./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-2.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_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/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_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/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_4645f128-48bc-4310-bcaf-ee3470c88c7c/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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- 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 11:44:58,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:44:58,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:44:58,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:44:58,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:44:58,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:44:58,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:44:58,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:44:58,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:44:58,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:44:58,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:44:58,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:44:58,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:44:58,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:44:58,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:44:58,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:44:58,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:44:58,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:44:58,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:44:58,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:44:58,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:44:58,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:44:58,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:44:58,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:44:58,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:44:58,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:44:58,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:44:58,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:44:58,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:44:58,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:44:58,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:44:58,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:44:58,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:44:58,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:44:58,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:44:58,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:44:58,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:44:58,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:44:58,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:44:58,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:44:58,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:44:58,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:44:58,991 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:44:58,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:44:58,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:44:58,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:44:58,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:44:58,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:44:58,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:44:58,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:44:58,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:44:58,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:44:58,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:44:58,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:44:58,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:44:58,995 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:44:58,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:44:58,996 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:44:58,996 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_4645f128-48bc-4310-bcaf-ee3470c88c7c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2022-12-13 11:44:59,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:44:59,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:44:59,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:44:59,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:44:59,192 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:44:59,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/triangular-longest-2.i [2022-12-13 11:45:01,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:45:02,013 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:45:02,014 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/sv-benchmarks/c/pthread/triangular-longest-2.i [2022-12-13 11:45:02,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/data/a5b23a6be/a3dd84057d304e12ab96952d58b29342/FLAG0ea241b75 [2022-12-13 11:45:02,033 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/data/a5b23a6be/a3dd84057d304e12ab96952d58b29342 [2022-12-13 11:45:02,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:45:02,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:45:02,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:45:02,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:45:02,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:45:02,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124039e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02, skipping insertion in model container [2022-12-13 11:45:02,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:45:02,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:45:02,275 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,276 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,279 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,283 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,283 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,285 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_4645f128-48bc-4310-bcaf-ee3470c88c7c/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2022-12-13 11:45:02,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:45:02,296 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:45:02,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:02,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:02,324 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_4645f128-48bc-4310-bcaf-ee3470c88c7c/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2022-12-13 11:45:02,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:45:02,346 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:45:02,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02 WrapperNode [2022-12-13 11:45:02,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:45:02,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:45:02,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:45:02,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:45:02,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,376 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-12-13 11:45:02,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:45:02,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:45:02,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:45:02,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:45:02,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:45:02,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:45:02,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:45:02,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:45:02,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (1/1) ... [2022-12-13 11:45:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:45:02,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:02,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:45:02,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 11:45:02,457 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 11:45:02,457 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:45:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:45:02,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:45:02,458 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 11:45:02,554 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:45:02,555 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:45:02,681 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:45:02,688 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:45:02,688 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 11:45:02,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:45:02 BoogieIcfgContainer [2022-12-13 11:45:02,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:45:02,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:45:02,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:45:02,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:45:02,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:45:02" (1/3) ... [2022-12-13 11:45:02,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a133a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:45:02, skipping insertion in model container [2022-12-13 11:45:02,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:02" (2/3) ... [2022-12-13 11:45:02,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a133a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:45:02, skipping insertion in model container [2022-12-13 11:45:02,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:45:02" (3/3) ... [2022-12-13 11:45:02,699 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2022-12-13 11:45:02,708 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:45:02,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:45:02,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:45:02,718 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:45:02,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:45:02,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-12-13 11:45:02,813 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-12-13 11:45:02,813 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:45:02,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-13 11:45:02,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-12-13 11:45:02,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-12-13 11:45:02,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:45:02,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 68 transitions, 142 flow [2022-12-13 11:45:02,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 68 transitions, 142 flow [2022-12-13 11:45:02,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 142 flow [2022-12-13 11:45:02,847 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-12-13 11:45:02,847 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:45:02,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-13 11:45:02,848 INFO L119 LiptonReduction]: Number of co-enabled transitions 1122 [2022-12-13 11:45:04,385 INFO L134 LiptonReduction]: Checked pairs total: 1071 [2022-12-13 11:45:04,385 INFO L136 LiptonReduction]: Total number of compositions: 62 [2022-12-13 11:45:04,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:45:04,401 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;@1de9adce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:45:04,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 11:45:04,404 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2022-12-13 11:45:04,405 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:45:04,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:04,405 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:45:04,406 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 11:45:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash -453767177, now seen corresponding path program 1 times [2022-12-13 11:45:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144967935] [2022-12-13 11:45:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:04,731 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 11:45:04,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144967935] [2022-12-13 11:45:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144967935] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:04,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:04,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:45:04,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605445968] [2022-12-13 11:45:04,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:04,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:45:04,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:45:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:45:04,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 132 [2022-12-13 11:45:04,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:04,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:04,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 132 [2022-12-13 11:45:04,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:04,867 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2022-12-13 11:45:04,867 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:45:04,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 381 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2022-12-13 11:45:04,869 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2022-12-13 11:45:04,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2022-12-13 11:45:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:45:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:45:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 261 transitions. [2022-12-13 11:45:04,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2022-12-13 11:45:04,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 261 transitions. [2022-12-13 11:45:04,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 261 transitions. [2022-12-13 11:45:04,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:04,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 261 transitions. [2022-12-13 11:45:04,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:04,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:04,888 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:04,889 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 261 transitions. [2022-12-13 11:45:04,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2022-12-13 11:45:04,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:45:04,892 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2022-12-13 11:45:04,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2022-12-13 11:45:04,896 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2022-12-13 11:45:04,896 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2022-12-13 11:45:04,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:04,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:04,897 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:45:04,897 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 11:45:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:04,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2016076337, now seen corresponding path program 1 times [2022-12-13 11:45:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:04,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574553750] [2022-12-13 11:45:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:04,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:04,985 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 11:45:04,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574553750] [2022-12-13 11:45:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574553750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:04,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:04,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:45:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146242877] [2022-12-13 11:45:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:04,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:45:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:45:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:45:05,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:05,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 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 11:45:05,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:05,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:05,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:05,074 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2022-12-13 11:45:05,074 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-13 11:45:05,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 660 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2022-12-13 11:45:05,075 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2022-12-13 11:45:05,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2022-12-13 11:45:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:45:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:45:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 380 transitions. [2022-12-13 11:45:05,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2022-12-13 11:45:05,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 380 transitions. [2022-12-13 11:45:05,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 380 transitions. [2022-12-13 11:45:05,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:05,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 380 transitions. [2022-12-13 11:45:05,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.333333333333336) internal successors, (380), 6 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,080 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,081 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 380 transitions. [2022-12-13 11:45:05,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2022-12-13 11:45:05,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:45:05,082 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2022-12-13 11:45:05,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2022-12-13 11:45:05,082 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2022-12-13 11:45:05,082 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2022-12-13 11:45:05,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 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 11:45:05,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:05,083 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:05,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:45:05,083 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 11:45:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2016092147, now seen corresponding path program 2 times [2022-12-13 11:45:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:05,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595968204] [2022-12-13 11:45:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:05,157 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 11:45:05,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:05,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595968204] [2022-12-13 11:45:05,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595968204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:05,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:05,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:45:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396438456] [2022-12-13 11:45:05,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:05,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:45:05,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:05,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:45:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:45:05,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:05,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 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 11:45:05,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:05,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:05,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:05,271 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2022-12-13 11:45:05,271 INFO L131 PetriNetUnfolder]: For 291/291 co-relation queries the response was YES. [2022-12-13 11:45:05,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2022-12-13 11:45:05,273 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2022-12-13 11:45:05,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2022-12-13 11:45:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:45:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:45:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-12-13 11:45:05,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2022-12-13 11:45:05,276 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-12-13 11:45:05,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-12-13 11:45:05,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:05,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-12-13 11:45:05,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,281 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,281 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 441 transitions. [2022-12-13 11:45:05,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2022-12-13 11:45:05,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 11:45:05,285 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2022-12-13 11:45:05,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-12-13 11:45:05,286 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2022-12-13 11:45:05,286 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2022-12-13 11:45:05,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 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 11:45:05,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:05,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:05,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:45:05,287 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 11:45:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash -224372252, now seen corresponding path program 1 times [2022-12-13 11:45:05,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:05,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090768871] [2022-12-13 11:45:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:05,387 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 11:45:05,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090768871] [2022-12-13 11:45:05,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090768871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:05,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:05,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:45:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85119344] [2022-12-13 11:45:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:05,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:45:05,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:45:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:45:05,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:05,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:05,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:05,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:05,498 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2022-12-13 11:45:05,499 INFO L131 PetriNetUnfolder]: For 821/821 co-relation queries the response was YES. [2022-12-13 11:45:05,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 944 event pairs, 16 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2022-12-13 11:45:05,501 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2022-12-13 11:45:05,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2022-12-13 11:45:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:45:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:45:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 502 transitions. [2022-12-13 11:45:05,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2022-12-13 11:45:05,502 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 502 transitions. [2022-12-13 11:45:05,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 502 transitions. [2022-12-13 11:45:05,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:05,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 502 transitions. [2022-12-13 11:45:05,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.75) internal successors, (502), 8 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 132.0) internal successors, (1188), 9 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,505 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 132.0) internal successors, (1188), 9 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,505 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 502 transitions. [2022-12-13 11:45:05,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2022-12-13 11:45:05,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 11:45:05,509 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2022-12-13 11:45:05,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2022-12-13 11:45:05,509 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2022-12-13 11:45:05,509 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2022-12-13 11:45:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:05,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:45:05,510 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 11:45:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:05,510 INFO L85 PathProgramCache]: Analyzing trace with hash -196650812, now seen corresponding path program 2 times [2022-12-13 11:45:05,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:05,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865384857] [2022-12-13 11:45:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:05,582 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 11:45:05,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:05,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865384857] [2022-12-13 11:45:05,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865384857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:05,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:05,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:45:05,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631036815] [2022-12-13 11:45:05,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:05,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:45:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:45:05,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:45:05,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:05,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:05,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:05,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:05,722 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2022-12-13 11:45:05,722 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2022-12-13 11:45:05,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 931 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2022-12-13 11:45:05,723 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2022-12-13 11:45:05,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2022-12-13 11:45:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:45:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:45:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2022-12-13 11:45:05,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4751082251082251 [2022-12-13 11:45:05,724 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2022-12-13 11:45:05,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2022-12-13 11:45:05,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:05,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2022-12-13 11:45:05,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,727 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,727 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 439 transitions. [2022-12-13 11:45:05,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2022-12-13 11:45:05,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-13 11:45:05,731 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2022-12-13 11:45:05,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2022-12-13 11:45:05,731 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2022-12-13 11:45:05,732 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2022-12-13 11:45:05,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:05,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:05,732 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:05,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:45:05,732 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 11:45:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1801188768, now seen corresponding path program 3 times [2022-12-13 11:45:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:05,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250590347] [2022-12-13 11:45:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:05,810 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 11:45:05,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:05,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250590347] [2022-12-13 11:45:05,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250590347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656592751] [2022-12-13 11:45:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:45:05,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:05,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:05,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:05,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:45:05,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:45:05,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:45:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:05,963 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 11:45:05,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:06,058 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 11:45:06,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656592751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:06,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:06,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 11:45:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571420535] [2022-12-13 11:45:06,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:45:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:45:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:45:06,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:06,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 58.916666666666664) internal successors, (707), 12 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:06,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:06,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:06,343 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2022-12-13 11:45:06,343 INFO L131 PetriNetUnfolder]: For 2205/2205 co-relation queries the response was YES. [2022-12-13 11:45:06,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1195 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2022-12-13 11:45:06,347 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2022-12-13 11:45:06,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2022-12-13 11:45:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:45:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:45:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 872 transitions. [2022-12-13 11:45:06,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2022-12-13 11:45:06,349 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 872 transitions. [2022-12-13 11:45:06,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 872 transitions. [2022-12-13 11:45:06,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:06,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 872 transitions. [2022-12-13 11:45:06,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 62.285714285714285) internal successors, (872), 14 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 132.0) internal successors, (1980), 15 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,353 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 132.0) internal successors, (1980), 15 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,353 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 872 transitions. [2022-12-13 11:45:06,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2022-12-13 11:45:06,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-12-13 11:45:06,363 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2022-12-13 11:45:06,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2022-12-13 11:45:06,364 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2022-12-13 11:45:06,364 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2022-12-13 11:45:06,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.916666666666664) internal successors, (707), 12 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:06,364 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:06,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:45:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:45:06,565 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 11:45:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:06,565 INFO L85 PathProgramCache]: Analyzing trace with hash 15514281, now seen corresponding path program 4 times [2022-12-13 11:45:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:06,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562355815] [2022-12-13 11:45:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:06,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:06,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562355815] [2022-12-13 11:45:06,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562355815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040786522] [2022-12-13 11:45:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:45:06,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:06,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:06,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:06,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:45:06,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:45:06,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:45:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:06,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:06,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040786522] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:06,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:06,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 11:45:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100818566] [2022-12-13 11:45:06,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:45:06,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:45:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:45:06,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:06,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 58.8125) internal successors, (941), 16 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:06,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:06,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:06,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:07,209 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2022-12-13 11:45:07,209 INFO L131 PetriNetUnfolder]: For 4313/4313 co-relation queries the response was YES. [2022-12-13 11:45:07,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1637 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2022-12-13 11:45:07,212 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2022-12-13 11:45:07,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2022-12-13 11:45:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:45:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 11:45:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 995 transitions. [2022-12-13 11:45:07,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47111742424242425 [2022-12-13 11:45:07,215 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 995 transitions. [2022-12-13 11:45:07,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 995 transitions. [2022-12-13 11:45:07,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:07,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 995 transitions. [2022-12-13 11:45:07,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 62.1875) internal successors, (995), 16 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:07,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:07,222 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:07,222 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 995 transitions. [2022-12-13 11:45:07,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2022-12-13 11:45:07,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2022-12-13 11:45:07,235 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2022-12-13 11:45:07,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2022-12-13 11:45:07,235 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2022-12-13 11:45:07,236 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2022-12-13 11:45:07,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 58.8125) internal successors, (941), 16 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:07,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:07,236 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:07,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:45:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:07,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1670825511, now seen corresponding path program 5 times [2022-12-13 11:45:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956575129] [2022-12-13 11:45:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:07,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:07,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956575129] [2022-12-13 11:45:07,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956575129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455451158] [2022-12-13 11:45:07,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:45:07,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:07,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:07,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:07,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:45:07,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:45:07,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:07,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:45:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:07,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:07,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455451158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:07,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:07,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 11:45:07,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488687711] [2022-12-13 11:45:07,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:07,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:45:07,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:45:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:45:07,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:07,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 17 states have (on average 58.8235294117647) internal successors, (1000), 17 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:07,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:07,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:07,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:08,246 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2022-12-13 11:45:08,246 INFO L131 PetriNetUnfolder]: For 12130/12130 co-relation queries the response was YES. [2022-12-13 11:45:08,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12130/12130 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3337 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2022-12-13 11:45:08,252 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2022-12-13 11:45:08,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2022-12-13 11:45:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:45:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 11:45:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1368 transitions. [2022-12-13 11:45:08,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2022-12-13 11:45:08,256 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1368 transitions. [2022-12-13 11:45:08,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1368 transitions. [2022-12-13 11:45:08,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:08,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1368 transitions. [2022-12-13 11:45:08,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.18181818181818) internal successors, (1368), 22 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:08,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 132.0) internal successors, (3036), 23 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:08,265 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 132.0) internal successors, (3036), 23 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:08,265 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1368 transitions. [2022-12-13 11:45:08,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2022-12-13 11:45:08,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2022-12-13 11:45:08,311 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2022-12-13 11:45:08,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2022-12-13 11:45:08,311 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2022-12-13 11:45:08,312 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2022-12-13 11:45:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.8235294117647) internal successors, (1000), 17 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:08,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:08,312 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:08,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:45:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:08,514 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2139754649, now seen corresponding path program 6 times [2022-12-13 11:45:08,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:08,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238218441] [2022-12-13 11:45:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:08,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238218441] [2022-12-13 11:45:08,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238218441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154807698] [2022-12-13 11:45:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:45:08,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:08,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:08,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:08,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:45:08,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 11:45:08,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:45:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:08,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:08,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154807698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:08,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:08,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 11:45:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41833820] [2022-12-13 11:45:08,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:45:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:45:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:45:08,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:08,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 58.8125) internal successors, (941), 16 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:08,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:08,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:08,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:09,374 INFO L130 PetriNetUnfolder]: 612/1111 cut-off events. [2022-12-13 11:45:09,374 INFO L131 PetriNetUnfolder]: For 36024/36024 co-relation queries the response was YES. [2022-12-13 11:45:09,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 36024/36024 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5395 event pairs, 25 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2022-12-13 11:45:09,380 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2022-12-13 11:45:09,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2022-12-13 11:45:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 11:45:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 11:45:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1679 transitions. [2022-12-13 11:45:09,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4710998877665544 [2022-12-13 11:45:09,384 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1679 transitions. [2022-12-13 11:45:09,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1679 transitions. [2022-12-13 11:45:09,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:09,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1679 transitions. [2022-12-13 11:45:09,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.18518518518518) internal successors, (1679), 27 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 132.0) internal successors, (3696), 28 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,392 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 132.0) internal successors, (3696), 28 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,392 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1679 transitions. [2022-12-13 11:45:09,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2022-12-13 11:45:09,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2022-12-13 11:45:09,465 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2022-12-13 11:45:09,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2022-12-13 11:45:09,466 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2022-12-13 11:45:09,466 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2022-12-13 11:45:09,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 58.8125) internal successors, (941), 16 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:09,466 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:09,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:45:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:09,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:09,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1308408293, now seen corresponding path program 7 times [2022-12-13 11:45:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:09,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542056341] [2022-12-13 11:45:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:09,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:09,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542056341] [2022-12-13 11:45:09,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542056341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:09,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787007907] [2022-12-13 11:45:09,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:45:09,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:09,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:09,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:45:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:45:09,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:09,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:45:10,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787007907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:10,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:10,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-13 11:45:10,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154826572] [2022-12-13 11:45:10,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:10,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:45:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:45:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:45:10,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:10,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:10,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:10,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:10,661 INFO L130 PetriNetUnfolder]: 756/1375 cut-off events. [2022-12-13 11:45:10,661 INFO L131 PetriNetUnfolder]: For 84547/84547 co-relation queries the response was YES. [2022-12-13 11:45:10,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 84547/84547 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6894 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2022-12-13 11:45:10,676 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2022-12-13 11:45:10,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2022-12-13 11:45:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:45:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 11:45:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1864 transitions. [2022-12-13 11:45:10,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4707070707070707 [2022-12-13 11:45:10,691 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1864 transitions. [2022-12-13 11:45:10,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1864 transitions. [2022-12-13 11:45:10,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:10,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1864 transitions. [2022-12-13 11:45:10,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.13333333333333) internal successors, (1864), 30 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 132.0) internal successors, (4092), 31 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,698 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 132.0) internal successors, (4092), 31 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,698 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 1864 transitions. [2022-12-13 11:45:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2022-12-13 11:45:10,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2022-12-13 11:45:10,822 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2022-12-13 11:45:10,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2022-12-13 11:45:10,823 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2022-12-13 11:45:10,823 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2022-12-13 11:45:10,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:10,824 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:10,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:45:11,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:45:11,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1065997253, now seen corresponding path program 8 times [2022-12-13 11:45:11,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:11,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30164004] [2022-12-13 11:45:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:11,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30164004] [2022-12-13 11:45:11,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30164004] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641472468] [2022-12-13 11:45:11,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:45:11,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:11,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:11,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:45:11,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:45:11,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:11,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:45:11,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:11,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:11,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641472468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:11,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:11,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-12-13 11:45:11,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370934820] [2022-12-13 11:45:11,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:11,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:45:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:11,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:45:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:45:11,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:11,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 31 states, 31 states have (on average 58.354838709677416) internal successors, (1809), 31 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:11,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:11,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:11,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:12,989 INFO L130 PetriNetUnfolder]: 940/1683 cut-off events. [2022-12-13 11:45:12,989 INFO L131 PetriNetUnfolder]: For 117632/117632 co-relation queries the response was YES. [2022-12-13 11:45:12,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16451 conditions, 1683 events. 940/1683 cut-off events. For 117632/117632 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8001 event pairs, 18 based on Foata normal form. 52/1735 useless extension candidates. Maximal degree in co-relation 16366. Up to 574 conditions per place. [2022-12-13 11:45:13,001 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 90 selfloop transitions, 222 changer transitions 98/410 dead transitions. [2022-12-13 11:45:13,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 8862 flow [2022-12-13 11:45:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 11:45:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 11:45:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3222 transitions. [2022-12-13 11:45:13,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46940559440559443 [2022-12-13 11:45:13,004 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3222 transitions. [2022-12-13 11:45:13,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3222 transitions. [2022-12-13 11:45:13,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:13,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3222 transitions. [2022-12-13 11:45:13,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 61.96153846153846) internal successors, (3222), 52 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:13,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 132.0) internal successors, (6996), 53 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:13,014 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 132.0) internal successors, (6996), 53 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:13,014 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 52 states and 3222 transitions. [2022-12-13 11:45:13,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 8862 flow [2022-12-13 11:45:13,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 410 transitions, 7981 flow, removed 412 selfloop flow, removed 8 redundant places. [2022-12-13 11:45:13,203 INFO L231 Difference]: Finished difference. Result has 255 places, 248 transitions, 5156 flow [2022-12-13 11:45:13,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5156, PETRI_PLACES=255, PETRI_TRANSITIONS=248} [2022-12-13 11:45:13,203 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 237 predicate places. [2022-12-13 11:45:13,204 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 248 transitions, 5156 flow [2022-12-13 11:45:13,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 58.354838709677416) internal successors, (1809), 31 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:13,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:13,204 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:13,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:45:13,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 11:45:13,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash -357316222, now seen corresponding path program 9 times [2022-12-13 11:45:13,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:13,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70880535] [2022-12-13 11:45:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70880535] [2022-12-13 11:45:13,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70880535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006567681] [2022-12-13 11:45:13,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:45:13,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:13,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:13,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:13,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:45:13,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 11:45:13,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:45:13,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:13,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:14,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006567681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:14,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:14,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-13 11:45:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300443151] [2022-12-13 11:45:14,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 11:45:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 11:45:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 11:45:14,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:14,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 248 transitions, 5156 flow. Second operand has 50 states, 50 states have (on average 58.2) internal successors, (2910), 50 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:14,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:14,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:16,054 INFO L130 PetriNetUnfolder]: 1300/2403 cut-off events. [2022-12-13 11:45:16,054 INFO L131 PetriNetUnfolder]: For 323404/323404 co-relation queries the response was YES. [2022-12-13 11:45:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31690 conditions, 2403 events. 1300/2403 cut-off events. For 323404/323404 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12169 event pairs, 234 based on Foata normal form. 72/2475 useless extension candidates. Maximal degree in co-relation 31579. Up to 993 conditions per place. [2022-12-13 11:45:16,075 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 219 selfloop transitions, 179 changer transitions 103/501 dead transitions. [2022-12-13 11:45:16,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 501 transitions, 14353 flow [2022-12-13 11:45:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 11:45:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 11:45:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3325 transitions. [2022-12-13 11:45:16,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46647025813692483 [2022-12-13 11:45:16,081 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3325 transitions. [2022-12-13 11:45:16,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3325 transitions. [2022-12-13 11:45:16,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:16,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3325 transitions. [2022-12-13 11:45:16,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 61.574074074074076) internal successors, (3325), 54 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:16,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 132.0) internal successors, (7260), 55 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:16,098 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 132.0) internal successors, (7260), 55 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:16,098 INFO L175 Difference]: Start difference. First operand has 255 places, 248 transitions, 5156 flow. Second operand 54 states and 3325 transitions. [2022-12-13 11:45:16,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 501 transitions, 14353 flow [2022-12-13 11:45:16,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 501 transitions, 11122 flow, removed 1538 selfloop flow, removed 16 redundant places. [2022-12-13 11:45:16,826 INFO L231 Difference]: Finished difference. Result has 316 places, 340 transitions, 6942 flow [2022-12-13 11:45:16,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6942, PETRI_PLACES=316, PETRI_TRANSITIONS=340} [2022-12-13 11:45:16,827 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 298 predicate places. [2022-12-13 11:45:16,827 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 340 transitions, 6942 flow [2022-12-13 11:45:16,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 58.2) internal successors, (2910), 50 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:16,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:16,828 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:16,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:45:17,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:45:17,030 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1638862844, now seen corresponding path program 10 times [2022-12-13 11:45:17,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:17,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269022220] [2022-12-13 11:45:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:17,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:17,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269022220] [2022-12-13 11:45:17,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269022220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:17,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143717895] [2022-12-13 11:45:17,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:45:17,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:17,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:17,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:45:17,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:45:17,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:45:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:17,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:17,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143717895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:17,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:17,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2022-12-13 11:45:17,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212125144] [2022-12-13 11:45:17,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:17,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 11:45:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 11:45:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 11:45:18,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:18,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 340 transitions, 6942 flow. Second operand has 51 states, 51 states have (on average 58.21568627450981) internal successors, (2969), 51 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:18,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:18,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:20,346 INFO L130 PetriNetUnfolder]: 1652/3107 cut-off events. [2022-12-13 11:45:20,346 INFO L131 PetriNetUnfolder]: For 728913/728913 co-relation queries the response was YES. [2022-12-13 11:45:20,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45802 conditions, 3107 events. 1652/3107 cut-off events. For 728913/728913 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 16560 event pairs, 112 based on Foata normal form. 72/3179 useless extension candidates. Maximal degree in co-relation 45666. Up to 1266 conditions per place. [2022-12-13 11:45:20,374 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 152 selfloop transitions, 342 changer transitions 115/609 dead transitions. [2022-12-13 11:45:20,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 609 transitions, 16640 flow [2022-12-13 11:45:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 11:45:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-13 11:45:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3700 transitions. [2022-12-13 11:45:20,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2022-12-13 11:45:20,378 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3700 transitions. [2022-12-13 11:45:20,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3700 transitions. [2022-12-13 11:45:20,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:20,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3700 transitions. [2022-12-13 11:45:20,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 61.666666666666664) internal successors, (3700), 60 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:20,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 132.0) internal successors, (8052), 61 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:20,387 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 132.0) internal successors, (8052), 61 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:20,387 INFO L175 Difference]: Start difference. First operand has 316 places, 340 transitions, 6942 flow. Second operand 60 states and 3700 transitions. [2022-12-13 11:45:20,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 609 transitions, 16640 flow [2022-12-13 11:45:22,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 609 transitions, 14938 flow, removed 784 selfloop flow, removed 21 redundant places. [2022-12-13 11:45:22,061 INFO L231 Difference]: Finished difference. Result has 376 places, 431 transitions, 9562 flow [2022-12-13 11:45:22,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9562, PETRI_PLACES=376, PETRI_TRANSITIONS=431} [2022-12-13 11:45:22,061 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 358 predicate places. [2022-12-13 11:45:22,061 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 431 transitions, 9562 flow [2022-12-13 11:45:22,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 58.21568627450981) internal successors, (2969), 51 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:22,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:22,062 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:22,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:45:22,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:45:22,266 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 8508344, now seen corresponding path program 11 times [2022-12-13 11:45:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866060003] [2022-12-13 11:45:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:22,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866060003] [2022-12-13 11:45:22,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866060003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:22,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338940419] [2022-12-13 11:45:22,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:45:22,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:22,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:22,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:45:22,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 11:45:22,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:22,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:45:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:22,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338940419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:23,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:23,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-13 11:45:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592201361] [2022-12-13 11:45:23,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:23,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 11:45:23,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 11:45:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=2000, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 11:45:23,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:23,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 431 transitions, 9562 flow. Second operand has 50 states, 50 states have (on average 58.22) internal successors, (2911), 50 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:23,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:23,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:23,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:26,003 INFO L130 PetriNetUnfolder]: 2052/3823 cut-off events. [2022-12-13 11:45:26,003 INFO L131 PetriNetUnfolder]: For 1351849/1351849 co-relation queries the response was YES. [2022-12-13 11:45:26,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68152 conditions, 3823 events. 2052/3823 cut-off events. For 1351849/1351849 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 20300 event pairs, 16 based on Foata normal form. 80/3903 useless extension candidates. Maximal degree in co-relation 68004. Up to 1574 conditions per place. [2022-12-13 11:45:26,040 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 136 selfloop transitions, 490 changer transitions 139/765 dead transitions. [2022-12-13 11:45:26,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 765 transitions, 25518 flow [2022-12-13 11:45:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-13 11:45:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-12-13 11:45:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 5063 transitions. [2022-12-13 11:45:26,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4677568366592757 [2022-12-13 11:45:26,046 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 5063 transitions. [2022-12-13 11:45:26,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 5063 transitions. [2022-12-13 11:45:26,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:26,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 5063 transitions. [2022-12-13 11:45:26,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 61.74390243902439) internal successors, (5063), 82 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:26,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 132.0) internal successors, (10956), 83 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:26,072 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 132.0) internal successors, (10956), 83 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:26,073 INFO L175 Difference]: Start difference. First operand has 376 places, 431 transitions, 9562 flow. Second operand 82 states and 5063 transitions. [2022-12-13 11:45:26,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 765 transitions, 25518 flow [2022-12-13 11:45:28,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 765 transitions, 22743 flow, removed 1234 selfloop flow, removed 21 redundant places. [2022-12-13 11:45:28,659 INFO L231 Difference]: Finished difference. Result has 469 places, 523 transitions, 13353 flow [2022-12-13 11:45:28,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=7347, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=13353, PETRI_PLACES=469, PETRI_TRANSITIONS=523} [2022-12-13 11:45:28,660 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 451 predicate places. [2022-12-13 11:45:28,660 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 523 transitions, 13353 flow [2022-12-13 11:45:28,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 58.22) internal successors, (2911), 50 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:28,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:28,661 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:28,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:45:28,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:28,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -945863893, now seen corresponding path program 12 times [2022-12-13 11:45:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:28,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983583896] [2022-12-13 11:45:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:29,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983583896] [2022-12-13 11:45:29,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983583896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084112843] [2022-12-13 11:45:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:45:29,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:29,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:29,403 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:29,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:45:29,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-12-13 11:45:29,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:29,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 11:45:29,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084112843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:30,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:30,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-12-13 11:45:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517865764] [2022-12-13 11:45:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:30,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 11:45:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 11:45:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=3473, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 11:45:30,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:30,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 523 transitions, 13353 flow. Second operand has 68 states, 68 states have (on average 58.161764705882355) internal successors, (3955), 68 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:30,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:30,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:30,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:34,798 INFO L130 PetriNetUnfolder]: 2380/4415 cut-off events. [2022-12-13 11:45:34,798 INFO L131 PetriNetUnfolder]: For 2543737/2543737 co-relation queries the response was YES. [2022-12-13 11:45:34,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96062 conditions, 4415 events. 2380/4415 cut-off events. For 2543737/2543737 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 23679 event pairs, 22 based on Foata normal form. 56/4471 useless extension candidates. Maximal degree in co-relation 95882. Up to 1822 conditions per place. [2022-12-13 11:45:34,870 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 138 selfloop transitions, 582 changer transitions 170/890 dead transitions. [2022-12-13 11:45:34,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 890 transitions, 34817 flow [2022-12-13 11:45:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-13 11:45:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-12-13 11:45:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5435 transitions. [2022-12-13 11:45:34,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4678891184573003 [2022-12-13 11:45:34,874 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5435 transitions. [2022-12-13 11:45:34,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5435 transitions. [2022-12-13 11:45:34,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:34,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5435 transitions. [2022-12-13 11:45:34,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 61.76136363636363) internal successors, (5435), 88 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:34,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 132.0) internal successors, (11748), 89 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:34,888 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 132.0) internal successors, (11748), 89 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:34,888 INFO L175 Difference]: Start difference. First operand has 469 places, 523 transitions, 13353 flow. Second operand 88 states and 5435 transitions. [2022-12-13 11:45:34,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 890 transitions, 34817 flow [2022-12-13 11:45:40,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 890 transitions, 27595 flow, removed 3384 selfloop flow, removed 25 redundant places. [2022-12-13 11:45:40,317 INFO L231 Difference]: Finished difference. Result has 554 places, 615 transitions, 14842 flow [2022-12-13 11:45:40,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=14842, PETRI_PLACES=554, PETRI_TRANSITIONS=615} [2022-12-13 11:45:40,318 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 536 predicate places. [2022-12-13 11:45:40,318 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 615 transitions, 14842 flow [2022-12-13 11:45:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 58.161764705882355) internal successors, (3955), 68 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:40,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:40,319 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:40,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:45:40,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:45:40,519 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1466214132, now seen corresponding path program 13 times [2022-12-13 11:45:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:40,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356422005] [2022-12-13 11:45:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:40,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:41,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356422005] [2022-12-13 11:45:41,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356422005] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358181877] [2022-12-13 11:45:41,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:45:41,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:41,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:41,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:45:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 11:45:41,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:41,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:41,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358181877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:41,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:41,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2022-12-13 11:45:41,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169758368] [2022-12-13 11:45:41,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 11:45:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 11:45:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 11:45:41,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 132 [2022-12-13 11:45:41,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 615 transitions, 14842 flow. Second operand has 46 states, 46 states have (on average 58.130434782608695) internal successors, (2674), 46 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:41,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:41,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 132 [2022-12-13 11:45:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:45,400 INFO L130 PetriNetUnfolder]: 2468/4563 cut-off events. [2022-12-13 11:45:45,400 INFO L131 PetriNetUnfolder]: For 3028129/3028129 co-relation queries the response was YES. [2022-12-13 11:45:45,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104539 conditions, 4563 events. 2468/4563 cut-off events. For 3028129/3028129 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 24319 event pairs, 28 based on Foata normal form. 4/4567 useless extension candidates. Maximal degree in co-relation 104336. Up to 1866 conditions per place. [2022-12-13 11:45:45,459 INFO L137 encePairwiseOnDemand]: 127/132 looper letters, 128 selfloop transitions, 592 changer transitions 154/874 dead transitions. [2022-12-13 11:45:45,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 874 transitions, 32004 flow [2022-12-13 11:45:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-13 11:45:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-12-13 11:45:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4928 transitions. [2022-12-13 11:45:45,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-13 11:45:45,463 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4928 transitions. [2022-12-13 11:45:45,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4928 transitions. [2022-12-13 11:45:45,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:45,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4928 transitions. [2022-12-13 11:45:45,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 61.6) internal successors, (4928), 80 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:45,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 132.0) internal successors, (10692), 81 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:45,501 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 132.0) internal successors, (10692), 81 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:45,501 INFO L175 Difference]: Start difference. First operand has 554 places, 615 transitions, 14842 flow. Second operand 80 states and 4928 transitions. [2022-12-13 11:45:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 874 transitions, 32004 flow [2022-12-13 11:45:52,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 874 transitions, 26284 flow, removed 2478 selfloop flow, removed 50 redundant places. [2022-12-13 11:45:52,778 INFO L231 Difference]: Finished difference. Result has 591 places, 637 transitions, 12979 flow [2022-12-13 11:45:52,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=11042, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=12979, PETRI_PLACES=591, PETRI_TRANSITIONS=637} [2022-12-13 11:45:52,778 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 573 predicate places. [2022-12-13 11:45:52,779 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 637 transitions, 12979 flow [2022-12-13 11:45:52,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 58.130434782608695) internal successors, (2674), 46 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:52,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:52,779 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:52,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:45:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:45:52,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -284584741, now seen corresponding path program 14 times [2022-12-13 11:45:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:52,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073013479] [2022-12-13 11:45:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:52,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:45:53,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:45:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:45:53,063 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:45:53,063 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:45:53,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-13 11:45:53,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-13 11:45:53,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-13 11:45:53,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 11:45:53,066 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2022-12-13 11:45:53,069 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 11:45:53,069 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 11:45:53,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 11:45:53 BasicIcfg [2022-12-13 11:45:53,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 11:45:53,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 11:45:53,111 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 11:45:53,111 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 11:45:53,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:45:02" (3/4) ... [2022-12-13 11:45:53,113 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 11:45:53,160 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 11:45:53,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 11:45:53,161 INFO L158 Benchmark]: Toolchain (without parser) took 51124.65ms. Allocated memory was 155.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 119.8MB in the beginning and 363.8MB in the end (delta: -244.0MB). Peak memory consumption was 811.5MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,161 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 117.4MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:45:53,161 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.72ms. Allocated memory is still 155.2MB. Free memory was 119.8MB in the beginning and 99.8MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,162 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.19ms. Allocated memory is still 155.2MB. Free memory was 99.8MB in the beginning and 97.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,162 INFO L158 Benchmark]: Boogie Preprocessor took 19.89ms. Allocated memory is still 155.2MB. Free memory was 97.7MB in the beginning and 96.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,162 INFO L158 Benchmark]: RCFGBuilder took 293.14ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 83.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,162 INFO L158 Benchmark]: TraceAbstraction took 50417.28ms. Allocated memory was 155.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 83.1MB in the beginning and 376.4MB in the end (delta: -293.4MB). Peak memory consumption was 763.2MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,162 INFO L158 Benchmark]: Witness Printer took 49.70ms. Allocated memory is still 1.2GB. Free memory was 376.4MB in the beginning and 363.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 11:45:53,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 117.4MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.72ms. Allocated memory is still 155.2MB. Free memory was 119.8MB in the beginning and 99.8MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.19ms. Allocated memory is still 155.2MB. Free memory was 99.8MB in the beginning and 97.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.89ms. Allocated memory is still 155.2MB. Free memory was 97.7MB in the beginning and 96.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 293.14ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 83.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 50417.28ms. Allocated memory was 155.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 83.1MB in the beginning and 376.4MB in the end (delta: -293.4MB). Peak memory consumption was 763.2MB. Max. memory is 16.1GB. * Witness Printer took 49.70ms. Allocated memory is still 1.2GB. Free memory was 376.4MB in the beginning and 363.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 70 PlacesBefore, 18 PlacesAfterwards, 68 TransitionsBefore, 14 TransitionsAfterwards, 1122 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 62 TotalNumberOfCompositions, 1071 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 912, independent: 879, independent conditional: 0, independent unconditional: 879, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 601, independent: 588, independent conditional: 0, independent unconditional: 588, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 912, independent: 291, independent conditional: 0, independent unconditional: 291, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 601, unknown conditional: 0, unknown unconditional: 601] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={50:51}, argv={50:51}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={50:51}, argv={50:51}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={50:51}, argv={50:51}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=1, k=0] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=12, k=11] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=12] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=14, k=13] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=14] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L719] 0 int condJ = j >= (2*20 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={50:51}, argv={50:51}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=20, k=20] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 50.3s, OverallIterations: 17, TraceHistogramMax: 20, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 38.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7952 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7840 mSDsluCounter, 1215 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1165 mSDsCounter, 887 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6063 IncrementalHoareTripleChecker+Invalid, 6950 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 887 mSolverCounterUnsat, 50 mSDtfsCounter, 6063 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1206 GetRequests, 298 SyntacticMatches, 49 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26146 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14842occurred in iteration=15, InterpolantAutomatonStates: 557, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 618 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 796 ConstructedInterpolants, 0 QuantifiedInterpolants, 3374 SizeOfPredicates, 172 NumberOfNonLiveVariables, 2090 ConjunctsInSsa, 240 ConjunctsInUnsatCore, 38 InterpolantComputations, 5 PerfectInterpolantSequences, 12/2931 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 11:45:53,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4645f128-48bc-4310-bcaf-ee3470c88c7c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE