04:17,596 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2022-12-13 16:04:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 921 transitions, 17448 flow [2022-12-13 16:04:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 64.51612903225806) internal successors, (2000), 31 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:17,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:17,597 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:17,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 16:04:17,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 16:04:17,798 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1469923245, now seen corresponding path program 27 times [2022-12-13 16:04:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695474164] [2022-12-13 16:04:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:18,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:18,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695474164] [2022-12-13 16:04:18,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695474164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331305498] [2022-12-13 16:04:18,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:04:18,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:18,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:18,048 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:18,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 16:04:18,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 16:04:18,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:18,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:04:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:18,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:18,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331305498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:18,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:18,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 16:04:18,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190928170] [2022-12-13 16:04:18,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:18,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:04:18,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:04:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:04:18,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:18,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 921 transitions, 17448 flow. Second operand has 30 states, 30 states have (on average 64.56666666666666) internal successors, (1937), 30 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:18,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:18,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:18,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:21,920 INFO L130 PetriNetUnfolder]: 2784/5764 cut-off events. [2022-12-13 16:04:21,920 INFO L131 PetriNetUnfolder]: For 170853/170853 co-relation queries the response was YES. [2022-12-13 16:04:21,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51765 conditions, 5764 events. 2784/5764 cut-off events. For 170853/170853 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46502 event pairs, 74 based on Foata normal form. 92/5852 useless extension candidates. Maximal degree in co-relation 51634. Up to 1470 conditions per place. [2022-12-13 16:04:21,969 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 400 selfloop transitions, 441 changer transitions 420/1261 dead transitions. [2022-12-13 16:04:21,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1261 transitions, 25804 flow [2022-12-13 16:04:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 16:04:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-13 16:04:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3037 transitions. [2022-12-13 16:04:21,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326210826210826 [2022-12-13 16:04:21,972 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3037 transitions. [2022-12-13 16:04:21,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3037 transitions. [2022-12-13 16:04:21,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:21,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3037 transitions. [2022-12-13 16:04:21,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:21,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 156.0) internal successors, (7176), 46 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:21,977 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 156.0) internal successors, (7176), 46 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:21,977 INFO L175 Difference]: Start difference. First operand has 391 places, 921 transitions, 17448 flow. Second operand 45 states and 3037 transitions. [2022-12-13 16:04:21,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1261 transitions, 25804 flow [2022-12-13 16:04:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1261 transitions, 23112 flow, removed 1258 selfloop flow, removed 35 redundant places. [2022-12-13 16:04:23,970 INFO L231 Difference]: Finished difference. Result has 408 places, 739 transitions, 14426 flow [2022-12-13 16:04:23,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=15706, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14426, PETRI_PLACES=408, PETRI_TRANSITIONS=739} [2022-12-13 16:04:23,971 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2022-12-13 16:04:23,971 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 739 transitions, 14426 flow [2022-12-13 16:04:23,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 64.56666666666666) internal successors, (1937), 30 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:23,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:23,972 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:23,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 16:04:24,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:04:24,173 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 454383961, now seen corresponding path program 28 times [2022-12-13 16:04:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:24,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832828391] [2022-12-13 16:04:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832828391] [2022-12-13 16:04:24,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832828391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408276477] [2022-12-13 16:04:24,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:04:24,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:24,381 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:24,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 16:04:24,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:04:24,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:04:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:24,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:24,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408276477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:24,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:24,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 16:04:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916963111] [2022-12-13 16:04:24,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:24,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:04:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:24,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:04:24,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:04:25,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:25,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 739 transitions, 14426 flow. Second operand has 30 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:25,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:25,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:28,697 INFO L130 PetriNetUnfolder]: 2906/5650 cut-off events. [2022-12-13 16:04:28,698 INFO L131 PetriNetUnfolder]: For 210660/210660 co-relation queries the response was YES. [2022-12-13 16:04:28,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55772 conditions, 5650 events. 2906/5650 cut-off events. For 210660/210660 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 42427 event pairs, 147 based on Foata normal form. 25/5671 useless extension candidates. Maximal degree in co-relation 55634. Up to 3509 conditions per place. [2022-12-13 16:04:28,749 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 796 selfloop transitions, 190 changer transitions 173/1159 dead transitions. [2022-12-13 16:04:28,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1159 transitions, 23500 flow [2022-12-13 16:04:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 16:04:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-13 16:04:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3796 transitions. [2022-12-13 16:04:28,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2022-12-13 16:04:28,753 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3796 transitions. [2022-12-13 16:04:28,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3796 transitions. [2022-12-13 16:04:28,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:28,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3796 transitions. [2022-12-13 16:04:28,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 67.78571428571429) internal successors, (3796), 56 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:28,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 156.0) internal successors, (8892), 57 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:28,760 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 156.0) internal successors, (8892), 57 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:28,760 INFO L175 Difference]: Start difference. First operand has 408 places, 739 transitions, 14426 flow. Second operand 56 states and 3796 transitions. [2022-12-13 16:04:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1159 transitions, 23500 flow [2022-12-13 16:04:30,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1159 transitions, 21785 flow, removed 696 selfloop flow, removed 43 redundant places. [2022-12-13 16:04:30,018 INFO L231 Difference]: Finished difference. Result has 433 places, 841 transitions, 15615 flow [2022-12-13 16:04:30,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=13127, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=15615, PETRI_PLACES=433, PETRI_TRANSITIONS=841} [2022-12-13 16:04:30,019 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 413 predicate places. [2022-12-13 16:04:30,019 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 841 transitions, 15615 flow [2022-12-13 16:04:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:30,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:30,020 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:30,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 16:04:30,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:30,221 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1260391869, now seen corresponding path program 29 times [2022-12-13 16:04:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774246932] [2022-12-13 16:04:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:30,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774246932] [2022-12-13 16:04:30,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774246932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337157832] [2022-12-13 16:04:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:04:30,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:30,500 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:30,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 16:04:30,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:04:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:04:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:30,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:30,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337157832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:30,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:30,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 16:04:30,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109770813] [2022-12-13 16:04:30,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:04:30,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:04:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:04:31,170 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:31,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 841 transitions, 15615 flow. Second operand has 30 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:31,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:31,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:31,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:35,642 INFO L130 PetriNetUnfolder]: 2474/4982 cut-off events. [2022-12-13 16:04:35,642 INFO L131 PetriNetUnfolder]: For 159167/159167 co-relation queries the response was YES. [2022-12-13 16:04:35,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46269 conditions, 4982 events. 2474/4982 cut-off events. For 159167/159167 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37552 event pairs, 129 based on Foata normal form. 19/4997 useless extension candidates. Maximal degree in co-relation 46118. Up to 3513 conditions per place. [2022-12-13 16:04:35,691 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 793 selfloop transitions, 213 changer transitions 61/1067 dead transitions. [2022-12-13 16:04:35,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1067 transitions, 21803 flow [2022-12-13 16:04:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 16:04:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 16:04:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3530 transitions. [2022-12-13 16:04:35,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43515779092702167 [2022-12-13 16:04:35,695 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3530 transitions. [2022-12-13 16:04:35,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3530 transitions. [2022-12-13 16:04:35,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:35,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3530 transitions. [2022-12-13 16:04:35,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 67.88461538461539) internal successors, (3530), 52 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:35,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 156.0) internal successors, (8268), 53 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:35,701 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 156.0) internal successors, (8268), 53 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:35,701 INFO L175 Difference]: Start difference. First operand has 433 places, 841 transitions, 15615 flow. Second operand 52 states and 3530 transitions. [2022-12-13 16:04:35,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1067 transitions, 21803 flow [2022-12-13 16:04:36,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1067 transitions, 19635 flow, removed 1045 selfloop flow, removed 33 redundant places. [2022-12-13 16:04:37,003 INFO L231 Difference]: Finished difference. Result has 457 places, 867 transitions, 15935 flow [2022-12-13 16:04:37,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=14589, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=15935, PETRI_PLACES=457, PETRI_TRANSITIONS=867} [2022-12-13 16:04:37,004 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2022-12-13 16:04:37,004 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 867 transitions, 15935 flow [2022-12-13 16:04:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:37,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:37,004 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:37,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 16:04:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 16:04:37,205 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -693220924, now seen corresponding path program 30 times [2022-12-13 16:04:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:37,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745950449] [2022-12-13 16:04:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:37,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745950449] [2022-12-13 16:04:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745950449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782246421] [2022-12-13 16:04:37,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:04:37,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:37,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:37,471 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:37,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 16:04:37,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 16:04:37,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:04:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782246421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:38,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:38,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2022-12-13 16:04:38,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866161931] [2022-12-13 16:04:38,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:38,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:04:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:04:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:04:38,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:38,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 867 transitions, 15935 flow. Second operand has 32 states, 32 states have (on average 64.53125) internal successors, (2065), 32 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:38,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:38,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:38,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:42,897 INFO L130 PetriNetUnfolder]: 3563/7493 cut-off events. [2022-12-13 16:04:42,897 INFO L131 PetriNetUnfolder]: For 225293/225293 co-relation queries the response was YES. [2022-12-13 16:04:42,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67205 conditions, 7493 events. 3563/7493 cut-off events. For 225293/225293 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 63580 event pairs, 160 based on Foata normal form. 37/7526 useless extension candidates. Maximal degree in co-relation 67047. Up to 3871 conditions per place. [2022-12-13 16:04:42,969 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 826 selfloop transitions, 540 changer transitions 76/1442 dead transitions. [2022-12-13 16:04:42,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1442 transitions, 28612 flow [2022-12-13 16:04:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 16:04:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 16:04:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3611 transitions. [2022-12-13 16:04:42,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367440735365264 [2022-12-13 16:04:42,973 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3611 transitions. [2022-12-13 16:04:42,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3611 transitions. [2022-12-13 16:04:42,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:42,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3611 transitions. [2022-12-13 16:04:42,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 68.13207547169812) internal successors, (3611), 53 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:42,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 156.0) internal successors, (8424), 54 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:42,980 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 156.0) internal successors, (8424), 54 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:42,980 INFO L175 Difference]: Start difference. First operand has 457 places, 867 transitions, 15935 flow. Second operand 53 states and 3611 transitions. [2022-12-13 16:04:42,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1442 transitions, 28612 flow [2022-12-13 16:04:44,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1442 transitions, 26972 flow, removed 683 selfloop flow, removed 34 redundant places. [2022-12-13 16:04:44,630 INFO L231 Difference]: Finished difference. Result has 491 places, 1137 transitions, 23035 flow [2022-12-13 16:04:44,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=15135, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=23035, PETRI_PLACES=491, PETRI_TRANSITIONS=1137} [2022-12-13 16:04:44,630 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 471 predicate places. [2022-12-13 16:04:44,631 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1137 transitions, 23035 flow [2022-12-13 16:04:44,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 64.53125) internal successors, (2065), 32 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:44,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:44,631 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:44,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 16:04:44,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:44,832 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash 590689310, now seen corresponding path program 31 times [2022-12-13 16:04:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446886244] [2022-12-13 16:04:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:45,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446886244] [2022-12-13 16:04:45,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446886244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238141692] [2022-12-13 16:04:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:04:45,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:45,047 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:45,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 16:04:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:04:45,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:45,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:45,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238141692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:45,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:45,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2022-12-13 16:04:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914028973] [2022-12-13 16:04:45,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:45,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:04:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:04:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:04:45,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:45,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1137 transitions, 23035 flow. Second operand has 32 states, 32 states have (on average 64.53125) internal successors, (2065), 32 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:45,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:45,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:45,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:50,590 INFO L130 PetriNetUnfolder]: 3648/7609 cut-off events. [2022-12-13 16:04:50,591 INFO L131 PetriNetUnfolder]: For 284879/284879 co-relation queries the response was YES. [2022-12-13 16:04:50,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73773 conditions, 7609 events. 3648/7609 cut-off events. For 284879/284879 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 63934 event pairs, 80 based on Foata normal form. 38/7643 useless extension candidates. Maximal degree in co-relation 73599. Up to 2115 conditions per place. [2022-12-13 16:04:50,689 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 598 selfloop transitions, 649 changer transitions 38/1285 dead transitions. [2022-12-13 16:04:50,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1285 transitions, 28098 flow [2022-12-13 16:04:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 16:04:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 16:04:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2825 transitions. [2022-12-13 16:04:50,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4311660561660562 [2022-12-13 16:04:50,693 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2825 transitions. [2022-12-13 16:04:50,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2825 transitions. [2022-12-13 16:04:50,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:50,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2825 transitions. [2022-12-13 16:04:50,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 67.26190476190476) internal successors, (2825), 42 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:50,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 156.0) internal successors, (6708), 43 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:50,701 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 156.0) internal successors, (6708), 43 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:50,701 INFO L175 Difference]: Start difference. First operand has 491 places, 1137 transitions, 23035 flow. Second operand 42 states and 2825 transitions. [2022-12-13 16:04:50,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1285 transitions, 28098 flow [2022-12-13 16:04:53,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1285 transitions, 26522 flow, removed 692 selfloop flow, removed 28 redundant places. [2022-12-13 16:04:53,218 INFO L231 Difference]: Finished difference. Result has 503 places, 1156 transitions, 25135 flow [2022-12-13 16:04:53,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=21837, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=25135, PETRI_PLACES=503, PETRI_TRANSITIONS=1156} [2022-12-13 16:04:53,219 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 483 predicate places. [2022-12-13 16:04:53,219 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1156 transitions, 25135 flow [2022-12-13 16:04:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 64.53125) internal successors, (2065), 32 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:53,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:53,220 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:53,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 16:04:53,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:53,421 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:04:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:53,422 INFO L85 PathProgramCache]: Analyzing trace with hash 515587160, now seen corresponding path program 32 times [2022-12-13 16:04:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:53,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874951671] [2022-12-13 16:04:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:53,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:53,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:53,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874951671] [2022-12-13 16:04:53,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874951671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:53,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989857041] [2022-12-13 16:04:53,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:04:53,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:53,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:53,679 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:53,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 16:04:53,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:04:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:04:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:53,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:04:54,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989857041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:54,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:54,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2022-12-13 16:04:54,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490493307] [2022-12-13 16:04:54,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:54,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:04:54,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:04:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:04:54,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:04:54,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1156 transitions, 25135 flow. Second operand has 32 states, 32 states have (on average 64.59375) internal successors, (2067), 32 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:54,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:54,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:04:54,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:59,598 INFO L130 PetriNetUnfolder]: 3701/7543 cut-off events. [2022-12-13 16:04:59,598 INFO L131 PetriNetUnfolder]: For 257540/257540 co-relation queries the response was YES. [2022-12-13 16:04:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73628 conditions, 7543 events. 3701/7543 cut-off events. For 257540/257540 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 61959 event pairs, 70 based on Foata normal form. 59/7598 useless extension candidates. Maximal degree in co-relation 73456. Up to 2115 conditions per place. [2022-12-13 16:04:59,682 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 622 selfloop transitions, 655 changer transitions 95/1372 dead transitions. [2022-12-13 16:04:59,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1372 transitions, 32238 flow [2022-12-13 16:04:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 16:04:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 16:04:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3283 transitions. [2022-12-13 16:04:59,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2022-12-13 16:04:59,685 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3283 transitions. [2022-12-13 16:04:59,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3283 transitions. [2022-12-13 16:04:59,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:59,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3283 transitions. [2022-12-13 16:04:59,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 67.0) internal successors, (3283), 49 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:59,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 156.0) internal successors, (7800), 50 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:59,690 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 156.0) internal successors, (7800), 50 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:59,690 INFO L175 Difference]: Start difference. First operand has 503 places, 1156 transitions, 25135 flow. Second operand 49 states and 3283 transitions. [2022-12-13 16:04:59,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1372 transitions, 32238 flow [2022-12-13 16:05:02,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1372 transitions, 31088 flow, removed 412 selfloop flow, removed 36 redundant places. [2022-12-13 16:05:02,420 INFO L231 Difference]: Finished difference. Result has 515 places, 1188 transitions, 26811 flow [2022-12-13 16:05:02,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=24266, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=26811, PETRI_PLACES=515, PETRI_TRANSITIONS=1188} [2022-12-13 16:05:02,421 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 495 predicate places. [2022-12-13 16:05:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1188 transitions, 26811 flow [2022-12-13 16:05:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 64.59375) internal successors, (2067), 32 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:02,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:02,422 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:02,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 16:05:02,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 16:05:02,623 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2044638774, now seen corresponding path program 33 times [2022-12-13 16:05:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:02,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742659462] [2022-12-13 16:05:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:02,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:05:02,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742659462] [2022-12-13 16:05:02,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742659462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689312325] [2022-12-13 16:05:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:05:02,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:02,851 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:02,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 16:05:02,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:05:02,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:05:02,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:03,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:03,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689312325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:03,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:03,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 29 [2022-12-13 16:05:03,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070985644] [2022-12-13 16:05:03,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:03,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:05:03,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:05:03,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-12-13 16:05:03,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:03,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1188 transitions, 26811 flow. Second operand has 31 states, 31 states have (on average 64.64516129032258) internal successors, (2004), 31 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:03,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:03,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:03,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:08,770 INFO L130 PetriNetUnfolder]: 3865/7597 cut-off events. [2022-12-13 16:05:08,770 INFO L131 PetriNetUnfolder]: For 230832/230832 co-relation queries the response was YES. [2022-12-13 16:05:08,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76223 conditions, 7597 events. 3865/7597 cut-off events. For 230832/230832 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 60187 event pairs, 64 based on Foata normal form. 45/7638 useless extension candidates. Maximal degree in co-relation 76055. Up to 2136 conditions per place. [2022-12-13 16:05:08,849 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 522 selfloop transitions, 621 changer transitions 315/1458 dead transitions. [2022-12-13 16:05:08,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 1458 transitions, 34912 flow [2022-12-13 16:05:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 16:05:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 16:05:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3291 transitions. [2022-12-13 16:05:08,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4305337519623234 [2022-12-13 16:05:08,852 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3291 transitions. [2022-12-13 16:05:08,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3291 transitions. [2022-12-13 16:05:08,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:08,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3291 transitions. [2022-12-13 16:05:08,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 67.16326530612245) internal successors, (3291), 49 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:08,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 156.0) internal successors, (7800), 50 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:08,858 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 156.0) internal successors, (7800), 50 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:08,858 INFO L175 Difference]: Start difference. First operand has 515 places, 1188 transitions, 26811 flow. Second operand 49 states and 3291 transitions. [2022-12-13 16:05:08,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 1458 transitions, 34912 flow [2022-12-13 16:05:11,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1458 transitions, 32921 flow, removed 873 selfloop flow, removed 37 redundant places. [2022-12-13 16:05:11,396 INFO L231 Difference]: Finished difference. Result has 530 places, 1073 transitions, 24513 flow [2022-12-13 16:05:11,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=25168, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=24513, PETRI_PLACES=530, PETRI_TRANSITIONS=1073} [2022-12-13 16:05:11,397 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 510 predicate places. [2022-12-13 16:05:11,397 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 1073 transitions, 24513 flow [2022-12-13 16:05:11,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 64.64516129032258) internal successors, (2004), 31 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:11,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:11,397 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:11,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 16:05:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 16:05:11,598 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2025269799, now seen corresponding path program 34 times [2022-12-13 16:05:11,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:11,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621167256] [2022-12-13 16:05:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:11,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:11,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621167256] [2022-12-13 16:05:11,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621167256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:11,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392238635] [2022-12-13 16:05:11,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:05:11,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:11,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:11,845 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 16:05:11,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:05:11,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 16:05:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:12,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:12,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392238635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:12,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:12,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-12-13 16:05:12,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494517174] [2022-12-13 16:05:12,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:12,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:05:12,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:05:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 16:05:12,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 156 [2022-12-13 16:05:12,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 1073 transitions, 24513 flow. Second operand has 33 states, 33 states have (on average 61.63636363636363) internal successors, (2034), 33 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:12,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:12,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 156 [2022-12-13 16:05:12,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:16,530 INFO L130 PetriNetUnfolder]: 2943/6209 cut-off events. [2022-12-13 16:05:16,531 INFO L131 PetriNetUnfolder]: For 181603/181603 co-relation queries the response was YES. [2022-12-13 16:05:16,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61718 conditions, 6209 events. 2943/6209 cut-off events. For 181603/181603 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50463 event pairs, 3 based on Foata normal form. 61/6266 useless extension candidates. Maximal degree in co-relation 61542. Up to 3200 conditions per place. [2022-12-13 16:05:16,596 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 852 selfloop transitions, 283 changer transitions 242/1377 dead transitions. [2022-12-13 16:05:16,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1377 transitions, 32537 flow [2022-12-13 16:05:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:05:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 16:05:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2384 transitions. [2022-12-13 16:05:16,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41302841302841303 [2022-12-13 16:05:16,598 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2384 transitions. [2022-12-13 16:05:16,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2384 transitions. [2022-12-13 16:05:16,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:16,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2384 transitions. [2022-12-13 16:05:16,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.43243243243244) internal successors, (2384), 37 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:16,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 156.0) internal successors, (5928), 38 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:16,603 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 156.0) internal successors, (5928), 38 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:16,603 INFO L175 Difference]: Start difference. First operand has 530 places, 1073 transitions, 24513 flow. Second operand 37 states and 2384 transitions. [2022-12-13 16:05:16,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1377 transitions, 32537 flow [2022-12-13 16:05:18,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1377 transitions, 30469 flow, removed 481 selfloop flow, removed 43 redundant places. [2022-12-13 16:05:18,689 INFO L231 Difference]: Finished difference. Result has 510 places, 1047 transitions, 23646 flow [2022-12-13 16:05:18,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=22549, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23646, PETRI_PLACES=510, PETRI_TRANSITIONS=1047} [2022-12-13 16:05:18,690 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 490 predicate places. [2022-12-13 16:05:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 1047 transitions, 23646 flow [2022-12-13 16:05:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 61.63636363636363) internal successors, (2034), 33 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:18,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:18,690 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:18,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 16:05:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 16:05:18,891 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1860827089, now seen corresponding path program 35 times [2022-12-13 16:05:18,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:18,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477607483] [2022-12-13 16:05:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477607483] [2022-12-13 16:05:19,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477607483] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151216125] [2022-12-13 16:05:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:05:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:19,088 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:19,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 16:05:19,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 16:05:19,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 16:05:19,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:19,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:19,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151216125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:19,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:19,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-12-13 16:05:19,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454035318] [2022-12-13 16:05:19,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:05:19,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:05:19,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 16:05:19,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:19,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 1047 transitions, 23646 flow. Second operand has 33 states, 33 states have (on average 64.48484848484848) internal successors, (2128), 33 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:19,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:19,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:19,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:23,477 INFO L130 PetriNetUnfolder]: 2635/5435 cut-off events. [2022-12-13 16:05:23,477 INFO L131 PetriNetUnfolder]: For 195167/195167 co-relation queries the response was YES. [2022-12-13 16:05:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55125 conditions, 5435 events. 2635/5435 cut-off events. For 195167/195167 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41375 event pairs, 49 based on Foata normal form. 37/5468 useless extension candidates. Maximal degree in co-relation 54958. Up to 3542 conditions per place. [2022-12-13 16:05:23,534 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 916 selfloop transitions, 242 changer transitions 67/1225 dead transitions. [2022-12-13 16:05:23,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1225 transitions, 30304 flow [2022-12-13 16:05:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 16:05:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-13 16:05:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3032 transitions. [2022-12-13 16:05:23,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4319088319088319 [2022-12-13 16:05:23,538 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3032 transitions. [2022-12-13 16:05:23,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3032 transitions. [2022-12-13 16:05:23,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:23,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3032 transitions. [2022-12-13 16:05:23,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 67.37777777777778) internal successors, (3032), 45 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:23,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 156.0) internal successors, (7176), 46 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:23,546 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 156.0) internal successors, (7176), 46 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:23,546 INFO L175 Difference]: Start difference. First operand has 510 places, 1047 transitions, 23646 flow. Second operand 45 states and 3032 transitions. [2022-12-13 16:05:23,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1225 transitions, 30304 flow [2022-12-13 16:05:25,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1225 transitions, 26861 flow, removed 1634 selfloop flow, removed 33 redundant places. [2022-12-13 16:05:25,233 INFO L231 Difference]: Finished difference. Result has 522 places, 1070 transitions, 23316 flow [2022-12-13 16:05:25,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=21951, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=23316, PETRI_PLACES=522, PETRI_TRANSITIONS=1070} [2022-12-13 16:05:25,234 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 502 predicate places. [2022-12-13 16:05:25,234 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1070 transitions, 23316 flow [2022-12-13 16:05:25,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 64.48484848484848) internal successors, (2128), 33 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:25,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:25,235 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:25,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 16:05:25,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:25,436 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash 309197668, now seen corresponding path program 36 times [2022-12-13 16:05:25,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:25,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898695927] [2022-12-13 16:05:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:25,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:05:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898695927] [2022-12-13 16:05:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898695927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305760942] [2022-12-13 16:05:25,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:05:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:25,681 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:25,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 16:05:25,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 16:05:25,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:25,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 16:05:25,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:25,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:26,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305760942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:26,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2022-12-13 16:05:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174747086] [2022-12-13 16:05:26,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:26,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:05:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:05:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 16:05:26,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:26,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1070 transitions, 23316 flow. Second operand has 33 states, 33 states have (on average 64.57575757575758) internal successors, (2131), 33 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:26,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:26,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:29,797 INFO L130 PetriNetUnfolder]: 2568/5006 cut-off events. [2022-12-13 16:05:29,797 INFO L131 PetriNetUnfolder]: For 82897/82897 co-relation queries the response was YES. [2022-12-13 16:05:29,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45469 conditions, 5006 events. 2568/5006 cut-off events. For 82897/82897 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35316 event pairs, 100 based on Foata normal form. 45/5047 useless extension candidates. Maximal degree in co-relation 45305. Up to 1683 conditions per place. [2022-12-13 16:05:29,840 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 322 selfloop transitions, 35 changer transitions 824/1181 dead transitions. [2022-12-13 16:05:29,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1181 transitions, 26821 flow [2022-12-13 16:05:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 16:05:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 16:05:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2605 transitions. [2022-12-13 16:05:29,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.428172255095332 [2022-12-13 16:05:29,843 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2605 transitions. [2022-12-13 16:05:29,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2605 transitions. [2022-12-13 16:05:29,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:29,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2605 transitions. [2022-12-13 16:05:29,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 66.7948717948718) internal successors, (2605), 39 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:29,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 156.0) internal successors, (6240), 40 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:29,847 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 156.0) internal successors, (6240), 40 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:29,847 INFO L175 Difference]: Start difference. First operand has 522 places, 1070 transitions, 23316 flow. Second operand 39 states and 2605 transitions. [2022-12-13 16:05:29,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1181 transitions, 26821 flow [2022-12-13 16:05:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1181 transitions, 26140 flow, removed 276 selfloop flow, removed 36 redundant places. [2022-12-13 16:05:30,871 INFO L231 Difference]: Finished difference. Result has 506 places, 346 transitions, 6260 flow [2022-12-13 16:05:30,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=22667, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6260, PETRI_PLACES=506, PETRI_TRANSITIONS=346} [2022-12-13 16:05:30,872 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2022-12-13 16:05:30,872 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 346 transitions, 6260 flow [2022-12-13 16:05:30,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 64.57575757575758) internal successors, (2131), 33 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:30,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:30,872 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:30,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 16:05:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 16:05:31,073 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash 209296523, now seen corresponding path program 37 times [2022-12-13 16:05:31,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:31,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125291234] [2022-12-13 16:05:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:05:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125291234] [2022-12-13 16:05:31,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125291234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784605569] [2022-12-13 16:05:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:05:31,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:31,258 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:31,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 16:05:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:31,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 16:05:31,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:31,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:05:31,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784605569] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:31,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:31,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 9] total 30 [2022-12-13 16:05:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985647292] [2022-12-13 16:05:31,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:31,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:05:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:05:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:05:32,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:32,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 346 transitions, 6260 flow. Second operand has 32 states, 32 states have (on average 64.53125) internal successors, (2065), 32 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:32,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:32,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:32,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:35,346 INFO L130 PetriNetUnfolder]: 2158/4310 cut-off events. [2022-12-13 16:05:35,346 INFO L131 PetriNetUnfolder]: For 81390/81390 co-relation queries the response was YES. [2022-12-13 16:05:35,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36824 conditions, 4310 events. 2158/4310 cut-off events. For 81390/81390 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 30568 event pairs, 68 based on Foata normal form. 61/4369 useless extension candidates. Maximal degree in co-relation 36675. Up to 1679 conditions per place. [2022-12-13 16:05:35,384 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 316 selfloop transitions, 515 changer transitions 209/1040 dead transitions. [2022-12-13 16:05:35,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1040 transitions, 19892 flow [2022-12-13 16:05:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 16:05:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-13 16:05:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4187 transitions. [2022-12-13 16:05:35,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43289909015715466 [2022-12-13 16:05:35,387 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4187 transitions. [2022-12-13 16:05:35,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4187 transitions. [2022-12-13 16:05:35,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:35,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4187 transitions. [2022-12-13 16:05:35,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.53225806451613) internal successors, (4187), 62 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:35,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 156.0) internal successors, (9828), 63 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:35,394 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 156.0) internal successors, (9828), 63 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:35,394 INFO L175 Difference]: Start difference. First operand has 506 places, 346 transitions, 6260 flow. Second operand 62 states and 4187 transitions. [2022-12-13 16:05:35,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1040 transitions, 19892 flow [2022-12-13 16:05:35,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1040 transitions, 18703 flow, removed 424 selfloop flow, removed 51 redundant places. [2022-12-13 16:05:35,813 INFO L231 Difference]: Finished difference. Result has 342 places, 655 transitions, 14116 flow [2022-12-13 16:05:35,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=14116, PETRI_PLACES=342, PETRI_TRANSITIONS=655} [2022-12-13 16:05:35,813 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 322 predicate places. [2022-12-13 16:05:35,813 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 655 transitions, 14116 flow [2022-12-13 16:05:35,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 64.53125) internal successors, (2065), 32 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:35,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:35,814 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:35,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 16:05:36,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 16:05:36,015 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1516695802, now seen corresponding path program 38 times [2022-12-13 16:05:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:36,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703903834] [2022-12-13 16:05:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:36,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:05:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703903834] [2022-12-13 16:05:36,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703903834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767466664] [2022-12-13 16:05:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:05:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:36,206 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:36,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 16:05:36,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:05:36,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 16:05:36,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:36,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:36,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767466664] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:36,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:36,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 34 [2022-12-13 16:05:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803380017] [2022-12-13 16:05:36,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 16:05:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 16:05:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 16:05:37,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:37,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 655 transitions, 14116 flow. Second operand has 36 states, 36 states have (on average 64.5) internal successors, (2322), 36 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:37,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:37,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:40,194 INFO L130 PetriNetUnfolder]: 1850/3613 cut-off events. [2022-12-13 16:05:40,194 INFO L131 PetriNetUnfolder]: For 89580/89580 co-relation queries the response was YES. [2022-12-13 16:05:40,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35465 conditions, 3613 events. 1850/3613 cut-off events. For 89580/89580 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23874 event pairs, 0 based on Foata normal form. 38/3649 useless extension candidates. Maximal degree in co-relation 35312. Up to 1357 conditions per place. [2022-12-13 16:05:40,234 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 136 selfloop transitions, 635 changer transitions 64/835 dead transitions. [2022-12-13 16:05:40,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 835 transitions, 18260 flow [2022-12-13 16:05:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 16:05:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 16:05:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3480 transitions. [2022-12-13 16:05:40,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289940828402367 [2022-12-13 16:05:40,237 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3480 transitions. [2022-12-13 16:05:40,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3480 transitions. [2022-12-13 16:05:40,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:40,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3480 transitions. [2022-12-13 16:05:40,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 66.92307692307692) internal successors, (3480), 52 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:40,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 156.0) internal successors, (8268), 53 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:40,243 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 156.0) internal successors, (8268), 53 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:40,243 INFO L175 Difference]: Start difference. First operand has 342 places, 655 transitions, 14116 flow. Second operand 52 states and 3480 transitions. [2022-12-13 16:05:40,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 835 transitions, 18260 flow [2022-12-13 16:05:41,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 835 transitions, 15539 flow, removed 1320 selfloop flow, removed 24 redundant places. [2022-12-13 16:05:41,027 INFO L231 Difference]: Finished difference. Result has 373 places, 694 transitions, 13827 flow [2022-12-13 16:05:41,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=11929, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=13827, PETRI_PLACES=373, PETRI_TRANSITIONS=694} [2022-12-13 16:05:41,028 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 353 predicate places. [2022-12-13 16:05:41,028 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 694 transitions, 13827 flow [2022-12-13 16:05:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 64.5) internal successors, (2322), 36 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:41,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:41,028 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:41,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 16:05:41,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 16:05:41,229 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1504709736, now seen corresponding path program 39 times [2022-12-13 16:05:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:41,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401095547] [2022-12-13 16:05:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:41,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:05:41,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:41,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401095547] [2022-12-13 16:05:41,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401095547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:41,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106314736] [2022-12-13 16:05:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:05:41,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:41,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:41,502 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:41,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 16:05:41,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 16:05:41,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:41,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 16:05:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:41,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:42,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106314736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:42,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:42,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2022-12-13 16:05:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488395188] [2022-12-13 16:05:42,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 16:05:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 16:05:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 16:05:42,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:42,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 694 transitions, 13827 flow. Second operand has 39 states, 39 states have (on average 64.46153846153847) internal successors, (2514), 39 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:42,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:42,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:42,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:46,438 INFO L130 PetriNetUnfolder]: 3540/6607 cut-off events. [2022-12-13 16:05:46,438 INFO L131 PetriNetUnfolder]: For 98639/98639 co-relation queries the response was YES. [2022-12-13 16:05:46,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58995 conditions, 6607 events. 3540/6607 cut-off events. For 98639/98639 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46278 event pairs, 0 based on Foata normal form. 72/6677 useless extension candidates. Maximal degree in co-relation 58839. Up to 2065 conditions per place. [2022-12-13 16:05:46,525 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 219 selfloop transitions, 1218 changer transitions 131/1568 dead transitions. [2022-12-13 16:05:46,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1568 transitions, 32784 flow [2022-12-13 16:05:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 16:05:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 16:05:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2831 transitions. [2022-12-13 16:05:46,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320818070818071 [2022-12-13 16:05:46,531 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2831 transitions. [2022-12-13 16:05:46,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2831 transitions. [2022-12-13 16:05:46,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:46,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2831 transitions. [2022-12-13 16:05:46,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 67.4047619047619) internal successors, (2831), 42 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:46,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 156.0) internal successors, (6708), 43 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:46,542 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 156.0) internal successors, (6708), 43 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:46,542 INFO L175 Difference]: Start difference. First operand has 373 places, 694 transitions, 13827 flow. Second operand 42 states and 2831 transitions. [2022-12-13 16:05:46,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1568 transitions, 32784 flow [2022-12-13 16:05:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1568 transitions, 29286 flow, removed 968 selfloop flow, removed 51 redundant places. [2022-12-13 16:05:47,818 INFO L231 Difference]: Finished difference. Result has 367 places, 1301 transitions, 26271 flow [2022-12-13 16:05:47,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=12147, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=613, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=26271, PETRI_PLACES=367, PETRI_TRANSITIONS=1301} [2022-12-13 16:05:47,819 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2022-12-13 16:05:47,819 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1301 transitions, 26271 flow [2022-12-13 16:05:47,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 64.46153846153847) internal successors, (2514), 39 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:47,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:05:47,819 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:05:47,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 16:05:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 16:05:48,021 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:05:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:05:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash -533546096, now seen corresponding path program 40 times [2022-12-13 16:05:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:05:48,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510047207] [2022-12-13 16:05:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:05:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:05:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:05:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:05:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:05:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510047207] [2022-12-13 16:05:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510047207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:05:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420865416] [2022-12-13 16:05:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:05:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:05:48,247 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:05:48,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 16:05:48,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:05:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:05:48,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 16:05:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:05:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:48,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:05:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:05:48,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420865416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:05:48,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:05:48,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2022-12-13 16:05:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637446220] [2022-12-13 16:05:48,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:05:48,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 16:05:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:05:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 16:05:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 16:05:49,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2022-12-13 16:05:49,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1301 transitions, 26271 flow. Second operand has 39 states, 39 states have (on average 64.51282051282051) internal successors, (2516), 39 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:49,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:05:49,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2022-12-13 16:05:49,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:54,071 INFO L130 PetriNetUnfolder]: 3455/6095 cut-off events. [2022-12-13 16:05:54,071 INFO L131 PetriNetUnfolder]: For 92617/92617 co-relation queries the response was YES. [2022-12-13 16:05:54,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57131 conditions, 6095 events. 3455/6095 cut-off events. For 92617/92617 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 39392 event pairs, 0 based on Foata normal form. 37/6130 useless extension candidates. Maximal degree in co-relation 56980. Up to 2071 conditions per place. [2022-12-13 16:05:54,123 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 0 selfloop transitions, 0 changer transitions 1542/1542 dead transitions. [2022-12-13 16:05:54,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1542 transitions, 32355 flow [2022-12-13 16:05:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 16:05:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 16:05:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4535 transitions. [2022-12-13 16:05:54,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4275075414781297 [2022-12-13 16:05:54,127 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4535 transitions. [2022-12-13 16:05:54,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4535 transitions. [2022-12-13 16:05:54,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:54,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4535 transitions. [2022-12-13 16:05:54,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 66.69117647058823) internal successors, (4535), 68 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:54,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 156.0) internal successors, (10764), 69 states have internal predecessors, (10764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:54,135 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 156.0) internal successors, (10764), 69 states have internal predecessors, (10764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:54,135 INFO L175 Difference]: Start difference. First operand has 367 places, 1301 transitions, 26271 flow. Second operand 68 states and 4535 transitions. [2022-12-13 16:05:54,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1542 transitions, 32355 flow [2022-12-13 16:05:55,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1542 transitions, 31606 flow, removed 262 selfloop flow, removed 22 redundant places. [2022-12-13 16:05:55,533 INFO L231 Difference]: Finished difference. Result has 398 places, 0 transitions, 0 flow [2022-12-13 16:05:55,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=25690, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=0, PETRI_PLACES=398, PETRI_TRANSITIONS=0} [2022-12-13 16:05:55,533 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 378 predicate places. [2022-12-13 16:05:55,534 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 0 transitions, 0 flow [2022-12-13 16:05:55,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 64.51282051282051) internal successors, (2516), 39 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:55,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-13 16:05:55,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-13 16:05:55,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-13 16:05:55,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-13 16:05:55,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:05:55,736 INFO L445 BasicCegarLoop]: Path program histogram: [40, 1, 1] [2022-12-13 16:05:55,739 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 16:05:55,739 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 16:05:55,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 04:05:55 BasicIcfg [2022-12-13 16:05:55,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 16:05:55,742 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 16:05:55,742 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 16:05:55,742 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 16:05:55,742 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:03:20" (3/4) ... [2022-12-13 16:05:55,744 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 16:05:55,749 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-12-13 16:05:55,749 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-12-13 16:05:55,753 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-12-13 16:05:55,753 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 16:05:55,753 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 16:05:55,753 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 16:05:55,780 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 16:05:55,780 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 16:05:55,780 INFO L158 Benchmark]: Toolchain (without parser) took 155569.46ms. Allocated memory was 134.2MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 98.7MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-12-13 16:05:55,780 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 109.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 16:05:55,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.88ms. Allocated memory is still 134.2MB. Free memory was 98.7MB in the beginning and 87.4MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 16:05:55,781 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.60ms. Allocated memory is still 134.2MB. Free memory was 87.4MB in the beginning and 85.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:05:55,781 INFO L158 Benchmark]: Boogie Preprocessor took 16.14ms. Allocated memory is still 134.2MB. Free memory was 85.9MB in the beginning and 84.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:05:55,781 INFO L158 Benchmark]: RCFGBuilder took 292.62ms. Allocated memory is still 134.2MB. Free memory was 84.7MB in the beginning and 70.4MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 16:05:55,781 INFO L158 Benchmark]: TraceAbstraction took 155023.42ms. Allocated memory was 134.2MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 69.5MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-12-13 16:05:55,781 INFO L158 Benchmark]: Witness Printer took 38.27ms. Allocated memory is still 3.2GB. Free memory was 2.0GB in the beginning and 2.0GB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:05:55,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 109.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 169.88ms. Allocated memory is still 134.2MB. Free memory was 98.7MB in the beginning and 87.4MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.60ms. Allocated memory is still 134.2MB. Free memory was 87.4MB in the beginning and 85.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.14ms. Allocated memory is still 134.2MB. Free memory was 85.9MB in the beginning and 84.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 292.62ms. Allocated memory is still 134.2MB. Free memory was 84.7MB in the beginning and 70.4MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 155023.42ms. Allocated memory was 134.2MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 69.5MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Witness Printer took 38.27ms. Allocated memory is still 3.2GB. Free memory was 2.0GB in the beginning and 2.0GB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 76 PlacesBefore, 20 PlacesAfterwards, 75 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 7 FixpointIterations, 40 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 70 TotalNumberOfCompositions, 473 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 460, independent: 458, independent conditional: 0, independent unconditional: 458, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 211, independent: 209, independent conditional: 0, independent unconditional: 209, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 460, independent: 249, independent conditional: 0, independent unconditional: 249, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 211, unknown conditional: 0, unknown unconditional: 211] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 154.9s, OverallIterations: 42, TraceHistogramMax: 7, PathProgramHistogramMax: 40, EmptinessCheckTime: 0.0s, AutomataDifference: 119.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11704 SdHoareTripleChecker+Valid, 23.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11316 mSDsluCounter, 5164 SdHoareTripleChecker+Invalid, 20.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4890 mSDsCounter, 2459 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 52615 IncrementalHoareTripleChecker+Invalid, 55074 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2459 mSolverCounterUnsat, 274 mSDtfsCounter, 52615 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2841 GetRequests, 689 SyntacticMatches, 74 SemanticMatches, 2078 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39392 ImplicationChecksByTransitivity, 35.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26811occurred in iteration=34, InterpolantAutomatonStates: 1460, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 22.4s InterpolantComputationTime, 1435 NumberOfCodeBlocks, 1435 NumberOfCodeBlocksAsserted, 139 NumberOfCheckSat, 2017 ConstructedInterpolants, 0 QuantifiedInterpolants, 24507 SizeOfPredicates, 245 NumberOfNonLiveVariables, 5159 ConjunctsInSsa, 1075 ConjunctsInUnsatCore, 122 InterpolantComputations, 2 PerfectInterpolantSequences, 79/1180 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 16:05:55,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64c872c6-e8da-4e53-8ffb-6865b98f9ec5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE