./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --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_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/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_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/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_eccc8a32-e190-4607-b046-7de76c9bea3d/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 e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- 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 17:14:42,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:14:42,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:14:42,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:14:42,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:14:42,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:14:42,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:14:42,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:14:42,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:14:42,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:14:42,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:14:42,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:14:42,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:14:42,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:14:42,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:14:42,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:14:42,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:14:42,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:14:42,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:14:42,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:14:42,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:14:42,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:14:42,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:14:42,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:14:42,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:14:42,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:14:42,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:14:42,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:14:42,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:14:42,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:14:42,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:14:42,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:14:42,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:14:42,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:14:42,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:14:42,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:14:42,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:14:42,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:14:42,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:14:42,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:14:42,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:14:42,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:14:42,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:14:42,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:14:42,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:14:42,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:14:42,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:14:42,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:14:42,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:14:42,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:14:42,746 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:14:42,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:14:42,747 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:14:42,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:14:42,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:14:42,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:14:42,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:14:42,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:14:42,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:14:42,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:14:42,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:14:42,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:14:42,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:14:42,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:14:42,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:14:42,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:14:42,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:14:42,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:14:42,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:14:42,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:14:42,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:14:42,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:14:42,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:14:42,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:14:42,750 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:14:42,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:14:42,751 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:14:42,751 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_eccc8a32-e190-4607-b046-7de76c9bea3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2022-12-13 17:14:42,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:14:42,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:14:42,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:14:42,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:14:42,935 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:14:42,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_safe-12.i [2022-12-13 17:14:45,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:14:45,799 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:14:45,799 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/sv-benchmarks/c/pthread/fib_safe-12.i [2022-12-13 17:14:45,808 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/data/1788b3672/813dab8e5a9d497eace3858da16b08c7/FLAG03a739a23 [2022-12-13 17:14:45,819 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/data/1788b3672/813dab8e5a9d497eace3858da16b08c7 [2022-12-13 17:14:45,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:14:45,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:14:45,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:14:45,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:14:45,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:14:45,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:14:45" (1/1) ... [2022-12-13 17:14:45,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73862a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:45, skipping insertion in model container [2022-12-13 17:14:45,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:14:45" (1/1) ... [2022-12-13 17:14:45,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:14:45,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:14:46,046 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_eccc8a32-e190-4607-b046-7de76c9bea3d/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-12-13 17:14:46,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,062 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,063 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:14:46,070 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:14:46,094 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_eccc8a32-e190-4607-b046-7de76c9bea3d/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-12-13 17:14:46,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:14:46,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:14:46,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:14:46,121 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:14:46,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46 WrapperNode [2022-12-13 17:14:46,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:14:46,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:14:46,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:14:46,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:14:46,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,151 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 17:14:46,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:14:46,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:14:46,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:14:46,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:14:46,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:14:46,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:14:46,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:14:46,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:14:46,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (1/1) ... [2022-12-13 17:14:46,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:14:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:46,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:14:46,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:14:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 17:14:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 17:14:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 17:14:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 17:14:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:14:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:14:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:14:46,231 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 17:14:46,329 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:14:46,330 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:14:46,477 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:14:46,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:14:46,484 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 17:14:46,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:14:46 BoogieIcfgContainer [2022-12-13 17:14:46,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:14:46,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:14:46,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:14:46,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:14:46,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:14:45" (1/3) ... [2022-12-13 17:14:46,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14074405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:14:46, skipping insertion in model container [2022-12-13 17:14:46,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:46" (2/3) ... [2022-12-13 17:14:46,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14074405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:14:46, skipping insertion in model container [2022-12-13 17:14:46,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:14:46" (3/3) ... [2022-12-13 17:14:46,495 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2022-12-13 17:14:46,502 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:14:46,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:14:46,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:14:46,510 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:14:46,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:14:46,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 17:14:46,633 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 17:14:46,634 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:14:46,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-13 17:14:46,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 17:14:46,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-12-13 17:14:46,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:14:46,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 17:14:46,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 17:14:46,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-12-13 17:14:46,680 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 17:14:46,681 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:14:46,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-13 17:14:46,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-12-13 17:14:48,813 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2022-12-13 17:14:48,814 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-12-13 17:14:48,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:14:48,829 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;@41c7840a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:14:48,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 17:14:48,832 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-13 17:14:48,832 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:14:48,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:48,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:14:48,833 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 17:14:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1641818498, now seen corresponding path program 1 times [2022-12-13 17:14:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:48,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55140545] [2022-12-13 17:14:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:48,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:49,024 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 17:14:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55140545] [2022-12-13 17:14:49,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55140545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:49,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:14:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440508711] [2022-12-13 17:14:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:49,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:49,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:49,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 198 [2022-12-13 17:14:49,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:49,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 198 [2022-12-13 17:14:49,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:49,114 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 17:14:49,114 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:14:49,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-12-13 17:14:49,116 INFO L137 encePairwiseOnDemand]: 194/198 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-13 17:14:49,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-13 17:14:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:14:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-12-13 17:14:49,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326599326599324 [2022-12-13 17:14:49,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-12-13 17:14:49,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-12-13 17:14:49,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:49,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-12-13 17:14:49,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,136 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-12-13 17:14:49,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-13 17:14:49,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:14:49,139 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-13 17:14:49,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-13 17:14:49,143 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-13 17:14:49,143 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-13 17:14:49,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:49,144 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:49,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:14:49,144 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 17:14:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 643234342, now seen corresponding path program 1 times [2022-12-13 17:14:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:49,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030483840] [2022-12-13 17:14:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:49,210 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 17:14:49,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030483840] [2022-12-13 17:14:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030483840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129978361] [2022-12-13 17:14:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:49,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:49,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:49,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:14:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:14:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:49,313 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 17:14:49,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:49,330 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 17:14:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129978361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:49,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:14:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453178502] [2022-12-13 17:14:49,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:14:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:14:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:14:49,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 17:14:49,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:49,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 17:14:49,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:49,433 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 17:14:49,433 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:14:49,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 452 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-12-13 17:14:49,435 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 17:14:49,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-13 17:14:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:14:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:14:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-12-13 17:14:49,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48653198653198654 [2022-12-13 17:14:49,439 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-12-13 17:14:49,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-12-13 17:14:49,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:49,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-12-13 17:14:49,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,447 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,447 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-12-13 17:14:49,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-13 17:14:49,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:14:49,448 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-13 17:14:49,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-12-13 17:14:49,449 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-13 17:14:49,449 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-13 17:14:49,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:49,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:49,450 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:49,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:14:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:49,652 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 17:14:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1549565826, now seen corresponding path program 2 times [2022-12-13 17:14:49,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:49,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210087696] [2022-12-13 17:14:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:49,857 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 17:14:49,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210087696] [2022-12-13 17:14:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210087696] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841430012] [2022-12-13 17:14:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:14:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:49,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:14:49,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:14:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:14:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:14:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:49,938 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 17:14:49,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:49,979 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 17:14:49,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841430012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:49,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:49,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 17:14:49,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242451817] [2022-12-13 17:14:49,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:49,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:14:49,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:49,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:14:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:14:50,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 17:14:50,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:50,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:50,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 17:14:50,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:50,146 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 17:14:50,146 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-13 17:14:50,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 846 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-12-13 17:14:50,152 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 17:14:50,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-13 17:14:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:14:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:14:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-12-13 17:14:50,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48695286195286197 [2022-12-13 17:14:50,156 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-12-13 17:14:50,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-12-13 17:14:50,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:50,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-12-13 17:14:50,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:50,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:50,163 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:50,163 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-12-13 17:14:50,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-13 17:14:50,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:14:50,165 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-13 17:14:50,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-12-13 17:14:50,166 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-13 17:14:50,166 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-13 17:14:50,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:50,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:50,167 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:50,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:14:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:50,367 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 17:14:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -698507394, now seen corresponding path program 3 times [2022-12-13 17:14:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390443838] [2022-12-13 17:14:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:50,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390443838] [2022-12-13 17:14:50,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390443838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126509601] [2022-12-13 17:14:50,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:14:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:50,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:50,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:14:50,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 17:14:50,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:14:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:14:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:50,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:50,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126509601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:50,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:50,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 17:14:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885879746] [2022-12-13 17:14:50,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:50,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:14:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:14:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:14:50,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 17:14:50,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:50,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:50,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 17:14:50,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:51,036 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-13 17:14:51,036 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-12-13 17:14:51,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1646 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-12-13 17:14:51,040 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-13 17:14:51,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-12-13 17:14:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 17:14:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 17:14:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-12-13 17:14:51,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4871632996632997 [2022-12-13 17:14:51,046 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-12-13 17:14:51,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-12-13 17:14:51,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:51,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-12-13 17:14:51,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.45833333333333) internal successors, (2315), 24 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:51,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 198.0) internal successors, (4950), 25 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:51,061 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 198.0) internal successors, (4950), 25 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:51,061 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-12-13 17:14:51,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-12-13 17:14:51,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-13 17:14:51,070 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-12-13 17:14:51,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-12-13 17:14:51,071 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-12-13 17:14:51,071 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-12-13 17:14:51,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:51,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:51,073 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:51,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:14:51,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 17:14:51,274 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 17:14:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1078467966, now seen corresponding path program 4 times [2022-12-13 17:14:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319347460] [2022-12-13 17:14:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319347460] [2022-12-13 17:14:51,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319347460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324533215] [2022-12-13 17:14:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:14:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:51,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:51,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:14:51,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:14:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:14:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:14:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:51,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:51,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324533215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:51,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:51,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2022-12-13 17:14:51,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428023029] [2022-12-13 17:14:51,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:51,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:14:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:14:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:14:52,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 17:14:52,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 29 states, 29 states have (on average 90.20689655172414) internal successors, (2616), 29 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:52,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:52,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 17:14:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:52,242 INFO L130 PetriNetUnfolder]: 529/797 cut-off events. [2022-12-13 17:14:52,242 INFO L131 PetriNetUnfolder]: For 9342/9342 co-relation queries the response was YES. [2022-12-13 17:14:52,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 797 events. 529/797 cut-off events. For 9342/9342 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1914 event pairs, 20 based on Foata normal form. 36/657 useless extension candidates. Maximal degree in co-relation 2550. Up to 178 conditions per place. [2022-12-13 17:14:52,249 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 168 selfloop transitions, 27 changer transitions 0/195 dead transitions. [2022-12-13 17:14:52,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 195 transitions, 1000 flow [2022-12-13 17:14:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 17:14:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 17:14:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2691 transitions. [2022-12-13 17:14:52,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48538961038961037 [2022-12-13 17:14:52,257 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2691 transitions. [2022-12-13 17:14:52,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2691 transitions. [2022-12-13 17:14:52,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:52,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2691 transitions. [2022-12-13 17:14:52,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.10714285714286) internal successors, (2691), 28 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:52,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 198.0) internal successors, (5742), 29 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:52,280 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 198.0) internal successors, (5742), 29 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:52,280 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 28 states and 2691 transitions. [2022-12-13 17:14:52,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 195 transitions, 1000 flow [2022-12-13 17:14:52,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 195 transitions, 896 flow, removed 41 selfloop flow, removed 11 redundant places. [2022-12-13 17:14:52,294 INFO L231 Difference]: Finished difference. Result has 91 places, 39 transitions, 266 flow [2022-12-13 17:14:52,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=266, PETRI_PLACES=91, PETRI_TRANSITIONS=39} [2022-12-13 17:14:52,295 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 73 predicate places. [2022-12-13 17:14:52,295 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 39 transitions, 266 flow [2022-12-13 17:14:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.20689655172414) internal successors, (2616), 29 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:52,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:52,297 INFO L209 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:52,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:14:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:52,497 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 17:14:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2085373822, now seen corresponding path program 5 times [2022-12-13 17:14:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:52,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610546731] [2022-12-13 17:14:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:53,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610546731] [2022-12-13 17:14:53,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610546731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010817314] [2022-12-13 17:14:53,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:14:53,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:53,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:53,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:14:54,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 17:14:54,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:14:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:14:54,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:55,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010817314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:56,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:56,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-13 17:14:56,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743139654] [2022-12-13 17:14:56,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:56,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 17:14:56,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 17:14:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=5584, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 17:14:58,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 17:14:58,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 39 transitions, 266 flow. Second operand has 83 states, 83 states have (on average 85.1566265060241) internal successors, (7068), 83 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:58,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:58,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 17:14:58,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:16:17,259 INFO L130 PetriNetUnfolder]: 110579/165890 cut-off events. [2022-12-13 17:16:17,259 INFO L131 PetriNetUnfolder]: For 1033117/1033117 co-relation queries the response was YES. [2022-12-13 17:16:17,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533496 conditions, 165890 events. 110579/165890 cut-off events. For 1033117/1033117 co-relation queries the response was YES. Maximal size of possible extension queue 2952. Compared 1267269 event pairs, 109 based on Foata normal form. 225/124669 useless extension candidates. Maximal degree in co-relation 533458. Up to 34573 conditions per place. [2022-12-13 17:16:18,494 INFO L137 encePairwiseOnDemand]: 193/198 looper letters, 2034 selfloop transitions, 7337 changer transitions 0/9371 dead transitions. [2022-12-13 17:16:18,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 9371 transitions, 87543 flow [2022-12-13 17:16:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 407 states. [2022-12-13 17:16:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2022-12-13 17:16:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 37441 transitions. [2022-12-13 17:16:18,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46460923733651005 [2022-12-13 17:16:18,530 INFO L72 ComplementDD]: Start complementDD. Operand 407 states and 37441 transitions. [2022-12-13 17:16:18,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 37441 transitions. [2022-12-13 17:16:18,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:16:18,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 407 states and 37441 transitions. [2022-12-13 17:16:18,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 408 states, 407 states have (on average 91.992628992629) internal successors, (37441), 407 states have internal predecessors, (37441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:18,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 408 states, 408 states have (on average 198.0) internal successors, (80784), 408 states have internal predecessors, (80784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:18,646 INFO L81 ComplementDD]: Finished complementDD. Result has 408 states, 408 states have (on average 198.0) internal successors, (80784), 408 states have internal predecessors, (80784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:18,647 INFO L175 Difference]: Start difference. First operand has 91 places, 39 transitions, 266 flow. Second operand 407 states and 37441 transitions. [2022-12-13 17:16:18,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 9371 transitions, 87543 flow [2022-12-13 17:16:30,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 9371 transitions, 68645 flow, removed 4711 selfloop flow, removed 23 redundant places. [2022-12-13 17:16:30,372 INFO L231 Difference]: Finished difference. Result has 504 places, 7376 transitions, 44426 flow [2022-12-13 17:16:30,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=407, PETRI_FLOW=44426, PETRI_PLACES=504, PETRI_TRANSITIONS=7376} [2022-12-13 17:16:30,373 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 486 predicate places. [2022-12-13 17:16:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 7376 transitions, 44426 flow [2022-12-13 17:16:30,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 85.1566265060241) internal successors, (7068), 83 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:30,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:16:30,375 INFO L209 CegarLoopForPetriNet]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:16:30,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:16:30,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:16:30,576 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 17:16:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:16:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash -35155118, now seen corresponding path program 1 times [2022-12-13 17:16:30,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:16:30,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958279638] [2022-12-13 17:16:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:16:30,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:16:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:16:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:16:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:16:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958279638] [2022-12-13 17:16:31,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958279638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:16:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735534559] [2022-12-13 17:16:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:16:31,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:16:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:16:31,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:16:31,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eccc8a32-e190-4607-b046-7de76c9bea3d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:16:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:16:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-13 17:16:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:16:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 254 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:16:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:16:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:16:34,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735534559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:16:34,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:16:34,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-12-13 17:16:34,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919762253] [2022-12-13 17:16:34,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:16:34,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-12-13 17:16:34,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:16:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-12-13 17:16:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 17:16:36,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 17:16:36,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 7376 transitions, 44426 flow. Second operand has 89 states, 89 states have (on average 85.17977528089888) internal successors, (7581), 89 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:36,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:16:36,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 17:16:36,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand