./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/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_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/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_5e424bb3-6ef7-45c4-acab-108cd0163fe5/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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --- 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 15:54:24,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:54:24,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:54:24,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:54:24,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:54:24,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:54:24,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:54:24,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:54:24,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:54:24,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:54:24,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:54:24,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:54:24,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:54:24,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:54:24,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:54:24,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:54:24,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:54:24,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:54:24,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:54:24,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:54:24,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:54:24,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:54:24,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:54:24,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:54:24,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:54:24,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:54:24,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:54:24,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:54:24,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:54:24,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:54:24,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:54:24,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:54:24,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:54:24,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:54:24,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:54:24,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:54:24,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:54:24,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:54:24,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:54:24,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:54:24,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:54:24,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:54:24,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:54:24,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:54:24,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:54:24,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:54:24,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:54:24,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:54:24,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:54:24,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:54:24,965 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:54:24,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:54:24,965 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:54:24,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:54:24,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:54:24,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:54:24,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:54:24,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:54:24,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:54:24,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:54:24,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:54:24,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:54:24,968 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:54:24,969 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_5e424bb3-6ef7-45c4-acab-108cd0163fe5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a [2022-12-13 15:54:25,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:54:25,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:54:25,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:54:25,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:54:25,149 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:54:25,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2022-12-13 15:54:27,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:54:27,809 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:54:27,809 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2022-12-13 15:54:27,814 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/data/b25a474dd/755e6adc92ba463685997ed72b472dc3/FLAGac36fb1cd [2022-12-13 15:54:27,825 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/data/b25a474dd/755e6adc92ba463685997ed72b472dc3 [2022-12-13 15:54:27,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:54:27,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:54:27,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:54:27,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:54:27,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:54:27,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:54:27" (1/1) ... [2022-12-13 15:54:27,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3792496d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:27, skipping insertion in model container [2022-12-13 15:54:27,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:54:27" (1/1) ... [2022-12-13 15:54:27,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:54:27,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:54:27,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,993 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,996 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,996 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:27,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:27,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,005 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_5e424bb3-6ef7-45c4-acab-108cd0163fe5/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3027,3040] [2022-12-13 15:54:28,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:54:28,019 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:54:28,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:54:28,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:54:28,046 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3027,3040] [2022-12-13 15:54:28,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:54:28,062 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:54:28,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28 WrapperNode [2022-12-13 15:54:28,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:54:28,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:54:28,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:54:28,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:54:28,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,101 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2022-12-13 15:54:28,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:54:28,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:54:28,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:54:28,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:54:28,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,122 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:54:28,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:54:28,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:54:28,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:54:28,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (1/1) ... [2022-12-13 15:54:28,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:54:28,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:28,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:54:28,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:54:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:54:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:54:28,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:54:28,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:54:28,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 15:54:28,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:54:28,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:54:28,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:54:28,186 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 15:54:28,266 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:54:28,267 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:54:28,451 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:54:28,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:54:28,500 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 15:54:28,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:54:28 BoogieIcfgContainer [2022-12-13 15:54:28,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:54:28,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:54:28,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:54:28,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:54:28,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:54:27" (1/3) ... [2022-12-13 15:54:28,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e2ddad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:54:28, skipping insertion in model container [2022-12-13 15:54:28,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:54:28" (2/3) ... [2022-12-13 15:54:28,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e2ddad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:54:28, skipping insertion in model container [2022-12-13 15:54:28,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:54:28" (3/3) ... [2022-12-13 15:54:28,508 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2022-12-13 15:54:28,515 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:54:28,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:54:28,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:54:28,523 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:54:28,569 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 15:54:28,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2022-12-13 15:54:28,635 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2022-12-13 15:54:28,635 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 15:54:28,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-12-13 15:54:28,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2022-12-13 15:54:28,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 208 flow [2022-12-13 15:54:28,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:54:28,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 95 transitions, 208 flow [2022-12-13 15:54:28,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 95 transitions, 208 flow [2022-12-13 15:54:28,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 208 flow [2022-12-13 15:54:28,676 INFO L130 PetriNetUnfolder]: 7/95 cut-off events. [2022-12-13 15:54:28,676 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 15:54:28,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 7/95 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-12-13 15:54:28,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 1250 [2022-12-13 15:54:31,023 INFO L134 LiptonReduction]: Checked pairs total: 1793 [2022-12-13 15:54:31,023 INFO L136 LiptonReduction]: Total number of compositions: 83 [2022-12-13 15:54:31,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:54:31,040 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;@166f6850, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:54:31,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 15:54:31,047 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2022-12-13 15:54:31,047 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 15:54:31,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:31,048 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:31,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1586354749, now seen corresponding path program 1 times [2022-12-13 15:54:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248098888] [2022-12-13 15:54:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:31,507 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 15:54:31,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:31,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248098888] [2022-12-13 15:54:31,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248098888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:54:31,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:54:31,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:54:31,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139067467] [2022-12-13 15:54:31,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:54:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:54:31,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:54:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:54:31,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 192 [2022-12-13 15:54:31,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:31,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:31,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 192 [2022-12-13 15:54:31,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:31,798 INFO L130 PetriNetUnfolder]: 348/572 cut-off events. [2022-12-13 15:54:31,798 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2022-12-13 15:54:31,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 572 events. 348/572 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2314 event pairs, 49 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 925. Up to 297 conditions per place. [2022-12-13 15:54:31,805 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 50 selfloop transitions, 5 changer transitions 18/75 dead transitions. [2022-12-13 15:54:31,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 75 transitions, 350 flow [2022-12-13 15:54:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:54:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:54:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2022-12-13 15:54:31,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2022-12-13 15:54:31,817 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2022-12-13 15:54:31,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2022-12-13 15:54:31,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:31,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2022-12-13 15:54:31,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:31,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:31,830 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:31,831 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 684 transitions. [2022-12-13 15:54:31,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 75 transitions, 350 flow [2022-12-13 15:54:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 15:54:31,836 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2022-12-13 15:54:31,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2022-12-13 15:54:31,840 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-12-13 15:54:31,840 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2022-12-13 15:54:31,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:31,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:31,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:31,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:54:31,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2086900335, now seen corresponding path program 2 times [2022-12-13 15:54:31,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:31,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857084536] [2022-12-13 15:54:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:31,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:31,946 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 15:54:31,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857084536] [2022-12-13 15:54:31,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857084536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:54:31,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:54:31,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:54:31,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422715306] [2022-12-13 15:54:31,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:54:31,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:54:31,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:54:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:54:31,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 192 [2022-12-13 15:54:31,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:31,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:31,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 192 [2022-12-13 15:54:31,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:32,089 INFO L130 PetriNetUnfolder]: 251/422 cut-off events. [2022-12-13 15:54:32,090 INFO L131 PetriNetUnfolder]: For 614/630 co-relation queries the response was YES. [2022-12-13 15:54:32,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 422 events. 251/422 cut-off events. For 614/630 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1526 event pairs, 23 based on Foata normal form. 24/434 useless extension candidates. Maximal degree in co-relation 841. Up to 244 conditions per place. [2022-12-13 15:54:32,092 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2022-12-13 15:54:32,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 248 flow [2022-12-13 15:54:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:54:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:54:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2022-12-13 15:54:32,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5091145833333334 [2022-12-13 15:54:32,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2022-12-13 15:54:32,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2022-12-13 15:54:32,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:32,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2022-12-13 15:54:32,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,104 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 391 transitions. [2022-12-13 15:54:32,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 248 flow [2022-12-13 15:54:32,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 233 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 15:54:32,107 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2022-12-13 15:54:32,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-12-13 15:54:32,108 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-12-13 15:54:32,108 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2022-12-13 15:54:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:32,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:32,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:54:32,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1102388521, now seen corresponding path program 3 times [2022-12-13 15:54:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:32,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54943749] [2022-12-13 15:54:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:32,209 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 15:54:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:32,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54943749] [2022-12-13 15:54:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54943749] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:54:32,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:54:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:54:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728191845] [2022-12-13 15:54:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:54:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:54:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:54:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:54:32,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 192 [2022-12-13 15:54:32,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:32,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 192 [2022-12-13 15:54:32,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:32,342 INFO L130 PetriNetUnfolder]: 162/285 cut-off events. [2022-12-13 15:54:32,342 INFO L131 PetriNetUnfolder]: For 448/464 co-relation queries the response was YES. [2022-12-13 15:54:32,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 285 events. 162/285 cut-off events. For 448/464 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 976 event pairs, 17 based on Foata normal form. 52/335 useless extension candidates. Maximal degree in co-relation 870. Up to 117 conditions per place. [2022-12-13 15:54:32,344 INFO L137 encePairwiseOnDemand]: 186/192 looper letters, 33 selfloop transitions, 7 changer transitions 6/49 dead transitions. [2022-12-13 15:54:32,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 318 flow [2022-12-13 15:54:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:54:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:54:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-12-13 15:54:32,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2022-12-13 15:54:32,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-12-13 15:54:32,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-12-13 15:54:32,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:32,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-12-13 15:54:32,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,350 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,351 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 5 states and 478 transitions. [2022-12-13 15:54:32,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 318 flow [2022-12-13 15:54:32,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:54:32,352 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 160 flow [2022-12-13 15:54:32,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-12-13 15:54:32,353 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2022-12-13 15:54:32,353 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 160 flow [2022-12-13 15:54:32,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:32,353 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:54:32,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash 868085637, now seen corresponding path program 1 times [2022-12-13 15:54:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:32,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929320402] [2022-12-13 15:54:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:32,544 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 15:54:32,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:32,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929320402] [2022-12-13 15:54:32,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929320402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:32,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540244706] [2022-12-13 15:54:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:32,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:32,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:32,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:32,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:54:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:32,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:54:32,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:32,744 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 15:54:32,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:32,908 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 15:54:32,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540244706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:32,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:32,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 15:54:32,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729765018] [2022-12-13 15:54:32,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:32,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:54:32,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:32,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:54:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:54:32,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2022-12-13 15:54:32,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:32,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:32,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2022-12-13 15:54:32,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:33,474 INFO L130 PetriNetUnfolder]: 422/744 cut-off events. [2022-12-13 15:54:33,474 INFO L131 PetriNetUnfolder]: For 2590/2644 co-relation queries the response was YES. [2022-12-13 15:54:33,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3011 conditions, 744 events. 422/744 cut-off events. For 2590/2644 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3386 event pairs, 18 based on Foata normal form. 94/824 useless extension candidates. Maximal degree in co-relation 1802. Up to 321 conditions per place. [2022-12-13 15:54:33,480 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 81 selfloop transitions, 33 changer transitions 39/157 dead transitions. [2022-12-13 15:54:33,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 157 transitions, 1189 flow [2022-12-13 15:54:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:54:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:54:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1910 transitions. [2022-12-13 15:54:33,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47371031746031744 [2022-12-13 15:54:33,486 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1910 transitions. [2022-12-13 15:54:33,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1910 transitions. [2022-12-13 15:54:33,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:33,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1910 transitions. [2022-12-13 15:54:33,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 90.95238095238095) internal successors, (1910), 21 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:33,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 192.0) internal successors, (4224), 22 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:33,500 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 192.0) internal successors, (4224), 22 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:33,500 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 160 flow. Second operand 21 states and 1910 transitions. [2022-12-13 15:54:33,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 157 transitions, 1189 flow [2022-12-13 15:54:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 157 transitions, 1181 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 15:54:33,507 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 550 flow [2022-12-13 15:54:33,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=550, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-12-13 15:54:33,508 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2022-12-13 15:54:33,508 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 550 flow [2022-12-13 15:54:33,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:33,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:33,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:33,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:54:33,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:33,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash 714671720, now seen corresponding path program 1 times [2022-12-13 15:54:33,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:33,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165718161] [2022-12-13 15:54:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:33,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:33,907 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 15:54:33,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165718161] [2022-12-13 15:54:33,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165718161] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716299703] [2022-12-13 15:54:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:33,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:33,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:33,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:54:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:54:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:34,060 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 15:54:34,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:34,187 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 15:54:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716299703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:34,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:34,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 15:54:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380512068] [2022-12-13 15:54:34,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:54:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:54:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:54:34,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2022-12-13 15:54:34,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 550 flow. Second operand has 12 states, 12 states have (on average 86.91666666666667) internal successors, (1043), 12 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:34,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:34,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2022-12-13 15:54:34,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:34,694 INFO L130 PetriNetUnfolder]: 433/743 cut-off events. [2022-12-13 15:54:34,694 INFO L131 PetriNetUnfolder]: For 5555/5567 co-relation queries the response was YES. [2022-12-13 15:54:34,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3766 conditions, 743 events. 433/743 cut-off events. For 5555/5567 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3160 event pairs, 8 based on Foata normal form. 44/782 useless extension candidates. Maximal degree in co-relation 2691. Up to 327 conditions per place. [2022-12-13 15:54:34,700 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 61 selfloop transitions, 25 changer transitions 64/156 dead transitions. [2022-12-13 15:54:34,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 156 transitions, 1510 flow [2022-12-13 15:54:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:54:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 15:54:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1546 transitions. [2022-12-13 15:54:34,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4736519607843137 [2022-12-13 15:54:34,707 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1546 transitions. [2022-12-13 15:54:34,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1546 transitions. [2022-12-13 15:54:34,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:34,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1546 transitions. [2022-12-13 15:54:34,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.94117647058823) internal successors, (1546), 17 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:34,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 192.0) internal successors, (3456), 18 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:34,723 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 192.0) internal successors, (3456), 18 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:34,723 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 550 flow. Second operand 17 states and 1546 transitions. [2022-12-13 15:54:34,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 156 transitions, 1510 flow [2022-12-13 15:54:34,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 156 transitions, 1138 flow, removed 174 selfloop flow, removed 10 redundant places. [2022-12-13 15:54:34,748 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 403 flow [2022-12-13 15:54:34,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2022-12-13 15:54:34,749 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2022-12-13 15:54:34,749 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 403 flow [2022-12-13 15:54:34,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.91666666666667) internal successors, (1043), 12 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:34,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:34,751 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:34,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:54:34,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:34,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2060546247, now seen corresponding path program 2 times [2022-12-13 15:54:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678710389] [2022-12-13 15:54:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:35,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678710389] [2022-12-13 15:54:35,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678710389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605616624] [2022-12-13 15:54:35,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:54:35,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:35,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:35,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:54:35,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:54:35,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:54:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:54:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:35,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:36,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605616624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:36,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:36,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 15:54:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092743369] [2022-12-13 15:54:36,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:54:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:54:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:54:36,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2022-12-13 15:54:36,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 403 flow. Second operand has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:36,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:36,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2022-12-13 15:54:36,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:37,490 INFO L130 PetriNetUnfolder]: 838/1466 cut-off events. [2022-12-13 15:54:37,491 INFO L131 PetriNetUnfolder]: For 7974/8087 co-relation queries the response was YES. [2022-12-13 15:54:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 1466 events. 838/1466 cut-off events. For 7974/8087 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7424 event pairs, 26 based on Foata normal form. 131/1559 useless extension candidates. Maximal degree in co-relation 6381. Up to 604 conditions per place. [2022-12-13 15:54:37,503 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 138 selfloop transitions, 65 changer transitions 101/310 dead transitions. [2022-12-13 15:54:37,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 310 transitions, 2920 flow [2022-12-13 15:54:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 15:54:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 15:54:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3539 transitions. [2022-12-13 15:54:37,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47262286324786323 [2022-12-13 15:54:37,513 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3539 transitions. [2022-12-13 15:54:37,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3539 transitions. [2022-12-13 15:54:37,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:37,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3539 transitions. [2022-12-13 15:54:37,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 90.74358974358974) internal successors, (3539), 39 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:37,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 192.0) internal successors, (7680), 40 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:37,537 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 192.0) internal successors, (7680), 40 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:37,537 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 403 flow. Second operand 39 states and 3539 transitions. [2022-12-13 15:54:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 310 transitions, 2920 flow [2022-12-13 15:54:37,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 310 transitions, 2476 flow, removed 169 selfloop flow, removed 12 redundant places. [2022-12-13 15:54:37,571 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 869 flow [2022-12-13 15:54:37,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=869, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-12-13 15:54:37,572 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2022-12-13 15:54:37,572 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 869 flow [2022-12-13 15:54:37,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:37,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:37,573 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:37,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:54:37,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 15:54:37,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash -501808048, now seen corresponding path program 1 times [2022-12-13 15:54:37,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:37,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188541772] [2022-12-13 15:54:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:38,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188541772] [2022-12-13 15:54:38,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188541772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354394041] [2022-12-13 15:54:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:38,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:38,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:38,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:38,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:54:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:54:38,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:38,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:38,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354394041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:38,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:38,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 15:54:38,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254306941] [2022-12-13 15:54:38,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:38,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:54:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:54:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:54:38,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:54:38,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 869 flow. Second operand has 19 states, 19 states have (on average 84.73684210526316) internal successors, (1610), 19 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:38,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:38,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:54:38,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:40,249 INFO L130 PetriNetUnfolder]: 990/1736 cut-off events. [2022-12-13 15:54:40,249 INFO L131 PetriNetUnfolder]: For 8761/8886 co-relation queries the response was YES. [2022-12-13 15:54:40,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8282 conditions, 1736 events. 990/1736 cut-off events. For 8761/8886 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9225 event pairs, 30 based on Foata normal form. 151/1839 useless extension candidates. Maximal degree in co-relation 7245. Up to 659 conditions per place. [2022-12-13 15:54:40,257 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 134 selfloop transitions, 81 changer transitions 101/322 dead transitions. [2022-12-13 15:54:40,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 322 transitions, 3068 flow [2022-12-13 15:54:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 15:54:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 15:54:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3183 transitions. [2022-12-13 15:54:40,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4605034722222222 [2022-12-13 15:54:40,262 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3183 transitions. [2022-12-13 15:54:40,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3183 transitions. [2022-12-13 15:54:40,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:40,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3183 transitions. [2022-12-13 15:54:40,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 88.41666666666667) internal successors, (3183), 36 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:40,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 192.0) internal successors, (7104), 37 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:40,273 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 192.0) internal successors, (7104), 37 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:40,273 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 869 flow. Second operand 36 states and 3183 transitions. [2022-12-13 15:54:40,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 322 transitions, 3068 flow [2022-12-13 15:54:40,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 322 transitions, 2534 flow, removed 217 selfloop flow, removed 14 redundant places. [2022-12-13 15:54:40,297 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 1132 flow [2022-12-13 15:54:40,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1132, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2022-12-13 15:54:40,297 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2022-12-13 15:54:40,297 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 1132 flow [2022-12-13 15:54:40,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.73684210526316) internal successors, (1610), 19 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:40,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:40,298 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:40,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 15:54:40,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:40,499 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash -386698117, now seen corresponding path program 2 times [2022-12-13 15:54:40,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190708647] [2022-12-13 15:54:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190708647] [2022-12-13 15:54:40,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190708647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994094795] [2022-12-13 15:54:40,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:54:40,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:40,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:40,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:54:40,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:54:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:54:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:54:40,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:41,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:41,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994094795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:41,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:41,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 15:54:41,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737705720] [2022-12-13 15:54:41,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:41,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:54:41,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:54:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:54:41,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:54:41,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 1132 flow. Second operand has 18 states, 18 states have (on average 84.44444444444444) internal successors, (1520), 18 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:41,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:41,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:54:41,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:43,532 INFO L130 PetriNetUnfolder]: 1631/2871 cut-off events. [2022-12-13 15:54:43,533 INFO L131 PetriNetUnfolder]: For 16266/16334 co-relation queries the response was YES. [2022-12-13 15:54:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14018 conditions, 2871 events. 1631/2871 cut-off events. For 16266/16334 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16709 event pairs, 8 based on Foata normal form. 186/3042 useless extension candidates. Maximal degree in co-relation 13933. Up to 821 conditions per place. [2022-12-13 15:54:43,546 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 176 selfloop transitions, 92 changer transitions 222/501 dead transitions. [2022-12-13 15:54:43,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 501 transitions, 5041 flow [2022-12-13 15:54:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 15:54:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 15:54:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4280 transitions. [2022-12-13 15:54:43,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2022-12-13 15:54:43,553 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4280 transitions. [2022-12-13 15:54:43,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4280 transitions. [2022-12-13 15:54:43,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:43,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4280 transitions. [2022-12-13 15:54:43,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 89.16666666666667) internal successors, (4280), 48 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:43,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 192.0) internal successors, (9408), 49 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:43,566 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 192.0) internal successors, (9408), 49 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:43,566 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 1132 flow. Second operand 48 states and 4280 transitions. [2022-12-13 15:54:43,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 501 transitions, 5041 flow [2022-12-13 15:54:43,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 501 transitions, 4468 flow, removed 254 selfloop flow, removed 17 redundant places. [2022-12-13 15:54:43,607 INFO L231 Difference]: Finished difference. Result has 151 places, 163 transitions, 1613 flow [2022-12-13 15:54:43,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1613, PETRI_PLACES=151, PETRI_TRANSITIONS=163} [2022-12-13 15:54:43,608 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2022-12-13 15:54:43,608 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 163 transitions, 1613 flow [2022-12-13 15:54:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 84.44444444444444) internal successors, (1520), 18 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:43,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:43,609 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:43,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:54:43,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:43,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2014714708, now seen corresponding path program 3 times [2022-12-13 15:54:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515978364] [2022-12-13 15:54:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:44,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:44,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515978364] [2022-12-13 15:54:44,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515978364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:44,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734489323] [2022-12-13 15:54:44,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:54:44,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:44,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:44,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:54:44,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:54:44,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:54:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:54:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:44,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:45,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734489323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:45,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:45,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 15:54:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581555651] [2022-12-13 15:54:45,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:45,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:54:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:54:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:54:45,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:54:45,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 163 transitions, 1613 flow. Second operand has 21 states, 21 states have (on average 84.47619047619048) internal successors, (1774), 21 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:45,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:45,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:54:45,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:47,314 INFO L130 PetriNetUnfolder]: 1707/3059 cut-off events. [2022-12-13 15:54:47,314 INFO L131 PetriNetUnfolder]: For 44748/44875 co-relation queries the response was YES. [2022-12-13 15:54:47,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18121 conditions, 3059 events. 1707/3059 cut-off events. For 44748/44875 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18482 event pairs, 46 based on Foata normal form. 147/3160 useless extension candidates. Maximal degree in co-relation 18027. Up to 899 conditions per place. [2022-12-13 15:54:47,333 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 226 selfloop transitions, 134 changer transitions 126/495 dead transitions. [2022-12-13 15:54:47,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 495 transitions, 6221 flow [2022-12-13 15:54:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 15:54:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 15:54:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4595 transitions. [2022-12-13 15:54:47,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4602363782051282 [2022-12-13 15:54:47,350 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4595 transitions. [2022-12-13 15:54:47,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4595 transitions. [2022-12-13 15:54:47,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:47,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4595 transitions. [2022-12-13 15:54:47,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 88.36538461538461) internal successors, (4595), 52 states have internal predecessors, (4595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:47,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 192.0) internal successors, (10176), 53 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:47,363 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 192.0) internal successors, (10176), 53 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:47,363 INFO L175 Difference]: Start difference. First operand has 151 places, 163 transitions, 1613 flow. Second operand 52 states and 4595 transitions. [2022-12-13 15:54:47,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 495 transitions, 6221 flow [2022-12-13 15:54:47,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 495 transitions, 4713 flow, removed 656 selfloop flow, removed 31 redundant places. [2022-12-13 15:54:47,504 INFO L231 Difference]: Finished difference. Result has 163 places, 232 transitions, 2413 flow [2022-12-13 15:54:47,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2413, PETRI_PLACES=163, PETRI_TRANSITIONS=232} [2022-12-13 15:54:47,505 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2022-12-13 15:54:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 232 transitions, 2413 flow [2022-12-13 15:54:47,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.47619047619048) internal successors, (1774), 21 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:47,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:47,505 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:47,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 15:54:47,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 15:54:47,707 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1573526022, now seen corresponding path program 4 times [2022-12-13 15:54:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:47,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737988459] [2022-12-13 15:54:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:47,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:47,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737988459] [2022-12-13 15:54:47,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737988459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892583230] [2022-12-13 15:54:47,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:54:47,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:47,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:47,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:47,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:54:48,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:54:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:54:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:54:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:48,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:48,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892583230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:48,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:48,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 15:54:48,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054957272] [2022-12-13 15:54:48,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:54:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:54:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:54:49,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:54:49,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 232 transitions, 2413 flow. Second operand has 21 states, 21 states have (on average 84.76190476190476) internal successors, (1780), 21 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:49,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:49,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:54:49,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:54:51,395 INFO L130 PetriNetUnfolder]: 2176/3860 cut-off events. [2022-12-13 15:54:51,395 INFO L131 PetriNetUnfolder]: For 32421/32515 co-relation queries the response was YES. [2022-12-13 15:54:51,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20532 conditions, 3860 events. 2176/3860 cut-off events. For 32421/32515 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23744 event pairs, 26 based on Foata normal form. 186/4011 useless extension candidates. Maximal degree in co-relation 19886. Up to 852 conditions per place. [2022-12-13 15:54:51,417 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 264 selfloop transitions, 142 changer transitions 196/619 dead transitions. [2022-12-13 15:54:51,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 619 transitions, 7095 flow [2022-12-13 15:54:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 15:54:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 15:54:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4630 transitions. [2022-12-13 15:54:51,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46374198717948717 [2022-12-13 15:54:51,422 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4630 transitions. [2022-12-13 15:54:51,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4630 transitions. [2022-12-13 15:54:51,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:51,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4630 transitions. [2022-12-13 15:54:51,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 89.03846153846153) internal successors, (4630), 52 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:51,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 192.0) internal successors, (10176), 53 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:51,436 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 192.0) internal successors, (10176), 53 states have internal predecessors, (10176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:51,436 INFO L175 Difference]: Start difference. First operand has 163 places, 232 transitions, 2413 flow. Second operand 52 states and 4630 transitions. [2022-12-13 15:54:51,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 619 transitions, 7095 flow [2022-12-13 15:54:51,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 619 transitions, 6239 flow, removed 411 selfloop flow, removed 18 redundant places. [2022-12-13 15:54:51,515 INFO L231 Difference]: Finished difference. Result has 195 places, 277 transitions, 3129 flow [2022-12-13 15:54:51,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3129, PETRI_PLACES=195, PETRI_TRANSITIONS=277} [2022-12-13 15:54:51,516 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2022-12-13 15:54:51,516 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 277 transitions, 3129 flow [2022-12-13 15:54:51,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.76190476190476) internal successors, (1780), 21 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:51,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:51,517 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:51,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:54:51,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:51,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:54:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:51,720 INFO L85 PathProgramCache]: Analyzing trace with hash -629991602, now seen corresponding path program 5 times [2022-12-13 15:54:51,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:51,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98874887] [2022-12-13 15:54:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:52,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:52,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98874887] [2022-12-13 15:54:52,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98874887] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019787138] [2022-12-13 15:54:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:54:52,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:52,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:52,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:54:52,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 15:54:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:54:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:54:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:52,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:54,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019787138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:54:54,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:54:54,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-12-13 15:54:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775876969] [2022-12-13 15:54:54,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 15:54:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 15:54:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-12-13 15:54:54,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 192 [2022-12-13 15:54:54,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 277 transitions, 3129 flow. Second operand has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:54:54,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:54,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 192 [2022-12-13 15:54:54,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:01,924 INFO L130 PetriNetUnfolder]: 4351/7212 cut-off events. [2022-12-13 15:55:01,924 INFO L131 PetriNetUnfolder]: For 59235/59235 co-relation queries the response was YES. [2022-12-13 15:55:01,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39073 conditions, 7212 events. 4351/7212 cut-off events. For 59235/59235 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 43448 event pairs, 101 based on Foata normal form. 124/7336 useless extension candidates. Maximal degree in co-relation 38921. Up to 1417 conditions per place. [2022-12-13 15:55:01,961 INFO L137 encePairwiseOnDemand]: 182/192 looper letters, 450 selfloop transitions, 364 changer transitions 277/1091 dead transitions. [2022-12-13 15:55:01,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1091 transitions, 13549 flow [2022-12-13 15:55:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-12-13 15:55:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-12-13 15:55:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 9124 transitions. [2022-12-13 15:55:01,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4400077160493827 [2022-12-13 15:55:01,968 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 9124 transitions. [2022-12-13 15:55:01,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 9124 transitions. [2022-12-13 15:55:01,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:01,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 9124 transitions. [2022-12-13 15:55:01,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 84.48148148148148) internal successors, (9124), 108 states have internal predecessors, (9124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:01,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 192.0) internal successors, (20928), 109 states have internal predecessors, (20928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:01,993 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 192.0) internal successors, (20928), 109 states have internal predecessors, (20928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:01,993 INFO L175 Difference]: Start difference. First operand has 195 places, 277 transitions, 3129 flow. Second operand 108 states and 9124 transitions. [2022-12-13 15:55:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 1091 transitions, 13549 flow [2022-12-13 15:55:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1091 transitions, 11898 flow, removed 776 selfloop flow, removed 27 redundant places. [2022-12-13 15:55:02,484 INFO L231 Difference]: Finished difference. Result has 274 places, 502 transitions, 6702 flow [2022-12-13 15:55:02,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=6702, PETRI_PLACES=274, PETRI_TRANSITIONS=502} [2022-12-13 15:55:02,484 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2022-12-13 15:55:02,485 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 502 transitions, 6702 flow [2022-12-13 15:55:02,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:02,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:02,485 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:02,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:55:02,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:02,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:55:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1610097227, now seen corresponding path program 6 times [2022-12-13 15:55:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:02,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320822913] [2022-12-13 15:55:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:02,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:03,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320822913] [2022-12-13 15:55:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320822913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000548656] [2022-12-13 15:55:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:55:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:03,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:03,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:55:03,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:55:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:55:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:03,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:04,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000548656] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:04,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:04,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 15:55:04,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589806942] [2022-12-13 15:55:04,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:04,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:55:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:55:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:55:04,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:55:04,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 502 transitions, 6702 flow. Second operand has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:04,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:04,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:55:04,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:09,532 INFO L130 PetriNetUnfolder]: 3535/6510 cut-off events. [2022-12-13 15:55:09,532 INFO L131 PetriNetUnfolder]: For 51267/51566 co-relation queries the response was YES. [2022-12-13 15:55:09,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39115 conditions, 6510 events. 3535/6510 cut-off events. For 51267/51566 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 45704 event pairs, 82 based on Foata normal form. 339/6771 useless extension candidates. Maximal degree in co-relation 39053. Up to 1645 conditions per place. [2022-12-13 15:55:09,566 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 470 selfloop transitions, 355 changer transitions 279/1120 dead transitions. [2022-12-13 15:55:09,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1120 transitions, 16136 flow [2022-12-13 15:55:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 15:55:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-12-13 15:55:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5922 transitions. [2022-12-13 15:55:09,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603544776119403 [2022-12-13 15:55:09,570 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5922 transitions. [2022-12-13 15:55:09,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5922 transitions. [2022-12-13 15:55:09,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:09,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5922 transitions. [2022-12-13 15:55:09,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 88.38805970149254) internal successors, (5922), 67 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:09,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 192.0) internal successors, (13056), 68 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:09,583 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 192.0) internal successors, (13056), 68 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:09,583 INFO L175 Difference]: Start difference. First operand has 274 places, 502 transitions, 6702 flow. Second operand 67 states and 5922 transitions. [2022-12-13 15:55:09,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1120 transitions, 16136 flow [2022-12-13 15:55:09,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1120 transitions, 13411 flow, removed 1299 selfloop flow, removed 25 redundant places. [2022-12-13 15:55:09,980 INFO L231 Difference]: Finished difference. Result has 295 places, 625 transitions, 8268 flow [2022-12-13 15:55:09,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=8268, PETRI_PLACES=295, PETRI_TRANSITIONS=625} [2022-12-13 15:55:09,981 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2022-12-13 15:55:09,982 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 625 transitions, 8268 flow [2022-12-13 15:55:09,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:09,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:09,982 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:09,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:55:10,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:10,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:55:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:10,185 INFO L85 PathProgramCache]: Analyzing trace with hash 786711125, now seen corresponding path program 7 times [2022-12-13 15:55:10,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:10,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629895271] [2022-12-13 15:55:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629895271] [2022-12-13 15:55:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629895271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446815984] [2022-12-13 15:55:10,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:55:10,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:10,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:10,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:10,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:55:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:55:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:10,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:11,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446815984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:11,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:11,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 15:55:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513179798] [2022-12-13 15:55:11,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:11,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:55:11,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:55:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:55:12,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:55:12,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 625 transitions, 8268 flow. Second operand has 24 states, 24 states have (on average 84.20833333333333) internal successors, (2021), 24 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:12,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:12,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:55:12,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:18,188 INFO L130 PetriNetUnfolder]: 4265/7816 cut-off events. [2022-12-13 15:55:18,188 INFO L131 PetriNetUnfolder]: For 60726/61033 co-relation queries the response was YES. [2022-12-13 15:55:18,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46190 conditions, 7816 events. 4265/7816 cut-off events. For 60726/61033 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 56425 event pairs, 74 based on Foata normal form. 379/8101 useless extension candidates. Maximal degree in co-relation 46085. Up to 1856 conditions per place. [2022-12-13 15:55:18,234 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 519 selfloop transitions, 407 changer transitions 392/1334 dead transitions. [2022-12-13 15:55:18,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1334 transitions, 18944 flow [2022-12-13 15:55:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 15:55:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-12-13 15:55:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 6979 transitions. [2022-12-13 15:55:18,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601133966244726 [2022-12-13 15:55:18,239 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 6979 transitions. [2022-12-13 15:55:18,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 6979 transitions. [2022-12-13 15:55:18,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:18,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 6979 transitions. [2022-12-13 15:55:18,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 88.34177215189874) internal successors, (6979), 79 states have internal predecessors, (6979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:18,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 192.0) internal successors, (15360), 80 states have internal predecessors, (15360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:18,254 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 192.0) internal successors, (15360), 80 states have internal predecessors, (15360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:18,254 INFO L175 Difference]: Start difference. First operand has 295 places, 625 transitions, 8268 flow. Second operand 79 states and 6979 transitions. [2022-12-13 15:55:18,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1334 transitions, 18944 flow [2022-12-13 15:55:18,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1334 transitions, 17614 flow, removed 534 selfloop flow, removed 35 redundant places. [2022-12-13 15:55:18,737 INFO L231 Difference]: Finished difference. Result has 338 places, 707 transitions, 10259 flow [2022-12-13 15:55:18,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=10259, PETRI_PLACES=338, PETRI_TRANSITIONS=707} [2022-12-13 15:55:18,739 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2022-12-13 15:55:18,739 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 707 transitions, 10259 flow [2022-12-13 15:55:18,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.20833333333333) internal successors, (2021), 24 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:18,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:18,739 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:18,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:55:18,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:18,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:55:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash 119377078, now seen corresponding path program 8 times [2022-12-13 15:55:18,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:18,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004848174] [2022-12-13 15:55:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:18,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:19,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:19,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004848174] [2022-12-13 15:55:19,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004848174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:19,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271488784] [2022-12-13 15:55:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:55:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:19,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:55:19,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:55:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:55:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:19,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:20,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271488784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:20,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:20,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 15:55:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208650666] [2022-12-13 15:55:20,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:55:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:55:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:55:20,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 192 [2022-12-13 15:55:20,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 707 transitions, 10259 flow. Second operand has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:20,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:20,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 192 [2022-12-13 15:55:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:28,159 INFO L130 PetriNetUnfolder]: 6596/10913 cut-off events. [2022-12-13 15:55:28,160 INFO L131 PetriNetUnfolder]: For 105708/105708 co-relation queries the response was YES. [2022-12-13 15:55:28,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64803 conditions, 10913 events. 6596/10913 cut-off events. For 105708/105708 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 70293 event pairs, 285 based on Foata normal form. 196/11109 useless extension candidates. Maximal degree in co-relation 64688. Up to 3732 conditions per place. [2022-12-13 15:55:28,228 INFO L137 encePairwiseOnDemand]: 183/192 looper letters, 756 selfloop transitions, 358 changer transitions 259/1373 dead transitions. [2022-12-13 15:55:28,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1373 transitions, 20875 flow [2022-12-13 15:55:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 15:55:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-12-13 15:55:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 7739 transitions. [2022-12-13 15:55:28,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44785879629629627 [2022-12-13 15:55:28,234 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 7739 transitions. [2022-12-13 15:55:28,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 7739 transitions. [2022-12-13 15:55:28,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:28,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 7739 transitions. [2022-12-13 15:55:28,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 85.9888888888889) internal successors, (7739), 90 states have internal predecessors, (7739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:28,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 192.0) internal successors, (17472), 91 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:28,250 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 192.0) internal successors, (17472), 91 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:28,250 INFO L175 Difference]: Start difference. First operand has 338 places, 707 transitions, 10259 flow. Second operand 90 states and 7739 transitions. [2022-12-13 15:55:28,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1373 transitions, 20875 flow [2022-12-13 15:55:29,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1373 transitions, 18732 flow, removed 732 selfloop flow, removed 38 redundant places. [2022-12-13 15:55:29,138 INFO L231 Difference]: Finished difference. Result has 396 places, 791 transitions, 11850 flow [2022-12-13 15:55:29,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=8982, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=11850, PETRI_PLACES=396, PETRI_TRANSITIONS=791} [2022-12-13 15:55:29,138 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2022-12-13 15:55:29,138 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 791 transitions, 11850 flow [2022-12-13 15:55:29,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:29,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:29,139 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:29,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 15:55:29,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:55:29,340 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:55:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:29,340 INFO L85 PathProgramCache]: Analyzing trace with hash -867335893, now seen corresponding path program 9 times [2022-12-13 15:55:29,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:29,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191112627] [2022-12-13 15:55:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:29,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:29,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191112627] [2022-12-13 15:55:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191112627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679897141] [2022-12-13 15:55:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:55:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:29,615 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:29,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:55:29,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 15:55:29,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:29,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:55:29,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:30,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:31,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679897141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:31,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:31,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 15:55:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599946562] [2022-12-13 15:55:31,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:31,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:55:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:55:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:55:31,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 192 [2022-12-13 15:55:31,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 791 transitions, 11850 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:31,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:31,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 192 [2022-12-13 15:55:31,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:37,727 INFO L130 PetriNetUnfolder]: 7534/12443 cut-off events. [2022-12-13 15:55:37,728 INFO L131 PetriNetUnfolder]: For 241372/241372 co-relation queries the response was YES. [2022-12-13 15:55:37,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83470 conditions, 12443 events. 7534/12443 cut-off events. For 241372/241372 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 81765 event pairs, 359 based on Foata normal form. 238/12681 useless extension candidates. Maximal degree in co-relation 83008. Up to 3754 conditions per place. [2022-12-13 15:55:37,827 INFO L137 encePairwiseOnDemand]: 183/192 looper letters, 788 selfloop transitions, 443 changer transitions 286/1517 dead transitions. [2022-12-13 15:55:37,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1517 transitions, 25591 flow [2022-12-13 15:55:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 15:55:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-12-13 15:55:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 7663 transitions. [2022-12-13 15:55:37,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4484433520599251 [2022-12-13 15:55:37,834 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 7663 transitions. [2022-12-13 15:55:37,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 7663 transitions. [2022-12-13 15:55:37,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:37,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 7663 transitions. [2022-12-13 15:55:37,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 86.10112359550561) internal successors, (7663), 89 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:37,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 192.0) internal successors, (17280), 90 states have internal predecessors, (17280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:37,859 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 192.0) internal successors, (17280), 90 states have internal predecessors, (17280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:37,859 INFO L175 Difference]: Start difference. First operand has 396 places, 791 transitions, 11850 flow. Second operand 89 states and 7663 transitions. [2022-12-13 15:55:37,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1517 transitions, 25591 flow [2022-12-13 15:55:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1517 transitions, 21463 flow, removed 1992 selfloop flow, removed 61 redundant places. [2022-12-13 15:55:39,642 INFO L231 Difference]: Finished difference. Result has 426 places, 901 transitions, 14311 flow [2022-12-13 15:55:39,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=10785, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=14311, PETRI_PLACES=426, PETRI_TRANSITIONS=901} [2022-12-13 15:55:39,643 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2022-12-13 15:55:39,643 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 901 transitions, 14311 flow [2022-12-13 15:55:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:39,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:39,643 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:39,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:55:39,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:55:39,845 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:55:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1540796846, now seen corresponding path program 2 times [2022-12-13 15:55:39,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:39,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625938888] [2022-12-13 15:55:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:39,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:40,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625938888] [2022-12-13 15:55:40,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625938888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516459935] [2022-12-13 15:55:40,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:55:40,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:40,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:40,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:55:40,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:55:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:55:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:40,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516459935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:41,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:41,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 15:55:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492786084] [2022-12-13 15:55:41,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:55:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:55:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:55:41,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 192 [2022-12-13 15:55:41,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 901 transitions, 14311 flow. Second operand has 24 states, 24 states have (on average 83.83333333333333) internal successors, (2012), 24 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:41,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:41,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 192 [2022-12-13 15:55:41,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:48,172 INFO L130 PetriNetUnfolder]: 7853/12976 cut-off events. [2022-12-13 15:55:48,172 INFO L131 PetriNetUnfolder]: For 261150/261150 co-relation queries the response was YES. [2022-12-13 15:55:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88800 conditions, 12976 events. 7853/12976 cut-off events. For 261150/261150 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 85794 event pairs, 799 based on Foata normal form. 190/13166 useless extension candidates. Maximal degree in co-relation 88262. Up to 6038 conditions per place. [2022-12-13 15:55:48,273 INFO L137 encePairwiseOnDemand]: 182/192 looper letters, 857 selfloop transitions, 297 changer transitions 276/1430 dead transitions. [2022-12-13 15:55:48,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1430 transitions, 25895 flow [2022-12-13 15:55:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 15:55:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-13 15:55:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6580 transitions. [2022-12-13 15:55:48,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45694444444444443 [2022-12-13 15:55:48,278 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6580 transitions. [2022-12-13 15:55:48,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6580 transitions. [2022-12-13 15:55:48,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:48,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6580 transitions. [2022-12-13 15:55:48,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 87.73333333333333) internal successors, (6580), 75 states have internal predecessors, (6580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:48,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 192.0) internal successors, (14592), 76 states have internal predecessors, (14592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:48,292 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 192.0) internal successors, (14592), 76 states have internal predecessors, (14592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:48,292 INFO L175 Difference]: Start difference. First operand has 426 places, 901 transitions, 14311 flow. Second operand 75 states and 6580 transitions. [2022-12-13 15:55:48,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1430 transitions, 25895 flow [2022-12-13 15:55:50,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1430 transitions, 23062 flow, removed 1369 selfloop flow, removed 57 redundant places. [2022-12-13 15:55:50,358 INFO L231 Difference]: Finished difference. Result has 447 places, 949 transitions, 15477 flow [2022-12-13 15:55:50,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=13429, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=15477, PETRI_PLACES=447, PETRI_TRANSITIONS=949} [2022-12-13 15:55:50,359 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 417 predicate places. [2022-12-13 15:55:50,359 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 949 transitions, 15477 flow [2022-12-13 15:55:50,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.83333333333333) internal successors, (2012), 24 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:50,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:50,359 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:50,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:55:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:55:50,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:55:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash 843822389, now seen corresponding path program 10 times [2022-12-13 15:55:50,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:50,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937712320] [2022-12-13 15:55:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:50,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:50,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937712320] [2022-12-13 15:55:50,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937712320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:55:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669396670] [2022-12-13 15:55:50,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:55:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:55:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:55:50,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:55:50,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:55:51,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:55:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:55:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:55:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:55:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:51,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:55:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:55:52,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669396670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:55:52,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:55:52,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-13 15:55:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720756790] [2022-12-13 15:55:52,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:55:52,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:55:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:52,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:55:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:55:52,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:55:52,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 949 transitions, 15477 flow. Second operand has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:52,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:52,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:55:52,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:00,316 INFO L130 PetriNetUnfolder]: 6351/11852 cut-off events. [2022-12-13 15:56:00,316 INFO L131 PetriNetUnfolder]: For 318133/319023 co-relation queries the response was YES. [2022-12-13 15:56:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92487 conditions, 11852 events. 6351/11852 cut-off events. For 318133/319023 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 93425 event pairs, 240 based on Foata normal form. 630/12388 useless extension candidates. Maximal degree in co-relation 92338. Up to 2858 conditions per place. [2022-12-13 15:56:00,438 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 807 selfloop transitions, 666 changer transitions 272/1778 dead transitions. [2022-12-13 15:56:00,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1778 transitions, 32891 flow [2022-12-13 15:56:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-13 15:56:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-12-13 15:56:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7524 transitions. [2022-12-13 15:56:00,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4610294117647059 [2022-12-13 15:56:00,448 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7524 transitions. [2022-12-13 15:56:00,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7524 transitions. [2022-12-13 15:56:00,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:00,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7524 transitions. [2022-12-13 15:56:00,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 88.51764705882353) internal successors, (7524), 85 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:00,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 192.0) internal successors, (16512), 86 states have internal predecessors, (16512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:00,478 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 192.0) internal successors, (16512), 86 states have internal predecessors, (16512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:00,479 INFO L175 Difference]: Start difference. First operand has 447 places, 949 transitions, 15477 flow. Second operand 85 states and 7524 transitions. [2022-12-13 15:56:00,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1778 transitions, 32891 flow [2022-12-13 15:56:02,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1778 transitions, 27850 flow, removed 2123 selfloop flow, removed 57 redundant places. [2022-12-13 15:56:02,848 INFO L231 Difference]: Finished difference. Result has 457 places, 1211 transitions, 21078 flow [2022-12-13 15:56:02,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=14111, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=21078, PETRI_PLACES=457, PETRI_TRANSITIONS=1211} [2022-12-13 15:56:02,849 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2022-12-13 15:56:02,849 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1211 transitions, 21078 flow [2022-12-13 15:56:02,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:02,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:02,850 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:02,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:56:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:03,051 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:56:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -432983550, now seen corresponding path program 11 times [2022-12-13 15:56:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9537845] [2022-12-13 15:56:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:03,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9537845] [2022-12-13 15:56:03,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9537845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:56:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080737721] [2022-12-13 15:56:03,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:56:03,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:03,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:03,466 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:56:03,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:56:03,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 15:56:03,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:56:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:56:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:56:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:04,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:56:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:05,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080737721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:56:05,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:56:05,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-13 15:56:05,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395322306] [2022-12-13 15:56:05,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:56:05,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:56:05,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:56:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:56:05,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:56:05,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1211 transitions, 21078 flow. Second operand has 26 states, 26 states have (on average 84.15384615384616) internal successors, (2188), 26 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:05,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:05,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:56:05,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:13,615 INFO L130 PetriNetUnfolder]: 7139/13170 cut-off events. [2022-12-13 15:56:13,615 INFO L131 PetriNetUnfolder]: For 206594/207210 co-relation queries the response was YES. [2022-12-13 15:56:13,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93731 conditions, 13170 events. 7139/13170 cut-off events. For 206594/207210 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 105264 event pairs, 320 based on Foata normal form. 662/13690 useless extension candidates. Maximal degree in co-relation 93495. Up to 3552 conditions per place. [2022-12-13 15:56:13,715 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 933 selfloop transitions, 539 changer transitions 338/1842 dead transitions. [2022-12-13 15:56:13,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1842 transitions, 34296 flow [2022-12-13 15:56:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 15:56:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-12-13 15:56:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 6170 transitions. [2022-12-13 15:56:13,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45907738095238093 [2022-12-13 15:56:13,721 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 6170 transitions. [2022-12-13 15:56:13,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 6170 transitions. [2022-12-13 15:56:13,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:13,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 6170 transitions. [2022-12-13 15:56:13,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 88.14285714285714) internal successors, (6170), 70 states have internal predecessors, (6170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:13,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 192.0) internal successors, (13632), 71 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:13,736 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 192.0) internal successors, (13632), 71 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:13,736 INFO L175 Difference]: Start difference. First operand has 457 places, 1211 transitions, 21078 flow. Second operand 70 states and 6170 transitions. [2022-12-13 15:56:13,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1842 transitions, 34296 flow [2022-12-13 15:56:15,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1842 transitions, 32324 flow, removed 903 selfloop flow, removed 37 redundant places. [2022-12-13 15:56:15,722 INFO L231 Difference]: Finished difference. Result has 492 places, 1331 transitions, 23854 flow [2022-12-13 15:56:15,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=19568, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=23854, PETRI_PLACES=492, PETRI_TRANSITIONS=1331} [2022-12-13 15:56:15,723 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 462 predicate places. [2022-12-13 15:56:15,723 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1331 transitions, 23854 flow [2022-12-13 15:56:15,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.15384615384616) internal successors, (2188), 26 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:15,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:15,723 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:15,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:56:15,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:56:15,924 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:56:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash 989289821, now seen corresponding path program 12 times [2022-12-13 15:56:15,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:15,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235918322] [2022-12-13 15:56:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:15,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:16,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235918322] [2022-12-13 15:56:16,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235918322] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:56:16,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408217809] [2022-12-13 15:56:16,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:56:16,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:16,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:56:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:56:16,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 15:56:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:56:16,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:56:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:56:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:16,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:56:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:18,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408217809] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:56:18,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:56:18,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-13 15:56:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135418393] [2022-12-13 15:56:18,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:56:18,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:56:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:56:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:56:18,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:56:18,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1331 transitions, 23854 flow. Second operand has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:18,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:18,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:56:18,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:28,751 INFO L130 PetriNetUnfolder]: 8656/15998 cut-off events. [2022-12-13 15:56:28,751 INFO L131 PetriNetUnfolder]: For 309724/310164 co-relation queries the response was YES. [2022-12-13 15:56:28,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120897 conditions, 15998 events. 8656/15998 cut-off events. For 309724/310164 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 129248 event pairs, 250 based on Foata normal form. 600/16479 useless extension candidates. Maximal degree in co-relation 120634. Up to 3861 conditions per place. [2022-12-13 15:56:28,916 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 1101 selfloop transitions, 659 changer transitions 292/2140 dead transitions. [2022-12-13 15:56:28,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 2140 transitions, 41669 flow [2022-12-13 15:56:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 15:56:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-12-13 15:56:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 6881 transitions. [2022-12-13 15:56:28,920 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4654356060606061 [2022-12-13 15:56:28,920 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 6881 transitions. [2022-12-13 15:56:28,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 6881 transitions. [2022-12-13 15:56:28,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:28,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 6881 transitions. [2022-12-13 15:56:28,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 89.36363636363636) internal successors, (6881), 77 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:28,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 192.0) internal successors, (14976), 78 states have internal predecessors, (14976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:28,931 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 192.0) internal successors, (14976), 78 states have internal predecessors, (14976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:28,932 INFO L175 Difference]: Start difference. First operand has 492 places, 1331 transitions, 23854 flow. Second operand 77 states and 6881 transitions. [2022-12-13 15:56:28,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 2140 transitions, 41669 flow [2022-12-13 15:56:33,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 2140 transitions, 38908 flow, removed 1351 selfloop flow, removed 30 redundant places. [2022-12-13 15:56:33,684 INFO L231 Difference]: Finished difference. Result has 533 places, 1572 transitions, 30676 flow [2022-12-13 15:56:33,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=23053, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=30676, PETRI_PLACES=533, PETRI_TRANSITIONS=1572} [2022-12-13 15:56:33,685 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 503 predicate places. [2022-12-13 15:56:33,685 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1572 transitions, 30676 flow [2022-12-13 15:56:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:33,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:33,686 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:33,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:56:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:33,887 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:56:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash -225025097, now seen corresponding path program 3 times [2022-12-13 15:56:33,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:33,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638160248] [2022-12-13 15:56:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:34,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638160248] [2022-12-13 15:56:34,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638160248] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:56:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340817337] [2022-12-13 15:56:34,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:56:34,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:34,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:34,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:56:34,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:56:34,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 15:56:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:56:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:56:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:56:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:35,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:56:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:36,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340817337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:56:36,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:56:36,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 15:56:36,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288401203] [2022-12-13 15:56:36,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:56:36,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:56:36,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:56:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-12-13 15:56:36,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 192 [2022-12-13 15:56:36,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1572 transitions, 30676 flow. Second operand has 30 states, 30 states have (on average 83.53333333333333) internal successors, (2506), 30 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:36,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:36,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 192 [2022-12-13 15:56:36,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:49,733 INFO L130 PetriNetUnfolder]: 13763/23024 cut-off events. [2022-12-13 15:56:49,733 INFO L131 PetriNetUnfolder]: For 414033/414033 co-relation queries the response was YES. [2022-12-13 15:56:49,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167441 conditions, 23024 events. 13763/23024 cut-off events. For 414033/414033 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 169361 event pairs, 1719 based on Foata normal form. 260/23284 useless extension candidates. Maximal degree in co-relation 167204. Up to 9936 conditions per place. [2022-12-13 15:56:50,081 INFO L137 encePairwiseOnDemand]: 182/192 looper letters, 1426 selfloop transitions, 636 changer transitions 390/2452 dead transitions. [2022-12-13 15:56:50,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 2452 transitions, 49675 flow [2022-12-13 15:56:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-12-13 15:56:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-12-13 15:56:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 9242 transitions. [2022-12-13 15:56:50,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45843253968253966 [2022-12-13 15:56:50,089 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 9242 transitions. [2022-12-13 15:56:50,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 9242 transitions. [2022-12-13 15:56:50,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:50,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 9242 transitions. [2022-12-13 15:56:50,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 88.01904761904763) internal successors, (9242), 105 states have internal predecessors, (9242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:50,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 192.0) internal successors, (20352), 106 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:50,111 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 192.0) internal successors, (20352), 106 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:50,111 INFO L175 Difference]: Start difference. First operand has 533 places, 1572 transitions, 30676 flow. Second operand 105 states and 9242 transitions. [2022-12-13 15:56:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 2452 transitions, 49675 flow [2022-12-13 15:56:56,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 2452 transitions, 47264 flow, removed 1156 selfloop flow, removed 30 redundant places. [2022-12-13 15:56:56,153 INFO L231 Difference]: Finished difference. Result has 653 places, 1757 transitions, 34990 flow [2022-12-13 15:56:56,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=28962, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=34990, PETRI_PLACES=653, PETRI_TRANSITIONS=1757} [2022-12-13 15:56:56,154 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 623 predicate places. [2022-12-13 15:56:56,154 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 1757 transitions, 34990 flow [2022-12-13 15:56:56,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.53333333333333) internal successors, (2506), 30 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:56,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:56,154 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:56,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:56:56,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:56,356 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:56:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1481820886, now seen corresponding path program 13 times [2022-12-13 15:56:56,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:56,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369849860] [2022-12-13 15:56:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:56,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:57,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369849860] [2022-12-13 15:56:57,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369849860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:56:57,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073762275] [2022-12-13 15:56:57,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:56:57,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:56:57,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:57,097 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:56:57,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:56:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:56:57,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:56:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:57,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:56:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:56:59,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073762275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:56:59,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:56:59,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 15:56:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278042237] [2022-12-13 15:56:59,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:56:59,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:56:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:56:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-12-13 15:56:59,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:56:59,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1757 transitions, 34990 flow. Second operand has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:59,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:59,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:56:59,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:22,051 INFO L130 PetriNetUnfolder]: 11087/20549 cut-off events. [2022-12-13 15:57:22,051 INFO L131 PetriNetUnfolder]: For 971671/973892 co-relation queries the response was YES. [2022-12-13 15:57:22,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196207 conditions, 20549 events. 11087/20549 cut-off events. For 971671/973892 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 175607 event pairs, 534 based on Foata normal form. 1123/21378 useless extension candidates. Maximal degree in co-relation 195919. Up to 4850 conditions per place. [2022-12-13 15:57:22,364 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 1378 selfloop transitions, 953 changer transitions 700/3074 dead transitions. [2022-12-13 15:57:22,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 3074 transitions, 67257 flow [2022-12-13 15:57:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-12-13 15:57:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2022-12-13 15:57:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 12086 transitions. [2022-12-13 15:57:22,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4594738442822384 [2022-12-13 15:57:22,371 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 12086 transitions. [2022-12-13 15:57:22,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 12086 transitions. [2022-12-13 15:57:22,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:22,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 12086 transitions. [2022-12-13 15:57:22,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 88.21897810218978) internal successors, (12086), 137 states have internal predecessors, (12086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:22,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 192.0) internal successors, (26496), 138 states have internal predecessors, (26496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:22,393 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 192.0) internal successors, (26496), 138 states have internal predecessors, (26496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:22,393 INFO L175 Difference]: Start difference. First operand has 653 places, 1757 transitions, 34990 flow. Second operand 137 states and 12086 transitions. [2022-12-13 15:57:22,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 3074 transitions, 67257 flow [2022-12-13 15:57:36,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 3074 transitions, 61500 flow, removed 2854 selfloop flow, removed 65 redundant places. [2022-12-13 15:57:36,331 INFO L231 Difference]: Finished difference. Result has 713 places, 1983 transitions, 42639 flow [2022-12-13 15:57:36,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=33319, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1016, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=42639, PETRI_PLACES=713, PETRI_TRANSITIONS=1983} [2022-12-13 15:57:36,333 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 683 predicate places. [2022-12-13 15:57:36,333 INFO L495 AbstractCegarLoop]: Abstraction has has 713 places, 1983 transitions, 42639 flow [2022-12-13 15:57:36,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:36,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:36,334 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:36,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:57:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 15:57:36,535 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:57:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -69157505, now seen corresponding path program 14 times [2022-12-13 15:57:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:36,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929693] [2022-12-13 15:57:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:36,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:57:37,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:37,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929693] [2022-12-13 15:57:37,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929693] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:57:37,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224410021] [2022-12-13 15:57:37,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:57:37,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:57:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:57:37,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:57:37,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:57:37,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:57:37,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:57:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:57:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:57:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:57:37,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:57:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:57:39,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224410021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:57:39,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:57:39,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 15:57:39,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896604783] [2022-12-13 15:57:39,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:57:39,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:57:39,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:57:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-12-13 15:57:39,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:57:39,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1983 transitions, 42639 flow. Second operand has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:39,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:39,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:57:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:59,951 INFO L130 PetriNetUnfolder]: 12308/22917 cut-off events. [2022-12-13 15:57:59,951 INFO L131 PetriNetUnfolder]: For 938758/940035 co-relation queries the response was YES. [2022-12-13 15:58:00,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208350 conditions, 22917 events. 12308/22917 cut-off events. For 938758/940035 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 199752 event pairs, 434 based on Foata normal form. 1163/23786 useless extension candidates. Maximal degree in co-relation 208150. Up to 5444 conditions per place. [2022-12-13 15:58:00,324 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 1481 selfloop transitions, 1090 changer transitions 653/3267 dead transitions. [2022-12-13 15:58:00,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 3267 transitions, 75005 flow [2022-12-13 15:58:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-12-13 15:58:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2022-12-13 15:58:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 11314 transitions. [2022-12-13 15:58:00,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603678385416667 [2022-12-13 15:58:00,331 INFO L72 ComplementDD]: Start complementDD. Operand 128 states and 11314 transitions. [2022-12-13 15:58:00,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 11314 transitions. [2022-12-13 15:58:00,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:00,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 128 states and 11314 transitions. [2022-12-13 15:58:00,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 129 states, 128 states have (on average 88.390625) internal successors, (11314), 128 states have internal predecessors, (11314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:00,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 129 states, 129 states have (on average 192.0) internal successors, (24768), 129 states have internal predecessors, (24768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:00,352 INFO L81 ComplementDD]: Finished complementDD. Result has 129 states, 129 states have (on average 192.0) internal successors, (24768), 129 states have internal predecessors, (24768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:00,352 INFO L175 Difference]: Start difference. First operand has 713 places, 1983 transitions, 42639 flow. Second operand 128 states and 11314 transitions. [2022-12-13 15:58:00,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 3267 transitions, 75005 flow [2022-12-13 15:58:17,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 3267 transitions, 69958 flow, removed 2360 selfloop flow, removed 72 redundant places. [2022-12-13 15:58:17,469 INFO L231 Difference]: Finished difference. Result has 749 places, 2232 transitions, 50317 flow [2022-12-13 15:58:17,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=39469, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=779, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=128, PETRI_FLOW=50317, PETRI_PLACES=749, PETRI_TRANSITIONS=2232} [2022-12-13 15:58:17,470 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 719 predicate places. [2022-12-13 15:58:17,470 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 2232 transitions, 50317 flow [2022-12-13 15:58:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:17,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:17,471 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:58:17,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:58:17,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:58:17,672 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:58:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2091407132, now seen corresponding path program 15 times [2022-12-13 15:58:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:17,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032052289] [2022-12-13 15:58:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:17,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:58:18,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032052289] [2022-12-13 15:58:18,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032052289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:58:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186728217] [2022-12-13 15:58:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:58:18,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:58:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:58:18,138 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:58:18,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:58:18,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 15:58:18,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:58:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:58:18,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:58:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:58:18,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:58:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:58:20,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186728217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:58:20,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:58:20,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 15:58:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943188382] [2022-12-13 15:58:20,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:58:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:58:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:58:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-12-13 15:58:20,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:58:20,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 2232 transitions, 50317 flow. Second operand has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:20,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:20,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:58:20,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:40,990 INFO L130 PetriNetUnfolder]: 13752/25467 cut-off events. [2022-12-13 15:58:40,991 INFO L131 PetriNetUnfolder]: For 1013961/1015278 co-relation queries the response was YES. [2022-12-13 15:58:41,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236009 conditions, 25467 events. 13752/25467 cut-off events. For 1013961/1015278 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 223788 event pairs, 408 based on Foata normal form. 1299/26410 useless extension candidates. Maximal degree in co-relation 235798. Up to 6056 conditions per place. [2022-12-13 15:58:41,393 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 1531 selfloop transitions, 1126 changer transitions 823/3522 dead transitions. [2022-12-13 15:58:41,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 3522 transitions, 85886 flow [2022-12-13 15:58:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-13 15:58:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2022-12-13 15:58:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 9087 transitions. [2022-12-13 15:58:41,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45949635922330095 [2022-12-13 15:58:41,399 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 9087 transitions. [2022-12-13 15:58:41,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 9087 transitions. [2022-12-13 15:58:41,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:41,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 9087 transitions. [2022-12-13 15:58:41,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 88.22330097087378) internal successors, (9087), 103 states have internal predecessors, (9087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:41,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 192.0) internal successors, (19968), 104 states have internal predecessors, (19968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:41,416 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 192.0) internal successors, (19968), 104 states have internal predecessors, (19968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:41,416 INFO L175 Difference]: Start difference. First operand has 749 places, 2232 transitions, 50317 flow. Second operand 103 states and 9087 transitions. [2022-12-13 15:58:41,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 3522 transitions, 85886 flow [2022-12-13 15:58:58,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 3522 transitions, 80675 flow, removed 2493 selfloop flow, removed 58 redundant places. [2022-12-13 15:58:58,701 INFO L231 Difference]: Finished difference. Result has 783 places, 2412 transitions, 56440 flow [2022-12-13 15:58:58,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=47058, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=56440, PETRI_PLACES=783, PETRI_TRANSITIONS=2412} [2022-12-13 15:58:58,703 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 753 predicate places. [2022-12-13 15:58:58,703 INFO L495 AbstractCegarLoop]: Abstraction has has 783 places, 2412 transitions, 56440 flow [2022-12-13 15:58:58,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:58,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:58,703 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:58:58,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:58:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 15:58:58,904 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:58:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -746581949, now seen corresponding path program 16 times [2022-12-13 15:58:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:58,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665367631] [2022-12-13 15:58:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:58:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:59,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665367631] [2022-12-13 15:58:59,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665367631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:58:59,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344309135] [2022-12-13 15:58:59,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:58:59,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:58:59,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:58:59,525 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:58:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:58:59,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:58:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:58:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:58:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:59:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:59:00,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:59:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:59:02,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344309135] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:59:02,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:59:02,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-12-13 15:59:02,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493813596] [2022-12-13 15:59:02,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:59:02,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 15:59:02,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:59:02,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 15:59:02,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:59:02,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:59:02,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 2412 transitions, 56440 flow. Second operand has 31 states, 31 states have (on average 84.35483870967742) internal successors, (2615), 31 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:02,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:59:02,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:59:02,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:59:24,333 INFO L130 PetriNetUnfolder]: 14031/25997 cut-off events. [2022-12-13 15:59:24,333 INFO L131 PetriNetUnfolder]: For 882752/884070 co-relation queries the response was YES. [2022-12-13 15:59:24,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239059 conditions, 25997 events. 14031/25997 cut-off events. For 882752/884070 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 229192 event pairs, 676 based on Foata normal form. 1244/26909 useless extension candidates. Maximal degree in co-relation 238859. Up to 6970 conditions per place. [2022-12-13 15:59:24,825 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 1695 selfloop transitions, 1101 changer transitions 655/3490 dead transitions. [2022-12-13 15:59:24,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 3490 transitions, 85661 flow [2022-12-13 15:59:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-13 15:59:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-12-13 15:59:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9369 transitions. [2022-12-13 15:59:24,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603478773584906 [2022-12-13 15:59:24,831 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9369 transitions. [2022-12-13 15:59:24,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9369 transitions. [2022-12-13 15:59:24,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:59:24,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9369 transitions. [2022-12-13 15:59:24,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 88.38679245283019) internal successors, (9369), 106 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:25,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 192.0) internal successors, (20544), 107 states have internal predecessors, (20544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:25,026 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 192.0) internal successors, (20544), 107 states have internal predecessors, (20544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:25,026 INFO L175 Difference]: Start difference. First operand has 783 places, 2412 transitions, 56440 flow. Second operand 106 states and 9369 transitions. [2022-12-13 15:59:25,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 3490 transitions, 85661 flow [2022-12-13 15:59:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 3490 transitions, 82709 flow, removed 1355 selfloop flow, removed 67 redundant places. [2022-12-13 15:59:39,400 INFO L231 Difference]: Finished difference. Result has 805 places, 2536 transitions, 62517 flow [2022-12-13 15:59:39,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=54017, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=62517, PETRI_PLACES=805, PETRI_TRANSITIONS=2536} [2022-12-13 15:59:39,402 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 775 predicate places. [2022-12-13 15:59:39,402 INFO L495 AbstractCegarLoop]: Abstraction has has 805 places, 2536 transitions, 62517 flow [2022-12-13 15:59:39,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.35483870967742) internal successors, (2615), 31 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:39,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:59:39,403 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:59:39,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:59:39,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 15:59:39,604 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 15:59:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:59:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1115165026, now seen corresponding path program 17 times [2022-12-13 15:59:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:59:39,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270696405] [2022-12-13 15:59:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:59:39,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:59:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:59:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:59:40,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:59:40,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270696405] [2022-12-13 15:59:40,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270696405] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:59:40,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743135662] [2022-12-13 15:59:40,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:59:40,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:59:40,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:59:40,198 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:59:40,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:59:40,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 15:59:40,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:59:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:59:40,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:59:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:59:40,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:59:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:59:43,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743135662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:59:43,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:59:43,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-12-13 15:59:43,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502240435] [2022-12-13 15:59:43,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:59:43,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 15:59:43,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:59:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 15:59:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:59:43,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 15:59:43,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 2536 transitions, 62517 flow. Second operand has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:43,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:59:43,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 15:59:43,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:00:07,302 INFO L130 PetriNetUnfolder]: 14761/27466 cut-off events. [2022-12-13 16:00:07,302 INFO L131 PetriNetUnfolder]: For 947791/948678 co-relation queries the response was YES. [2022-12-13 16:00:07,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258247 conditions, 27466 events. 14761/27466 cut-off events. For 947791/948678 co-relation queries the response was YES. Maximal size of possible extension queue 1343. Compared 246097 event pairs, 874 based on Foata normal form. 1005/28111 useless extension candidates. Maximal degree in co-relation 258041. Up to 8513 conditions per place. [2022-12-13 16:00:07,750 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 1937 selfloop transitions, 1070 changer transitions 522/3566 dead transitions. [2022-12-13 16:00:07,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 3566 transitions, 93256 flow [2022-12-13 16:00:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-13 16:00:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-12-13 16:00:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 9790 transitions. [2022-12-13 16:00:07,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4593656156156156 [2022-12-13 16:00:07,756 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 9790 transitions. [2022-12-13 16:00:07,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 9790 transitions. [2022-12-13 16:00:07,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:00:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 9790 transitions. [2022-12-13 16:00:07,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 88.1981981981982) internal successors, (9790), 111 states have internal predecessors, (9790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:07,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 192.0) internal successors, (21504), 112 states have internal predecessors, (21504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:07,773 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 192.0) internal successors, (21504), 112 states have internal predecessors, (21504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:07,773 INFO L175 Difference]: Start difference. First operand has 805 places, 2536 transitions, 62517 flow. Second operand 111 states and 9790 transitions. [2022-12-13 16:00:07,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 3566 transitions, 93256 flow [2022-12-13 16:00:22,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 3566 transitions, 89867 flow, removed 1546 selfloop flow, removed 55 redundant places. [2022-12-13 16:00:22,336 INFO L231 Difference]: Finished difference. Result has 847 places, 2757 transitions, 70484 flow [2022-12-13 16:00:22,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=59654, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=70484, PETRI_PLACES=847, PETRI_TRANSITIONS=2757} [2022-12-13 16:00:22,338 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 817 predicate places. [2022-12-13 16:00:22,338 INFO L495 AbstractCegarLoop]: Abstraction has has 847 places, 2757 transitions, 70484 flow [2022-12-13 16:00:22,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:22,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:00:22,338 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:00:22,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 16:00:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:00:22,540 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:00:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:00:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1039686181, now seen corresponding path program 18 times [2022-12-13 16:00:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:00:22,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035955531] [2022-12-13 16:00:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:00:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:00:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:00:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:00:23,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:00:23,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035955531] [2022-12-13 16:00:23,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035955531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:00:23,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724057790] [2022-12-13 16:00:23,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:00:23,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:00:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:00:23,127 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:00:23,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 16:00:23,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 16:00:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:00:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:00:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:00:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:00:23,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:00:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:00:25,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724057790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:00:25,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:00:25,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-12-13 16:00:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102521224] [2022-12-13 16:00:25,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:00:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 16:00:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:00:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 16:00:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-12-13 16:00:26,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 192 [2022-12-13 16:00:26,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 847 places, 2757 transitions, 70484 flow. Second operand has 29 states, 29 states have (on average 81.62068965517241) internal successors, (2367), 29 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:26,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:00:26,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 192 [2022-12-13 16:00:26,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:00:59,677 INFO L130 PetriNetUnfolder]: 24333/40422 cut-off events. [2022-12-13 16:00:59,677 INFO L131 PetriNetUnfolder]: For 1402893/1402893 co-relation queries the response was YES. [2022-12-13 16:01:00,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356652 conditions, 40422 events. 24333/40422 cut-off events. For 1402893/1402893 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 321362 event pairs, 1865 based on Foata normal form. 430/40852 useless extension candidates. Maximal degree in co-relation 356336. Up to 15906 conditions per place. [2022-12-13 16:01:00,424 INFO L137 encePairwiseOnDemand]: 183/192 looper letters, 2069 selfloop transitions, 1300 changer transitions 514/3883 dead transitions. [2022-12-13 16:01:00,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 3883 transitions, 104321 flow [2022-12-13 16:01:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-12-13 16:01:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2022-12-13 16:01:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 11477 transitions. [2022-12-13 16:01:00,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4460898631840796 [2022-12-13 16:01:00,432 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 11477 transitions. [2022-12-13 16:01:00,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 11477 transitions. [2022-12-13 16:01:00,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:01:00,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 11477 transitions. [2022-12-13 16:01:00,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 85.64925373134328) internal successors, (11477), 134 states have internal predecessors, (11477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:00,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 192.0) internal successors, (25920), 135 states have internal predecessors, (25920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:00,455 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 192.0) internal successors, (25920), 135 states have internal predecessors, (25920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:00,455 INFO L175 Difference]: Start difference. First operand has 847 places, 2757 transitions, 70484 flow. Second operand 134 states and 11477 transitions. [2022-12-13 16:01:00,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 3883 transitions, 104321 flow [2022-12-13 16:01:39,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 3883 transitions, 99966 flow, removed 2109 selfloop flow, removed 48 redundant places. [2022-12-13 16:01:39,469 INFO L231 Difference]: Finished difference. Result has 967 places, 2992 transitions, 80330 flow [2022-12-13 16:01:39,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=67107, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=80330, PETRI_PLACES=967, PETRI_TRANSITIONS=2992} [2022-12-13 16:01:39,470 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 937 predicate places. [2022-12-13 16:01:39,471 INFO L495 AbstractCegarLoop]: Abstraction has has 967 places, 2992 transitions, 80330 flow [2022-12-13 16:01:39,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 81.62068965517241) internal successors, (2367), 29 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:39,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:01:39,471 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:39,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 16:01:39,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:39,672 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:01:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash 475641081, now seen corresponding path program 19 times [2022-12-13 16:01:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789091493] [2022-12-13 16:01:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:01:40,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789091493] [2022-12-13 16:01:40,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789091493] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:01:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221585585] [2022-12-13 16:01:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:01:40,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:40,163 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:01:40,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 16:01:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:01:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:01:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:01:40,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:01:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:01:42,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221585585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:01:42,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:01:42,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 16:01:42,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80232331] [2022-12-13 16:01:42,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:01:42,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:01:42,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:42,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:01:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:01:42,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 16:01:42,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 967 places, 2992 transitions, 80330 flow. Second operand has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:42,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:01:42,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 16:01:42,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:02:13,866 INFO L130 PetriNetUnfolder]: 18065/33429 cut-off events. [2022-12-13 16:02:13,866 INFO L131 PetriNetUnfolder]: For 3291049/3301084 co-relation queries the response was YES. [2022-12-13 16:02:14,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425025 conditions, 33429 events. 18065/33429 cut-off events. For 3291049/3301084 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 307545 event pairs, 886 based on Foata normal form. 1291/34296 useless extension candidates. Maximal degree in co-relation 424267. Up to 8915 conditions per place. [2022-12-13 16:02:14,715 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 2052 selfloop transitions, 1440 changer transitions 826/4355 dead transitions. [2022-12-13 16:02:14,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 4355 transitions, 132332 flow [2022-12-13 16:02:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-12-13 16:02:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-12-13 16:02:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 9264 transitions. [2022-12-13 16:02:14,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2022-12-13 16:02:14,721 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 9264 transitions. [2022-12-13 16:02:14,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 9264 transitions. [2022-12-13 16:02:14,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:02:14,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 9264 transitions. [2022-12-13 16:02:14,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 88.22857142857143) internal successors, (9264), 105 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:14,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 192.0) internal successors, (20352), 106 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:14,737 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 192.0) internal successors, (20352), 106 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:14,738 INFO L175 Difference]: Start difference. First operand has 967 places, 2992 transitions, 80330 flow. Second operand 105 states and 9264 transitions. [2022-12-13 16:02:14,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1001 places, 4355 transitions, 132332 flow [2022-12-13 16:02:53,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 910 places, 4355 transitions, 120868 flow, removed 5630 selfloop flow, removed 91 redundant places. [2022-12-13 16:02:54,034 INFO L231 Difference]: Finished difference. Result has 949 places, 3239 transitions, 91152 flow [2022-12-13 16:02:54,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=76674, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=91152, PETRI_PLACES=949, PETRI_TRANSITIONS=3239} [2022-12-13 16:02:54,036 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 919 predicate places. [2022-12-13 16:02:54,036 INFO L495 AbstractCegarLoop]: Abstraction has has 949 places, 3239 transitions, 91152 flow [2022-12-13 16:02:54,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:54,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:02:54,036 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:02:54,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 16:02:54,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:02:54,238 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:02:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:02:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1539594903, now seen corresponding path program 20 times [2022-12-13 16:02:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:02:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874788384] [2022-12-13 16:02:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:02:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:02:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:02:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:02:54,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:02:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874788384] [2022-12-13 16:02:54,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874788384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:02:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861691723] [2022-12-13 16:02:54,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:02:54,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:02:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:02:54,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:02:54,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 16:02:54,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:02:54,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:02:54,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:02:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:02:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:02:55,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:02:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:02:57,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861691723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:02:57,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:02:57,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 16:02:57,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942136931] [2022-12-13 16:02:57,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:02:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:02:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:02:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:02:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:02:57,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 192 [2022-12-13 16:02:57,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 3239 transitions, 91152 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:57,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:02:57,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 192 [2022-12-13 16:02:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:41,102 INFO L130 PetriNetUnfolder]: 29043/48156 cut-off events. [2022-12-13 16:03:41,102 INFO L131 PetriNetUnfolder]: For 1918520/1918520 co-relation queries the response was YES. [2022-12-13 16:03:42,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456926 conditions, 48156 events. 29043/48156 cut-off events. For 1918520/1918520 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 390504 event pairs, 2825 based on Foata normal form. 618/48774 useless extension candidates. Maximal degree in co-relation 456666. Up to 20018 conditions per place. [2022-12-13 16:03:42,377 INFO L137 encePairwiseOnDemand]: 183/192 looper letters, 2422 selfloop transitions, 1452 changer transitions 703/4577 dead transitions. [2022-12-13 16:03:42,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1041 places, 4577 transitions, 135824 flow [2022-12-13 16:03:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-12-13 16:03:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-12-13 16:03:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 12503 transitions. [2022-12-13 16:03:42,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4460259703196347 [2022-12-13 16:03:42,386 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 12503 transitions. [2022-12-13 16:03:42,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 12503 transitions. [2022-12-13 16:03:42,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:42,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 12503 transitions. [2022-12-13 16:03:42,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 85.63698630136986) internal successors, (12503), 146 states have internal predecessors, (12503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 192.0) internal successors, (28224), 147 states have internal predecessors, (28224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,411 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 192.0) internal successors, (28224), 147 states have internal predecessors, (28224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:42,411 INFO L175 Difference]: Start difference. First operand has 949 places, 3239 transitions, 91152 flow. Second operand 146 states and 12503 transitions. [2022-12-13 16:03:42,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1041 places, 4577 transitions, 135824 flow [2022-12-13 16:04:29,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 980 places, 4577 transitions, 122579 flow, removed 4609 selfloop flow, removed 61 redundant places. [2022-12-13 16:04:29,211 INFO L231 Difference]: Finished difference. Result has 1078 places, 3493 transitions, 96198 flow [2022-12-13 16:04:29,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=81303, PETRI_DIFFERENCE_MINUEND_PLACES=835, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=96198, PETRI_PLACES=1078, PETRI_TRANSITIONS=3493} [2022-12-13 16:04:29,213 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 1048 predicate places. [2022-12-13 16:04:29,213 INFO L495 AbstractCegarLoop]: Abstraction has has 1078 places, 3493 transitions, 96198 flow [2022-12-13 16:04:29,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:29,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:29,213 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:29,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 16:04:29,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 16:04:29,415 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:04:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1387035992, now seen corresponding path program 21 times [2022-12-13 16:04:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:29,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447564169] [2022-12-13 16:04:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447564169] [2022-12-13 16:04:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447564169] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:04:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118125471] [2022-12-13 16:04:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:04:29,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:04:29,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:04:29,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:04:29,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 16:04:29,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 16:04:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:04:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:04:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:04:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:30,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:04:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:04:32,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118125471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:04:32,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:04:32,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 16:04:32,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148969231] [2022-12-13 16:04:32,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:04:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:04:32,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:04:32,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:04:32,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 16:04:32,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1078 places, 3493 transitions, 96198 flow. Second operand has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:32,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:32,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 16:04:32,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:10,397 INFO L130 PetriNetUnfolder]: 19373/36108 cut-off events. [2022-12-13 16:05:10,397 INFO L131 PetriNetUnfolder]: For 4260496/4273205 co-relation queries the response was YES. [2022-12-13 16:05:11,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472228 conditions, 36108 events. 19373/36108 cut-off events. For 4260496/4273205 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 337804 event pairs, 1002 based on Foata normal form. 1077/36665 useless extension candidates. Maximal degree in co-relation 470856. Up to 11501 conditions per place. [2022-12-13 16:05:11,360 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 2497 selfloop transitions, 1449 changer transitions 517/4499 dead transitions. [2022-12-13 16:05:11,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1097 places, 4499 transitions, 134370 flow [2022-12-13 16:05:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-13 16:05:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-12-13 16:05:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 9190 transitions. [2022-12-13 16:05:11,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4602363782051282 [2022-12-13 16:05:11,365 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 9190 transitions. [2022-12-13 16:05:11,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 9190 transitions. [2022-12-13 16:05:11,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:11,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 9190 transitions. [2022-12-13 16:05:11,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 88.36538461538461) internal successors, (9190), 104 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:11,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 192.0) internal successors, (20160), 105 states have internal predecessors, (20160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:11,381 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 192.0) internal successors, (20160), 105 states have internal predecessors, (20160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:11,381 INFO L175 Difference]: Start difference. First operand has 1078 places, 3493 transitions, 96198 flow. Second operand 104 states and 9190 transitions. [2022-12-13 16:05:11,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1097 places, 4499 transitions, 134370 flow [2022-12-13 16:06:28,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 4499 transitions, 124948 flow, removed 4577 selfloop flow, removed 100 redundant places. [2022-12-13 16:06:29,006 INFO L231 Difference]: Finished difference. Result has 1039 places, 3667 transitions, 103304 flow [2022-12-13 16:06:29,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=92275, PETRI_DIFFERENCE_MINUEND_PLACES=894, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=103304, PETRI_PLACES=1039, PETRI_TRANSITIONS=3667} [2022-12-13 16:06:29,008 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 1009 predicate places. [2022-12-13 16:06:29,008 INFO L495 AbstractCegarLoop]: Abstraction has has 1039 places, 3667 transitions, 103304 flow [2022-12-13 16:06:29,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:06:29,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:06:29,008 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:06:29,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 16:06:29,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:06:29,210 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:06:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:06:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 534735310, now seen corresponding path program 22 times [2022-12-13 16:06:29,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:06:29,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522863133] [2022-12-13 16:06:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:06:29,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:06:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:06:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:06:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:06:29,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522863133] [2022-12-13 16:06:29,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522863133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:06:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632575937] [2022-12-13 16:06:29,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:06:29,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:06:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:06:29,797 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:06:29,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e424bb3-6ef7-45c4-acab-108cd0163fe5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 16:06:29,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:06:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:06:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:06:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:06:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:06:30,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:06:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:06:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632575937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:06:32,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:06:32,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 16:06:32,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945639077] [2022-12-13 16:06:32,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:06:32,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:06:32,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:06:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:06:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:06:32,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-12-13 16:06:32,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1039 places, 3667 transitions, 103304 flow. Second operand has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:06:32,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:06:32,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-12-13 16:06:32,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:07:12,804 INFO L130 PetriNetUnfolder]: 21125/39027 cut-off events. [2022-12-13 16:07:12,804 INFO L131 PetriNetUnfolder]: For 1900056/1905016 co-relation queries the response was YES. [2022-12-13 16:07:13,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413918 conditions, 39027 events. 21125/39027 cut-off events. For 1900056/1905016 co-relation queries the response was YES. Maximal size of possible extension queue 1736. Compared 361425 event pairs, 788 based on Foata normal form. 1890/40632 useless extension candidates. Maximal degree in co-relation 413221. Up to 11812 conditions per place. [2022-12-13 16:07:13,783 INFO L137 encePairwiseOnDemand]: 185/192 looper letters, 2637 selfloop transitions, 1196 changer transitions 471/4573 dead transitions. [2022-12-13 16:07:13,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1094 places, 4573 transitions, 133851 flow [2022-12-13 16:07:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 16:07:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-12-13 16:07:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 8022 transitions. [2022-12-13 16:07:13,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4642361111111111 [2022-12-13 16:07:13,789 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 8022 transitions. [2022-12-13 16:07:13,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 8022 transitions. [2022-12-13 16:07:13,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:07:13,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 8022 transitions. [2022-12-13 16:07:13,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 89.13333333333334) internal successors, (8022), 90 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:13,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 192.0) internal successors, (17472), 91 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:13,803 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 192.0) internal successors, (17472), 91 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:13,803 INFO L175 Difference]: Start difference. First operand has 1039 places, 3667 transitions, 103304 flow. Second operand 90 states and 8022 transitions. [2022-12-13 16:07:13,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1094 places, 4573 transitions, 133851 flow