./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/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_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/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_0a10a811-86df-45de-b4ff-ea5431afef1d/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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- 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 21:10:04,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:10:04,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:10:04,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:10:04,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:10:04,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:10:04,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:10:04,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:10:04,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:10:04,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:10:04,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:10:04,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:10:04,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:10:04,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:10:04,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:10:04,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:10:04,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:10:04,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:10:04,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:10:04,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:10:04,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:10:04,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:10:04,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:10:04,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:10:04,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:10:04,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:10:04,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:10:04,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:10:04,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:10:04,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:10:04,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:10:04,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:10:04,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:10:04,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:10:04,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:10:04,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:10:04,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:10:04,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:10:04,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:10:04,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:10:04,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:10:04,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:10:04,785 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:10:04,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:10:04,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:10:04,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:10:04,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:10:04,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:10:04,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:10:04,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:10:04,787 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:10:04,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:10:04,787 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:10:04,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:10:04,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:10:04,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:10:04,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:10:04,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:10:04,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:10:04,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:10:04,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:10:04,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:10:04,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:10:04,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:10:04,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:10:04,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:10:04,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:10:04,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:10:04,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:10:04,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:10:04,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:10:04,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:10:04,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:10:04,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:10:04,803 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:10:04,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:10:04,804 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:10:04,804 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_0a10a811-86df-45de-b4ff-ea5431afef1d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-12-13 21:10:04,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:10:05,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:10:05,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:10:05,007 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:10:05,007 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:10:05,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-13 21:10:07,601 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:10:07,784 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:10:07,785 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-13 21:10:07,789 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/data/fab8e7d7b/aca670d7df514c20b469848f189cf998/FLAGad4117991 [2022-12-13 21:10:08,188 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/data/fab8e7d7b/aca670d7df514c20b469848f189cf998 [2022-12-13 21:10:08,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:10:08,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:10:08,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:10:08,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:10:08,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:10:08,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704a8ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08, skipping insertion in model container [2022-12-13 21:10:08,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:10:08,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:10:08,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,332 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_0a10a811-86df-45de-b4ff-ea5431afef1d/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-13 21:10:08,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:10:08,342 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:10:08,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:10:08,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:10:08,358 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_0a10a811-86df-45de-b4ff-ea5431afef1d/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-13 21:10:08,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:10:08,368 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:10:08,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08 WrapperNode [2022-12-13 21:10:08,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:10:08,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:10:08,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:10:08,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:10:08,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,391 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-13 21:10:08,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:10:08,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:10:08,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:10:08,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:10:08,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:10:08,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:10:08,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:10:08,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:10:08,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (1/1) ... [2022-12-13 21:10:08,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:10:08,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:08,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:10:08,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:10:08,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:10:08,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:10:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:10:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:10:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:10:08,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:10:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:10:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:10:08,461 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 21:10:08,527 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:10:08,529 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:10:08,667 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:10:08,702 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:10:08,702 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 21:10:08,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:10:08 BoogieIcfgContainer [2022-12-13 21:10:08,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:10:08,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:10:08,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:10:08,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:10:08,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:10:08" (1/3) ... [2022-12-13 21:10:08,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cd8121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:10:08, skipping insertion in model container [2022-12-13 21:10:08,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:08" (2/3) ... [2022-12-13 21:10:08,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cd8121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:10:08, skipping insertion in model container [2022-12-13 21:10:08,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:10:08" (3/3) ... [2022-12-13 21:10:08,710 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-12-13 21:10:08,717 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:10:08,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:10:08,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:10:08,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:10:08,771 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 21:10:08,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-12-13 21:10:08,835 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-12-13 21:10:08,835 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:10:08,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-12-13 21:10:08,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-12-13 21:10:08,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-12-13 21:10:08,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:10:08,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 77 transitions, 166 flow [2022-12-13 21:10:08,855 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 77 transitions, 166 flow [2022-12-13 21:10:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 166 flow [2022-12-13 21:10:08,873 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-13 21:10:08,873 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:10:08,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 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. 0/71 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-12-13 21:10:08,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2022-12-13 21:10:10,976 INFO L134 LiptonReduction]: Checked pairs total: 608 [2022-12-13 21:10:10,976 INFO L136 LiptonReduction]: Total number of compositions: 72 [2022-12-13 21:10:10,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:10:10,991 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;@1e3539f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:10:10,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 21:10:10,995 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2022-12-13 21:10:10,995 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:10:10,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:10:10,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:10,996 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 21:10:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash 362542908, now seen corresponding path program 1 times [2022-12-13 21:10:11,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098790274] [2022-12-13 21:10:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:11,426 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 21:10:11,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:11,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098790274] [2022-12-13 21:10:11,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098790274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:10:11,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:10:11,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:10:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558573822] [2022-12-13 21:10:11,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:10:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:10:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:10:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:10:11,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 160 [2022-12-13 21:10:11,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:11,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:10:11,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 160 [2022-12-13 21:10:11,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:10:11,599 INFO L130 PetriNetUnfolder]: 72/130 cut-off events. [2022-12-13 21:10:11,599 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 21:10:11,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 130 events. 72/130 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 376 event pairs, 11 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 207. Up to 100 conditions per place. [2022-12-13 21:10:11,601 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 24 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2022-12-13 21:10:11,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 141 flow [2022-12-13 21:10:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:10:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:10:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 306 transitions. [2022-12-13 21:10:11,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.478125 [2022-12-13 21:10:11,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 306 transitions. [2022-12-13 21:10:11,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 306 transitions. [2022-12-13 21:10:11,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:10:11,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 306 transitions. [2022-12-13 21:10:11,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:11,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:11,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:11,625 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 4 states and 306 transitions. [2022-12-13 21:10:11,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 141 flow [2022-12-13 21:10:11,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:10:11,629 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 70 flow [2022-12-13 21:10:11,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-12-13 21:10:11,633 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2022-12-13 21:10:11,633 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 70 flow [2022-12-13 21:10:11,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:11,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:10:11,633 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:10:11,634 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 21:10:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1916792657, now seen corresponding path program 1 times [2022-12-13 21:10:11,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908080804] [2022-12-13 21:10:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908080804] [2022-12-13 21:10:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908080804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:10:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603535118] [2022-12-13 21:10:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:11,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:11,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:10:11,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:10:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:10:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:10:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:12,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:10:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:12,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603535118] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:10:12,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:10:12,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-12-13 21:10:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527635058] [2022-12-13 21:10:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:10:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 21:10:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 21:10:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:10:12,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2022-12-13 21:10:12,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 70 flow. Second operand has 10 states, 10 states have (on average 68.0) internal successors, (680), 10 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:12,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:10:12,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2022-12-13 21:10:12,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:10:12,482 INFO L130 PetriNetUnfolder]: 111/200 cut-off events. [2022-12-13 21:10:12,482 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-12-13 21:10:12,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 200 events. 111/200 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 545 event pairs, 4 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 161. Up to 66 conditions per place. [2022-12-13 21:10:12,484 INFO L137 encePairwiseOnDemand]: 151/160 looper letters, 44 selfloop transitions, 18 changer transitions 0/62 dead transitions. [2022-12-13 21:10:12,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 307 flow [2022-12-13 21:10:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:10:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:10:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 848 transitions. [2022-12-13 21:10:12,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2022-12-13 21:10:12,487 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 848 transitions. [2022-12-13 21:10:12,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 848 transitions. [2022-12-13 21:10:12,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:10:12,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 848 transitions. [2022-12-13 21:10:12,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 70.66666666666667) internal successors, (848), 12 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:12,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 160.0) internal successors, (2080), 13 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:12,494 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 160.0) internal successors, (2080), 13 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:12,494 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 70 flow. Second operand 12 states and 848 transitions. [2022-12-13 21:10:12,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 307 flow [2022-12-13 21:10:12,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:10:12,496 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 174 flow [2022-12-13 21:10:12,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2022-12-13 21:10:12,497 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2022-12-13 21:10:12,497 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 174 flow [2022-12-13 21:10:12,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.0) internal successors, (680), 10 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:12,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:10:12,497 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:12,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:10:12,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:12,699 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 21:10:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:12,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1702346565, now seen corresponding path program 1 times [2022-12-13 21:10:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843389914] [2022-12-13 21:10:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:13,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843389914] [2022-12-13 21:10:13,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843389914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:10:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82909] [2022-12-13 21:10:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:13,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:13,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:10:13,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:10:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 21:10:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:10:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:14,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:10:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:14,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:10:14,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:10:14,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 21:10:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322630982] [2022-12-13 21:10:14,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:10:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:10:14,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:10:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-12-13 21:10:14,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2022-12-13 21:10:14,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 174 flow. Second operand has 19 states, 19 states have (on average 61.1578947368421) internal successors, (1162), 19 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:14,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:10:14,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2022-12-13 21:10:14,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:10:20,622 INFO L130 PetriNetUnfolder]: 506/912 cut-off events. [2022-12-13 21:10:20,622 INFO L131 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2022-12-13 21:10:20,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3171 conditions, 912 events. 506/912 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4256 event pairs, 12 based on Foata normal form. 13/925 useless extension candidates. Maximal degree in co-relation 1486. Up to 221 conditions per place. [2022-12-13 21:10:20,628 INFO L137 encePairwiseOnDemand]: 150/160 looper letters, 110 selfloop transitions, 137 changer transitions 57/304 dead transitions. [2022-12-13 21:10:20,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 304 transitions, 2070 flow [2022-12-13 21:10:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 21:10:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 21:10:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3518 transitions. [2022-12-13 21:10:20,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3997727272727273 [2022-12-13 21:10:20,635 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3518 transitions. [2022-12-13 21:10:20,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3518 transitions. [2022-12-13 21:10:20,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:10:20,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3518 transitions. [2022-12-13 21:10:20,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 63.96363636363636) internal successors, (3518), 55 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:20,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 160.0) internal successors, (8960), 56 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:20,654 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 160.0) internal successors, (8960), 56 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:20,654 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 174 flow. Second operand 55 states and 3518 transitions. [2022-12-13 21:10:20,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 304 transitions, 2070 flow [2022-12-13 21:10:20,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 304 transitions, 2007 flow, removed 25 selfloop flow, removed 3 redundant places. [2022-12-13 21:10:20,670 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 1408 flow [2022-12-13 21:10:20,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1408, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2022-12-13 21:10:20,671 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 92 predicate places. [2022-12-13 21:10:20,671 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 1408 flow [2022-12-13 21:10:20,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.1578947368421) internal successors, (1162), 19 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:20,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:10:20,672 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:20,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:10:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:20,874 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 21:10:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash -31439599, now seen corresponding path program 1 times [2022-12-13 21:10:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:20,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081470143] [2022-12-13 21:10:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:22,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081470143] [2022-12-13 21:10:22,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081470143] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:10:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174769433] [2022-12-13 21:10:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:22,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:22,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:10:22,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:10:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 21:10:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:10:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:22,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:10:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:24,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174769433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:10:24,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:10:24,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 21:10:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636221017] [2022-12-13 21:10:24,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:10:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 21:10:24,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 21:10:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-12-13 21:10:25,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 160 [2022-12-13 21:10:25,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 1408 flow. Second operand has 24 states, 24 states have (on average 65.04166666666667) internal successors, (1561), 24 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:25,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:10:25,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 160 [2022-12-13 21:10:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:10:35,954 INFO L130 PetriNetUnfolder]: 1046/1849 cut-off events. [2022-12-13 21:10:35,954 INFO L131 PetriNetUnfolder]: For 13378/13390 co-relation queries the response was YES. [2022-12-13 21:10:35,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9049 conditions, 1849 events. 1046/1849 cut-off events. For 13378/13390 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9942 event pairs, 6 based on Foata normal form. 17/1864 useless extension candidates. Maximal degree in co-relation 8925. Up to 477 conditions per place. [2022-12-13 21:10:35,965 INFO L137 encePairwiseOnDemand]: 152/160 looper letters, 230 selfloop transitions, 290 changer transitions 67/592 dead transitions. [2022-12-13 21:10:35,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 592 transitions, 5760 flow [2022-12-13 21:10:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 21:10:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-13 21:10:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3883 transitions. [2022-12-13 21:10:35,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4257675438596491 [2022-12-13 21:10:35,971 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3883 transitions. [2022-12-13 21:10:35,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3883 transitions. [2022-12-13 21:10:35,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:10:35,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3883 transitions. [2022-12-13 21:10:35,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 68.12280701754386) internal successors, (3883), 57 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:35,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 160.0) internal successors, (9280), 58 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:35,987 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 160.0) internal successors, (9280), 58 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:35,987 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 1408 flow. Second operand 57 states and 3883 transitions. [2022-12-13 21:10:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 592 transitions, 5760 flow [2022-12-13 21:10:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 592 transitions, 4903 flow, removed 414 selfloop flow, removed 15 redundant places. [2022-12-13 21:10:36,038 INFO L231 Difference]: Finished difference. Result has 165 places, 381 transitions, 3488 flow [2022-12-13 21:10:36,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=3488, PETRI_PLACES=165, PETRI_TRANSITIONS=381} [2022-12-13 21:10:36,039 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 143 predicate places. [2022-12-13 21:10:36,039 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 381 transitions, 3488 flow [2022-12-13 21:10:36,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 65.04166666666667) internal successors, (1561), 24 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:36,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:10:36,040 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:36,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:10:36,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:36,242 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 21:10:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash -878114455, now seen corresponding path program 2 times [2022-12-13 21:10:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414053708] [2022-12-13 21:10:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:36,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:37,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:37,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414053708] [2022-12-13 21:10:37,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414053708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:10:37,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185045534] [2022-12-13 21:10:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:10:37,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:37,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:10:37,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:10:37,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:10:37,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:10:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 21:10:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:10:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:37,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:10:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:39,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185045534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:10:39,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:10:39,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 21:10:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130443149] [2022-12-13 21:10:39,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:10:39,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 21:10:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:39,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 21:10:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-12-13 21:10:40,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 160 [2022-12-13 21:10:40,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 381 transitions, 3488 flow. Second operand has 24 states, 24 states have (on average 65.08333333333333) internal successors, (1562), 24 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:40,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:10:40,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 160 [2022-12-13 21:10:40,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:10:48,254 INFO L130 PetriNetUnfolder]: 1511/2694 cut-off events. [2022-12-13 21:10:48,254 INFO L131 PetriNetUnfolder]: For 17458/17478 co-relation queries the response was YES. [2022-12-13 21:10:48,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12950 conditions, 2694 events. 1511/2694 cut-off events. For 17458/17478 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15801 event pairs, 2 based on Foata normal form. 31/2721 useless extension candidates. Maximal degree in co-relation 12812. Up to 547 conditions per place. [2022-12-13 21:10:48,270 INFO L137 encePairwiseOnDemand]: 152/160 looper letters, 246 selfloop transitions, 400 changer transitions 121/772 dead transitions. [2022-12-13 21:10:48,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 772 transitions, 7901 flow [2022-12-13 21:10:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 21:10:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 21:10:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3429 transitions. [2022-12-13 21:10:48,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.428625 [2022-12-13 21:10:48,275 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3429 transitions. [2022-12-13 21:10:48,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3429 transitions. [2022-12-13 21:10:48,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:10:48,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3429 transitions. [2022-12-13 21:10:48,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 68.58) internal successors, (3429), 50 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:48,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 160.0) internal successors, (8160), 51 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:48,286 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 160.0) internal successors, (8160), 51 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:48,286 INFO L175 Difference]: Start difference. First operand has 165 places, 381 transitions, 3488 flow. Second operand 50 states and 3429 transitions. [2022-12-13 21:10:48,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 772 transitions, 7901 flow [2022-12-13 21:10:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 772 transitions, 7084 flow, removed 243 selfloop flow, removed 17 redundant places. [2022-12-13 21:10:48,409 INFO L231 Difference]: Finished difference. Result has 213 places, 522 transitions, 5472 flow [2022-12-13 21:10:48,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=5472, PETRI_PLACES=213, PETRI_TRANSITIONS=522} [2022-12-13 21:10:48,410 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 191 predicate places. [2022-12-13 21:10:48,410 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 522 transitions, 5472 flow [2022-12-13 21:10:48,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 65.08333333333333) internal successors, (1562), 24 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:48,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:10:48,411 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:48,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:10:48,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:48,613 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 21:10:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1198780035, now seen corresponding path program 3 times [2022-12-13 21:10:48,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:48,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450014847] [2022-12-13 21:10:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:48,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:49,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:49,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450014847] [2022-12-13 21:10:49,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450014847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:10:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790507887] [2022-12-13 21:10:49,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:10:49,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:10:49,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:49,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:10:49,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:10:49,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:10:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:10:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 21:10:49,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:10:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:50,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:10:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:52,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790507887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:10:52,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:10:52,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 21:10:52,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970854153] [2022-12-13 21:10:52,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:10:52,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 21:10:52,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 21:10:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-12-13 21:10:52,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2022-12-13 21:10:52,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 522 transitions, 5472 flow. Second operand has 28 states, 28 states have (on average 60.892857142857146) internal successors, (1705), 28 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:10:52,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:10:52,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2022-12-13 21:10:52,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:11:17,789 INFO L130 PetriNetUnfolder]: 1976/3467 cut-off events. [2022-12-13 21:11:17,789 INFO L131 PetriNetUnfolder]: For 13552/13552 co-relation queries the response was YES. [2022-12-13 21:11:17,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17528 conditions, 3467 events. 1976/3467 cut-off events. For 13552/13552 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21201 event pairs, 14 based on Foata normal form. 16/3477 useless extension candidates. Maximal degree in co-relation 17446. Up to 846 conditions per place. [2022-12-13 21:11:17,808 INFO L137 encePairwiseOnDemand]: 150/160 looper letters, 293 selfloop transitions, 529 changer transitions 137/959 dead transitions. [2022-12-13 21:11:17,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 959 transitions, 10938 flow [2022-12-13 21:11:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 21:11:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-13 21:11:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4042 transitions. [2022-12-13 21:11:17,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4009920634920635 [2022-12-13 21:11:17,812 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4042 transitions. [2022-12-13 21:11:17,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4042 transitions. [2022-12-13 21:11:17,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:11:17,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4042 transitions. [2022-12-13 21:11:17,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 64.15873015873017) internal successors, (4042), 63 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:17,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 160.0) internal successors, (10240), 64 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:17,825 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 160.0) internal successors, (10240), 64 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:17,825 INFO L175 Difference]: Start difference. First operand has 213 places, 522 transitions, 5472 flow. Second operand 63 states and 4042 transitions. [2022-12-13 21:11:17,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 959 transitions, 10938 flow [2022-12-13 21:11:17,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 959 transitions, 10608 flow, removed 128 selfloop flow, removed 23 redundant places. [2022-12-13 21:11:17,944 INFO L231 Difference]: Finished difference. Result has 256 places, 684 transitions, 8379 flow [2022-12-13 21:11:17,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=8379, PETRI_PLACES=256, PETRI_TRANSITIONS=684} [2022-12-13 21:11:17,945 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 234 predicate places. [2022-12-13 21:11:17,945 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 684 transitions, 8379 flow [2022-12-13 21:11:17,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 60.892857142857146) internal successors, (1705), 28 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:17,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:11:17,946 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:17,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 21:11:18,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:18,147 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 21:11:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1237328473, now seen corresponding path program 4 times [2022-12-13 21:11:18,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:18,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868598275] [2022-12-13 21:11:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868598275] [2022-12-13 21:11:18,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868598275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838402620] [2022-12-13 21:11:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:11:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:18,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:11:19,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:11:19,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:11:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 21:11:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:20,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:11:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:21,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838402620] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:11:21,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:11:21,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2022-12-13 21:11:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210526442] [2022-12-13 21:11:21,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:11:21,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 21:11:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 21:11:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-12-13 21:11:21,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2022-12-13 21:11:21,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 684 transitions, 8379 flow. Second operand has 27 states, 27 states have (on average 60.96296296296296) internal successors, (1646), 27 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:21,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:11:21,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2022-12-13 21:11:21,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:11:54,231 INFO L130 PetriNetUnfolder]: 2625/4565 cut-off events. [2022-12-13 21:11:54,231 INFO L131 PetriNetUnfolder]: For 23252/23252 co-relation queries the response was YES. [2022-12-13 21:11:54,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25777 conditions, 4565 events. 2625/4565 cut-off events. For 23252/23252 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29388 event pairs, 26 based on Foata normal form. 15/4574 useless extension candidates. Maximal degree in co-relation 25488. Up to 1064 conditions per place. [2022-12-13 21:11:54,260 INFO L137 encePairwiseOnDemand]: 150/160 looper letters, 323 selfloop transitions, 835 changer transitions 112/1270 dead transitions. [2022-12-13 21:11:54,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1270 transitions, 16759 flow [2022-12-13 21:11:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 21:11:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-12-13 21:11:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4976 transitions. [2022-12-13 21:11:54,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39871794871794874 [2022-12-13 21:11:54,265 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4976 transitions. [2022-12-13 21:11:54,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4976 transitions. [2022-12-13 21:11:54,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:11:54,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4976 transitions. [2022-12-13 21:11:54,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 63.794871794871796) internal successors, (4976), 78 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:54,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 160.0) internal successors, (12640), 79 states have internal predecessors, (12640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:54,283 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 160.0) internal successors, (12640), 79 states have internal predecessors, (12640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:54,283 INFO L175 Difference]: Start difference. First operand has 256 places, 684 transitions, 8379 flow. Second operand 78 states and 4976 transitions. [2022-12-13 21:11:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1270 transitions, 16759 flow [2022-12-13 21:11:54,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1270 transitions, 16084 flow, removed 291 selfloop flow, removed 18 redundant places. [2022-12-13 21:11:54,527 INFO L231 Difference]: Finished difference. Result has 325 places, 1000 transitions, 14426 flow [2022-12-13 21:11:54,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=8097, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=14426, PETRI_PLACES=325, PETRI_TRANSITIONS=1000} [2022-12-13 21:11:54,528 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 303 predicate places. [2022-12-13 21:11:54,528 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1000 transitions, 14426 flow [2022-12-13 21:11:54,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 60.96296296296296) internal successors, (1646), 27 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:54,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:11:54,528 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:54,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:11:54,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 21:11:54,730 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 21:11:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash -482628173, now seen corresponding path program 5 times [2022-12-13 21:11:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994193320] [2022-12-13 21:11:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:55,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994193320] [2022-12-13 21:11:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994193320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251897480] [2022-12-13 21:11:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:11:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:55,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:55,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:11:55,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 21:11:55,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:11:55,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 21:11:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:56,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:11:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251897480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:11:58,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:11:58,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2022-12-13 21:11:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098398227] [2022-12-13 21:11:58,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:11:58,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 21:11:58,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 21:11:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-12-13 21:11:59,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 160 [2022-12-13 21:11:59,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1000 transitions, 14426 flow. Second operand has 27 states, 27 states have (on average 64.85185185185185) internal successors, (1751), 27 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:11:59,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:11:59,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 160 [2022-12-13 21:11:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:12:04,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:12:18,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:12:35,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:12:44,286 INFO L130 PetriNetUnfolder]: 3206/5601 cut-off events. [2022-12-13 21:12:44,286 INFO L131 PetriNetUnfolder]: For 31542/31554 co-relation queries the response was YES. [2022-12-13 21:12:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35291 conditions, 5601 events. 3206/5601 cut-off events. For 31542/31554 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37832 event pairs, 12 based on Foata normal form. 35/5634 useless extension candidates. Maximal degree in co-relation 34991. Up to 1766 conditions per place. [2022-12-13 21:12:44,325 INFO L137 encePairwiseOnDemand]: 152/160 looper letters, 493 selfloop transitions, 895 changer transitions 127/1520 dead transitions. [2022-12-13 21:12:44,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1520 transitions, 23023 flow [2022-12-13 21:12:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 21:12:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-13 21:12:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4956 transitions. [2022-12-13 21:12:44,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4243150684931507 [2022-12-13 21:12:44,330 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4956 transitions. [2022-12-13 21:12:44,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4956 transitions. [2022-12-13 21:12:44,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:12:44,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4956 transitions. [2022-12-13 21:12:44,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 67.89041095890411) internal successors, (4956), 73 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:12:44,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 160.0) internal successors, (11840), 74 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:12:44,342 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 160.0) internal successors, (11840), 74 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:12:44,342 INFO L175 Difference]: Start difference. First operand has 325 places, 1000 transitions, 14426 flow. Second operand 73 states and 4956 transitions. [2022-12-13 21:12:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1520 transitions, 23023 flow [2022-12-13 21:12:44,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1520 transitions, 22199 flow, removed 366 selfloop flow, removed 18 redundant places. [2022-12-13 21:12:44,886 INFO L231 Difference]: Finished difference. Result has 389 places, 1220 transitions, 19295 flow [2022-12-13 21:12:44,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=13893, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=19295, PETRI_PLACES=389, PETRI_TRANSITIONS=1220} [2022-12-13 21:12:44,887 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 367 predicate places. [2022-12-13 21:12:44,887 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1220 transitions, 19295 flow [2022-12-13 21:12:44,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 64.85185185185185) internal successors, (1751), 27 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:12:44,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:12:44,887 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:44,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:12:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:45,089 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 21:12:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1598701977, now seen corresponding path program 6 times [2022-12-13 21:12:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:45,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230548089] [2022-12-13 21:12:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:12:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230548089] [2022-12-13 21:12:46,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230548089] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:12:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956462476] [2022-12-13 21:12:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:12:46,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:12:46,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:12:46,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:12:46,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 21:12:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:12:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 21:12:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:12:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:12:47,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:12:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:12:48,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956462476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:12:48,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:12:48,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-13 21:12:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111391128] [2022-12-13 21:12:48,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:12:48,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 21:12:48,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 21:12:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-12-13 21:12:50,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 160 [2022-12-13 21:12:50,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1220 transitions, 19295 flow. Second operand has 22 states, 22 states have (on average 65.27272727272727) internal successors, (1436), 22 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:12:50,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:12:50,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 160 [2022-12-13 21:12:50,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:13:04,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:13:17,541 INFO L130 PetriNetUnfolder]: 3861/6706 cut-off events. [2022-12-13 21:13:17,542 INFO L131 PetriNetUnfolder]: For 47225/47237 co-relation queries the response was YES. [2022-12-13 21:13:17,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45141 conditions, 6706 events. 3861/6706 cut-off events. For 47225/47237 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46504 event pairs, 126 based on Foata normal form. 25/6729 useless extension candidates. Maximal degree in co-relation 44606. Up to 2233 conditions per place. [2022-12-13 21:13:17,605 INFO L137 encePairwiseOnDemand]: 152/160 looper letters, 487 selfloop transitions, 1173 changer transitions 77/1742 dead transitions. [2022-12-13 21:13:17,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1742 transitions, 29421 flow [2022-12-13 21:13:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 21:13:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 21:13:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3732 transitions. [2022-12-13 21:13:17,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4240909090909091 [2022-12-13 21:13:17,610 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3732 transitions. [2022-12-13 21:13:17,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3732 transitions. [2022-12-13 21:13:17,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:13:17,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3732 transitions. [2022-12-13 21:13:17,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 67.85454545454546) internal successors, (3732), 55 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:17,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 160.0) internal successors, (8960), 56 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:17,646 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 160.0) internal successors, (8960), 56 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:17,646 INFO L175 Difference]: Start difference. First operand has 389 places, 1220 transitions, 19295 flow. Second operand 55 states and 3732 transitions. [2022-12-13 21:13:17,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1742 transitions, 29421 flow [2022-12-13 21:13:18,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1742 transitions, 28918 flow, removed 219 selfloop flow, removed 23 redundant places. [2022-12-13 21:13:18,567 INFO L231 Difference]: Finished difference. Result has 435 places, 1523 transitions, 27886 flow [2022-12-13 21:13:18,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=18928, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=894, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=27886, PETRI_PLACES=435, PETRI_TRANSITIONS=1523} [2022-12-13 21:13:18,570 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 413 predicate places. [2022-12-13 21:13:18,570 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 1523 transitions, 27886 flow [2022-12-13 21:13:18,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.27272727272727) internal successors, (1436), 22 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:18,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:13:18,571 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:13:18,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 21:13:18,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:13:18,772 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 21:13:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:13:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 769424589, now seen corresponding path program 7 times [2022-12-13 21:13:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:13:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284412195] [2022-12-13 21:13:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:13:18,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:13:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:13:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:13:19,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:13:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284412195] [2022-12-13 21:13:19,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284412195] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:13:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946273584] [2022-12-13 21:13:19,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 21:13:19,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:13:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:13:19,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:13:19,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:13:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:13:19,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 21:13:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:13:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:13:20,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:13:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:13:22,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946273584] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:13:22,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:13:22,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 21:13:22,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088021800] [2022-12-13 21:13:22,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:13:22,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 21:13:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:13:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 21:13:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-13 21:13:24,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 160 [2022-12-13 21:13:24,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1523 transitions, 27886 flow. Second operand has 24 states, 24 states have (on average 65.08333333333333) internal successors, (1562), 24 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:24,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:13:24,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 160 [2022-12-13 21:13:24,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:13:38,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:13:49,603 INFO L130 PetriNetUnfolder]: 4601/8009 cut-off events. [2022-12-13 21:13:49,603 INFO L131 PetriNetUnfolder]: For 90220/90232 co-relation queries the response was YES. [2022-12-13 21:13:49,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60347 conditions, 8009 events. 4601/8009 cut-off events. For 90220/90232 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 57108 event pairs, 20 based on Foata normal form. 28/8035 useless extension candidates. Maximal degree in co-relation 60035. Up to 2478 conditions per place. [2022-12-13 21:13:49,671 INFO L137 encePairwiseOnDemand]: 152/160 looper letters, 584 selfloop transitions, 1356 changer transitions 91/2036 dead transitions. [2022-12-13 21:13:49,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2036 transitions, 39412 flow [2022-12-13 21:13:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 21:13:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 21:13:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3539 transitions. [2022-12-13 21:13:49,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42536057692307694 [2022-12-13 21:13:49,675 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3539 transitions. [2022-12-13 21:13:49,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3539 transitions. [2022-12-13 21:13:49,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:13:49,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3539 transitions. [2022-12-13 21:13:49,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 68.0576923076923) internal successors, (3539), 52 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:49,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 160.0) internal successors, (8480), 53 states have internal predecessors, (8480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:49,683 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 160.0) internal successors, (8480), 53 states have internal predecessors, (8480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:49,684 INFO L175 Difference]: Start difference. First operand has 435 places, 1523 transitions, 27886 flow. Second operand 52 states and 3539 transitions. [2022-12-13 21:13:49,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2036 transitions, 39412 flow [2022-12-13 21:13:51,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 2036 transitions, 38855 flow, removed 256 selfloop flow, removed 14 redundant places. [2022-12-13 21:13:51,462 INFO L231 Difference]: Finished difference. Result has 487 places, 1780 transitions, 36944 flow [2022-12-13 21:13:51,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=27489, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=36944, PETRI_PLACES=487, PETRI_TRANSITIONS=1780} [2022-12-13 21:13:51,463 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 465 predicate places. [2022-12-13 21:13:51,463 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1780 transitions, 36944 flow [2022-12-13 21:13:51,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 65.08333333333333) internal successors, (1562), 24 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:51,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:13:51,464 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:13:51,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:13:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:13:51,664 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 21:13:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:13:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash -73436192, now seen corresponding path program 8 times [2022-12-13 21:13:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:13:51,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505389965] [2022-12-13 21:13:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:13:51,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:13:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:13:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:13:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:13:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505389965] [2022-12-13 21:13:53,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505389965] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:13:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631478367] [2022-12-13 21:13:53,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:13:53,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:13:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:13:53,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:13:53,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:13:53,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:13:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:13:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:13:53,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:13:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:13:54,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:13:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:13:58,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631478367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:13:58,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:13:58,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-12-13 21:13:58,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414841024] [2022-12-13 21:13:58,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:13:58,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 21:13:58,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:13:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 21:13:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-12-13 21:13:59,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2022-12-13 21:13:59,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1780 transitions, 36944 flow. Second operand has 28 states, 28 states have (on average 61.107142857142854) internal successors, (1711), 28 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:13:59,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:13:59,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2022-12-13 21:13:59,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:14:09,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:14:57,485 INFO L130 PetriNetUnfolder]: 5371/9416 cut-off events. [2022-12-13 21:14:57,486 INFO L131 PetriNetUnfolder]: For 141738/141738 co-relation queries the response was YES. [2022-12-13 21:14:57,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77099 conditions, 9416 events. 5371/9416 cut-off events. For 141738/141738 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 69789 event pairs, 30 based on Foata normal form. 22/9438 useless extension candidates. Maximal degree in co-relation 76738. Up to 3476 conditions per place. [2022-12-13 21:14:57,596 INFO L137 encePairwiseOnDemand]: 150/160 looper letters, 720 selfloop transitions, 1552 changer transitions 176/2448 dead transitions. [2022-12-13 21:14:57,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 2448 transitions, 52267 flow [2022-12-13 21:14:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-13 21:14:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-12-13 21:14:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5775 transitions. [2022-12-13 21:14:57,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2022-12-13 21:14:57,602 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5775 transitions. [2022-12-13 21:14:57,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5775 transitions. [2022-12-13 21:14:57,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:14:57,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5775 transitions. [2022-12-13 21:14:57,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 63.46153846153846) internal successors, (5775), 91 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:14:57,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 160.0) internal successors, (14720), 92 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:14:57,618 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 160.0) internal successors, (14720), 92 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:14:57,618 INFO L175 Difference]: Start difference. First operand has 487 places, 1780 transitions, 36944 flow. Second operand 91 states and 5775 transitions. [2022-12-13 21:14:57,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 2448 transitions, 52267 flow [2022-12-13 21:15:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 2448 transitions, 51674 flow, removed 263 selfloop flow, removed 19 redundant places. [2022-12-13 21:15:00,653 INFO L231 Difference]: Finished difference. Result has 579 places, 2116 transitions, 47185 flow [2022-12-13 21:15:00,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=36571, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=47185, PETRI_PLACES=579, PETRI_TRANSITIONS=2116} [2022-12-13 21:15:00,654 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 557 predicate places. [2022-12-13 21:15:00,654 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 2116 transitions, 47185 flow [2022-12-13 21:15:00,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.107142857142854) internal successors, (1711), 28 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:00,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:15:00,655 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:15:00,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:15:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:15:00,856 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 21:15:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:15:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1396898128, now seen corresponding path program 9 times [2022-12-13 21:15:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:15:00,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523617194] [2022-12-13 21:15:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:15:00,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:15:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:15:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:15:00,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:15:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523617194] [2022-12-13 21:15:00,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523617194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:15:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413913233] [2022-12-13 21:15:00,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:15:00,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:15:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:15:00,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:15:00,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:15:01,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:15:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:15:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 21:15:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:15:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:15:01,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:15:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 21:15:01,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413913233] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:15:01,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:15:01,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2022-12-13 21:15:01,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322768083] [2022-12-13 21:15:01,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:15:01,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:15:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:15:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:15:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:15:01,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 160 [2022-12-13 21:15:01,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 2116 transitions, 47185 flow. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:01,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:15:01,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 160 [2022-12-13 21:15:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:15:05,824 INFO L130 PetriNetUnfolder]: 5103/8788 cut-off events. [2022-12-13 21:15:05,824 INFO L131 PetriNetUnfolder]: For 155193/155193 co-relation queries the response was YES. [2022-12-13 21:15:05,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79630 conditions, 8788 events. 5103/8788 cut-off events. For 155193/155193 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 63386 event pairs, 783 based on Foata normal form. 92/8880 useless extension candidates. Maximal degree in co-relation 79388. Up to 2820 conditions per place. [2022-12-13 21:15:05,920 INFO L137 encePairwiseOnDemand]: 153/160 looper letters, 682 selfloop transitions, 1626 changer transitions 0/2308 dead transitions. [2022-12-13 21:15:05,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 2308 transitions, 56096 flow [2022-12-13 21:15:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:15:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:15:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 513 transitions. [2022-12-13 21:15:05,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45803571428571427 [2022-12-13 21:15:05,922 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 513 transitions. [2022-12-13 21:15:05,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 513 transitions. [2022-12-13 21:15:05,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:15:05,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 513 transitions. [2022-12-13 21:15:05,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:05,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:05,924 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:05,924 INFO L175 Difference]: Start difference. First operand has 579 places, 2116 transitions, 47185 flow. Second operand 7 states and 513 transitions. [2022-12-13 21:15:05,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 2308 transitions, 56096 flow [2022-12-13 21:15:09,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2308 transitions, 55283 flow, removed 385 selfloop flow, removed 25 redundant places. [2022-12-13 21:15:09,045 INFO L231 Difference]: Finished difference. Result has 540 places, 2264 transitions, 56530 flow [2022-12-13 21:15:09,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=46458, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1487, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=56530, PETRI_PLACES=540, PETRI_TRANSITIONS=2264} [2022-12-13 21:15:09,046 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 518 predicate places. [2022-12-13 21:15:09,046 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2264 transitions, 56530 flow [2022-12-13 21:15:09,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:09,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:15:09,047 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:15:09,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 21:15:09,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 21:15:09,248 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 21:15:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:15:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash 452075068, now seen corresponding path program 10 times [2022-12-13 21:15:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:15:09,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261655499] [2022-12-13 21:15:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:15:09,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:15:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:15:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:15:09,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:15:09,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261655499] [2022-12-13 21:15:09,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261655499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:15:09,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693142312] [2022-12-13 21:15:09,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:15:09,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:15:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:15:09,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:15:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 21:15:09,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:15:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:15:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 21:15:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:15:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:15:09,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:15:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:15:09,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693142312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:15:09,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:15:09,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-12-13 21:15:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809320326] [2022-12-13 21:15:09,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:15:09,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 21:15:09,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:15:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 21:15:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:15:09,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 160 [2022-12-13 21:15:09,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2264 transitions, 56530 flow. Second operand has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:09,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:15:09,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 160 [2022-12-13 21:15:09,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:15:14,608 INFO L130 PetriNetUnfolder]: 5059/8610 cut-off events. [2022-12-13 21:15:14,608 INFO L131 PetriNetUnfolder]: For 190962/190962 co-relation queries the response was YES. [2022-12-13 21:15:14,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85703 conditions, 8610 events. 5059/8610 cut-off events. For 190962/190962 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 60880 event pairs, 30 based on Foata normal form. 132/8742 useless extension candidates. Maximal degree in co-relation 85037. Up to 2312 conditions per place. [2022-12-13 21:15:14,723 INFO L137 encePairwiseOnDemand]: 152/160 looper letters, 648 selfloop transitions, 1764 changer transitions 0/2412 dead transitions. [2022-12-13 21:15:14,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 2412 transitions, 64433 flow [2022-12-13 21:15:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 21:15:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 21:15:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 892 transitions. [2022-12-13 21:15:14,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4288461538461538 [2022-12-13 21:15:14,726 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 892 transitions. [2022-12-13 21:15:14,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 892 transitions. [2022-12-13 21:15:14,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:15:14,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 892 transitions. [2022-12-13 21:15:14,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.61538461538461) internal successors, (892), 13 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:14,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:14,729 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:14,729 INFO L175 Difference]: Start difference. First operand has 540 places, 2264 transitions, 56530 flow. Second operand 13 states and 892 transitions. [2022-12-13 21:15:14,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 2412 transitions, 64433 flow [2022-12-13 21:15:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 2412 transitions, 64164 flow, removed 89 selfloop flow, removed 3 redundant places. [2022-12-13 21:15:18,105 INFO L231 Difference]: Finished difference. Result has 544 places, 2374 transitions, 66278 flow [2022-12-13 21:15:18,106 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=54500, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=66278, PETRI_PLACES=544, PETRI_TRANSITIONS=2374} [2022-12-13 21:15:18,106 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 522 predicate places. [2022-12-13 21:15:18,106 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 2374 transitions, 66278 flow [2022-12-13 21:15:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:18,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:15:18,107 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:15:18,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 21:15:18,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:15:18,308 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 21:15:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:15:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash -939240634, now seen corresponding path program 11 times [2022-12-13 21:15:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:15:18,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520657107] [2022-12-13 21:15:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:15:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:15:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:15:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:15:18,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:15:18,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520657107] [2022-12-13 21:15:18,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520657107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:15:18,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375346956] [2022-12-13 21:15:18,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:15:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:15:18,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:15:18,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:15:18,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 21:15:18,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 21:15:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:15:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 21:15:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:15:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:15:18,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:15:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:15:18,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375346956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:15:18,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:15:18,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-12-13 21:15:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262323950] [2022-12-13 21:15:18,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:15:18,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 21:15:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:15:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 21:15:18,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:15:18,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 160 [2022-12-13 21:15:18,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 2374 transitions, 66278 flow. Second operand has 9 states, 9 states have (on average 70.22222222222223) internal successors, (632), 9 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:18,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:15:18,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 160 [2022-12-13 21:15:18,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:15:25,623 INFO L130 PetriNetUnfolder]: 6201/10584 cut-off events. [2022-12-13 21:15:25,623 INFO L131 PetriNetUnfolder]: For 272884/272884 co-relation queries the response was YES. [2022-12-13 21:15:25,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116040 conditions, 10584 events. 6201/10584 cut-off events. For 272884/272884 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 77838 event pairs, 233 based on Foata normal form. 12/10596 useless extension candidates. Maximal degree in co-relation 114994. Up to 2948 conditions per place. [2022-12-13 21:15:25,759 INFO L137 encePairwiseOnDemand]: 151/160 looper letters, 526 selfloop transitions, 2455 changer transitions 1/2982 dead transitions. [2022-12-13 21:15:25,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 2982 transitions, 87924 flow [2022-12-13 21:15:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 21:15:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 21:15:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1377 transitions. [2022-12-13 21:15:25,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4529605263157895 [2022-12-13 21:15:25,762 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1377 transitions. [2022-12-13 21:15:25,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1377 transitions. [2022-12-13 21:15:25,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:15:25,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1377 transitions. [2022-12-13 21:15:25,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 72.47368421052632) internal successors, (1377), 19 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:25,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 160.0) internal successors, (3200), 20 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:25,765 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 160.0) internal successors, (3200), 20 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:25,765 INFO L175 Difference]: Start difference. First operand has 544 places, 2374 transitions, 66278 flow. Second operand 19 states and 1377 transitions. [2022-12-13 21:15:25,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 2982 transitions, 87924 flow [2022-12-13 21:15:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2982 transitions, 87566 flow, removed 142 selfloop flow, removed 8 redundant places. [2022-12-13 21:15:32,054 INFO L231 Difference]: Finished difference. Result has 563 places, 2860 transitions, 87318 flow [2022-12-13 21:15:32,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=66034, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=87318, PETRI_PLACES=563, PETRI_TRANSITIONS=2860} [2022-12-13 21:15:32,055 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 541 predicate places. [2022-12-13 21:15:32,055 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 2860 transitions, 87318 flow [2022-12-13 21:15:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 70.22222222222223) internal successors, (632), 9 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:32,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:15:32,056 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:15:32,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 21:15:32,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 21:15:32,257 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 21:15:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:15:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash 747847828, now seen corresponding path program 12 times [2022-12-13 21:15:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:15:32,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303072627] [2022-12-13 21:15:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:15:32,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:15:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:15:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:15:34,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:15:34,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303072627] [2022-12-13 21:15:34,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303072627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:15:34,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125037593] [2022-12-13 21:15:34,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:15:34,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:15:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:15:34,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:15:34,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 21:15:35,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 21:15:35,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:15:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 21:15:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:15:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:15:36,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:15:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:15:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125037593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:15:41,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:15:41,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-12-13 21:15:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628366070] [2022-12-13 21:15:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:15:41,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 21:15:41,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:15:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 21:15:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=761, Unknown=1, NotChecked=0, Total=930 [2022-12-13 21:15:45,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:15:45,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 160 [2022-12-13 21:15:45,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2860 transitions, 87318 flow. Second operand has 31 states, 31 states have (on average 58.903225806451616) internal successors, (1826), 31 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:15:45,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:15:45,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 160 [2022-12-13 21:15:45,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:16:32,342 INFO L130 PetriNetUnfolder]: 7908/13626 cut-off events. [2022-12-13 21:16:32,342 INFO L131 PetriNetUnfolder]: For 396113/396113 co-relation queries the response was YES. [2022-12-13 21:16:32,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160133 conditions, 13626 events. 7908/13626 cut-off events. For 396113/396113 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 104626 event pairs, 5 based on Foata normal form. 31/13657 useless extension candidates. Maximal degree in co-relation 158514. Up to 3832 conditions per place. [2022-12-13 21:16:32,534 INFO L137 encePairwiseOnDemand]: 150/160 looper letters, 679 selfloop transitions, 3093 changer transitions 155/3927 dead transitions. [2022-12-13 21:16:32,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 3927 transitions, 120771 flow [2022-12-13 21:16:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-12-13 21:16:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-12-13 21:16:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 6303 transitions. [2022-12-13 21:16:32,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38621323529411766 [2022-12-13 21:16:32,541 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 6303 transitions. [2022-12-13 21:16:32,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 6303 transitions. [2022-12-13 21:16:32,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:16:32,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 6303 transitions. [2022-12-13 21:16:32,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 61.794117647058826) internal successors, (6303), 102 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:16:32,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 160.0) internal successors, (16480), 103 states have internal predecessors, (16480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:16:32,558 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 160.0) internal successors, (16480), 103 states have internal predecessors, (16480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:16:32,558 INFO L175 Difference]: Start difference. First operand has 563 places, 2860 transitions, 87318 flow. Second operand 102 states and 6303 transitions. [2022-12-13 21:16:32,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 3927 transitions, 120771 flow [2022-12-13 21:16:42,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 3927 transitions, 120097 flow, removed 270 selfloop flow, removed 4 redundant places. [2022-12-13 21:16:42,380 INFO L231 Difference]: Finished difference. Result has 705 places, 3571 transitions, 117861 flow [2022-12-13 21:16:42,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=86994, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=117861, PETRI_PLACES=705, PETRI_TRANSITIONS=3571} [2022-12-13 21:16:42,382 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 683 predicate places. [2022-12-13 21:16:42,382 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 3571 transitions, 117861 flow [2022-12-13 21:16:42,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 58.903225806451616) internal successors, (1826), 31 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:16:42,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:16:42,382 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:16:42,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 21:16:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 21:16:42,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:16:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:16:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1619952312, now seen corresponding path program 13 times [2022-12-13 21:16:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:16:42,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551697150] [2022-12-13 21:16:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:16:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:16:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:16:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:16:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:16:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551697150] [2022-12-13 21:16:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551697150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:16:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915479199] [2022-12-13 21:16:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 21:16:43,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:16:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:16:43,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:16:43,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 21:16:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:16:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 21:16:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:16:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:16:46,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:16:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:16:50,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915479199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:16:50,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:16:50,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 33 [2022-12-13 21:16:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898452468] [2022-12-13 21:16:50,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:16:50,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 21:16:50,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:16:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 21:16:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 21:16:52,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:16:56,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:16:58,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 160 [2022-12-13 21:16:58,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 3571 transitions, 117861 flow. Second operand has 35 states, 35 states have (on average 59.68571428571428) internal successors, (2089), 35 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:16:58,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:16:58,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 160 [2022-12-13 21:16:58,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:03,447 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:17:13,260 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:17:15,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:17:21,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:17:42,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:17:58,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:18:00,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:18:06,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:18:08,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:18:10,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:18:26,654 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 153 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:19:02,579 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 147 DAG size of output: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:19:21,474 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 136 DAG size of output: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:19:58,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 21:21:01,300 INFO L130 PetriNetUnfolder]: 9817/16788 cut-off events. [2022-12-13 21:21:01,300 INFO L131 PetriNetUnfolder]: For 577338/577338 co-relation queries the response was YES. [2022-12-13 21:21:01,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216689 conditions, 16788 events. 9817/16788 cut-off events. For 577338/577338 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 131439 event pairs, 29 based on Foata normal form. 12/16800 useless extension candidates. Maximal degree in co-relation 216271. Up to 4898 conditions per place. [2022-12-13 21:21:01,676 INFO L137 encePairwiseOnDemand]: 149/160 looper letters, 319 selfloop transitions, 4603 changer transitions 113/5035 dead transitions. [2022-12-13 21:21:01,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 5035 transitions, 167008 flow [2022-12-13 21:21:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-12-13 21:21:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-12-13 21:21:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 9260 transitions. [2022-12-13 21:21:01,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3884228187919463 [2022-12-13 21:21:01,684 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 9260 transitions. [2022-12-13 21:21:01,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 9260 transitions. [2022-12-13 21:21:01,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:01,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 9260 transitions. [2022-12-13 21:21:01,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 62.147651006711406) internal successors, (9260), 149 states have internal predecessors, (9260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:01,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 160.0) internal successors, (24000), 150 states have internal predecessors, (24000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:01,708 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 160.0) internal successors, (24000), 150 states have internal predecessors, (24000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:01,709 INFO L175 Difference]: Start difference. First operand has 705 places, 3571 transitions, 117861 flow. Second operand 149 states and 9260 transitions. [2022-12-13 21:21:01,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 5035 transitions, 167008 flow [2022-12-13 21:21:19,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 5035 transitions, 165188 flow, removed 862 selfloop flow, removed 28 redundant places. [2022-12-13 21:21:19,726 INFO L231 Difference]: Finished difference. Result has 831 places, 4709 transitions, 165196 flow [2022-12-13 21:21:19,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=116511, PETRI_DIFFERENCE_MINUEND_PLACES=657, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=165196, PETRI_PLACES=831, PETRI_TRANSITIONS=4709} [2022-12-13 21:21:19,728 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 809 predicate places. [2022-12-13 21:21:19,728 INFO L495 AbstractCegarLoop]: Abstraction has has 831 places, 4709 transitions, 165196 flow [2022-12-13 21:21:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 59.68571428571428) internal successors, (2089), 35 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:19,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:19,729 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:19,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 21:21:19,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:19,931 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 21:21:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -524085182, now seen corresponding path program 14 times [2022-12-13 21:21:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:19,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122142817] [2022-12-13 21:21:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:20,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:20,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122142817] [2022-12-13 21:21:20,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122142817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:20,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421835284] [2022-12-13 21:21:20,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:21:20,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:20,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:20,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:20,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 21:21:20,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:21:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 21:21:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:21,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:23,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421835284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:21:23,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:21:23,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 21:21:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887745622] [2022-12-13 21:21:23,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:21:23,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 21:21:23,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 21:21:23,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-12-13 21:21:25,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 160 [2022-12-13 21:21:25,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 831 places, 4709 transitions, 165196 flow. Second operand has 28 states, 28 states have (on average 62.107142857142854) internal successors, (1739), 28 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:25,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:25,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 160 [2022-12-13 21:21:25,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:32,882 INFO L130 PetriNetUnfolder]: 12027/20912 cut-off events. [2022-12-13 21:22:32,882 INFO L131 PetriNetUnfolder]: For 766791/766791 co-relation queries the response was YES. [2022-12-13 21:22:33,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286474 conditions, 20912 events. 12027/20912 cut-off events. For 766791/766791 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 173229 event pairs, 105 based on Foata normal form. 44/20956 useless extension candidates. Maximal degree in co-relation 285845. Up to 5814 conditions per place. [2022-12-13 21:22:33,305 INFO L137 encePairwiseOnDemand]: 149/160 looper letters, 1500 selfloop transitions, 4522 changer transitions 247/6269 dead transitions. [2022-12-13 21:22:33,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 6269 transitions, 226270 flow [2022-12-13 21:22:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 21:22:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-12-13 21:22:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 6260 transitions. [2022-12-13 21:22:33,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40335051546391754 [2022-12-13 21:22:33,311 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 6260 transitions. [2022-12-13 21:22:33,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 6260 transitions. [2022-12-13 21:22:33,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:33,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 6260 transitions. [2022-12-13 21:22:33,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 64.5360824742268) internal successors, (6260), 97 states have internal predecessors, (6260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:22:33,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 160.0) internal successors, (15680), 98 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:22:33,326 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 160.0) internal successors, (15680), 98 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:22:33,326 INFO L175 Difference]: Start difference. First operand has 831 places, 4709 transitions, 165196 flow. Second operand 97 states and 6260 transitions. [2022-12-13 21:22:33,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 6269 transitions, 226270 flow [2022-12-13 21:23:04,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 6269 transitions, 215383 flow, removed 2321 selfloop flow, removed 37 redundant places. [2022-12-13 21:23:05,018 INFO L231 Difference]: Finished difference. Result has 938 places, 5821 transitions, 211317 flow [2022-12-13 21:23:05,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=157003, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=211317, PETRI_PLACES=938, PETRI_TRANSITIONS=5821} [2022-12-13 21:23:05,021 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 916 predicate places. [2022-12-13 21:23:05,021 INFO L495 AbstractCegarLoop]: Abstraction has has 938 places, 5821 transitions, 211317 flow [2022-12-13 21:23:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 62.107142857142854) internal successors, (1739), 28 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:05,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:05,021 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:05,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 21:23:05,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 21:23:05,222 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 21:23:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -84489376, now seen corresponding path program 15 times [2022-12-13 21:23:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:05,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942969490] [2022-12-13 21:23:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942969490] [2022-12-13 21:23:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942969490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680791695] [2022-12-13 21:23:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:23:06,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:06,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:06,413 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:06,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a10a811-86df-45de-b4ff-ea5431afef1d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 21:23:06,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 21:23:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:23:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:23:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:07,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:09,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680791695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:09,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:09,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-12-13 21:23:09,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306638332] [2022-12-13 21:23:09,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:09,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 21:23:09,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:09,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 21:23:09,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-12-13 21:23:10,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 160 [2022-12-13 21:23:10,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 5821 transitions, 211317 flow. Second operand has 29 states, 29 states have (on average 62.03448275862069) internal successors, (1799), 29 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:10,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:10,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 160 [2022-12-13 21:23:10,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand