./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/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_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/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_703b0766-2589-461e-9cc9-24d5cb86f65a/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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:34:33,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:34:33,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:34:33,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:34:33,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:34:33,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:34:33,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:34:33,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:34:33,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:34:33,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:34:33,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:34:33,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:34:33,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:34:33,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:34:33,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:34:33,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:34:33,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:34:33,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:34:33,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:34:33,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:34:33,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:34:33,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:34:33,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:34:33,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:34:33,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:34:33,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:34:33,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:34:33,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:34:33,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:34:33,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:34:33,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:34:33,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:34:33,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:34:33,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:34:33,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:34:33,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:34:33,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:34:33,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:34:33,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:34:33,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:34:33,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:34:33,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:34:33,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:34:33,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:34:33,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:34:33,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:34:33,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:34:33,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:34:33,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:34:33,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:34:33,926 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:34:33,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:34:33,926 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:34:33,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:34:33,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:34:33,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:34:33,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:34:33,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:34:33,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:34:33,927 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:34:33,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:34:33,928 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:34:33,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:34:33,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:34:33,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:34:33,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:34:33,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:34:33,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:34:33,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:34:33,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:34:33,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:34:33,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:34:33,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:34:33,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:34:33,930 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:34:33,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:34:33,931 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:34:33,931 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_703b0766-2589-461e-9cc9-24d5cb86f65a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-12-13 17:34:34,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:34:34,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:34:34,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:34:34,157 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:34:34,157 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:34:34,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-12-13 17:34:36,768 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:34:36,889 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:34:36,889 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-12-13 17:34:36,893 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/data/f945537de/bd2f33b2d4864b24939f0baf87c29ca4/FLAGc1929177d [2022-12-13 17:34:36,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/data/f945537de/bd2f33b2d4864b24939f0baf87c29ca4 [2022-12-13 17:34:36,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:34:36,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:34:36,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:34:36,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:34:36,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:34:36,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:34:36" (1/1) ... [2022-12-13 17:34:36,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212a9575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:36, skipping insertion in model container [2022-12-13 17:34:36,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:34:36" (1/1) ... [2022-12-13 17:34:36,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:34:36,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:34:37,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:34:37,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:34:37,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:34:37,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:34:37,047 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_703b0766-2589-461e-9cc9-24d5cb86f65a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-13 17:34:37,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:34:37,057 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:34:37,066 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:34:37,067 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:34:37,067 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:34:37,068 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:34:37,071 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_703b0766-2589-461e-9cc9-24d5cb86f65a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-13 17:34:37,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:34:37,081 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:34:37,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37 WrapperNode [2022-12-13 17:34:37,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:34:37,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:34:37,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:34:37,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:34:37,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,113 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-12-13 17:34:37,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:34:37,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:34:37,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:34:37,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:34:37,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:34:37,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:34:37,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:34:37,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:34:37,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (1/1) ... [2022-12-13 17:34:37,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:34:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:37,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:34:37,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:34:37,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:34:37,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:34:37,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:34:37,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:34:37,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:34:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:34:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:34:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:34:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:34:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:34:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:34:37,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:34:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:34:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:34:37,200 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:34:37,283 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:34:37,285 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:34:37,429 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:34:37,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:34:37,461 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 17:34:37,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:34:37 BoogieIcfgContainer [2022-12-13 17:34:37,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:34:37,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:34:37,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:34:37,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:34:37,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:34:36" (1/3) ... [2022-12-13 17:34:37,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcfcff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:34:37, skipping insertion in model container [2022-12-13 17:34:37,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:34:37" (2/3) ... [2022-12-13 17:34:37,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcfcff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:34:37, skipping insertion in model container [2022-12-13 17:34:37,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:34:37" (3/3) ... [2022-12-13 17:34:37,471 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-12-13 17:34:37,479 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:34:37,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:34:37,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:34:37,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:34:37,565 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:34:37,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-12-13 17:34:37,642 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-12-13 17:34:37,642 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:34:37,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-12-13 17:34:37,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-12-13 17:34:37,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-12-13 17:34:37,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:34:37,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2022-12-13 17:34:37,668 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2022-12-13 17:34:37,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2022-12-13 17:34:37,694 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-12-13 17:34:37,694 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:34:37,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-12-13 17:34:37,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-13 17:34:39,312 INFO L134 LiptonReduction]: Checked pairs total: 555 [2022-12-13 17:34:39,312 INFO L136 LiptonReduction]: Total number of compositions: 72 [2022-12-13 17:34:39,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:34:39,330 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;@4afd3cf9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:34:39,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 17:34:39,334 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 17:34:39,334 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:34:39,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:39,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:39,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2052629377, now seen corresponding path program 1 times [2022-12-13 17:34:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972685781] [2022-12-13 17:34:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:39,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:39,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972685781] [2022-12-13 17:34:39,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972685781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:34:39,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:34:39,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:34:39,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057188560] [2022-12-13 17:34:39,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:34:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:34:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:34:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:34:39,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 159 [2022-12-13 17:34:39,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:39,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:39,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 159 [2022-12-13 17:34:39,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:39,726 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-12-13 17:34:39,726 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 17:34:39,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 265 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2022-12-13 17:34:39,728 INFO L137 encePairwiseOnDemand]: 155/159 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-12-13 17:34:39,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2022-12-13 17:34:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:34:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:34:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2022-12-13 17:34:39,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5220125786163522 [2022-12-13 17:34:39,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2022-12-13 17:34:39,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2022-12-13 17:34:39,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:39,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2022-12-13 17:34:39,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:39,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:39,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:39,748 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 249 transitions. [2022-12-13 17:34:39,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2022-12-13 17:34:39,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:34:39,752 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2022-12-13 17:34:39,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2022-12-13 17:34:39,756 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-12-13 17:34:39,756 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2022-12-13 17:34:39,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:39,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:39,757 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:39,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:34:39,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1718087158, now seen corresponding path program 1 times [2022-12-13 17:34:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:39,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293031978] [2022-12-13 17:34:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293031978] [2022-12-13 17:34:39,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293031978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:34:39,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:34:39,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:34:39,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356572602] [2022-12-13 17:34:39,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:34:39,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:34:39,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:34:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:34:39,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2022-12-13 17:34:39,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:39,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:39,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2022-12-13 17:34:39,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:40,019 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2022-12-13 17:34:40,019 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 17:34:40,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 473 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2022-12-13 17:34:40,020 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2022-12-13 17:34:40,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2022-12-13 17:34:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:34:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:34:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 377 transitions. [2022-12-13 17:34:40,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4742138364779874 [2022-12-13 17:34:40,022 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 377 transitions. [2022-12-13 17:34:40,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 377 transitions. [2022-12-13 17:34:40,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:40,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 377 transitions. [2022-12-13 17:34:40,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,025 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,025 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 377 transitions. [2022-12-13 17:34:40,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2022-12-13 17:34:40,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:34:40,026 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2022-12-13 17:34:40,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-12-13 17:34:40,026 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-13 17:34:40,027 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2022-12-13 17:34:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:40,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:40,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:34:40,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash 267842030, now seen corresponding path program 2 times [2022-12-13 17:34:40,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:40,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709810138] [2022-12-13 17:34:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:40,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:40,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709810138] [2022-12-13 17:34:40,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709810138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:40,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395786687] [2022-12-13 17:34:40,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:34:40,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:40,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:40,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:34:40,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:34:40,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:34:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:40,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:40,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395786687] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:40,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:34:40,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-13 17:34:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599716065] [2022-12-13 17:34:40,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:34:40,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:34:40,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:34:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:34:40,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2022-12-13 17:34:40,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:40,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2022-12-13 17:34:40,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:40,381 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2022-12-13 17:34:40,382 INFO L131 PetriNetUnfolder]: For 144/148 co-relation queries the response was YES. [2022-12-13 17:34:40,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 144/148 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 425 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2022-12-13 17:34:40,383 INFO L137 encePairwiseOnDemand]: 155/159 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2022-12-13 17:34:40,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2022-12-13 17:34:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:34:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:34:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2022-12-13 17:34:40,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4889937106918239 [2022-12-13 17:34:40,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2022-12-13 17:34:40,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2022-12-13 17:34:40,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:40,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2022-12-13 17:34:40,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,387 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 311 transitions. [2022-12-13 17:34:40,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2022-12-13 17:34:40,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 17:34:40,388 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2022-12-13 17:34:40,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-12-13 17:34:40,389 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2022-12-13 17:34:40,389 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2022-12-13 17:34:40,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:40,389 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:40,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:34:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:40,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash -804085754, now seen corresponding path program 3 times [2022-12-13 17:34:40,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:40,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096401993] [2022-12-13 17:34:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:40,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:40,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:40,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096401993] [2022-12-13 17:34:40,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096401993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:40,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819442311] [2022-12-13 17:34:40,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:34:40,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:40,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:40,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:40,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:34:40,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:34:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:34:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:40,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:40,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819442311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:40,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:40,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-13 17:34:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013011086] [2022-12-13 17:34:40,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:40,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:34:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:34:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:34:40,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:40,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:40,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:40,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:40,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:41,030 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2022-12-13 17:34:41,030 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2022-12-13 17:34:41,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 698 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2022-12-13 17:34:41,033 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2022-12-13 17:34:41,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2022-12-13 17:34:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:34:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:34:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 522 transitions. [2022-12-13 17:34:41,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2022-12-13 17:34:41,035 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 522 transitions. [2022-12-13 17:34:41,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 522 transitions. [2022-12-13 17:34:41,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:41,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 522 transitions. [2022-12-13 17:34:41,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,040 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,041 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 522 transitions. [2022-12-13 17:34:41,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2022-12-13 17:34:41,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:34:41,044 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2022-12-13 17:34:41,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-12-13 17:34:41,045 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2022-12-13 17:34:41,045 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2022-12-13 17:34:41,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:41,046 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:41,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:34:41,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:41,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash -787803948, now seen corresponding path program 4 times [2022-12-13 17:34:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:41,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711446228] [2022-12-13 17:34:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:41,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:41,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711446228] [2022-12-13 17:34:41,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711446228] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096540476] [2022-12-13 17:34:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:34:41,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:41,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:41,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:34:41,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:34:41,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:34:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:41,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096540476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:41,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:41,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 17:34:41,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670548449] [2022-12-13 17:34:41,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:41,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:34:41,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:34:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:34:41,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:41,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:41,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:41,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:41,701 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2022-12-13 17:34:41,701 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2022-12-13 17:34:41,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 627 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2022-12-13 17:34:41,704 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2022-12-13 17:34:41,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2022-12-13 17:34:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:34:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:34:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2022-12-13 17:34:41,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4691823899371069 [2022-12-13 17:34:41,707 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2022-12-13 17:34:41,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2022-12-13 17:34:41,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:41,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2022-12-13 17:34:41,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 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 17:34:41,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,712 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 373 transitions. [2022-12-13 17:34:41,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2022-12-13 17:34:41,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 17:34:41,718 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2022-12-13 17:34:41,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2022-12-13 17:34:41,719 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-13 17:34:41,719 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2022-12-13 17:34:41,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:41,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:41,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:41,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:34:41,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:41,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1505819693, now seen corresponding path program 1 times [2022-12-13 17:34:41,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:41,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741984895] [2022-12-13 17:34:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:42,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:42,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741984895] [2022-12-13 17:34:42,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741984895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:42,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996314840] [2022-12-13 17:34:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:42,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:42,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:42,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:42,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:34:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:34:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:42,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:42,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996314840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:42,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:42,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2022-12-13 17:34:42,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468925952] [2022-12-13 17:34:42,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:42,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:34:42,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:34:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:34:42,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 159 [2022-12-13 17:34:42,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 77.5) internal successors, (465), 6 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:42,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:42,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 159 [2022-12-13 17:34:42,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:42,243 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2022-12-13 17:34:42,243 INFO L131 PetriNetUnfolder]: For 501/518 co-relation queries the response was YES. [2022-12-13 17:34:42,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 501/518 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 873 event pairs, 20 based on Foata normal form. 18/246 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2022-12-13 17:34:42,246 INFO L137 encePairwiseOnDemand]: 155/159 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-12-13 17:34:42,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2022-12-13 17:34:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:34:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:34:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2022-12-13 17:34:42,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2022-12-13 17:34:42,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2022-12-13 17:34:42,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2022-12-13 17:34:42,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:42,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2022-12-13 17:34:42,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:42,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:42,249 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:42,249 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 327 transitions. [2022-12-13 17:34:42,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2022-12-13 17:34:42,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 17:34:42,251 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2022-12-13 17:34:42,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-12-13 17:34:42,251 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-13 17:34:42,252 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2022-12-13 17:34:42,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.5) internal successors, (465), 6 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:42,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:42,252 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:42,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:34:42,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:42,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:42,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1852987554, now seen corresponding path program 2 times [2022-12-13 17:34:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:42,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325179466] [2022-12-13 17:34:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:42,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:42,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325179466] [2022-12-13 17:34:42,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325179466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286050212] [2022-12-13 17:34:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:34:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:42,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:42,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:34:42,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:34:42,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:42,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:42,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286050212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:42,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:42,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 17:34:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593202840] [2022-12-13 17:34:42,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:34:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:34:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:34:42,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:42,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:42,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:42,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:42,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:43,761 INFO L130 PetriNetUnfolder]: 353/729 cut-off events. [2022-12-13 17:34:43,761 INFO L131 PetriNetUnfolder]: For 1336/1336 co-relation queries the response was YES. [2022-12-13 17:34:43,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 729 events. 353/729 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3775 event pairs, 10 based on Foata normal form. 16/745 useless extension candidates. Maximal degree in co-relation 1446. Up to 239 conditions per place. [2022-12-13 17:34:43,767 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 110 selfloop transitions, 63 changer transitions 44/217 dead transitions. [2022-12-13 17:34:43,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 217 transitions, 1575 flow [2022-12-13 17:34:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 17:34:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 17:34:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2334 transitions. [2022-12-13 17:34:43,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45872641509433965 [2022-12-13 17:34:43,774 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2334 transitions. [2022-12-13 17:34:43,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2334 transitions. [2022-12-13 17:34:43,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:43,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2334 transitions. [2022-12-13 17:34:43,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 72.9375) internal successors, (2334), 32 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:43,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 159.0) internal successors, (5247), 33 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:43,791 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 159.0) internal successors, (5247), 33 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:43,791 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 32 states and 2334 transitions. [2022-12-13 17:34:43,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 217 transitions, 1575 flow [2022-12-13 17:34:43,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 217 transitions, 1533 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-12-13 17:34:43,798 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 898 flow [2022-12-13 17:34:43,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=898, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2022-12-13 17:34:43,799 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-12-13 17:34:43,799 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 898 flow [2022-12-13 17:34:43,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:43,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:43,800 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:43,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:34:44,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 17:34:44,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1485158418, now seen corresponding path program 3 times [2022-12-13 17:34:44,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:44,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891218015] [2022-12-13 17:34:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:44,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:44,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891218015] [2022-12-13 17:34:44,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891218015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100082357] [2022-12-13 17:34:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:34:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:44,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:44,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:34:44,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:34:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:44,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:44,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100082357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:44,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:44,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-13 17:34:44,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022071760] [2022-12-13 17:34:44,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:44,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:34:44,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:34:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:34:44,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:44,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 898 flow. Second operand has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:44,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:44,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:44,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:44,671 INFO L130 PetriNetUnfolder]: 319/640 cut-off events. [2022-12-13 17:34:44,671 INFO L131 PetriNetUnfolder]: For 3917/3917 co-relation queries the response was YES. [2022-12-13 17:34:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 640 events. 319/640 cut-off events. For 3917/3917 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3099 event pairs, 29 based on Foata normal form. 18/658 useless extension candidates. Maximal degree in co-relation 2854. Up to 294 conditions per place. [2022-12-13 17:34:44,680 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 103 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2022-12-13 17:34:44,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 138 transitions, 1517 flow [2022-12-13 17:34:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:34:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:34:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 739 transitions. [2022-12-13 17:34:44,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4647798742138365 [2022-12-13 17:34:44,684 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 739 transitions. [2022-12-13 17:34:44,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 739 transitions. [2022-12-13 17:34:44,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:44,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 739 transitions. [2022-12-13 17:34:44,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:44,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 159.0) internal successors, (1749), 11 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:44,690 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 159.0) internal successors, (1749), 11 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:44,690 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 898 flow. Second operand 10 states and 739 transitions. [2022-12-13 17:34:44,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 138 transitions, 1517 flow [2022-12-13 17:34:44,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 138 transitions, 1205 flow, removed 121 selfloop flow, removed 6 redundant places. [2022-12-13 17:34:44,701 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 851 flow [2022-12-13 17:34:44,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=851, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2022-12-13 17:34:44,701 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-12-13 17:34:44,701 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 851 flow [2022-12-13 17:34:44,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:44,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:44,702 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:44,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 17:34:44,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:34:44,903 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1944351656, now seen corresponding path program 4 times [2022-12-13 17:34:44,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965874011] [2022-12-13 17:34:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:44,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:45,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965874011] [2022-12-13 17:34:45,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965874011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:45,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371379838] [2022-12-13 17:34:45,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:34:45,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:45,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:45,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:34:45,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:34:45,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:45,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:45,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371379838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:45,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:45,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 17:34:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736257192] [2022-12-13 17:34:45,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:45,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:34:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:34:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:34:45,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:45,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 851 flow. Second operand has 14 states, 14 states have (on average 69.14285714285714) internal successors, (968), 14 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:45,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:45,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:45,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:45,757 INFO L130 PetriNetUnfolder]: 403/794 cut-off events. [2022-12-13 17:34:45,757 INFO L131 PetriNetUnfolder]: For 8252/8252 co-relation queries the response was YES. [2022-12-13 17:34:45,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4142 conditions, 794 events. 403/794 cut-off events. For 8252/8252 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4054 event pairs, 43 based on Foata normal form. 48/842 useless extension candidates. Maximal degree in co-relation 3658. Up to 350 conditions per place. [2022-12-13 17:34:45,763 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 126 selfloop transitions, 66 changer transitions 0/192 dead transitions. [2022-12-13 17:34:45,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 192 transitions, 1892 flow [2022-12-13 17:34:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:34:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:34:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1321 transitions. [2022-12-13 17:34:45,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4615653389238295 [2022-12-13 17:34:45,767 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1321 transitions. [2022-12-13 17:34:45,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1321 transitions. [2022-12-13 17:34:45,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:45,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1321 transitions. [2022-12-13 17:34:45,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 73.38888888888889) internal successors, (1321), 18 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:45,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 159.0) internal successors, (3021), 19 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:45,777 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 159.0) internal successors, (3021), 19 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:45,777 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 851 flow. Second operand 18 states and 1321 transitions. [2022-12-13 17:34:45,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 192 transitions, 1892 flow [2022-12-13 17:34:45,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 192 transitions, 1745 flow, removed 55 selfloop flow, removed 4 redundant places. [2022-12-13 17:34:45,803 INFO L231 Difference]: Finished difference. Result has 100 places, 128 transitions, 1354 flow [2022-12-13 17:34:45,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1354, PETRI_PLACES=100, PETRI_TRANSITIONS=128} [2022-12-13 17:34:45,804 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-12-13 17:34:45,805 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 128 transitions, 1354 flow [2022-12-13 17:34:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.14285714285714) internal successors, (968), 14 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:45,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:45,805 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:45,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:34:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:46,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1122102446, now seen corresponding path program 5 times [2022-12-13 17:34:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086600598] [2022-12-13 17:34:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:46,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086600598] [2022-12-13 17:34:46,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086600598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063754643] [2022-12-13 17:34:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:34:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:46,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:46,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:34:46,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:34:46,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:46,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063754643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:46,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:46,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 17:34:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797433313] [2022-12-13 17:34:46,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:46,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:34:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:34:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:34:46,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:46,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 128 transitions, 1354 flow. Second operand has 15 states, 15 states have (on average 69.13333333333334) internal successors, (1037), 15 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:46,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:46,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:46,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:46,904 INFO L130 PetriNetUnfolder]: 405/798 cut-off events. [2022-12-13 17:34:46,904 INFO L131 PetriNetUnfolder]: For 14826/14826 co-relation queries the response was YES. [2022-12-13 17:34:46,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4848 conditions, 798 events. 405/798 cut-off events. For 14826/14826 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4124 event pairs, 32 based on Foata normal form. 24/822 useless extension candidates. Maximal degree in co-relation 4298. Up to 215 conditions per place. [2022-12-13 17:34:46,909 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 101 selfloop transitions, 86 changer transitions 3/190 dead transitions. [2022-12-13 17:34:46,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 2099 flow [2022-12-13 17:34:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:34:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:34:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1458 transitions. [2022-12-13 17:34:46,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45849056603773586 [2022-12-13 17:34:46,913 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1458 transitions. [2022-12-13 17:34:46,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1458 transitions. [2022-12-13 17:34:46,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:46,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1458 transitions. [2022-12-13 17:34:46,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.9) internal successors, (1458), 20 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:46,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 159.0) internal successors, (3339), 21 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:46,919 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 159.0) internal successors, (3339), 21 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:46,919 INFO L175 Difference]: Start difference. First operand has 100 places, 128 transitions, 1354 flow. Second operand 20 states and 1458 transitions. [2022-12-13 17:34:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 2099 flow [2022-12-13 17:34:46,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1818 flow, removed 109 selfloop flow, removed 7 redundant places. [2022-12-13 17:34:46,952 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1390 flow [2022-12-13 17:34:46,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1390, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2022-12-13 17:34:46,953 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2022-12-13 17:34:46,954 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1390 flow [2022-12-13 17:34:46,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.13333333333334) internal successors, (1037), 15 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:46,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:46,954 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:46,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:34:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:34:47,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash 663773908, now seen corresponding path program 6 times [2022-12-13 17:34:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:47,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139104861] [2022-12-13 17:34:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139104861] [2022-12-13 17:34:47,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139104861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005923062] [2022-12-13 17:34:47,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:34:47,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:47,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:47,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:34:47,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 17:34:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:47,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:47,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005923062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:47,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:47,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 17:34:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109929511] [2022-12-13 17:34:47,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:34:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:34:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:34:47,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:47,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1390 flow. Second operand has 15 states, 15 states have (on average 69.06666666666666) internal successors, (1036), 15 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:47,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:47,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:47,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:48,209 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2022-12-13 17:34:48,210 INFO L131 PetriNetUnfolder]: For 34875/34875 co-relation queries the response was YES. [2022-12-13 17:34:48,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8348 conditions, 1264 events. 649/1264 cut-off events. For 34875/34875 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7409 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 7750. Up to 686 conditions per place. [2022-12-13 17:34:48,218 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 185 selfloop transitions, 122 changer transitions 2/309 dead transitions. [2022-12-13 17:34:48,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 309 transitions, 3682 flow [2022-12-13 17:34:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 17:34:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 17:34:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1763 transitions. [2022-12-13 17:34:48,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4620020964360587 [2022-12-13 17:34:48,221 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1763 transitions. [2022-12-13 17:34:48,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1763 transitions. [2022-12-13 17:34:48,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:48,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1763 transitions. [2022-12-13 17:34:48,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.45833333333333) internal successors, (1763), 24 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:48,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 159.0) internal successors, (3975), 25 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:48,227 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 159.0) internal successors, (3975), 25 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:48,227 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1390 flow. Second operand 24 states and 1763 transitions. [2022-12-13 17:34:48,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 309 transitions, 3682 flow [2022-12-13 17:34:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 309 transitions, 3395 flow, removed 81 selfloop flow, removed 17 redundant places. [2022-12-13 17:34:48,278 INFO L231 Difference]: Finished difference. Result has 136 places, 199 transitions, 2723 flow [2022-12-13 17:34:48,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2723, PETRI_PLACES=136, PETRI_TRANSITIONS=199} [2022-12-13 17:34:48,278 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2022-12-13 17:34:48,278 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 199 transitions, 2723 flow [2022-12-13 17:34:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.06666666666666) internal successors, (1036), 15 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:48,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:48,279 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:48,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:34:48,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:48,481 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash -648728792, now seen corresponding path program 7 times [2022-12-13 17:34:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:48,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635171809] [2022-12-13 17:34:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:48,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635171809] [2022-12-13 17:34:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635171809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110344787] [2022-12-13 17:34:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:34:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:48,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:48,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:34:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:48,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:48,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110344787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:48,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:48,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 17:34:48,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921655405] [2022-12-13 17:34:48,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:48,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:34:48,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:34:48,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:34:48,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:48,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 199 transitions, 2723 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:48,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:48,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:48,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:49,522 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2022-12-13 17:34:49,522 INFO L131 PetriNetUnfolder]: For 52643/52643 co-relation queries the response was YES. [2022-12-13 17:34:49,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12106 conditions, 1518 events. 759/1518 cut-off events. For 52643/52643 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9447 event pairs, 63 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 11226. Up to 501 conditions per place. [2022-12-13 17:34:49,533 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 145 selfloop transitions, 163 changer transitions 6/314 dead transitions. [2022-12-13 17:34:49,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 314 transitions, 5032 flow [2022-12-13 17:34:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:34:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 17:34:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1592 transitions. [2022-12-13 17:34:49,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45511720983419096 [2022-12-13 17:34:49,536 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1592 transitions. [2022-12-13 17:34:49,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1592 transitions. [2022-12-13 17:34:49,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:49,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1592 transitions. [2022-12-13 17:34:49,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.36363636363636) internal successors, (1592), 22 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:49,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 159.0) internal successors, (3657), 23 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:49,540 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 159.0) internal successors, (3657), 23 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:49,540 INFO L175 Difference]: Start difference. First operand has 136 places, 199 transitions, 2723 flow. Second operand 22 states and 1592 transitions. [2022-12-13 17:34:49,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 314 transitions, 5032 flow [2022-12-13 17:34:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 314 transitions, 4303 flow, removed 340 selfloop flow, removed 6 redundant places. [2022-12-13 17:34:49,674 INFO L231 Difference]: Finished difference. Result has 160 places, 244 transitions, 3508 flow [2022-12-13 17:34:49,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3508, PETRI_PLACES=160, PETRI_TRANSITIONS=244} [2022-12-13 17:34:49,674 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2022-12-13 17:34:49,674 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 244 transitions, 3508 flow [2022-12-13 17:34:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:49,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:49,675 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:49,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 17:34:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 17:34:49,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:49,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1508792614, now seen corresponding path program 8 times [2022-12-13 17:34:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:49,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894158373] [2022-12-13 17:34:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894158373] [2022-12-13 17:34:49,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894158373] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489818110] [2022-12-13 17:34:49,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:34:49,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:49,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:49,993 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:49,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:34:50,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:34:50,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:34:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:50,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:50,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489818110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:50,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:50,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 17:34:50,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839652217] [2022-12-13 17:34:50,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:50,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:34:50,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:34:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:34:50,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:50,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 244 transitions, 3508 flow. Second operand has 15 states, 15 states have (on average 68.8) internal successors, (1032), 15 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:50,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:50,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:50,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:50,856 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2022-12-13 17:34:50,856 INFO L131 PetriNetUnfolder]: For 67493/67493 co-relation queries the response was YES. [2022-12-13 17:34:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11789 conditions, 1444 events. 729/1444 cut-off events. For 67493/67493 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8792 event pairs, 151 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 11195. Up to 681 conditions per place. [2022-12-13 17:34:50,866 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 130 selfloop transitions, 143 changer transitions 3/276 dead transitions. [2022-12-13 17:34:50,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 276 transitions, 4158 flow [2022-12-13 17:34:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:34:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:34:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 948 transitions. [2022-12-13 17:34:50,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45863570391872277 [2022-12-13 17:34:50,867 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 948 transitions. [2022-12-13 17:34:50,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 948 transitions. [2022-12-13 17:34:50,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:50,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 948 transitions. [2022-12-13 17:34:50,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.92307692307692) internal successors, (948), 13 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:50,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:50,870 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:50,870 INFO L175 Difference]: Start difference. First operand has 160 places, 244 transitions, 3508 flow. Second operand 13 states and 948 transitions. [2022-12-13 17:34:50,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 276 transitions, 4158 flow [2022-12-13 17:34:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 276 transitions, 3958 flow, removed 96 selfloop flow, removed 3 redundant places. [2022-12-13 17:34:51,008 INFO L231 Difference]: Finished difference. Result has 170 places, 239 transitions, 3666 flow [2022-12-13 17:34:51,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3666, PETRI_PLACES=170, PETRI_TRANSITIONS=239} [2022-12-13 17:34:51,009 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2022-12-13 17:34:51,009 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 239 transitions, 3666 flow [2022-12-13 17:34:51,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.8) internal successors, (1032), 15 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:51,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:51,009 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:51,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:34:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:51,210 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -508078061, now seen corresponding path program 9 times [2022-12-13 17:34:51,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:51,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453261194] [2022-12-13 17:34:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:51,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453261194] [2022-12-13 17:34:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453261194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507765956] [2022-12-13 17:34:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:34:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:51,331 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:51,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:34:51,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:34:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:34:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:51,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:51,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507765956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:51,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:51,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 17:34:51,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118393803] [2022-12-13 17:34:51,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:34:51,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:34:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:34:51,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2022-12-13 17:34:51,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 239 transitions, 3666 flow. Second operand has 10 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:51,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:51,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2022-12-13 17:34:51,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:52,007 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2022-12-13 17:34:52,007 INFO L131 PetriNetUnfolder]: For 96356/96369 co-relation queries the response was YES. [2022-12-13 17:34:52,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15839 conditions, 1788 events. 879/1788 cut-off events. For 96356/96369 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11862 event pairs, 132 based on Foata normal form. 84/1872 useless extension candidates. Maximal degree in co-relation 13743. Up to 900 conditions per place. [2022-12-13 17:34:52,019 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 191 selfloop transitions, 92 changer transitions 53/342 dead transitions. [2022-12-13 17:34:52,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 342 transitions, 5846 flow [2022-12-13 17:34:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:34:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:34:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2022-12-13 17:34:52,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2022-12-13 17:34:52,030 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 471 transitions. [2022-12-13 17:34:52,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 471 transitions. [2022-12-13 17:34:52,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:52,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 471 transitions. [2022-12-13 17:34:52,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.5) internal successors, (471), 6 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:52,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:52,032 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:52,032 INFO L175 Difference]: Start difference. First operand has 170 places, 239 transitions, 3666 flow. Second operand 6 states and 471 transitions. [2022-12-13 17:34:52,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 342 transitions, 5846 flow [2022-12-13 17:34:52,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 342 transitions, 5570 flow, removed 35 selfloop flow, removed 14 redundant places. [2022-12-13 17:34:52,219 INFO L231 Difference]: Finished difference. Result has 163 places, 250 transitions, 4191 flow [2022-12-13 17:34:52,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4191, PETRI_PLACES=163, PETRI_TRANSITIONS=250} [2022-12-13 17:34:52,219 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2022-12-13 17:34:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 250 transitions, 4191 flow [2022-12-13 17:34:52,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:52,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:52,220 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:52,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 17:34:52,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:52,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1434111792, now seen corresponding path program 10 times [2022-12-13 17:34:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069207960] [2022-12-13 17:34:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:52,560 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 17:34:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069207960] [2022-12-13 17:34:52,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069207960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153782444] [2022-12-13 17:34:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:34:52,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:52,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:52,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:34:52,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:34:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:34:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:52,680 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 17:34:52,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:52,765 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 17:34:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153782444] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:52,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:52,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:34:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710379893] [2022-12-13 17:34:52,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:52,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:34:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:34:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:34:52,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:52,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 250 transitions, 4191 flow. Second operand has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:52,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:52,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:52,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:54,041 INFO L130 PetriNetUnfolder]: 1659/3370 cut-off events. [2022-12-13 17:34:54,042 INFO L131 PetriNetUnfolder]: For 179212/179212 co-relation queries the response was YES. [2022-12-13 17:34:54,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30147 conditions, 3370 events. 1659/3370 cut-off events. For 179212/179212 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24791 event pairs, 205 based on Foata normal form. 68/3438 useless extension candidates. Maximal degree in co-relation 24291. Up to 1276 conditions per place. [2022-12-13 17:34:54,063 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 449 selfloop transitions, 151 changer transitions 2/602 dead transitions. [2022-12-13 17:34:54,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 602 transitions, 10729 flow [2022-12-13 17:34:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:34:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 17:34:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1257 transitions. [2022-12-13 17:34:54,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46503884572697 [2022-12-13 17:34:54,065 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1257 transitions. [2022-12-13 17:34:54,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1257 transitions. [2022-12-13 17:34:54,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:54,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1257 transitions. [2022-12-13 17:34:54,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 73.94117647058823) internal successors, (1257), 17 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:54,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:54,068 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:54,068 INFO L175 Difference]: Start difference. First operand has 163 places, 250 transitions, 4191 flow. Second operand 17 states and 1257 transitions. [2022-12-13 17:34:54,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 602 transitions, 10729 flow [2022-12-13 17:34:54,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 602 transitions, 10451 flow, removed 120 selfloop flow, removed 8 redundant places. [2022-12-13 17:34:54,541 INFO L231 Difference]: Finished difference. Result has 171 places, 366 transitions, 6690 flow [2022-12-13 17:34:54,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6690, PETRI_PLACES=171, PETRI_TRANSITIONS=366} [2022-12-13 17:34:54,542 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2022-12-13 17:34:54,542 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 366 transitions, 6690 flow [2022-12-13 17:34:54,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:54,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:54,542 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:54,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:34:54,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:34:54,744 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1226282562, now seen corresponding path program 11 times [2022-12-13 17:34:54,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:54,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958106158] [2022-12-13 17:34:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:54,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:54,889 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 17:34:54,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958106158] [2022-12-13 17:34:54,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958106158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56735583] [2022-12-13 17:34:54,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:34:54,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:54,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:54,891 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:34:54,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:34:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:34:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:55,021 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 17:34:55,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:55,118 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 17:34:55,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56735583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:55,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:55,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:34:55,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349060726] [2022-12-13 17:34:55,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:55,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:34:55,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:55,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:34:55,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:34:55,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:55,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 366 transitions, 6690 flow. Second operand has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:55,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:55,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:55,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:57,362 INFO L130 PetriNetUnfolder]: 1784/3601 cut-off events. [2022-12-13 17:34:57,362 INFO L131 PetriNetUnfolder]: For 173307/173307 co-relation queries the response was YES. [2022-12-13 17:34:57,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33268 conditions, 3601 events. 1784/3601 cut-off events. For 173307/173307 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26662 event pairs, 241 based on Foata normal form. 58/3659 useless extension candidates. Maximal degree in co-relation 30013. Up to 1329 conditions per place. [2022-12-13 17:34:57,395 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 509 selfloop transitions, 197 changer transitions 2/708 dead transitions. [2022-12-13 17:34:57,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 708 transitions, 12715 flow [2022-12-13 17:34:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:34:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 17:34:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2561 transitions. [2022-12-13 17:34:57,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601976639712489 [2022-12-13 17:34:57,399 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2561 transitions. [2022-12-13 17:34:57,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2561 transitions. [2022-12-13 17:34:57,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:57,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2561 transitions. [2022-12-13 17:34:57,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.17142857142858) internal successors, (2561), 35 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:57,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 159.0) internal successors, (5724), 36 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:57,407 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 159.0) internal successors, (5724), 36 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:57,407 INFO L175 Difference]: Start difference. First operand has 171 places, 366 transitions, 6690 flow. Second operand 35 states and 2561 transitions. [2022-12-13 17:34:57,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 708 transitions, 12715 flow [2022-12-13 17:34:57,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 708 transitions, 12314 flow, removed 180 selfloop flow, removed 4 redundant places. [2022-12-13 17:34:57,970 INFO L231 Difference]: Finished difference. Result has 212 places, 423 transitions, 8216 flow [2022-12-13 17:34:57,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8216, PETRI_PLACES=212, PETRI_TRANSITIONS=423} [2022-12-13 17:34:57,971 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2022-12-13 17:34:57,971 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 423 transitions, 8216 flow [2022-12-13 17:34:57,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:57,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:57,971 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:57,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:34:58,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:34:58,172 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:58,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1065115702, now seen corresponding path program 12 times [2022-12-13 17:34:58,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247910664] [2022-12-13 17:34:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:58,418 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 17:34:58,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:58,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247910664] [2022-12-13 17:34:58,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247910664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:58,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547945296] [2022-12-13 17:34:58,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:34:58,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:58,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:58,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:58,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:34:58,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 17:34:58,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:34:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:58,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:58,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547945296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:58,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:58,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-13 17:34:58,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546703307] [2022-12-13 17:34:58,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:58,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:34:58,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:34:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:34:58,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:34:58,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 423 transitions, 8216 flow. Second operand has 22 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:34:58,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:58,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:34:58,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:02,280 INFO L130 PetriNetUnfolder]: 2196/4456 cut-off events. [2022-12-13 17:35:02,280 INFO L131 PetriNetUnfolder]: For 275587/275587 co-relation queries the response was YES. [2022-12-13 17:35:02,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45083 conditions, 4456 events. 2196/4456 cut-off events. For 275587/275587 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34772 event pairs, 72 based on Foata normal form. 38/4494 useless extension candidates. Maximal degree in co-relation 44621. Up to 1141 conditions per place. [2022-12-13 17:35:02,316 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 299 selfloop transitions, 580 changer transitions 36/915 dead transitions. [2022-12-13 17:35:02,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 915 transitions, 18805 flow [2022-12-13 17:35:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 17:35:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-13 17:35:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4348 transitions. [2022-12-13 17:35:02,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45576519916142555 [2022-12-13 17:35:02,321 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4348 transitions. [2022-12-13 17:35:02,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4348 transitions. [2022-12-13 17:35:02,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:02,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4348 transitions. [2022-12-13 17:35:02,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 72.46666666666667) internal successors, (4348), 60 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:02,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 159.0) internal successors, (9699), 61 states have internal predecessors, (9699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:02,334 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 159.0) internal successors, (9699), 61 states have internal predecessors, (9699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:02,334 INFO L175 Difference]: Start difference. First operand has 212 places, 423 transitions, 8216 flow. Second operand 60 states and 4348 transitions. [2022-12-13 17:35:02,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 915 transitions, 18805 flow [2022-12-13 17:35:03,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 915 transitions, 18013 flow, removed 341 selfloop flow, removed 10 redundant places. [2022-12-13 17:35:03,414 INFO L231 Difference]: Finished difference. Result has 278 places, 676 transitions, 15023 flow [2022-12-13 17:35:03,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=7731, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15023, PETRI_PLACES=278, PETRI_TRANSITIONS=676} [2022-12-13 17:35:03,415 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 258 predicate places. [2022-12-13 17:35:03,415 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 676 transitions, 15023 flow [2022-12-13 17:35:03,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:03,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:03,416 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:03,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 17:35:03,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:35:03,617 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash 205051880, now seen corresponding path program 13 times [2022-12-13 17:35:03,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:03,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420597802] [2022-12-13 17:35:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:03,804 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 17:35:03,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420597802] [2022-12-13 17:35:03,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420597802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419201087] [2022-12-13 17:35:03,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:35:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:03,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:03,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:35:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:03,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:04,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419201087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:04,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:04,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-12-13 17:35:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352435365] [2022-12-13 17:35:04,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:04,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 17:35:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 17:35:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:35:04,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:04,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 676 transitions, 15023 flow. Second operand has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:04,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:04,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:04,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:07,042 INFO L130 PetriNetUnfolder]: 2161/4333 cut-off events. [2022-12-13 17:35:07,042 INFO L131 PetriNetUnfolder]: For 451525/451525 co-relation queries the response was YES. [2022-12-13 17:35:07,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49467 conditions, 4333 events. 2161/4333 cut-off events. For 451525/451525 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33253 event pairs, 172 based on Foata normal form. 72/4405 useless extension candidates. Maximal degree in co-relation 48973. Up to 1079 conditions per place. [2022-12-13 17:35:07,078 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 372 selfloop transitions, 480 changer transitions 3/855 dead transitions. [2022-12-13 17:35:07,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 855 transitions, 18886 flow [2022-12-13 17:35:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:35:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 17:35:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3212 transitions. [2022-12-13 17:35:07,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2022-12-13 17:35:07,082 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3212 transitions. [2022-12-13 17:35:07,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3212 transitions. [2022-12-13 17:35:07,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:07,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3212 transitions. [2022-12-13 17:35:07,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 73.0) internal successors, (3212), 44 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:07,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 159.0) internal successors, (7155), 45 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:07,118 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 159.0) internal successors, (7155), 45 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:07,118 INFO L175 Difference]: Start difference. First operand has 278 places, 676 transitions, 15023 flow. Second operand 44 states and 3212 transitions. [2022-12-13 17:35:07,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 855 transitions, 18886 flow [2022-12-13 17:35:08,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 855 transitions, 16941 flow, removed 868 selfloop flow, removed 16 redundant places. [2022-12-13 17:35:08,775 INFO L231 Difference]: Finished difference. Result has 313 places, 681 transitions, 14652 flow [2022-12-13 17:35:08,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=12879, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14652, PETRI_PLACES=313, PETRI_TRANSITIONS=681} [2022-12-13 17:35:08,776 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 293 predicate places. [2022-12-13 17:35:08,776 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 681 transitions, 14652 flow [2022-12-13 17:35:08,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:08,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:08,776 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:08,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 17:35:08,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:35:08,978 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1577953558, now seen corresponding path program 14 times [2022-12-13 17:35:08,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589499250] [2022-12-13 17:35:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:08,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:09,082 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 17:35:09,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589499250] [2022-12-13 17:35:09,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589499250] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318646642] [2022-12-13 17:35:09,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:35:09,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:09,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:09,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:09,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 17:35:09,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:35:09,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:35:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:09,192 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 17:35:09,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:09,282 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 17:35:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318646642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:09,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:09,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 17:35:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073353351] [2022-12-13 17:35:09,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:09,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:35:09,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:35:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:35:09,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:09,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 681 transitions, 14652 flow. Second operand has 17 states, 17 states have (on average 68.76470588235294) internal successors, (1169), 17 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:09,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:09,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:09,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:12,605 INFO L130 PetriNetUnfolder]: 2353/4705 cut-off events. [2022-12-13 17:35:12,605 INFO L131 PetriNetUnfolder]: For 583118/583118 co-relation queries the response was YES. [2022-12-13 17:35:12,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54283 conditions, 4705 events. 2353/4705 cut-off events. For 583118/583118 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36671 event pairs, 249 based on Foata normal form. 90/4795 useless extension candidates. Maximal degree in co-relation 53739. Up to 1742 conditions per place. [2022-12-13 17:35:12,645 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 572 selfloop transitions, 325 changer transitions 20/917 dead transitions. [2022-12-13 17:35:12,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 917 transitions, 19963 flow [2022-12-13 17:35:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:35:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 17:35:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2558 transitions. [2022-12-13 17:35:12,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4596585804132974 [2022-12-13 17:35:12,648 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2558 transitions. [2022-12-13 17:35:12,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2558 transitions. [2022-12-13 17:35:12,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:12,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2558 transitions. [2022-12-13 17:35:12,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.08571428571429) internal successors, (2558), 35 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:12,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 159.0) internal successors, (5724), 36 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:12,671 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 159.0) internal successors, (5724), 36 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:12,671 INFO L175 Difference]: Start difference. First operand has 313 places, 681 transitions, 14652 flow. Second operand 35 states and 2558 transitions. [2022-12-13 17:35:12,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 917 transitions, 19963 flow [2022-12-13 17:35:14,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 917 transitions, 19366 flow, removed 113 selfloop flow, removed 30 redundant places. [2022-12-13 17:35:14,532 INFO L231 Difference]: Finished difference. Result has 324 places, 739 transitions, 16674 flow [2022-12-13 17:35:14,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=14089, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16674, PETRI_PLACES=324, PETRI_TRANSITIONS=739} [2022-12-13 17:35:14,533 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 304 predicate places. [2022-12-13 17:35:14,533 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 739 transitions, 16674 flow [2022-12-13 17:35:14,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.76470588235294) internal successors, (1169), 17 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:14,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:14,533 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:14,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 17:35:14,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:14,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1710800458, now seen corresponding path program 15 times [2022-12-13 17:35:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342048116] [2022-12-13 17:35:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:14,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:14,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342048116] [2022-12-13 17:35:14,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342048116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:14,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284412195] [2022-12-13 17:35:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:35:14,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:14,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:14,850 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:14,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:35:14,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:35:14,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:35:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:14,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:14,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:15,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284412195] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:15,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:15,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 17:35:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941281365] [2022-12-13 17:35:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:35:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:35:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:35:15,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:15,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 739 transitions, 16674 flow. Second operand has 18 states, 18 states have (on average 68.61111111111111) internal successors, (1235), 18 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:15,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:15,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:15,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:21,839 INFO L130 PetriNetUnfolder]: 2789/5587 cut-off events. [2022-12-13 17:35:21,839 INFO L131 PetriNetUnfolder]: For 767871/767871 co-relation queries the response was YES. [2022-12-13 17:35:21,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67039 conditions, 5587 events. 2789/5587 cut-off events. For 767871/767871 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 45183 event pairs, 706 based on Foata normal form. 90/5677 useless extension candidates. Maximal degree in co-relation 66357. Up to 3278 conditions per place. [2022-12-13 17:35:21,888 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 608 selfloop transitions, 410 changer transitions 24/1042 dead transitions. [2022-12-13 17:35:21,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1042 transitions, 24366 flow [2022-12-13 17:35:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 17:35:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 17:35:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2967 transitions. [2022-12-13 17:35:21,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45513115508513574 [2022-12-13 17:35:21,891 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2967 transitions. [2022-12-13 17:35:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2967 transitions. [2022-12-13 17:35:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:21,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2967 transitions. [2022-12-13 17:35:21,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.36585365853658) internal successors, (2967), 41 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:21,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 159.0) internal successors, (6678), 42 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:21,923 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 159.0) internal successors, (6678), 42 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:21,923 INFO L175 Difference]: Start difference. First operand has 324 places, 739 transitions, 16674 flow. Second operand 41 states and 2967 transitions. [2022-12-13 17:35:21,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1042 transitions, 24366 flow [2022-12-13 17:35:24,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1042 transitions, 23892 flow, removed 177 selfloop flow, removed 14 redundant places. [2022-12-13 17:35:24,560 INFO L231 Difference]: Finished difference. Result has 363 places, 862 transitions, 21254 flow [2022-12-13 17:35:24,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=16261, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21254, PETRI_PLACES=363, PETRI_TRANSITIONS=862} [2022-12-13 17:35:24,561 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 343 predicate places. [2022-12-13 17:35:24,561 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 862 transitions, 21254 flow [2022-12-13 17:35:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 68.61111111111111) internal successors, (1235), 18 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:24,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:24,561 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:24,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 17:35:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:24,763 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2094128912, now seen corresponding path program 16 times [2022-12-13 17:35:24,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:24,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855369934] [2022-12-13 17:35:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:24,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:24,929 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 17:35:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855369934] [2022-12-13 17:35:24,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855369934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420740070] [2022-12-13 17:35:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:35:24,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:24,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:24,930 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:24,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 17:35:24,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:35:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:35:24,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:25,052 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 17:35:25,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:25,167 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 17:35:25,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420740070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:25,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:25,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:35:25,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760491346] [2022-12-13 17:35:25,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:35:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:35:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:35:25,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:25,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 862 transitions, 21254 flow. Second operand has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:25,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:25,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:25,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:29,236 INFO L130 PetriNetUnfolder]: 3178/6320 cut-off events. [2022-12-13 17:35:29,236 INFO L131 PetriNetUnfolder]: For 1026289/1026289 co-relation queries the response was YES. [2022-12-13 17:35:29,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82229 conditions, 6320 events. 3178/6320 cut-off events. For 1026289/1026289 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 51939 event pairs, 984 based on Foata normal form. 58/6378 useless extension candidates. Maximal degree in co-relation 81289. Up to 4281 conditions per place. [2022-12-13 17:35:29,298 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 847 selfloop transitions, 312 changer transitions 4/1163 dead transitions. [2022-12-13 17:35:29,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1163 transitions, 28440 flow [2022-12-13 17:35:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:35:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 17:35:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2847 transitions. [2022-12-13 17:35:29,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2022-12-13 17:35:29,301 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2847 transitions. [2022-12-13 17:35:29,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2847 transitions. [2022-12-13 17:35:29,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:29,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2847 transitions. [2022-12-13 17:35:29,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 73.0) internal successors, (2847), 39 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:29,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 159.0) internal successors, (6360), 40 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:29,307 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 159.0) internal successors, (6360), 40 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:29,307 INFO L175 Difference]: Start difference. First operand has 363 places, 862 transitions, 21254 flow. Second operand 39 states and 2847 transitions. [2022-12-13 17:35:29,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1163 transitions, 28440 flow [2022-12-13 17:35:33,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1163 transitions, 27951 flow, removed 187 selfloop flow, removed 18 redundant places. [2022-12-13 17:35:33,073 INFO L231 Difference]: Finished difference. Result has 395 places, 966 transitions, 24688 flow [2022-12-13 17:35:33,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=20777, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24688, PETRI_PLACES=395, PETRI_TRANSITIONS=966} [2022-12-13 17:35:33,074 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2022-12-13 17:35:33,074 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 966 transitions, 24688 flow [2022-12-13 17:35:33,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:33,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:33,074 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:33,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 17:35:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:33,275 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1259421174, now seen corresponding path program 17 times [2022-12-13 17:35:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:33,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118700175] [2022-12-13 17:35:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:33,379 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 17:35:33,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118700175] [2022-12-13 17:35:33,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118700175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946228032] [2022-12-13 17:35:33,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:35:33,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:33,381 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:33,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 17:35:33,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:35:33,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:35:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:33,503 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 17:35:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:33,610 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 17:35:33,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946228032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:33,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:33,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 17:35:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960807335] [2022-12-13 17:35:33,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:33,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:35:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:35:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:35:33,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:33,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 966 transitions, 24688 flow. Second operand has 17 states, 17 states have (on average 68.82352941176471) internal successors, (1170), 17 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:33,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:33,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:33,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:38,491 INFO L130 PetriNetUnfolder]: 3456/6883 cut-off events. [2022-12-13 17:35:38,491 INFO L131 PetriNetUnfolder]: For 1237655/1237655 co-relation queries the response was YES. [2022-12-13 17:35:38,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92840 conditions, 6883 events. 3456/6883 cut-off events. For 1237655/1237655 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 57401 event pairs, 1230 based on Foata normal form. 56/6939 useless extension candidates. Maximal degree in co-relation 91805. Up to 5461 conditions per place. [2022-12-13 17:35:38,568 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 916 selfloop transitions, 244 changer transitions 24/1184 dead transitions. [2022-12-13 17:35:38,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1184 transitions, 30812 flow [2022-12-13 17:35:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:35:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 17:35:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1975 transitions. [2022-12-13 17:35:38,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46005124621476823 [2022-12-13 17:35:38,570 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1975 transitions. [2022-12-13 17:35:38,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1975 transitions. [2022-12-13 17:35:38,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:38,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1975 transitions. [2022-12-13 17:35:38,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.14814814814815) internal successors, (1975), 27 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:38,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 159.0) internal successors, (4452), 28 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:38,574 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 159.0) internal successors, (4452), 28 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:38,574 INFO L175 Difference]: Start difference. First operand has 395 places, 966 transitions, 24688 flow. Second operand 27 states and 1975 transitions. [2022-12-13 17:35:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1184 transitions, 30812 flow [2022-12-13 17:35:43,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1184 transitions, 30023 flow, removed 349 selfloop flow, removed 12 redundant places. [2022-12-13 17:35:43,422 INFO L231 Difference]: Finished difference. Result has 419 places, 1027 transitions, 26567 flow [2022-12-13 17:35:43,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=23853, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26567, PETRI_PLACES=419, PETRI_TRANSITIONS=1027} [2022-12-13 17:35:43,423 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 399 predicate places. [2022-12-13 17:35:43,423 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1027 transitions, 26567 flow [2022-12-13 17:35:43,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.82352941176471) internal successors, (1170), 17 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:43,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:43,423 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:43,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 17:35:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 17:35:43,624 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -993687000, now seen corresponding path program 18 times [2022-12-13 17:35:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752305261] [2022-12-13 17:35:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:43,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752305261] [2022-12-13 17:35:43,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752305261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000691695] [2022-12-13 17:35:43,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:35:43,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:43,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:43,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 17:35:43,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:35:43,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:35:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:43,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000691695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:43,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:43,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:35:43,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926822802] [2022-12-13 17:35:43,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:43,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:35:43,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:35:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:35:44,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:44,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1027 transitions, 26567 flow. Second operand has 16 states, 16 states have (on average 68.6875) internal successors, (1099), 16 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:44,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:44,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:48,694 INFO L130 PetriNetUnfolder]: 3726/7375 cut-off events. [2022-12-13 17:35:48,694 INFO L131 PetriNetUnfolder]: For 1432819/1432819 co-relation queries the response was YES. [2022-12-13 17:35:48,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99833 conditions, 7375 events. 3726/7375 cut-off events. For 1432819/1432819 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 61861 event pairs, 1353 based on Foata normal form. 96/7471 useless extension candidates. Maximal degree in co-relation 98309. Up to 6093 conditions per place. [2022-12-13 17:35:48,775 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 1045 selfloop transitions, 262 changer transitions 3/1310 dead transitions. [2022-12-13 17:35:48,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1310 transitions, 34709 flow [2022-12-13 17:35:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 17:35:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 17:35:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2624 transitions. [2022-12-13 17:35:48,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4584206848357792 [2022-12-13 17:35:48,778 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2624 transitions. [2022-12-13 17:35:48,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2624 transitions. [2022-12-13 17:35:48,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:48,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2624 transitions. [2022-12-13 17:35:48,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.88888888888889) internal successors, (2624), 36 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:48,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:48,783 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:48,783 INFO L175 Difference]: Start difference. First operand has 419 places, 1027 transitions, 26567 flow. Second operand 36 states and 2624 transitions. [2022-12-13 17:35:48,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1310 transitions, 34709 flow [2022-12-13 17:35:55,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1310 transitions, 33948 flow, removed 305 selfloop flow, removed 12 redundant places. [2022-12-13 17:35:55,025 INFO L231 Difference]: Finished difference. Result has 456 places, 1127 transitions, 29992 flow [2022-12-13 17:35:55,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=26085, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29992, PETRI_PLACES=456, PETRI_TRANSITIONS=1127} [2022-12-13 17:35:55,026 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2022-12-13 17:35:55,026 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1127 transitions, 29992 flow [2022-12-13 17:35:55,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.6875) internal successors, (1099), 16 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:55,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:55,027 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:55,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 17:35:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:55,228 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:35:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2090918086, now seen corresponding path program 19 times [2022-12-13 17:35:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354342314] [2022-12-13 17:35:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:55,428 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 17:35:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354342314] [2022-12-13 17:35:55,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354342314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305556933] [2022-12-13 17:35:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:35:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:55,430 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:55,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 17:35:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:35:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:55,539 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 17:35:55,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:55,635 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 17:35:55,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305556933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:55,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:55,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-13 17:35:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949525908] [2022-12-13 17:35:55,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:55,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:35:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:35:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:35:55,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:35:55,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1127 transitions, 29992 flow. Second operand has 21 states, 21 states have (on average 68.61904761904762) internal successors, (1441), 21 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:35:55,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:55,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:35:55,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:36:02,706 INFO L130 PetriNetUnfolder]: 4138/8331 cut-off events. [2022-12-13 17:36:02,706 INFO L131 PetriNetUnfolder]: For 1976177/1976177 co-relation queries the response was YES. [2022-12-13 17:36:02,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119563 conditions, 8331 events. 4138/8331 cut-off events. For 1976177/1976177 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 72663 event pairs, 751 based on Foata normal form. 72/8403 useless extension candidates. Maximal degree in co-relation 118379. Up to 2940 conditions per place. [2022-12-13 17:36:02,804 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 642 selfloop transitions, 790 changer transitions 13/1445 dead transitions. [2022-12-13 17:36:02,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1445 transitions, 39152 flow [2022-12-13 17:36:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 17:36:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 17:36:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2515 transitions. [2022-12-13 17:36:02,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4652238253792083 [2022-12-13 17:36:02,807 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2515 transitions. [2022-12-13 17:36:02,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2515 transitions. [2022-12-13 17:36:02,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:36:02,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2515 transitions. [2022-12-13 17:36:02,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.97058823529412) internal successors, (2515), 34 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:02,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 159.0) internal successors, (5565), 35 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:02,812 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 159.0) internal successors, (5565), 35 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:02,812 INFO L175 Difference]: Start difference. First operand has 456 places, 1127 transitions, 29992 flow. Second operand 34 states and 2515 transitions. [2022-12-13 17:36:02,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1445 transitions, 39152 flow [2022-12-13 17:36:11,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1445 transitions, 38094 flow, removed 447 selfloop flow, removed 15 redundant places. [2022-12-13 17:36:11,562 INFO L231 Difference]: Finished difference. Result has 489 places, 1245 transitions, 35208 flow [2022-12-13 17:36:11,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=28954, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=35208, PETRI_PLACES=489, PETRI_TRANSITIONS=1245} [2022-12-13 17:36:11,563 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 469 predicate places. [2022-12-13 17:36:11,563 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 1245 transitions, 35208 flow [2022-12-13 17:36:11,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.61904761904762) internal successors, (1441), 21 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:11,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:36:11,563 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:36:11,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 17:36:11,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 17:36:11,764 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:36:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:36:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash -159873786, now seen corresponding path program 20 times [2022-12-13 17:36:11,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:36:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474693464] [2022-12-13 17:36:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:36:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:36:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:36:11,861 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 17:36:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:36:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474693464] [2022-12-13 17:36:11,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474693464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:36:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808565655] [2022-12-13 17:36:11,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:36:11,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:36:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:36:11,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:36:11,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 17:36:11,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:36:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:36:11,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:36:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:36:11,972 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 17:36:11,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:36:12,064 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 17:36:12,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808565655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:36:12,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:36:12,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:36:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952279592] [2022-12-13 17:36:12,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:36:12,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:36:12,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:36:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:36:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:36:12,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:36:12,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1245 transitions, 35208 flow. Second operand has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:12,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:36:12,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:36:12,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:36:17,560 INFO L130 PetriNetUnfolder]: 4369/8746 cut-off events. [2022-12-13 17:36:17,560 INFO L131 PetriNetUnfolder]: For 2473809/2473809 co-relation queries the response was YES. [2022-12-13 17:36:17,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131573 conditions, 8746 events. 4369/8746 cut-off events. For 2473809/2473809 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 76470 event pairs, 1720 based on Foata normal form. 132/8878 useless extension candidates. Maximal degree in co-relation 130485. Up to 7862 conditions per place. [2022-12-13 17:36:17,672 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 1257 selfloop transitions, 199 changer transitions 4/1460 dead transitions. [2022-12-13 17:36:17,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 1460 transitions, 41886 flow [2022-12-13 17:36:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 17:36:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 17:36:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2619 transitions. [2022-12-13 17:36:17,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2022-12-13 17:36:17,675 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2619 transitions. [2022-12-13 17:36:17,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2619 transitions. [2022-12-13 17:36:17,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:36:17,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2619 transitions. [2022-12-13 17:36:17,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.75) internal successors, (2619), 36 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:17,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:17,679 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:17,679 INFO L175 Difference]: Start difference. First operand has 489 places, 1245 transitions, 35208 flow. Second operand 36 states and 2619 transitions. [2022-12-13 17:36:17,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 1460 transitions, 41886 flow [2022-12-13 17:36:27,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1460 transitions, 40439 flow, removed 670 selfloop flow, removed 9 redundant places. [2022-12-13 17:36:27,603 INFO L231 Difference]: Finished difference. Result has 530 places, 1320 transitions, 36832 flow [2022-12-13 17:36:27,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=34339, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=36832, PETRI_PLACES=530, PETRI_TRANSITIONS=1320} [2022-12-13 17:36:27,604 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 510 predicate places. [2022-12-13 17:36:27,604 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 1320 transitions, 36832 flow [2022-12-13 17:36:27,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:27,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:36:27,604 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:36:27,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 17:36:27,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 17:36:27,805 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:36:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:36:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1158462134, now seen corresponding path program 21 times [2022-12-13 17:36:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:36:27,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367247354] [2022-12-13 17:36:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:36:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:36:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:36:27,958 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 17:36:27,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:36:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367247354] [2022-12-13 17:36:27,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367247354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:36:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116923485] [2022-12-13 17:36:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:36:27,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:36:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:36:27,960 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:36:27,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 17:36:28,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:36:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:36:28,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:36:28,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:36:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:28,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:36:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:28,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116923485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:36:28,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:36:28,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-13 17:36:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517620324] [2022-12-13 17:36:28,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:36:28,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:36:28,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:36:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:36:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:36:28,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:36:28,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 1320 transitions, 36832 flow. Second operand has 21 states, 21 states have (on average 68.57142857142857) internal successors, (1440), 21 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:28,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:36:28,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:36:28,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:36:37,177 INFO L130 PetriNetUnfolder]: 4343/8662 cut-off events. [2022-12-13 17:36:37,177 INFO L131 PetriNetUnfolder]: For 2488580/2488580 co-relation queries the response was YES. [2022-12-13 17:36:37,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135910 conditions, 8662 events. 4343/8662 cut-off events. For 2488580/2488580 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 75367 event pairs, 307 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 135061. Up to 2242 conditions per place. [2022-12-13 17:36:37,316 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 462 selfloop transitions, 1042 changer transitions 20/1524 dead transitions. [2022-12-13 17:36:37,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 1524 transitions, 44046 flow [2022-12-13 17:36:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 17:36:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 17:36:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3797 transitions. [2022-12-13 17:36:37,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45057553103120923 [2022-12-13 17:36:37,320 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3797 transitions. [2022-12-13 17:36:37,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3797 transitions. [2022-12-13 17:36:37,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:36:37,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3797 transitions. [2022-12-13 17:36:37,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 71.64150943396227) internal successors, (3797), 53 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:37,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 159.0) internal successors, (8586), 54 states have internal predecessors, (8586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:37,328 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 159.0) internal successors, (8586), 54 states have internal predecessors, (8586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:37,328 INFO L175 Difference]: Start difference. First operand has 530 places, 1320 transitions, 36832 flow. Second operand 53 states and 3797 transitions. [2022-12-13 17:36:37,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 1524 transitions, 44046 flow [2022-12-13 17:36:49,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1524 transitions, 42757 flow, removed 591 selfloop flow, removed 13 redundant places. [2022-12-13 17:36:49,706 INFO L231 Difference]: Finished difference. Result has 576 places, 1369 transitions, 39786 flow [2022-12-13 17:36:49,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=35653, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=39786, PETRI_PLACES=576, PETRI_TRANSITIONS=1369} [2022-12-13 17:36:49,708 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2022-12-13 17:36:49,708 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1369 transitions, 39786 flow [2022-12-13 17:36:49,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.57142857142857) internal successors, (1440), 21 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:49,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:36:49,708 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:36:49,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 17:36:49,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 17:36:49,909 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:36:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:36:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash 565828032, now seen corresponding path program 22 times [2022-12-13 17:36:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:36:49,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300178073] [2022-12-13 17:36:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:36:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:36:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:36:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:36:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300178073] [2022-12-13 17:36:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300178073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:36:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326261517] [2022-12-13 17:36:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:36:50,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:36:50,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:36:50,019 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:36:50,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 17:36:50,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:36:50,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:36:50,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:36:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:36:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:50,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:36:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:50,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326261517] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:36:50,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:36:50,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 17:36:50,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899224090] [2022-12-13 17:36:50,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:36:50,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:36:50,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:36:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:36:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:36:50,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:36:50,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1369 transitions, 39786 flow. Second operand has 17 states, 17 states have (on average 68.6470588235294) internal successors, (1167), 17 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:50,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:36:50,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:36:50,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:36:58,059 INFO L130 PetriNetUnfolder]: 4554/9035 cut-off events. [2022-12-13 17:36:58,059 INFO L131 PetriNetUnfolder]: For 2882492/2882492 co-relation queries the response was YES. [2022-12-13 17:36:58,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143549 conditions, 9035 events. 4554/9035 cut-off events. For 2882492/2882492 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 78496 event pairs, 1400 based on Foata normal form. 70/9105 useless extension candidates. Maximal degree in co-relation 142775. Up to 6692 conditions per place. [2022-12-13 17:36:58,220 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 1080 selfloop transitions, 463 changer transitions 21/1564 dead transitions. [2022-12-13 17:36:58,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1564 transitions, 46814 flow [2022-12-13 17:36:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 17:36:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 17:36:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2114 transitions. [2022-12-13 17:36:58,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4584688787681631 [2022-12-13 17:36:58,223 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2114 transitions. [2022-12-13 17:36:58,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2114 transitions. [2022-12-13 17:36:58,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:36:58,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2114 transitions. [2022-12-13 17:36:58,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 72.89655172413794) internal successors, (2114), 29 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:58,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 159.0) internal successors, (4770), 30 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:58,229 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 159.0) internal successors, (4770), 30 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:36:58,229 INFO L175 Difference]: Start difference. First operand has 576 places, 1369 transitions, 39786 flow. Second operand 29 states and 2114 transitions. [2022-12-13 17:36:58,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1564 transitions, 46814 flow [2022-12-13 17:37:14,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1564 transitions, 45240 flow, removed 553 selfloop flow, removed 19 redundant places. [2022-12-13 17:37:14,500 INFO L231 Difference]: Finished difference. Result has 592 places, 1439 transitions, 42300 flow [2022-12-13 17:37:14,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=38519, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=42300, PETRI_PLACES=592, PETRI_TRANSITIONS=1439} [2022-12-13 17:37:14,501 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2022-12-13 17:37:14,501 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1439 transitions, 42300 flow [2022-12-13 17:37:14,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.6470588235294) internal successors, (1167), 17 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:14,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:14,501 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:14,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 17:37:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 17:37:14,702 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:37:14,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash -127311321, now seen corresponding path program 23 times [2022-12-13 17:37:14,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160050881] [2022-12-13 17:37:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160050881] [2022-12-13 17:37:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160050881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:37:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601510977] [2022-12-13 17:37:14,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:37:14,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:37:14,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:37:14,816 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:37:14,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 17:37:14,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:37:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:37:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:37:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:37:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:37:14,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:37:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:37:14,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601510977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:37:14,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:37:14,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 17:37:14,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094507863] [2022-12-13 17:37:14,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:37:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:37:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:37:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:37:15,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2022-12-13 17:37:15,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1439 transitions, 42300 flow. Second operand has 13 states, 13 states have (on average 73.46153846153847) internal successors, (955), 13 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:15,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:15,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2022-12-13 17:37:15,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:22,005 INFO L130 PetriNetUnfolder]: 5686/11328 cut-off events. [2022-12-13 17:37:22,005 INFO L131 PetriNetUnfolder]: For 3735356/3735356 co-relation queries the response was YES. [2022-12-13 17:37:22,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188670 conditions, 11328 events. 5686/11328 cut-off events. For 3735356/3735356 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 102342 event pairs, 605 based on Foata normal form. 194/11521 useless extension candidates. Maximal degree in co-relation 187661. Up to 5610 conditions per place. [2022-12-13 17:37:22,169 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 1061 selfloop transitions, 704 changer transitions 146/1913 dead transitions. [2022-12-13 17:37:22,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1913 transitions, 59852 flow [2022-12-13 17:37:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:37:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:37:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 558 transitions. [2022-12-13 17:37:22,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2022-12-13 17:37:22,170 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 558 transitions. [2022-12-13 17:37:22,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 558 transitions. [2022-12-13 17:37:22,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:22,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 558 transitions. [2022-12-13 17:37:22,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:22,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:22,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:22,172 INFO L175 Difference]: Start difference. First operand has 592 places, 1439 transitions, 42300 flow. Second operand 7 states and 558 transitions. [2022-12-13 17:37:22,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1913 transitions, 59852 flow [2022-12-13 17:37:42,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1913 transitions, 59365 flow, removed 139 selfloop flow, removed 23 redundant places. [2022-12-13 17:37:42,648 INFO L231 Difference]: Finished difference. Result has 576 places, 1640 transitions, 52620 flow [2022-12-13 17:37:42,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=41789, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52620, PETRI_PLACES=576, PETRI_TRANSITIONS=1640} [2022-12-13 17:37:42,650 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2022-12-13 17:37:42,650 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1640 transitions, 52620 flow [2022-12-13 17:37:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.46153846153847) internal successors, (955), 13 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:42,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:42,650 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 17:37:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 17:37:42,851 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:37:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash -987496540, now seen corresponding path program 24 times [2022-12-13 17:37:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:42,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828998339] [2022-12-13 17:37:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:42,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828998339] [2022-12-13 17:37:42,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828998339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:37:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872873255] [2022-12-13 17:37:42,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:37:42,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:37:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:37:42,997 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:37:42,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 17:37:43,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:37:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:37:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:37:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:37:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:43,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:37:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:43,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872873255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:37:43,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:37:43,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-13 17:37:43,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871266365] [2022-12-13 17:37:43,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:37:43,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:37:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:37:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:37:43,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:37:43,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1640 transitions, 52620 flow. Second operand has 19 states, 19 states have (on average 68.78947368421052) internal successors, (1307), 19 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:43,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:43,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:37:43,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:57,136 INFO L130 PetriNetUnfolder]: 9340/18621 cut-off events. [2022-12-13 17:37:57,136 INFO L131 PetriNetUnfolder]: For 6290171/6290171 co-relation queries the response was YES. [2022-12-13 17:37:57,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309676 conditions, 18621 events. 9340/18621 cut-off events. For 6290171/6290171 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 179635 event pairs, 1195 based on Foata normal form. 166/18787 useless extension candidates. Maximal degree in co-relation 308047. Up to 6831 conditions per place. [2022-12-13 17:37:57,486 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 2489 selfloop transitions, 627 changer transitions 2/3118 dead transitions. [2022-12-13 17:37:57,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 3118 transitions, 102585 flow [2022-12-13 17:37:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:37:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 17:37:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1921 transitions. [2022-12-13 17:37:57,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646831156265119 [2022-12-13 17:37:57,489 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1921 transitions. [2022-12-13 17:37:57,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1921 transitions. [2022-12-13 17:37:57,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:57,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1921 transitions. [2022-12-13 17:37:57,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.88461538461539) internal successors, (1921), 26 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:57,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 159.0) internal successors, (4293), 27 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:57,493 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 159.0) internal successors, (4293), 27 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:37:57,493 INFO L175 Difference]: Start difference. First operand has 576 places, 1640 transitions, 52620 flow. Second operand 26 states and 1921 transitions. [2022-12-13 17:37:57,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 3118 transitions, 102585 flow [2022-12-13 17:38:37,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 3118 transitions, 101184 flow, removed 637 selfloop flow, removed 15 redundant places. [2022-12-13 17:38:37,069 INFO L231 Difference]: Finished difference. Result has 579 places, 2013 transitions, 65119 flow [2022-12-13 17:38:37,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=51829, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=65119, PETRI_PLACES=579, PETRI_TRANSITIONS=2013} [2022-12-13 17:38:37,070 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 559 predicate places. [2022-12-13 17:38:37,070 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 2013 transitions, 65119 flow [2022-12-13 17:38:37,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 68.78947368421052) internal successors, (1307), 19 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:37,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:37,071 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:37,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 17:38:37,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 17:38:37,272 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:38:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash -119650190, now seen corresponding path program 25 times [2022-12-13 17:38:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:37,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421844579] [2022-12-13 17:38:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:37,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421844579] [2022-12-13 17:38:37,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421844579] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499243885] [2022-12-13 17:38:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:38:37,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:37,411 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:37,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 17:38:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:38:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:37,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:37,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499243885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:37,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:37,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-12-13 17:38:37,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798314613] [2022-12-13 17:38:37,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:37,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:38:37,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:38:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:38:37,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:38:37,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 2013 transitions, 65119 flow. Second operand has 20 states, 20 states have (on average 68.7) internal successors, (1374), 20 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:37,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:37,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:38:37,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:55,883 INFO L130 PetriNetUnfolder]: 9793/19464 cut-off events. [2022-12-13 17:38:55,883 INFO L131 PetriNetUnfolder]: For 5927049/5927049 co-relation queries the response was YES. [2022-12-13 17:38:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318855 conditions, 19464 events. 9793/19464 cut-off events. For 5927049/5927049 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 188637 event pairs, 1251 based on Foata normal form. 200/19664 useless extension candidates. Maximal degree in co-relation 317021. Up to 7006 conditions per place. [2022-12-13 17:38:56,317 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 2629 selfloop transitions, 771 changer transitions 2/3402 dead transitions. [2022-12-13 17:38:56,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 3402 transitions, 111352 flow [2022-12-13 17:38:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 17:38:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-13 17:38:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4246 transitions. [2022-12-13 17:38:56,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46042073302971154 [2022-12-13 17:38:56,321 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4246 transitions. [2022-12-13 17:38:56,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4246 transitions. [2022-12-13 17:38:56,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:56,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4246 transitions. [2022-12-13 17:38:56,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 73.20689655172414) internal successors, (4246), 58 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:56,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 159.0) internal successors, (9381), 59 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:56,330 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 159.0) internal successors, (9381), 59 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:56,330 INFO L175 Difference]: Start difference. First operand has 579 places, 2013 transitions, 65119 flow. Second operand 58 states and 4246 transitions. [2022-12-13 17:38:56,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 3402 transitions, 111352 flow [2022-12-13 17:39:38,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 3402 transitions, 109026 flow, removed 1034 selfloop flow, removed 10 redundant places. [2022-12-13 17:39:38,273 INFO L231 Difference]: Finished difference. Result has 638 places, 2205 transitions, 72289 flow [2022-12-13 17:39:38,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=63371, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=72289, PETRI_PLACES=638, PETRI_TRANSITIONS=2205} [2022-12-13 17:39:38,275 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 618 predicate places. [2022-12-13 17:39:38,275 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 2205 transitions, 72289 flow [2022-12-13 17:39:38,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.7) internal successors, (1374), 20 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:39:38,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:39:38,275 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:39:38,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 17:39:38,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:39:38,477 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:39:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:39:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1353902430, now seen corresponding path program 26 times [2022-12-13 17:39:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:39:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347668156] [2022-12-13 17:39:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:39:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:39:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:39:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:39:38,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:39:38,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347668156] [2022-12-13 17:39:38,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347668156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:39:38,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105085020] [2022-12-13 17:39:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:39:38,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:39:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:39:38,595 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:39:38,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 17:39:38,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:39:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:39:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:39:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:39:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:39:38,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:39:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:39:38,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105085020] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:39:38,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:39:38,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-13 17:39:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602774777] [2022-12-13 17:39:38,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:39:38,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 17:39:38,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:39:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 17:39:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:39:38,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:39:38,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 2205 transitions, 72289 flow. Second operand has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:39:38,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:39:38,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:39:38,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:40:45,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 17:41:07,106 INFO L130 PetriNetUnfolder]: 11339/22812 cut-off events. [2022-12-13 17:41:07,107 INFO L131 PetriNetUnfolder]: For 8665331/8665331 co-relation queries the response was YES. [2022-12-13 17:41:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409368 conditions, 22812 events. 11339/22812 cut-off events. For 8665331/8665331 co-relation queries the response was YES. Maximal size of possible extension queue 1752. Compared 228694 event pairs, 354 based on Foata normal form. 84/22896 useless extension candidates. Maximal degree in co-relation 407525. Up to 5983 conditions per place. [2022-12-13 17:41:07,591 INFO L137 encePairwiseOnDemand]: 153/159 looper letters, 855 selfloop transitions, 3173 changer transitions 72/4100 dead transitions. [2022-12-13 17:41:07,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 4100 transitions, 141348 flow [2022-12-13 17:41:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-12-13 17:41:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2022-12-13 17:41:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 7994 transitions. [2022-12-13 17:41:07,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4570611778158948 [2022-12-13 17:41:07,599 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 7994 transitions. [2022-12-13 17:41:07,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 7994 transitions. [2022-12-13 17:41:07,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:41:07,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 7994 transitions. [2022-12-13 17:41:07,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 72.67272727272727) internal successors, (7994), 110 states have internal predecessors, (7994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:41:07,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 159.0) internal successors, (17649), 111 states have internal predecessors, (17649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:41:07,616 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 159.0) internal successors, (17649), 111 states have internal predecessors, (17649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:41:07,616 INFO L175 Difference]: Start difference. First operand has 638 places, 2205 transitions, 72289 flow. Second operand 110 states and 7994 transitions. [2022-12-13 17:41:07,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 4100 transitions, 141348 flow [2022-12-13 17:42:14,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 4100 transitions, 138702 flow, removed 1212 selfloop flow, removed 15 redundant places. [2022-12-13 17:42:14,289 INFO L231 Difference]: Finished difference. Result has 773 places, 3519 transitions, 126729 flow [2022-12-13 17:42:14,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=70151, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=126729, PETRI_PLACES=773, PETRI_TRANSITIONS=3519} [2022-12-13 17:42:14,291 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 753 predicate places. [2022-12-13 17:42:14,291 INFO L495 AbstractCegarLoop]: Abstraction has has 773 places, 3519 transitions, 126729 flow [2022-12-13 17:42:14,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.47826086956522) internal successors, (1575), 23 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:14,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:14,291 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:14,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 17:42:14,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 17:42:14,492 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:42:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash -355314082, now seen corresponding path program 27 times [2022-12-13 17:42:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:14,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192104895] [2022-12-13 17:42:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:14,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:14,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192104895] [2022-12-13 17:42:14,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192104895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:14,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915479199] [2022-12-13 17:42:14,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:42:14,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:14,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:14,658 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:14,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 17:42:14,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:42:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:14,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:42:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:14,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:14,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915479199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:14,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:14,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-13 17:42:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586179326] [2022-12-13 17:42:14,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:42:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:42:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:42:15,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:42:15,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 3519 transitions, 126729 flow. Second operand has 21 states, 21 states have (on average 68.66666666666667) internal successors, (1442), 21 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:15,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:15,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:42:15,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:43:05,414 INFO L130 PetriNetUnfolder]: 11811/23442 cut-off events. [2022-12-13 17:43:05,414 INFO L131 PetriNetUnfolder]: For 13810359/13810359 co-relation queries the response was YES. [2022-12-13 17:43:05,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465589 conditions, 23442 events. 11811/23442 cut-off events. For 13810359/13810359 co-relation queries the response was YES. Maximal size of possible extension queue 1820. Compared 232916 event pairs, 1371 based on Foata normal form. 178/23620 useless extension candidates. Maximal degree in co-relation 463803. Up to 8535 conditions per place. [2022-12-13 17:43:05,969 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 2951 selfloop transitions, 1200 changer transitions 45/4196 dead transitions. [2022-12-13 17:43:05,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 4196 transitions, 150819 flow [2022-12-13 17:43:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 17:43:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-12-13 17:43:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4680 transitions. [2022-12-13 17:43:05,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2022-12-13 17:43:05,974 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4680 transitions. [2022-12-13 17:43:05,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4680 transitions. [2022-12-13 17:43:05,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:43:05,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4680 transitions. [2022-12-13 17:43:05,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 73.125) internal successors, (4680), 64 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:05,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:05,986 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:05,986 INFO L175 Difference]: Start difference. First operand has 773 places, 3519 transitions, 126729 flow. Second operand 64 states and 4680 transitions. [2022-12-13 17:43:05,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 4196 transitions, 150819 flow [2022-12-13 17:45:26,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 4196 transitions, 137445 flow, removed 6322 selfloop flow, removed 28 redundant places. [2022-12-13 17:45:26,767 INFO L231 Difference]: Finished difference. Result has 820 places, 3714 transitions, 123911 flow [2022-12-13 17:45:26,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=114328, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=123911, PETRI_PLACES=820, PETRI_TRANSITIONS=3714} [2022-12-13 17:45:26,769 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 800 predicate places. [2022-12-13 17:45:26,769 INFO L495 AbstractCegarLoop]: Abstraction has has 820 places, 3714 transitions, 123911 flow [2022-12-13 17:45:26,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.66666666666667) internal successors, (1442), 21 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:26,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:26,770 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:26,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 17:45:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 17:45:26,970 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:45:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1134090914, now seen corresponding path program 28 times [2022-12-13 17:45:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:26,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825028279] [2022-12-13 17:45:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825028279] [2022-12-13 17:45:27,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825028279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501367378] [2022-12-13 17:45:27,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:45:27,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:27,128 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:27,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703b0766-2589-461e-9cc9-24d5cb86f65a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 17:45:27,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:45:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:45:27,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:27,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:27,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501367378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:27,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:27,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-12-13 17:45:27,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331515694] [2022-12-13 17:45:27,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:45:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:45:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:45:27,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2022-12-13 17:45:27,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 3714 transitions, 123911 flow. Second operand has 22 states, 22 states have (on average 68.63636363636364) internal successors, (1510), 22 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:27,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:27,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2022-12-13 17:45:27,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:29,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 17:46:19,247 INFO L130 PetriNetUnfolder]: 13740/27618 cut-off events. [2022-12-13 17:46:19,247 INFO L131 PetriNetUnfolder]: For 21261017/21261017 co-relation queries the response was YES. [2022-12-13 17:46:19,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551820 conditions, 27618 events. 13740/27618 cut-off events. For 21261017/21261017 co-relation queries the response was YES. Maximal size of possible extension queue 2095. Compared 283243 event pairs, 1305 based on Foata normal form. 664/28282 useless extension candidates. Maximal degree in co-relation 549763. Up to 7047 conditions per place. [2022-12-13 17:46:20,187 INFO L137 encePairwiseOnDemand]: 154/159 looper letters, 2518 selfloop transitions, 2362 changer transitions 93/4973 dead transitions. [2022-12-13 17:46:20,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 894 places, 4973 transitions, 169493 flow [2022-12-13 17:46:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 17:46:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-13 17:46:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5486 transitions. [2022-12-13 17:46:20,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.460041928721174 [2022-12-13 17:46:20,193 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5486 transitions. [2022-12-13 17:46:20,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5486 transitions. [2022-12-13 17:46:20,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:20,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5486 transitions. [2022-12-13 17:46:20,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 73.14666666666666) internal successors, (5486), 75 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:20,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 159.0) internal successors, (12084), 76 states have internal predecessors, (12084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:20,207 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 159.0) internal successors, (12084), 76 states have internal predecessors, (12084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:20,207 INFO L175 Difference]: Start difference. First operand has 820 places, 3714 transitions, 123911 flow. Second operand 75 states and 5486 transitions. [2022-12-13 17:46:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 894 places, 4973 transitions, 169493 flow