./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/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_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/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_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --- 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 17:44:35,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:44:35,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:44:35,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:44:35,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:44:35,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:44:35,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:44:35,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:44:35,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:44:35,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:44:35,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:44:35,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:44:35,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:44:35,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:44:35,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:44:35,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:44:35,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:44:35,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:44:35,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:44:35,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:44:35,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:44:35,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:44:35,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:44:35,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:44:35,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:44:35,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:44:35,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:44:35,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:44:35,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:44:35,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:44:35,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:44:35,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:44:35,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:44:35,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:44:35,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:44:35,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:44:35,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:44:35,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:44:35,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:44:35,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:44:35,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:44:35,913 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:44:35,933 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:44:35,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:44:35,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:44:35,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:44:35,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:44:35,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:44:35,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:44:35,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:44:35,935 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:44:35,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:44:35,935 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:44:35,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:44:35,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:44:35,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:44:35,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:44:35,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:44:35,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:44:35,936 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:44:35,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:44:35,937 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:44:35,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:44:35,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:44:35,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:44:35,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:44:35,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:35,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:44:35,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:44:35,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:44:35,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:44:35,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:44:35,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:44:35,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:44:35,939 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:44:35,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:44:35,940 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:44:35,940 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_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 [2022-12-13 17:44:36,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:44:36,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:44:36,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:44:36,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:44:36,132 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:44:36,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2022-12-13 17:44:38,837 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:44:39,016 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:44:39,017 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2022-12-13 17:44:39,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/data/f80d0155f/e5828fd5250b4030bff1c1a96f6a30c4/FLAG209f7b227 [2022-12-13 17:44:39,032 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/data/f80d0155f/e5828fd5250b4030bff1c1a96f6a30c4 [2022-12-13 17:44:39,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:44:39,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:44:39,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:39,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:44:39,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:44:39,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cd2f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39, skipping insertion in model container [2022-12-13 17:44:39,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:44:39,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:44:39,218 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_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/sv-benchmarks/c/weaver/chl-word-trans.wvr.c[3292,3305] [2022-12-13 17:44:39,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:39,235 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:44:39,260 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_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/sv-benchmarks/c/weaver/chl-word-trans.wvr.c[3292,3305] [2022-12-13 17:44:39,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:39,278 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:44:39,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39 WrapperNode [2022-12-13 17:44:39,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:39,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:44:39,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:44:39,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:44:39,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,316 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 172 [2022-12-13 17:44:39,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:44:39,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:44:39,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:44:39,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:44:39,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,346 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:44:39,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:44:39,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:44:39,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:44:39,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:39,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:44:39,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:44:39,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:44:39,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:44:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:44:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:44:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:44:39,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:44:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:44:39,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:44:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 17:44:39,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 17:44:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:44:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:44:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:44:39,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:44:39,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:44:39,420 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 17:44:39,504 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:44:39,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:44:39,834 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:44:39,852 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:44:39,852 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 17:44:39,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:44:39 BoogieIcfgContainer [2022-12-13 17:44:39,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:44:39,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:44:39,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:44:39,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:44:39,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:44:39" (1/3) ... [2022-12-13 17:44:39,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5219cbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:44:39, skipping insertion in model container [2022-12-13 17:44:39,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:39" (2/3) ... [2022-12-13 17:44:39,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5219cbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:44:39, skipping insertion in model container [2022-12-13 17:44:39,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:44:39" (3/3) ... [2022-12-13 17:44:39,860 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2022-12-13 17:44:39,866 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:44:39,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:44:39,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:44:39,874 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:44:39,934 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:44:39,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 302 transitions, 628 flow [2022-12-13 17:44:40,031 INFO L130 PetriNetUnfolder]: 28/299 cut-off events. [2022-12-13 17:44:40,032 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:44:40,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 299 events. 28/299 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 369 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-12-13 17:44:40,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 284 places, 302 transitions, 628 flow [2022-12-13 17:44:40,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 288 transitions, 594 flow [2022-12-13 17:44:40,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:44:40,051 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 288 transitions, 594 flow [2022-12-13 17:44:40,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 288 transitions, 594 flow [2022-12-13 17:44:40,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 594 flow [2022-12-13 17:44:40,097 INFO L130 PetriNetUnfolder]: 28/288 cut-off events. [2022-12-13 17:44:40,098 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:44:40,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 288 events. 28/288 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 368 event pairs, 0 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-12-13 17:44:40,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2022-12-13 17:44:47,858 INFO L134 LiptonReduction]: Checked pairs total: 10120 [2022-12-13 17:44:47,858 INFO L136 LiptonReduction]: Total number of compositions: 308 [2022-12-13 17:44:47,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:44:47,878 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;@21b97dd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:44:47,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 17:44:47,887 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2022-12-13 17:44:47,887 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:44:47,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:47,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:47,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1119809441, now seen corresponding path program 1 times [2022-12-13 17:44:47,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:47,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558993722] [2022-12-13 17:44:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:48,381 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 17:44:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558993722] [2022-12-13 17:44:48,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558993722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:48,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:48,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:48,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822621016] [2022-12-13 17:44:48,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:48,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:48,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 17:44:48,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:48,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 17:44:48,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:48,806 INFO L130 PetriNetUnfolder]: 1057/1466 cut-off events. [2022-12-13 17:44:48,806 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2022-12-13 17:44:48,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 1466 events. 1057/1466 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5165 event pairs, 481 based on Foata normal form. 1/940 useless extension candidates. Maximal degree in co-relation 2574. Up to 1157 conditions per place. [2022-12-13 17:44:48,814 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 74 selfloop transitions, 4 changer transitions 2/81 dead transitions. [2022-12-13 17:44:48,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 81 transitions, 373 flow [2022-12-13 17:44:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1391 transitions. [2022-12-13 17:44:48,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4560655737704918 [2022-12-13 17:44:48,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1391 transitions. [2022-12-13 17:44:48,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1391 transitions. [2022-12-13 17:44:48,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:48,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1391 transitions. [2022-12-13 17:44:48,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,862 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 5 states and 1391 transitions. [2022-12-13 17:44:48,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 81 transitions, 373 flow [2022-12-13 17:44:48,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 81 transitions, 339 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 17:44:48,870 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 115 flow [2022-12-13 17:44:48,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2022-12-13 17:44:48,875 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2022-12-13 17:44:48,875 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 115 flow [2022-12-13 17:44:48,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:48,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:48,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:44:48,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash -845475491, now seen corresponding path program 2 times [2022-12-13 17:44:48,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:48,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210320215] [2022-12-13 17:44:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:49,072 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 17:44:49,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:49,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210320215] [2022-12-13 17:44:49,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210320215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:49,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:49,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:49,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973838746] [2022-12-13 17:44:49,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:49,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:49,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 610 [2022-12-13 17:44:49,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 264.8) internal successors, (1324), 5 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:49,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 610 [2022-12-13 17:44:49,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:49,474 INFO L130 PetriNetUnfolder]: 1412/2021 cut-off events. [2022-12-13 17:44:49,474 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2022-12-13 17:44:49,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4638 conditions, 2021 events. 1412/2021 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8279 event pairs, 595 based on Foata normal form. 1/1617 useless extension candidates. Maximal degree in co-relation 4037. Up to 1333 conditions per place. [2022-12-13 17:44:49,482 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 79 selfloop transitions, 12 changer transitions 1/93 dead transitions. [2022-12-13 17:44:49,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 93 transitions, 432 flow [2022-12-13 17:44:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1395 transitions. [2022-12-13 17:44:49,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45737704918032784 [2022-12-13 17:44:49,485 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1395 transitions. [2022-12-13 17:44:49,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1395 transitions. [2022-12-13 17:44:49,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:49,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1395 transitions. [2022-12-13 17:44:49,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,492 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,492 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 115 flow. Second operand 5 states and 1395 transitions. [2022-12-13 17:44:49,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 93 transitions, 432 flow [2022-12-13 17:44:49,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 93 transitions, 423 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:49,499 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 202 flow [2022-12-13 17:44:49,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2022-12-13 17:44:49,499 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2022-12-13 17:44:49,500 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 202 flow [2022-12-13 17:44:49,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 264.8) internal successors, (1324), 5 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:49,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:49,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:44:49,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:49,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1747352603, now seen corresponding path program 3 times [2022-12-13 17:44:49,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:49,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67400509] [2022-12-13 17:44:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:49,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:49,700 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 17:44:49,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:49,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67400509] [2022-12-13 17:44:49,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67400509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:49,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:49,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:49,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527469594] [2022-12-13 17:44:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:49,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:49,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:49,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 17:44:49,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:49,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 17:44:49,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:50,172 INFO L130 PetriNetUnfolder]: 1649/2445 cut-off events. [2022-12-13 17:44:50,173 INFO L131 PetriNetUnfolder]: For 1963/1963 co-relation queries the response was YES. [2022-12-13 17:44:50,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6679 conditions, 2445 events. 1649/2445 cut-off events. For 1963/1963 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11230 event pairs, 481 based on Foata normal form. 1/2079 useless extension candidates. Maximal degree in co-relation 4919. Up to 1117 conditions per place. [2022-12-13 17:44:50,187 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 83 selfloop transitions, 17 changer transitions 1/102 dead transitions. [2022-12-13 17:44:50,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 102 transitions, 569 flow [2022-12-13 17:44:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1400 transitions. [2022-12-13 17:44:50,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45901639344262296 [2022-12-13 17:44:50,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1400 transitions. [2022-12-13 17:44:50,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1400 transitions. [2022-12-13 17:44:50,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:50,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1400 transitions. [2022-12-13 17:44:50,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,203 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 202 flow. Second operand 5 states and 1400 transitions. [2022-12-13 17:44:50,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 102 transitions, 569 flow [2022-12-13 17:44:50,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 102 transitions, 559 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:50,214 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 313 flow [2022-12-13 17:44:50,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2022-12-13 17:44:50,215 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2022-12-13 17:44:50,215 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 313 flow [2022-12-13 17:44:50,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:50,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:50,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:44:50,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1349965211, now seen corresponding path program 4 times [2022-12-13 17:44:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:50,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516589956] [2022-12-13 17:44:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:50,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:50,429 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 17:44:50,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516589956] [2022-12-13 17:44:50,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516589956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:50,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:50,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:50,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632253266] [2022-12-13 17:44:50,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:50,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:50,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:50,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 17:44:50,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 313 flow. Second operand has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:50,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 17:44:50,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:50,900 INFO L130 PetriNetUnfolder]: 1649/2416 cut-off events. [2022-12-13 17:44:50,901 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2022-12-13 17:44:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7571 conditions, 2416 events. 1649/2416 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10605 event pairs, 823 based on Foata normal form. 1/2046 useless extension candidates. Maximal degree in co-relation 6084. Up to 1571 conditions per place. [2022-12-13 17:44:50,910 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 87 selfloop transitions, 9 changer transitions 2/99 dead transitions. [2022-12-13 17:44:50,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 672 flow [2022-12-13 17:44:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1392 transitions. [2022-12-13 17:44:50,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45639344262295084 [2022-12-13 17:44:50,913 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1392 transitions. [2022-12-13 17:44:50,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1392 transitions. [2022-12-13 17:44:50,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:50,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1392 transitions. [2022-12-13 17:44:50,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.4) internal successors, (1392), 5 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,919 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,920 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 313 flow. Second operand 5 states and 1392 transitions. [2022-12-13 17:44:50,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 672 flow [2022-12-13 17:44:50,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 630 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:50,933 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 352 flow [2022-12-13 17:44:50,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2022-12-13 17:44:50,934 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2022-12-13 17:44:50,934 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 352 flow [2022-12-13 17:44:50,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:50,935 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:50,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:44:50,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1180294345, now seen corresponding path program 5 times [2022-12-13 17:44:50,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050904180] [2022-12-13 17:44:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:50,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:51,093 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 17:44:51,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050904180] [2022-12-13 17:44:51,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050904180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:51,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:51,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283071361] [2022-12-13 17:44:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:51,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:51,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:51,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 610 [2022-12-13 17:44:51,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 264.8) internal successors, (1324), 5 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:51,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 610 [2022-12-13 17:44:51,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:51,655 INFO L130 PetriNetUnfolder]: 1738/2564 cut-off events. [2022-12-13 17:44:51,656 INFO L131 PetriNetUnfolder]: For 4129/4129 co-relation queries the response was YES. [2022-12-13 17:44:51,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 2564 events. 1738/2564 cut-off events. For 4129/4129 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11645 event pairs, 819 based on Foata normal form. 1/2181 useless extension candidates. Maximal degree in co-relation 7497. Up to 1937 conditions per place. [2022-12-13 17:44:51,667 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 97 selfloop transitions, 17 changer transitions 1/116 dead transitions. [2022-12-13 17:44:51,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 116 transitions, 769 flow [2022-12-13 17:44:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1396 transitions. [2022-12-13 17:44:51,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4577049180327869 [2022-12-13 17:44:51,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1396 transitions. [2022-12-13 17:44:51,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1396 transitions. [2022-12-13 17:44:51,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:51,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1396 transitions. [2022-12-13 17:44:51,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,678 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 352 flow. Second operand 5 states and 1396 transitions. [2022-12-13 17:44:51,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 116 transitions, 769 flow [2022-12-13 17:44:51,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 754 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:51,692 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 480 flow [2022-12-13 17:44:51,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2022-12-13 17:44:51,693 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2022-12-13 17:44:51,693 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 480 flow [2022-12-13 17:44:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 264.8) internal successors, (1324), 5 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:51,694 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:44:51,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1784220655, now seen corresponding path program 6 times [2022-12-13 17:44:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:51,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120422963] [2022-12-13 17:44:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:51,838 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 17:44:51,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:51,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120422963] [2022-12-13 17:44:51,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120422963] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:51,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:51,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:51,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79702023] [2022-12-13 17:44:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:51,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:51,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:51,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:51,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 17:44:51,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:51,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 17:44:51,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:52,345 INFO L130 PetriNetUnfolder]: 1770/2613 cut-off events. [2022-12-13 17:44:52,345 INFO L131 PetriNetUnfolder]: For 5646/5646 co-relation queries the response was YES. [2022-12-13 17:44:52,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8796 conditions, 2613 events. 1770/2613 cut-off events. For 5646/5646 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12015 event pairs, 477 based on Foata normal form. 1/2303 useless extension candidates. Maximal degree in co-relation 8494. Up to 1219 conditions per place. [2022-12-13 17:44:52,357 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 92 selfloop transitions, 30 changer transitions 1/124 dead transitions. [2022-12-13 17:44:52,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 124 transitions, 928 flow [2022-12-13 17:44:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1402 transitions. [2022-12-13 17:44:52,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45967213114754096 [2022-12-13 17:44:52,359 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1402 transitions. [2022-12-13 17:44:52,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1402 transitions. [2022-12-13 17:44:52,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:52,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1402 transitions. [2022-12-13 17:44:52,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,364 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 480 flow. Second operand 5 states and 1402 transitions. [2022-12-13 17:44:52,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 124 transitions, 928 flow [2022-12-13 17:44:52,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 124 transitions, 917 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:52,379 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 645 flow [2022-12-13 17:44:52,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=645, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2022-12-13 17:44:52,380 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2022-12-13 17:44:52,380 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 645 flow [2022-12-13 17:44:52,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:52,383 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:52,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:44:52,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:52,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1350043919, now seen corresponding path program 1 times [2022-12-13 17:44:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:52,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877504836] [2022-12-13 17:44:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:52,604 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 17:44:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877504836] [2022-12-13 17:44:52,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877504836] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:52,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:52,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:44:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21907797] [2022-12-13 17:44:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:52,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:52,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:44:52,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 645 flow. Second operand has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:52,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:44:52,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:53,390 INFO L130 PetriNetUnfolder]: 4143/5882 cut-off events. [2022-12-13 17:44:53,390 INFO L131 PetriNetUnfolder]: For 19284/19284 co-relation queries the response was YES. [2022-12-13 17:44:53,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22054 conditions, 5882 events. 4143/5882 cut-off events. For 19284/19284 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28518 event pairs, 1757 based on Foata normal form. 5/5126 useless extension candidates. Maximal degree in co-relation 21687. Up to 1743 conditions per place. [2022-12-13 17:44:53,411 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 155 selfloop transitions, 32 changer transitions 11/199 dead transitions. [2022-12-13 17:44:53,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 199 transitions, 1895 flow [2022-12-13 17:44:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:44:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:44:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1710 transitions. [2022-12-13 17:44:53,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4672131147540984 [2022-12-13 17:44:53,413 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1710 transitions. [2022-12-13 17:44:53,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1710 transitions. [2022-12-13 17:44:53,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:53,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1710 transitions. [2022-12-13 17:44:53,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,421 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,421 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 645 flow. Second operand 6 states and 1710 transitions. [2022-12-13 17:44:53,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 199 transitions, 1895 flow [2022-12-13 17:44:53,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 199 transitions, 1779 flow, removed 34 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:53,494 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 882 flow [2022-12-13 17:44:53,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=882, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2022-12-13 17:44:53,495 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2022-12-13 17:44:53,495 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 882 flow [2022-12-13 17:44:53,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:53,496 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:53,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:44:53,496 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2031921592, now seen corresponding path program 1 times [2022-12-13 17:44:53,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:53,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511546933] [2022-12-13 17:44:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:53,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:53,630 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 17:44:53,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:53,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511546933] [2022-12-13 17:44:53,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511546933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:53,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:53,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133727020] [2022-12-13 17:44:53,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:53,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:44:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:44:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:44:53,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:44:53,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 268.3333333333333) internal successors, (1610), 6 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:53,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:44:53,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:54,932 INFO L130 PetriNetUnfolder]: 7449/10444 cut-off events. [2022-12-13 17:44:54,932 INFO L131 PetriNetUnfolder]: For 30611/30611 co-relation queries the response was YES. [2022-12-13 17:44:54,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39401 conditions, 10444 events. 7449/10444 cut-off events. For 30611/30611 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 54336 event pairs, 2992 based on Foata normal form. 5/9030 useless extension candidates. Maximal degree in co-relation 38755. Up to 2747 conditions per place. [2022-12-13 17:44:54,983 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 182 selfloop transitions, 35 changer transitions 37/255 dead transitions. [2022-12-13 17:44:54,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 255 transitions, 2560 flow [2022-12-13 17:44:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:44:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:44:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1991 transitions. [2022-12-13 17:44:54,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46627634660421546 [2022-12-13 17:44:54,988 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1991 transitions. [2022-12-13 17:44:54,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1991 transitions. [2022-12-13 17:44:54,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:54,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1991 transitions. [2022-12-13 17:44:54,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 284.42857142857144) internal successors, (1991), 7 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:54,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,001 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,001 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 882 flow. Second operand 7 states and 1991 transitions. [2022-12-13 17:44:55,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 255 transitions, 2560 flow [2022-12-13 17:44:55,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 255 transitions, 2469 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 17:44:55,202 INFO L231 Difference]: Finished difference. Result has 83 places, 118 transitions, 1138 flow [2022-12-13 17:44:55,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1138, PETRI_PLACES=83, PETRI_TRANSITIONS=118} [2022-12-13 17:44:55,203 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2022-12-13 17:44:55,203 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 118 transitions, 1138 flow [2022-12-13 17:44:55,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 268.3333333333333) internal successors, (1610), 6 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:55,204 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:55,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:44:55,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2011861483, now seen corresponding path program 1 times [2022-12-13 17:44:55,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:55,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532150605] [2022-12-13 17:44:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:55,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:55,312 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 17:44:55,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532150605] [2022-12-13 17:44:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532150605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:55,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441262855] [2022-12-13 17:44:55,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:55,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:55,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:44:55,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 118 transitions, 1138 flow. Second operand has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:55,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:44:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:56,436 INFO L130 PetriNetUnfolder]: 6903/9804 cut-off events. [2022-12-13 17:44:56,436 INFO L131 PetriNetUnfolder]: For 31086/31086 co-relation queries the response was YES. [2022-12-13 17:44:56,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36748 conditions, 9804 events. 6903/9804 cut-off events. For 31086/31086 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 51205 event pairs, 2037 based on Foata normal form. 1/8467 useless extension candidates. Maximal degree in co-relation 36638. Up to 4775 conditions per place. [2022-12-13 17:44:56,475 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 172 selfloop transitions, 30 changer transitions 22/225 dead transitions. [2022-12-13 17:44:56,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 225 transitions, 2533 flow [2022-12-13 17:44:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1420 transitions. [2022-12-13 17:44:56,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46557377049180326 [2022-12-13 17:44:56,478 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1420 transitions. [2022-12-13 17:44:56,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1420 transitions. [2022-12-13 17:44:56,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:56,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1420 transitions. [2022-12-13 17:44:56,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,483 INFO L175 Difference]: Start difference. First operand has 83 places, 118 transitions, 1138 flow. Second operand 5 states and 1420 transitions. [2022-12-13 17:44:56,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 225 transitions, 2533 flow [2022-12-13 17:44:56,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 225 transitions, 2457 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 17:44:56,659 INFO L231 Difference]: Finished difference. Result has 87 places, 133 transitions, 1385 flow [2022-12-13 17:44:56,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1385, PETRI_PLACES=87, PETRI_TRANSITIONS=133} [2022-12-13 17:44:56,660 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2022-12-13 17:44:56,660 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 133 transitions, 1385 flow [2022-12-13 17:44:56,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:56,660 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:56,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:44:56,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:56,661 INFO L85 PathProgramCache]: Analyzing trace with hash -805367059, now seen corresponding path program 2 times [2022-12-13 17:44:56,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:56,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093724238] [2022-12-13 17:44:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:56,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:56,813 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 17:44:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093724238] [2022-12-13 17:44:56,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093724238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:56,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:56,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:56,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332581790] [2022-12-13 17:44:56,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:56,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:56,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:44:56,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 133 transitions, 1385 flow. Second operand has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:56,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:44:56,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:57,890 INFO L130 PetriNetUnfolder]: 6847/9697 cut-off events. [2022-12-13 17:44:57,890 INFO L131 PetriNetUnfolder]: For 49215/49215 co-relation queries the response was YES. [2022-12-13 17:44:57,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37064 conditions, 9697 events. 6847/9697 cut-off events. For 49215/49215 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 50597 event pairs, 2382 based on Foata normal form. 1/8756 useless extension candidates. Maximal degree in co-relation 36006. Up to 4231 conditions per place. [2022-12-13 17:44:57,926 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 145 selfloop transitions, 57 changer transitions 11/214 dead transitions. [2022-12-13 17:44:57,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 214 transitions, 2379 flow [2022-12-13 17:44:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:44:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:44:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1701 transitions. [2022-12-13 17:44:57,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46475409836065573 [2022-12-13 17:44:57,928 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1701 transitions. [2022-12-13 17:44:57,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1701 transitions. [2022-12-13 17:44:57,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:57,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1701 transitions. [2022-12-13 17:44:57,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.5) internal successors, (1701), 6 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:57,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:57,933 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:57,934 INFO L175 Difference]: Start difference. First operand has 87 places, 133 transitions, 1385 flow. Second operand 6 states and 1701 transitions. [2022-12-13 17:44:57,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 214 transitions, 2379 flow [2022-12-13 17:44:58,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 214 transitions, 2339 flow, removed 17 selfloop flow, removed 1 redundant places. [2022-12-13 17:44:58,058 INFO L231 Difference]: Finished difference. Result has 93 places, 157 transitions, 1843 flow [2022-12-13 17:44:58,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1843, PETRI_PLACES=93, PETRI_TRANSITIONS=157} [2022-12-13 17:44:58,059 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2022-12-13 17:44:58,059 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 157 transitions, 1843 flow [2022-12-13 17:44:58,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:58,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:58,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:44:58,059 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1483208415, now seen corresponding path program 3 times [2022-12-13 17:44:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604214911] [2022-12-13 17:44:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:58,177 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 17:44:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604214911] [2022-12-13 17:44:58,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604214911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:58,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:58,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931835285] [2022-12-13 17:44:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:44:58,221 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:44:58,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 157 transitions, 1843 flow. Second operand has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:58,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:58,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:44:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:59,647 INFO L130 PetriNetUnfolder]: 6874/9770 cut-off events. [2022-12-13 17:44:59,647 INFO L131 PetriNetUnfolder]: For 51414/51441 co-relation queries the response was YES. [2022-12-13 17:44:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40205 conditions, 9770 events. 6874/9770 cut-off events. For 51414/51441 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51208 event pairs, 3324 based on Foata normal form. 19/8826 useless extension candidates. Maximal degree in co-relation 40131. Up to 7380 conditions per place. [2022-12-13 17:44:59,686 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 153 selfloop transitions, 48 changer transitions 16/218 dead transitions. [2022-12-13 17:44:59,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 218 transitions, 2676 flow [2022-12-13 17:44:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:44:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:44:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1415 transitions. [2022-12-13 17:44:59,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4639344262295082 [2022-12-13 17:44:59,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1415 transitions. [2022-12-13 17:44:59,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1415 transitions. [2022-12-13 17:44:59,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:59,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1415 transitions. [2022-12-13 17:44:59,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,693 INFO L175 Difference]: Start difference. First operand has 93 places, 157 transitions, 1843 flow. Second operand 5 states and 1415 transitions. [2022-12-13 17:44:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 218 transitions, 2676 flow [2022-12-13 17:44:59,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 218 transitions, 2560 flow, removed 34 selfloop flow, removed 3 redundant places. [2022-12-13 17:44:59,838 INFO L231 Difference]: Finished difference. Result has 94 places, 160 transitions, 1839 flow [2022-12-13 17:44:59,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1839, PETRI_PLACES=94, PETRI_TRANSITIONS=160} [2022-12-13 17:44:59,838 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2022-12-13 17:44:59,838 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 160 transitions, 1839 flow [2022-12-13 17:44:59,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:59,839 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:59,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:44:59,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:44:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash 353856489, now seen corresponding path program 4 times [2022-12-13 17:44:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:59,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355564320] [2022-12-13 17:44:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:59,984 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 17:44:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355564320] [2022-12-13 17:44:59,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355564320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:59,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:59,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:44:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035885214] [2022-12-13 17:44:59,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:00,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:45:00,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 160 transitions, 1839 flow. Second operand has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:00,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:00,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:45:00,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:01,168 INFO L130 PetriNetUnfolder]: 6812/9655 cut-off events. [2022-12-13 17:45:01,168 INFO L131 PetriNetUnfolder]: For 47287/47341 co-relation queries the response was YES. [2022-12-13 17:45:01,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38479 conditions, 9655 events. 6812/9655 cut-off events. For 47287/47341 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 50378 event pairs, 2412 based on Foata normal form. 37/8738 useless extension candidates. Maximal degree in co-relation 37544. Up to 4231 conditions per place. [2022-12-13 17:45:01,207 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 157 selfloop transitions, 42 changer transitions 14/214 dead transitions. [2022-12-13 17:45:01,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 214 transitions, 2469 flow [2022-12-13 17:45:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1700 transitions. [2022-12-13 17:45:01,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644808743169399 [2022-12-13 17:45:01,209 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1700 transitions. [2022-12-13 17:45:01,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1700 transitions. [2022-12-13 17:45:01,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:01,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1700 transitions. [2022-12-13 17:45:01,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.3333333333333) internal successors, (1700), 6 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,214 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,214 INFO L175 Difference]: Start difference. First operand has 94 places, 160 transitions, 1839 flow. Second operand 6 states and 1700 transitions. [2022-12-13 17:45:01,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 214 transitions, 2469 flow [2022-12-13 17:45:01,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 214 transitions, 2389 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:01,355 INFO L231 Difference]: Finished difference. Result has 96 places, 155 transitions, 1760 flow [2022-12-13 17:45:01,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1760, PETRI_PLACES=96, PETRI_TRANSITIONS=155} [2022-12-13 17:45:01,356 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2022-12-13 17:45:01,356 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 155 transitions, 1760 flow [2022-12-13 17:45:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:01,357 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:01,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:45:01,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1744319519, now seen corresponding path program 5 times [2022-12-13 17:45:01,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:01,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810244454] [2022-12-13 17:45:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:01,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:01,460 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 17:45:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:01,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810244454] [2022-12-13 17:45:01,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810244454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:01,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:01,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262289787] [2022-12-13 17:45:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:01,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:45:01,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 155 transitions, 1760 flow. Second operand has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:01,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:45:01,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:02,583 INFO L130 PetriNetUnfolder]: 6832/9744 cut-off events. [2022-12-13 17:45:02,583 INFO L131 PetriNetUnfolder]: For 50274/50301 co-relation queries the response was YES. [2022-12-13 17:45:02,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39773 conditions, 9744 events. 6832/9744 cut-off events. For 50274/50301 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51418 event pairs, 1518 based on Foata normal form. 22/8824 useless extension candidates. Maximal degree in co-relation 39709. Up to 3155 conditions per place. [2022-12-13 17:45:02,624 INFO L137 encePairwiseOnDemand]: 600/610 looper letters, 186 selfloop transitions, 91 changer transitions 10/288 dead transitions. [2022-12-13 17:45:02,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 288 transitions, 3371 flow [2022-12-13 17:45:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:45:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:45:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1994 transitions. [2022-12-13 17:45:02,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4669789227166276 [2022-12-13 17:45:02,627 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1994 transitions. [2022-12-13 17:45:02,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1994 transitions. [2022-12-13 17:45:02,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:02,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1994 transitions. [2022-12-13 17:45:02,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 284.85714285714283) internal successors, (1994), 7 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,632 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,632 INFO L175 Difference]: Start difference. First operand has 96 places, 155 transitions, 1760 flow. Second operand 7 states and 1994 transitions. [2022-12-13 17:45:02,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 288 transitions, 3371 flow [2022-12-13 17:45:02,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 288 transitions, 3258 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-12-13 17:45:02,781 INFO L231 Difference]: Finished difference. Result has 98 places, 196 transitions, 2485 flow [2022-12-13 17:45:02,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2485, PETRI_PLACES=98, PETRI_TRANSITIONS=196} [2022-12-13 17:45:02,782 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2022-12-13 17:45:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 196 transitions, 2485 flow [2022-12-13 17:45:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:02,782 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:02,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:45:02,782 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1259087039, now seen corresponding path program 6 times [2022-12-13 17:45:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457020820] [2022-12-13 17:45:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:02,918 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 17:45:02,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457020820] [2022-12-13 17:45:02,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457020820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:02,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:02,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215769639] [2022-12-13 17:45:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:02,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:02,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:02,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:02,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 196 transitions, 2485 flow. Second operand has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:02,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:02,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:04,554 INFO L130 PetriNetUnfolder]: 6830/9752 cut-off events. [2022-12-13 17:45:04,554 INFO L131 PetriNetUnfolder]: For 60857/61061 co-relation queries the response was YES. [2022-12-13 17:45:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42073 conditions, 9752 events. 6830/9752 cut-off events. For 60857/61061 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51702 event pairs, 2806 based on Foata normal form. 46/8850 useless extension candidates. Maximal degree in co-relation 40590. Up to 5935 conditions per place. [2022-12-13 17:45:04,615 INFO L137 encePairwiseOnDemand]: 600/610 looper letters, 177 selfloop transitions, 92 changer transitions 12/282 dead transitions. [2022-12-13 17:45:04,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 282 transitions, 3464 flow [2022-12-13 17:45:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:45:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:45:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1980 transitions. [2022-12-13 17:45:04,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4637002341920375 [2022-12-13 17:45:04,619 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1980 transitions. [2022-12-13 17:45:04,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1980 transitions. [2022-12-13 17:45:04,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:04,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1980 transitions. [2022-12-13 17:45:04,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 282.85714285714283) internal successors, (1980), 7 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,626 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,626 INFO L175 Difference]: Start difference. First operand has 98 places, 196 transitions, 2485 flow. Second operand 7 states and 1980 transitions. [2022-12-13 17:45:04,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 282 transitions, 3464 flow [2022-12-13 17:45:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 282 transitions, 3330 flow, removed 67 selfloop flow, removed 0 redundant places. [2022-12-13 17:45:04,808 INFO L231 Difference]: Finished difference. Result has 106 places, 199 transitions, 2520 flow [2022-12-13 17:45:04,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2520, PETRI_PLACES=106, PETRI_TRANSITIONS=199} [2022-12-13 17:45:04,809 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2022-12-13 17:45:04,809 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 199 transitions, 2520 flow [2022-12-13 17:45:04,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:04,809 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:04,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:45:04,810 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:04,810 INFO L85 PathProgramCache]: Analyzing trace with hash -382770727, now seen corresponding path program 1 times [2022-12-13 17:45:04,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:04,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749255616] [2022-12-13 17:45:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:04,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:04,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749255616] [2022-12-13 17:45:04,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749255616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:04,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:04,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202429887] [2022-12-13 17:45:04,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:04,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:04,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:04,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 199 transitions, 2520 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:04,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:04,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:06,178 INFO L130 PetriNetUnfolder]: 7189/10355 cut-off events. [2022-12-13 17:45:06,178 INFO L131 PetriNetUnfolder]: For 72135/72300 co-relation queries the response was YES. [2022-12-13 17:45:06,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45449 conditions, 10355 events. 7189/10355 cut-off events. For 72135/72300 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 56430 event pairs, 3314 based on Foata normal form. 28/9381 useless extension candidates. Maximal degree in co-relation 43847. Up to 7528 conditions per place. [2022-12-13 17:45:06,222 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 219 selfloop transitions, 34 changer transitions 6/260 dead transitions. [2022-12-13 17:45:06,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 260 transitions, 3467 flow [2022-12-13 17:45:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1416 transitions. [2022-12-13 17:45:06,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4642622950819672 [2022-12-13 17:45:06,224 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1416 transitions. [2022-12-13 17:45:06,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1416 transitions. [2022-12-13 17:45:06,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:06,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1416 transitions. [2022-12-13 17:45:06,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.2) internal successors, (1416), 5 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,228 INFO L175 Difference]: Start difference. First operand has 106 places, 199 transitions, 2520 flow. Second operand 5 states and 1416 transitions. [2022-12-13 17:45:06,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 260 transitions, 3467 flow [2022-12-13 17:45:06,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 260 transitions, 3263 flow, removed 37 selfloop flow, removed 3 redundant places. [2022-12-13 17:45:06,355 INFO L231 Difference]: Finished difference. Result has 108 places, 203 transitions, 2517 flow [2022-12-13 17:45:06,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2517, PETRI_PLACES=108, PETRI_TRANSITIONS=203} [2022-12-13 17:45:06,355 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2022-12-13 17:45:06,355 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 203 transitions, 2517 flow [2022-12-13 17:45:06,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:06,356 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:06,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 17:45:06,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1482851041, now seen corresponding path program 2 times [2022-12-13 17:45:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655696859] [2022-12-13 17:45:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:06,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655696859] [2022-12-13 17:45:06,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655696859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:06,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:06,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768125714] [2022-12-13 17:45:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:06,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:45:06,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 203 transitions, 2517 flow. Second operand has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:06,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:45:06,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:07,941 INFO L130 PetriNetUnfolder]: 7105/10482 cut-off events. [2022-12-13 17:45:07,941 INFO L131 PetriNetUnfolder]: For 77239/77263 co-relation queries the response was YES. [2022-12-13 17:45:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44326 conditions, 10482 events. 7105/10482 cut-off events. For 77239/77263 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 61678 event pairs, 957 based on Foata normal form. 25/9583 useless extension candidates. Maximal degree in co-relation 42807. Up to 6227 conditions per place. [2022-12-13 17:45:08,027 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 249 selfloop transitions, 35 changer transitions 6/291 dead transitions. [2022-12-13 17:45:08,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 291 transitions, 3934 flow [2022-12-13 17:45:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1421 transitions. [2022-12-13 17:45:08,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4659016393442623 [2022-12-13 17:45:08,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1421 transitions. [2022-12-13 17:45:08,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1421 transitions. [2022-12-13 17:45:08,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:08,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1421 transitions. [2022-12-13 17:45:08,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.2) internal successors, (1421), 5 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,033 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,033 INFO L175 Difference]: Start difference. First operand has 108 places, 203 transitions, 2517 flow. Second operand 5 states and 1421 transitions. [2022-12-13 17:45:08,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 291 transitions, 3934 flow [2022-12-13 17:45:08,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 291 transitions, 3892 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:08,142 INFO L231 Difference]: Finished difference. Result has 114 places, 217 transitions, 2895 flow [2022-12-13 17:45:08,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2895, PETRI_PLACES=114, PETRI_TRANSITIONS=217} [2022-12-13 17:45:08,143 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 76 predicate places. [2022-12-13 17:45:08,143 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 217 transitions, 2895 flow [2022-12-13 17:45:08,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:08,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:08,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:45:08,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 977317485, now seen corresponding path program 3 times [2022-12-13 17:45:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:08,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27868851] [2022-12-13 17:45:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27868851] [2022-12-13 17:45:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27868851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:08,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:08,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:08,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614031230] [2022-12-13 17:45:08,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:08,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:08,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:08,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 217 transitions, 2895 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:08,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:08,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:09,449 INFO L130 PetriNetUnfolder]: 7021/10074 cut-off events. [2022-12-13 17:45:09,449 INFO L131 PetriNetUnfolder]: For 81686/81923 co-relation queries the response was YES. [2022-12-13 17:45:09,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44660 conditions, 10074 events. 7021/10074 cut-off events. For 81686/81923 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 54050 event pairs, 1773 based on Foata normal form. 103/9235 useless extension candidates. Maximal degree in co-relation 43138. Up to 3942 conditions per place. [2022-12-13 17:45:09,503 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 215 selfloop transitions, 75 changer transitions 7/298 dead transitions. [2022-12-13 17:45:09,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 298 transitions, 4037 flow [2022-12-13 17:45:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1700 transitions. [2022-12-13 17:45:09,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644808743169399 [2022-12-13 17:45:09,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1700 transitions. [2022-12-13 17:45:09,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1700 transitions. [2022-12-13 17:45:09,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:09,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1700 transitions. [2022-12-13 17:45:09,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.3333333333333) internal successors, (1700), 6 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,510 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,510 INFO L175 Difference]: Start difference. First operand has 114 places, 217 transitions, 2895 flow. Second operand 6 states and 1700 transitions. [2022-12-13 17:45:09,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 298 transitions, 4037 flow [2022-12-13 17:45:09,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 298 transitions, 3970 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:09,697 INFO L231 Difference]: Finished difference. Result has 119 places, 229 transitions, 3218 flow [2022-12-13 17:45:09,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3218, PETRI_PLACES=119, PETRI_TRANSITIONS=229} [2022-12-13 17:45:09,697 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2022-12-13 17:45:09,697 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 229 transitions, 3218 flow [2022-12-13 17:45:09,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:09,698 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:09,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 17:45:09,698 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1580412525, now seen corresponding path program 4 times [2022-12-13 17:45:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:09,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802956933] [2022-12-13 17:45:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:09,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:09,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802956933] [2022-12-13 17:45:09,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802956933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:09,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:09,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725186461] [2022-12-13 17:45:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:09,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:09,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:09,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:09,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 229 transitions, 3218 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:09,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:11,425 INFO L130 PetriNetUnfolder]: 8626/12823 cut-off events. [2022-12-13 17:45:11,425 INFO L131 PetriNetUnfolder]: For 108959/108995 co-relation queries the response was YES. [2022-12-13 17:45:11,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58430 conditions, 12823 events. 8626/12823 cut-off events. For 108959/108995 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 78801 event pairs, 603 based on Foata normal form. 13/11636 useless extension candidates. Maximal degree in co-relation 57262. Up to 4906 conditions per place. [2022-12-13 17:45:11,501 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 364 selfloop transitions, 46 changer transitions 11/422 dead transitions. [2022-12-13 17:45:11,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 422 transitions, 6313 flow [2022-12-13 17:45:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1712 transitions. [2022-12-13 17:45:11,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46775956284153003 [2022-12-13 17:45:11,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1712 transitions. [2022-12-13 17:45:11,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1712 transitions. [2022-12-13 17:45:11,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:11,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1712 transitions. [2022-12-13 17:45:11,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.3333333333333) internal successors, (1712), 6 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,509 INFO L175 Difference]: Start difference. First operand has 119 places, 229 transitions, 3218 flow. Second operand 6 states and 1712 transitions. [2022-12-13 17:45:11,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 422 transitions, 6313 flow [2022-12-13 17:45:11,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 422 transitions, 6150 flow, removed 22 selfloop flow, removed 3 redundant places. [2022-12-13 17:45:11,714 INFO L231 Difference]: Finished difference. Result has 125 places, 250 transitions, 3648 flow [2022-12-13 17:45:11,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3648, PETRI_PLACES=125, PETRI_TRANSITIONS=250} [2022-12-13 17:45:11,714 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2022-12-13 17:45:11,714 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 250 transitions, 3648 flow [2022-12-13 17:45:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:11,715 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:11,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 17:45:11,715 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash 30251195, now seen corresponding path program 5 times [2022-12-13 17:45:11,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:11,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808456869] [2022-12-13 17:45:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:11,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808456869] [2022-12-13 17:45:11,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808456869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:11,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:11,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429096684] [2022-12-13 17:45:11,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:11,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:11,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:11,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 250 transitions, 3648 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:11,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:11,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:13,505 INFO L130 PetriNetUnfolder]: 8938/13144 cut-off events. [2022-12-13 17:45:13,505 INFO L131 PetriNetUnfolder]: For 122387/122507 co-relation queries the response was YES. [2022-12-13 17:45:13,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61979 conditions, 13144 events. 8938/13144 cut-off events. For 122387/122507 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 78288 event pairs, 1162 based on Foata normal form. 103/11912 useless extension candidates. Maximal degree in co-relation 60107. Up to 4132 conditions per place. [2022-12-13 17:45:13,583 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 341 selfloop transitions, 67 changer transitions 11/420 dead transitions. [2022-12-13 17:45:13,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 420 transitions, 6183 flow [2022-12-13 17:45:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1714 transitions. [2022-12-13 17:45:13,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46830601092896174 [2022-12-13 17:45:13,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1714 transitions. [2022-12-13 17:45:13,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1714 transitions. [2022-12-13 17:45:13,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:13,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1714 transitions. [2022-12-13 17:45:13,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.6666666666667) internal successors, (1714), 6 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,589 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,589 INFO L175 Difference]: Start difference. First operand has 125 places, 250 transitions, 3648 flow. Second operand 6 states and 1714 transitions. [2022-12-13 17:45:13,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 420 transitions, 6183 flow [2022-12-13 17:45:14,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 420 transitions, 6133 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-13 17:45:14,026 INFO L231 Difference]: Finished difference. Result has 133 places, 254 transitions, 3855 flow [2022-12-13 17:45:14,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3855, PETRI_PLACES=133, PETRI_TRANSITIONS=254} [2022-12-13 17:45:14,026 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 95 predicate places. [2022-12-13 17:45:14,026 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 254 transitions, 3855 flow [2022-12-13 17:45:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:14,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:14,026 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 17:45:14,027 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1129561203, now seen corresponding path program 6 times [2022-12-13 17:45:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:14,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448464418] [2022-12-13 17:45:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:14,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448464418] [2022-12-13 17:45:14,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448464418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:14,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:14,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503611341] [2022-12-13 17:45:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:14,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:45:14,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 254 transitions, 3855 flow. Second operand has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:14,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:14,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:45:14,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:15,814 INFO L130 PetriNetUnfolder]: 8854/13028 cut-off events. [2022-12-13 17:45:15,814 INFO L131 PetriNetUnfolder]: For 125045/125141 co-relation queries the response was YES. [2022-12-13 17:45:15,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62487 conditions, 13028 events. 8854/13028 cut-off events. For 125045/125141 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 77110 event pairs, 2023 based on Foata normal form. 55/11766 useless extension candidates. Maximal degree in co-relation 61053. Up to 6215 conditions per place. [2022-12-13 17:45:15,920 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 247 selfloop transitions, 63 changer transitions 9/320 dead transitions. [2022-12-13 17:45:15,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 320 transitions, 4997 flow [2022-12-13 17:45:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1417 transitions. [2022-12-13 17:45:15,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4645901639344262 [2022-12-13 17:45:15,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1417 transitions. [2022-12-13 17:45:15,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1417 transitions. [2022-12-13 17:45:15,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:15,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1417 transitions. [2022-12-13 17:45:15,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.4) internal successors, (1417), 5 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:15,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:15,926 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:15,926 INFO L175 Difference]: Start difference. First operand has 133 places, 254 transitions, 3855 flow. Second operand 5 states and 1417 transitions. [2022-12-13 17:45:15,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 320 transitions, 4997 flow [2022-12-13 17:45:16,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 320 transitions, 4940 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:16,433 INFO L231 Difference]: Finished difference. Result has 137 places, 246 transitions, 3812 flow [2022-12-13 17:45:16,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3812, PETRI_PLACES=137, PETRI_TRANSITIONS=246} [2022-12-13 17:45:16,434 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 99 predicate places. [2022-12-13 17:45:16,434 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 246 transitions, 3812 flow [2022-12-13 17:45:16,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:16,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:16,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 17:45:16,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2020090268, now seen corresponding path program 1 times [2022-12-13 17:45:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050453359] [2022-12-13 17:45:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050453359] [2022-12-13 17:45:16,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050453359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:16,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:16,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358639933] [2022-12-13 17:45:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:16,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:45:16,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 246 transitions, 3812 flow. Second operand has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:16,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:16,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:45:16,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:18,448 INFO L130 PetriNetUnfolder]: 9027/13310 cut-off events. [2022-12-13 17:45:18,448 INFO L131 PetriNetUnfolder]: For 135429/135453 co-relation queries the response was YES. [2022-12-13 17:45:18,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64408 conditions, 13310 events. 9027/13310 cut-off events. For 135429/135453 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 79746 event pairs, 2641 based on Foata normal form. 1/11997 useless extension candidates. Maximal degree in co-relation 63480. Up to 8524 conditions per place. [2022-12-13 17:45:18,535 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 284 selfloop transitions, 38 changer transitions 7/330 dead transitions. [2022-12-13 17:45:18,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 330 transitions, 5320 flow [2022-12-13 17:45:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1424 transitions. [2022-12-13 17:45:18,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4668852459016393 [2022-12-13 17:45:18,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1424 transitions. [2022-12-13 17:45:18,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1424 transitions. [2022-12-13 17:45:18,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:18,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1424 transitions. [2022-12-13 17:45:18,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.8) internal successors, (1424), 5 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:18,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:18,540 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:18,540 INFO L175 Difference]: Start difference. First operand has 137 places, 246 transitions, 3812 flow. Second operand 5 states and 1424 transitions. [2022-12-13 17:45:18,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 330 transitions, 5320 flow [2022-12-13 17:45:19,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 330 transitions, 5248 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:19,108 INFO L231 Difference]: Finished difference. Result has 142 places, 261 transitions, 4242 flow [2022-12-13 17:45:19,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4242, PETRI_PLACES=142, PETRI_TRANSITIONS=261} [2022-12-13 17:45:19,108 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2022-12-13 17:45:19,108 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 261 transitions, 4242 flow [2022-12-13 17:45:19,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:19,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:19,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 17:45:19,109 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 461426004, now seen corresponding path program 2 times [2022-12-13 17:45:19,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:19,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062898991] [2022-12-13 17:45:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:19,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062898991] [2022-12-13 17:45:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062898991] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:19,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:19,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594801797] [2022-12-13 17:45:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:19,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:19,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 261 transitions, 4242 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:19,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:19,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:19,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:21,142 INFO L130 PetriNetUnfolder]: 8989/13237 cut-off events. [2022-12-13 17:45:21,142 INFO L131 PetriNetUnfolder]: For 135405/135501 co-relation queries the response was YES. [2022-12-13 17:45:21,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64600 conditions, 13237 events. 8989/13237 cut-off events. For 135405/135501 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 78934 event pairs, 3696 based on Foata normal form. 1/11903 useless extension candidates. Maximal degree in co-relation 63034. Up to 10798 conditions per place. [2022-12-13 17:45:21,234 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 273 selfloop transitions, 46 changer transitions 7/327 dead transitions. [2022-12-13 17:45:21,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 327 transitions, 5418 flow [2022-12-13 17:45:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1417 transitions. [2022-12-13 17:45:21,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4645901639344262 [2022-12-13 17:45:21,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1417 transitions. [2022-12-13 17:45:21,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1417 transitions. [2022-12-13 17:45:21,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:21,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1417 transitions. [2022-12-13 17:45:21,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.4) internal successors, (1417), 5 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:21,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:21,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:21,243 INFO L175 Difference]: Start difference. First operand has 142 places, 261 transitions, 4242 flow. Second operand 5 states and 1417 transitions. [2022-12-13 17:45:21,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 327 transitions, 5418 flow [2022-12-13 17:45:21,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 327 transitions, 5392 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:21,934 INFO L231 Difference]: Finished difference. Result has 147 places, 261 transitions, 4357 flow [2022-12-13 17:45:21,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4357, PETRI_PLACES=147, PETRI_TRANSITIONS=261} [2022-12-13 17:45:21,934 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2022-12-13 17:45:21,934 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 261 transitions, 4357 flow [2022-12-13 17:45:21,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:21,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:21,935 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:21,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 17:45:21,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 223318774, now seen corresponding path program 3 times [2022-12-13 17:45:21,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:21,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124619672] [2022-12-13 17:45:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:21,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124619672] [2022-12-13 17:45:22,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124619672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:22,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:22,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473398941] [2022-12-13 17:45:22,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:22,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:22,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 261 transitions, 4357 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:22,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:22,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:24,253 INFO L130 PetriNetUnfolder]: 10727/15972 cut-off events. [2022-12-13 17:45:24,253 INFO L131 PetriNetUnfolder]: For 159814/159844 co-relation queries the response was YES. [2022-12-13 17:45:24,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75524 conditions, 15972 events. 10727/15972 cut-off events. For 159814/159844 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 101421 event pairs, 1115 based on Foata normal form. 7/14323 useless extension candidates. Maximal degree in co-relation 74354. Up to 6856 conditions per place. [2022-12-13 17:45:24,333 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 354 selfloop transitions, 56 changer transitions 11/422 dead transitions. [2022-12-13 17:45:24,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 422 transitions, 6962 flow [2022-12-13 17:45:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1711 transitions. [2022-12-13 17:45:24,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4674863387978142 [2022-12-13 17:45:24,336 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1711 transitions. [2022-12-13 17:45:24,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1711 transitions. [2022-12-13 17:45:24,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:24,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1711 transitions. [2022-12-13 17:45:24,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.1666666666667) internal successors, (1711), 6 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:24,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:24,343 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:24,343 INFO L175 Difference]: Start difference. First operand has 147 places, 261 transitions, 4357 flow. Second operand 6 states and 1711 transitions. [2022-12-13 17:45:24,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 422 transitions, 6962 flow [2022-12-13 17:45:24,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 422 transitions, 6861 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:24,958 INFO L231 Difference]: Finished difference. Result has 154 places, 278 transitions, 4872 flow [2022-12-13 17:45:24,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4872, PETRI_PLACES=154, PETRI_TRANSITIONS=278} [2022-12-13 17:45:24,958 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 116 predicate places. [2022-12-13 17:45:24,958 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 278 transitions, 4872 flow [2022-12-13 17:45:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:24,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:24,959 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:24,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 17:45:24,959 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1735974200, now seen corresponding path program 4 times [2022-12-13 17:45:24,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:24,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227046060] [2022-12-13 17:45:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:24,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:25,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227046060] [2022-12-13 17:45:25,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227046060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:25,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:25,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:25,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642138154] [2022-12-13 17:45:25,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:25,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:25,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 278 transitions, 4872 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:25,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:25,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:25,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:27,249 INFO L130 PetriNetUnfolder]: 10648/15792 cut-off events. [2022-12-13 17:45:27,250 INFO L131 PetriNetUnfolder]: For 170676/170700 co-relation queries the response was YES. [2022-12-13 17:45:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78020 conditions, 15792 events. 10648/15792 cut-off events. For 170676/170700 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 98391 event pairs, 4666 based on Foata normal form. 1/14098 useless extension candidates. Maximal degree in co-relation 76785. Up to 13316 conditions per place. [2022-12-13 17:45:27,351 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 264 selfloop transitions, 53 changer transitions 7/325 dead transitions. [2022-12-13 17:45:27,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 325 transitions, 5792 flow [2022-12-13 17:45:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1412 transitions. [2022-12-13 17:45:27,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46295081967213114 [2022-12-13 17:45:27,353 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1412 transitions. [2022-12-13 17:45:27,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1412 transitions. [2022-12-13 17:45:27,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:27,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1412 transitions. [2022-12-13 17:45:27,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.4) internal successors, (1412), 5 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:27,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:27,356 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:27,356 INFO L175 Difference]: Start difference. First operand has 154 places, 278 transitions, 4872 flow. Second operand 5 states and 1412 transitions. [2022-12-13 17:45:27,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 325 transitions, 5792 flow [2022-12-13 17:45:28,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 325 transitions, 5764 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-12-13 17:45:28,253 INFO L231 Difference]: Finished difference. Result has 159 places, 272 transitions, 4879 flow [2022-12-13 17:45:28,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4879, PETRI_PLACES=159, PETRI_TRANSITIONS=272} [2022-12-13 17:45:28,254 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 121 predicate places. [2022-12-13 17:45:28,254 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 272 transitions, 4879 flow [2022-12-13 17:45:28,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:28,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:28,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 17:45:28,254 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1930608276, now seen corresponding path program 5 times [2022-12-13 17:45:28,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:28,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336031886] [2022-12-13 17:45:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:28,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:28,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336031886] [2022-12-13 17:45:28,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336031886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:28,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:28,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:28,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582096890] [2022-12-13 17:45:28,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:28,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:28,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:28,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 17:45:28,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 272 transitions, 4879 flow. Second operand has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:28,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:28,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 17:45:28,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:30,722 INFO L130 PetriNetUnfolder]: 10620/15738 cut-off events. [2022-12-13 17:45:30,722 INFO L131 PetriNetUnfolder]: For 169269/169293 co-relation queries the response was YES. [2022-12-13 17:45:30,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77683 conditions, 15738 events. 10620/15738 cut-off events. For 169269/169293 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 97525 event pairs, 2970 based on Foata normal form. 7/14062 useless extension candidates. Maximal degree in co-relation 76750. Up to 8150 conditions per place. [2022-12-13 17:45:30,880 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 260 selfloop transitions, 77 changer transitions 9/347 dead transitions. [2022-12-13 17:45:30,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 347 transitions, 6158 flow [2022-12-13 17:45:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1421 transitions. [2022-12-13 17:45:30,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4659016393442623 [2022-12-13 17:45:30,883 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1421 transitions. [2022-12-13 17:45:30,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1421 transitions. [2022-12-13 17:45:30,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:30,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1421 transitions. [2022-12-13 17:45:30,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.2) internal successors, (1421), 5 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,889 INFO L175 Difference]: Start difference. First operand has 159 places, 272 transitions, 4879 flow. Second operand 5 states and 1421 transitions. [2022-12-13 17:45:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 347 transitions, 6158 flow [2022-12-13 17:45:31,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 347 transitions, 5928 flow, removed 5 selfloop flow, removed 7 redundant places. [2022-12-13 17:45:31,667 INFO L231 Difference]: Finished difference. Result has 157 places, 265 transitions, 4698 flow [2022-12-13 17:45:31,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4698, PETRI_PLACES=157, PETRI_TRANSITIONS=265} [2022-12-13 17:45:31,667 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2022-12-13 17:45:31,667 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 265 transitions, 4698 flow [2022-12-13 17:45:31,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:31,668 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:31,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 17:45:31,668 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash 319667318, now seen corresponding path program 6 times [2022-12-13 17:45:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242854655] [2022-12-13 17:45:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242854655] [2022-12-13 17:45:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242854655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:31,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:31,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831871516] [2022-12-13 17:45:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:31,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:31,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 265 transitions, 4698 flow. Second operand has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:31,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:31,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:34,221 INFO L130 PetriNetUnfolder]: 10586/15705 cut-off events. [2022-12-13 17:45:34,221 INFO L131 PetriNetUnfolder]: For 170574/170610 co-relation queries the response was YES. [2022-12-13 17:45:34,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77227 conditions, 15705 events. 10586/15705 cut-off events. For 170574/170610 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 98473 event pairs, 1256 based on Foata normal form. 37/14104 useless extension candidates. Maximal degree in co-relation 76331. Up to 5027 conditions per place. [2022-12-13 17:45:34,348 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 336 selfloop transitions, 76 changer transitions 11/424 dead transitions. [2022-12-13 17:45:34,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 424 transitions, 7096 flow [2022-12-13 17:45:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1713 transitions. [2022-12-13 17:45:34,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4680327868852459 [2022-12-13 17:45:34,350 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1713 transitions. [2022-12-13 17:45:34,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1713 transitions. [2022-12-13 17:45:34,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:34,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1713 transitions. [2022-12-13 17:45:34,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.5) internal successors, (1713), 6 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:34,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:34,355 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:34,355 INFO L175 Difference]: Start difference. First operand has 157 places, 265 transitions, 4698 flow. Second operand 6 states and 1713 transitions. [2022-12-13 17:45:34,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 424 transitions, 7096 flow [2022-12-13 17:45:35,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 424 transitions, 6877 flow, removed 46 selfloop flow, removed 3 redundant places. [2022-12-13 17:45:35,104 INFO L231 Difference]: Finished difference. Result has 161 places, 260 transitions, 4614 flow [2022-12-13 17:45:35,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4614, PETRI_PLACES=161, PETRI_TRANSITIONS=260} [2022-12-13 17:45:35,105 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2022-12-13 17:45:35,105 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 260 transitions, 4614 flow [2022-12-13 17:45:35,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:35,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:35,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:35,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 17:45:35,105 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2138800865, now seen corresponding path program 1 times [2022-12-13 17:45:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:35,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157458762] [2022-12-13 17:45:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:35,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157458762] [2022-12-13 17:45:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157458762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:35,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:35,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142821299] [2022-12-13 17:45:35,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:35,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 17:45:35,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 260 transitions, 4614 flow. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:35,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:35,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 17:45:35,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:37,268 INFO L130 PetriNetUnfolder]: 10254/15216 cut-off events. [2022-12-13 17:45:37,268 INFO L131 PetriNetUnfolder]: For 177336/177405 co-relation queries the response was YES. [2022-12-13 17:45:37,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74973 conditions, 15216 events. 10254/15216 cut-off events. For 177336/177405 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94230 event pairs, 3228 based on Foata normal form. 123/13698 useless extension candidates. Maximal degree in co-relation 74356. Up to 9272 conditions per place. [2022-12-13 17:45:37,344 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 284 selfloop transitions, 45 changer transitions 8/338 dead transitions. [2022-12-13 17:45:37,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 338 transitions, 5698 flow [2022-12-13 17:45:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1457 transitions. [2022-12-13 17:45:37,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47770491803278686 [2022-12-13 17:45:37,346 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1457 transitions. [2022-12-13 17:45:37,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1457 transitions. [2022-12-13 17:45:37,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:37,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1457 transitions. [2022-12-13 17:45:37,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.4) internal successors, (1457), 5 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:37,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:37,349 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:37,349 INFO L175 Difference]: Start difference. First operand has 161 places, 260 transitions, 4614 flow. Second operand 5 states and 1457 transitions. [2022-12-13 17:45:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 338 transitions, 5698 flow [2022-12-13 17:45:38,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 338 transitions, 5536 flow, removed 24 selfloop flow, removed 8 redundant places. [2022-12-13 17:45:38,051 INFO L231 Difference]: Finished difference. Result has 158 places, 257 transitions, 4475 flow [2022-12-13 17:45:38,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4475, PETRI_PLACES=158, PETRI_TRANSITIONS=257} [2022-12-13 17:45:38,051 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2022-12-13 17:45:38,051 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 257 transitions, 4475 flow [2022-12-13 17:45:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:38,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:38,052 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:38,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 17:45:38,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1868650353, now seen corresponding path program 2 times [2022-12-13 17:45:38,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:38,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943963622] [2022-12-13 17:45:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:38,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943963622] [2022-12-13 17:45:38,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943963622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:38,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:38,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866094617] [2022-12-13 17:45:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:38,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:38,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 17:45:38,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 257 transitions, 4475 flow. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:38,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:38,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 17:45:38,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:40,289 INFO L130 PetriNetUnfolder]: 9761/14340 cut-off events. [2022-12-13 17:45:40,290 INFO L131 PetriNetUnfolder]: For 159200/159269 co-relation queries the response was YES. [2022-12-13 17:45:40,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70167 conditions, 14340 events. 9761/14340 cut-off events. For 159200/159269 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 86221 event pairs, 3965 based on Foata normal form. 63/12840 useless extension candidates. Maximal degree in co-relation 69352. Up to 10661 conditions per place. [2022-12-13 17:45:40,363 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 220 selfloop transitions, 67 changer transitions 9/297 dead transitions. [2022-12-13 17:45:40,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 297 transitions, 5057 flow [2022-12-13 17:45:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1454 transitions. [2022-12-13 17:45:40,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47672131147540986 [2022-12-13 17:45:40,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1454 transitions. [2022-12-13 17:45:40,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1454 transitions. [2022-12-13 17:45:40,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:40,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1454 transitions. [2022-12-13 17:45:40,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:40,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:40,369 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:40,369 INFO L175 Difference]: Start difference. First operand has 158 places, 257 transitions, 4475 flow. Second operand 5 states and 1454 transitions. [2022-12-13 17:45:40,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 297 transitions, 5057 flow [2022-12-13 17:45:41,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 297 transitions, 4837 flow, removed 69 selfloop flow, removed 8 redundant places. [2022-12-13 17:45:41,026 INFO L231 Difference]: Finished difference. Result has 148 places, 226 transitions, 3917 flow [2022-12-13 17:45:41,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3917, PETRI_PLACES=148, PETRI_TRANSITIONS=226} [2022-12-13 17:45:41,026 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 110 predicate places. [2022-12-13 17:45:41,026 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 226 transitions, 3917 flow [2022-12-13 17:45:41,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:41,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:41,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 17:45:41,027 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1714634279, now seen corresponding path program 3 times [2022-12-13 17:45:41,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064972819] [2022-12-13 17:45:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:41,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064972819] [2022-12-13 17:45:41,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064972819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:41,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:41,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955370538] [2022-12-13 17:45:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:41,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:41,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:41,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 610 [2022-12-13 17:45:41,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 226 transitions, 3917 flow. Second operand has 4 states, 4 states have (on average 275.5) internal successors, (1102), 4 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 17:45:41,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:41,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 610 [2022-12-13 17:45:41,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:42,832 INFO L130 PetriNetUnfolder]: 9348/13755 cut-off events. [2022-12-13 17:45:42,832 INFO L131 PetriNetUnfolder]: For 144528/144630 co-relation queries the response was YES. [2022-12-13 17:45:42,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64771 conditions, 13755 events. 9348/13755 cut-off events. For 144528/144630 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 82771 event pairs, 1731 based on Foata normal form. 114/12381 useless extension candidates. Maximal degree in co-relation 63960. Up to 8240 conditions per place. [2022-12-13 17:45:42,901 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 192 selfloop transitions, 52 changer transitions 18/263 dead transitions. [2022-12-13 17:45:42,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 4510 flow [2022-12-13 17:45:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1430 transitions. [2022-12-13 17:45:42,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46885245901639344 [2022-12-13 17:45:42,903 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1430 transitions. [2022-12-13 17:45:42,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1430 transitions. [2022-12-13 17:45:42,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:42,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1430 transitions. [2022-12-13 17:45:42,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:42,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:42,906 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:42,906 INFO L175 Difference]: Start difference. First operand has 148 places, 226 transitions, 3917 flow. Second operand 5 states and 1430 transitions. [2022-12-13 17:45:42,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 4510 flow [2022-12-13 17:45:43,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 263 transitions, 4346 flow, removed 32 selfloop flow, removed 7 redundant places. [2022-12-13 17:45:43,559 INFO L231 Difference]: Finished difference. Result has 141 places, 205 transitions, 3425 flow [2022-12-13 17:45:43,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3425, PETRI_PLACES=141, PETRI_TRANSITIONS=205} [2022-12-13 17:45:43,560 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 103 predicate places. [2022-12-13 17:45:43,560 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 205 transitions, 3425 flow [2022-12-13 17:45:43,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 275.5) internal successors, (1102), 4 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 17:45:43,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:43,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:43,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 17:45:43,561 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1871655071, now seen corresponding path program 4 times [2022-12-13 17:45:43,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:43,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854343163] [2022-12-13 17:45:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:43,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:43,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854343163] [2022-12-13 17:45:43,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854343163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:43,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:43,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787954321] [2022-12-13 17:45:43,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:43,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:43,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:43,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 610 [2022-12-13 17:45:43,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 205 transitions, 3425 flow. Second operand has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:43,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:43,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 610 [2022-12-13 17:45:43,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:45,120 INFO L130 PetriNetUnfolder]: 8936/13225 cut-off events. [2022-12-13 17:45:45,120 INFO L131 PetriNetUnfolder]: For 123513/123549 co-relation queries the response was YES. [2022-12-13 17:45:45,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60432 conditions, 13225 events. 8936/13225 cut-off events. For 123513/123549 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 79953 event pairs, 2237 based on Foata normal form. 108/11863 useless extension candidates. Maximal degree in co-relation 59635. Up to 11107 conditions per place. [2022-12-13 17:45:45,182 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 211 selfloop transitions, 16 changer transitions 0/228 dead transitions. [2022-12-13 17:45:45,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 228 transitions, 3824 flow [2022-12-13 17:45:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1161 transitions. [2022-12-13 17:45:45,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47581967213114756 [2022-12-13 17:45:45,184 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1161 transitions. [2022-12-13 17:45:45,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1161 transitions. [2022-12-13 17:45:45,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:45,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1161 transitions. [2022-12-13 17:45:45,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:45,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:45,187 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:45,187 INFO L175 Difference]: Start difference. First operand has 141 places, 205 transitions, 3425 flow. Second operand 4 states and 1161 transitions. [2022-12-13 17:45:45,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 228 transitions, 3824 flow [2022-12-13 17:45:45,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 228 transitions, 3713 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-13 17:45:45,511 INFO L231 Difference]: Finished difference. Result has 141 places, 199 transitions, 3192 flow [2022-12-13 17:45:45,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3192, PETRI_PLACES=141, PETRI_TRANSITIONS=199} [2022-12-13 17:45:45,511 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 103 predicate places. [2022-12-13 17:45:45,511 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 199 transitions, 3192 flow [2022-12-13 17:45:45,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:45,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:45,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 17:45:45,511 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash -427906463, now seen corresponding path program 5 times [2022-12-13 17:45:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707315651] [2022-12-13 17:45:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:45,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707315651] [2022-12-13 17:45:45,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707315651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:45,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785128037] [2022-12-13 17:45:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:45,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:45,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 610 [2022-12-13 17:45:45,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 199 transitions, 3192 flow. Second operand has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:45,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:45,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 610 [2022-12-13 17:45:45,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:46,977 INFO L130 PetriNetUnfolder]: 8600/12753 cut-off events. [2022-12-13 17:45:46,977 INFO L131 PetriNetUnfolder]: For 117363/117387 co-relation queries the response was YES. [2022-12-13 17:45:47,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57886 conditions, 12753 events. 8600/12753 cut-off events. For 117363/117387 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 76756 event pairs, 2215 based on Foata normal form. 138/11457 useless extension candidates. Maximal degree in co-relation 57083. Up to 11526 conditions per place. [2022-12-13 17:45:47,059 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 189 selfloop transitions, 18 changer transitions 0/208 dead transitions. [2022-12-13 17:45:47,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 208 transitions, 3419 flow [2022-12-13 17:45:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1155 transitions. [2022-12-13 17:45:47,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4733606557377049 [2022-12-13 17:45:47,061 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1155 transitions. [2022-12-13 17:45:47,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1155 transitions. [2022-12-13 17:45:47,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:47,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1155 transitions. [2022-12-13 17:45:47,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.75) internal successors, (1155), 4 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:47,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:47,063 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:47,063 INFO L175 Difference]: Start difference. First operand has 141 places, 199 transitions, 3192 flow. Second operand 4 states and 1155 transitions. [2022-12-13 17:45:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 208 transitions, 3419 flow [2022-12-13 17:45:47,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 208 transitions, 3236 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-13 17:45:47,417 INFO L231 Difference]: Finished difference. Result has 138 places, 185 transitions, 2780 flow [2022-12-13 17:45:47,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2780, PETRI_PLACES=138, PETRI_TRANSITIONS=185} [2022-12-13 17:45:47,418 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 100 predicate places. [2022-12-13 17:45:47,418 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 185 transitions, 2780 flow [2022-12-13 17:45:47,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:47,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:47,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:47,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 17:45:47,418 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1453332505, now seen corresponding path program 6 times [2022-12-13 17:45:47,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:47,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899650040] [2022-12-13 17:45:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:47,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899650040] [2022-12-13 17:45:47,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899650040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:47,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:47,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946291353] [2022-12-13 17:45:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:47,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 610 [2022-12-13 17:45:47,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 185 transitions, 2780 flow. Second operand has 4 states, 4 states have (on average 275.5) internal successors, (1102), 4 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 17:45:47,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:47,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 610 [2022-12-13 17:45:47,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:48,772 INFO L130 PetriNetUnfolder]: 7910/11643 cut-off events. [2022-12-13 17:45:48,772 INFO L131 PetriNetUnfolder]: For 93731/93755 co-relation queries the response was YES. [2022-12-13 17:45:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53048 conditions, 11643 events. 7910/11643 cut-off events. For 93731/93755 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 67627 event pairs, 1630 based on Foata normal form. 96/10443 useless extension candidates. Maximal degree in co-relation 53010. Up to 8745 conditions per place. [2022-12-13 17:45:48,842 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 177 selfloop transitions, 37 changer transitions 9/224 dead transitions. [2022-12-13 17:45:48,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 224 transitions, 3302 flow [2022-12-13 17:45:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1432 transitions. [2022-12-13 17:45:48,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4695081967213115 [2022-12-13 17:45:48,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1432 transitions. [2022-12-13 17:45:48,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1432 transitions. [2022-12-13 17:45:48,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:48,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1432 transitions. [2022-12-13 17:45:48,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,848 INFO L175 Difference]: Start difference. First operand has 138 places, 185 transitions, 2780 flow. Second operand 5 states and 1432 transitions. [2022-12-13 17:45:48,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 224 transitions, 3302 flow [2022-12-13 17:45:49,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 224 transitions, 3264 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 17:45:49,105 INFO L231 Difference]: Finished difference. Result has 135 places, 163 transitions, 2451 flow [2022-12-13 17:45:49,106 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2451, PETRI_PLACES=135, PETRI_TRANSITIONS=163} [2022-12-13 17:45:49,106 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2022-12-13 17:45:49,106 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 163 transitions, 2451 flow [2022-12-13 17:45:49,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 275.5) internal successors, (1102), 4 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 17:45:49,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:49,106 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 17:45:49,106 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash 653045004, now seen corresponding path program 1 times [2022-12-13 17:45:49,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:49,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399362855] [2022-12-13 17:45:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:49,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399362855] [2022-12-13 17:45:49,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399362855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:49,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:49,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:49,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471468872] [2022-12-13 17:45:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:49,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 610 [2022-12-13 17:45:49,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 163 transitions, 2451 flow. Second operand has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:49,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:49,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 610 [2022-12-13 17:45:49,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:50,358 INFO L130 PetriNetUnfolder]: 7729/11441 cut-off events. [2022-12-13 17:45:50,358 INFO L131 PetriNetUnfolder]: For 91926/91962 co-relation queries the response was YES. [2022-12-13 17:45:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50891 conditions, 11441 events. 7729/11441 cut-off events. For 91926/91962 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 67592 event pairs, 941 based on Foata normal form. 120/10271 useless extension candidates. Maximal degree in co-relation 50853. Up to 9243 conditions per place. [2022-12-13 17:45:50,420 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 182 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2022-12-13 17:45:50,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 200 transitions, 2964 flow [2022-12-13 17:45:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1157 transitions. [2022-12-13 17:45:50,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47418032786885245 [2022-12-13 17:45:50,422 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1157 transitions. [2022-12-13 17:45:50,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1157 transitions. [2022-12-13 17:45:50,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:50,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1157 transitions. [2022-12-13 17:45:50,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:50,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:50,425 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:50,425 INFO L175 Difference]: Start difference. First operand has 135 places, 163 transitions, 2451 flow. Second operand 4 states and 1157 transitions. [2022-12-13 17:45:50,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 200 transitions, 2964 flow [2022-12-13 17:45:50,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 200 transitions, 2775 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-12-13 17:45:50,690 INFO L231 Difference]: Finished difference. Result has 127 places, 156 transitions, 2141 flow [2022-12-13 17:45:50,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2141, PETRI_PLACES=127, PETRI_TRANSITIONS=156} [2022-12-13 17:45:50,690 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2022-12-13 17:45:50,691 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 156 transitions, 2141 flow [2022-12-13 17:45:50,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:50,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:50,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 17:45:50,691 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 115229204, now seen corresponding path program 2 times [2022-12-13 17:45:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44919776] [2022-12-13 17:45:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44919776] [2022-12-13 17:45:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44919776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:50,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:50,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013976280] [2022-12-13 17:45:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:50,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:50,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:50,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 17:45:50,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 156 transitions, 2141 flow. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:50,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:50,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 17:45:50,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:51,996 INFO L130 PetriNetUnfolder]: 7145/10475 cut-off events. [2022-12-13 17:45:51,996 INFO L131 PetriNetUnfolder]: For 80477/80501 co-relation queries the response was YES. [2022-12-13 17:45:52,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45814 conditions, 10475 events. 7145/10475 cut-off events. For 80477/80501 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59025 event pairs, 2708 based on Foata normal form. 96/9374 useless extension candidates. Maximal degree in co-relation 45779. Up to 7728 conditions per place. [2022-12-13 17:45:52,036 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 198 selfloop transitions, 24 changer transitions 14/237 dead transitions. [2022-12-13 17:45:52,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 237 transitions, 2976 flow [2022-12-13 17:45:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:45:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:45:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1453 transitions. [2022-12-13 17:45:52,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4763934426229508 [2022-12-13 17:45:52,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1453 transitions. [2022-12-13 17:45:52,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1453 transitions. [2022-12-13 17:45:52,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:52,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1453 transitions. [2022-12-13 17:45:52,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:52,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:52,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:52,041 INFO L175 Difference]: Start difference. First operand has 127 places, 156 transitions, 2141 flow. Second operand 5 states and 1453 transitions. [2022-12-13 17:45:52,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 237 transitions, 2976 flow [2022-12-13 17:45:52,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 237 transitions, 2962 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:52,231 INFO L231 Difference]: Finished difference. Result has 125 places, 146 transitions, 1972 flow [2022-12-13 17:45:52,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1972, PETRI_PLACES=125, PETRI_TRANSITIONS=146} [2022-12-13 17:45:52,232 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2022-12-13 17:45:52,232 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 146 transitions, 1972 flow [2022-12-13 17:45:52,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:52,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:52,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 17:45:52,232 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash 145891558, now seen corresponding path program 3 times [2022-12-13 17:45:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:52,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940524852] [2022-12-13 17:45:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:52,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940524852] [2022-12-13 17:45:52,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940524852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:52,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:52,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:52,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597971428] [2022-12-13 17:45:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:52,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 610 [2022-12-13 17:45:52,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 146 transitions, 1972 flow. Second operand has 4 states, 4 states have (on average 275.5) internal successors, (1102), 4 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 17:45:52,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:52,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 610 [2022-12-13 17:45:52,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:53,333 INFO L130 PetriNetUnfolder]: 6437/9363 cut-off events. [2022-12-13 17:45:53,333 INFO L131 PetriNetUnfolder]: For 73394/73430 co-relation queries the response was YES. [2022-12-13 17:45:53,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41953 conditions, 9363 events. 6437/9363 cut-off events. For 73394/73430 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 51288 event pairs, 793 based on Foata normal form. 66/8409 useless extension candidates. Maximal degree in co-relation 41919. Up to 7291 conditions per place. [2022-12-13 17:45:53,381 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 150 selfloop transitions, 19 changer transitions 8/178 dead transitions. [2022-12-13 17:45:53,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 2369 flow [2022-12-13 17:45:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1152 transitions. [2022-12-13 17:45:53,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4721311475409836 [2022-12-13 17:45:53,383 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1152 transitions. [2022-12-13 17:45:53,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1152 transitions. [2022-12-13 17:45:53,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:53,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1152 transitions. [2022-12-13 17:45:53,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,387 INFO L175 Difference]: Start difference. First operand has 125 places, 146 transitions, 1972 flow. Second operand 4 states and 1152 transitions. [2022-12-13 17:45:53,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 2369 flow [2022-12-13 17:45:53,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 178 transitions, 2178 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-12-13 17:45:53,721 INFO L231 Difference]: Finished difference. Result has 116 places, 126 transitions, 1512 flow [2022-12-13 17:45:53,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1512, PETRI_PLACES=116, PETRI_TRANSITIONS=126} [2022-12-13 17:45:53,721 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2022-12-13 17:45:53,721 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 126 transitions, 1512 flow [2022-12-13 17:45:53,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 275.5) internal successors, (1102), 4 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 17:45:53,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:53,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 17:45:53,722 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1485462814, now seen corresponding path program 4 times [2022-12-13 17:45:53,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:53,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261485041] [2022-12-13 17:45:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:53,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261485041] [2022-12-13 17:45:53,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261485041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:53,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:53,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35302007] [2022-12-13 17:45:53,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:53,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:53,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 610 [2022-12-13 17:45:53,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 126 transitions, 1512 flow. Second operand has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:53,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 610 [2022-12-13 17:45:53,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:54,653 INFO L130 PetriNetUnfolder]: 6037/8815 cut-off events. [2022-12-13 17:45:54,654 INFO L131 PetriNetUnfolder]: For 56603/56627 co-relation queries the response was YES. [2022-12-13 17:45:54,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 8815 events. 6037/8815 cut-off events. For 56603/56627 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 48186 event pairs, 943 based on Foata normal form. 180/8005 useless extension candidates. Maximal degree in co-relation 36858. Up to 7683 conditions per place. [2022-12-13 17:45:54,689 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 129 selfloop transitions, 11 changer transitions 0/141 dead transitions. [2022-12-13 17:45:54,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 141 transitions, 1604 flow [2022-12-13 17:45:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1152 transitions. [2022-12-13 17:45:54,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4721311475409836 [2022-12-13 17:45:54,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1152 transitions. [2022-12-13 17:45:54,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1152 transitions. [2022-12-13 17:45:54,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:54,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1152 transitions. [2022-12-13 17:45:54,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,695 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,695 INFO L175 Difference]: Start difference. First operand has 116 places, 126 transitions, 1512 flow. Second operand 4 states and 1152 transitions. [2022-12-13 17:45:54,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 141 transitions, 1604 flow [2022-12-13 17:45:54,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1403 flow, removed 19 selfloop flow, removed 12 redundant places. [2022-12-13 17:45:54,807 INFO L231 Difference]: Finished difference. Result has 100 places, 112 transitions, 1009 flow [2022-12-13 17:45:54,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1009, PETRI_PLACES=100, PETRI_TRANSITIONS=112} [2022-12-13 17:45:54,807 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2022-12-13 17:45:54,807 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 112 transitions, 1009 flow [2022-12-13 17:45:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.5) internal successors, (1110), 4 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:54,808 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:54,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 17:45:54,808 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash 529939368, now seen corresponding path program 1 times [2022-12-13 17:45:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:54,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874455480] [2022-12-13 17:45:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:54,899 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 17:45:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874455480] [2022-12-13 17:45:54,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874455480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576256314] [2022-12-13 17:45:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:54,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:54,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:54,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:45:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:45:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:55,111 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 17:45:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:55,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576256314] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:55,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:45:55,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-13 17:45:55,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976220652] [2022-12-13 17:45:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:55,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:45:55,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:45:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:45:55,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 610 [2022-12-13 17:45:55,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 112 transitions, 1009 flow. Second operand has 7 states, 7 states have (on average 259.2857142857143) internal successors, (1815), 7 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:55,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:55,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 610 [2022-12-13 17:45:55,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:56,629 INFO L130 PetriNetUnfolder]: 7587/11318 cut-off events. [2022-12-13 17:45:56,629 INFO L131 PetriNetUnfolder]: For 51125/51134 co-relation queries the response was YES. [2022-12-13 17:45:56,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44150 conditions, 11318 events. 7587/11318 cut-off events. For 51125/51134 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 66949 event pairs, 1515 based on Foata normal form. 80/10190 useless extension candidates. Maximal degree in co-relation 44126. Up to 3403 conditions per place. [2022-12-13 17:45:56,688 INFO L137 encePairwiseOnDemand]: 600/610 looper letters, 352 selfloop transitions, 23 changer transitions 0/376 dead transitions. [2022-12-13 17:45:56,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 376 transitions, 4251 flow [2022-12-13 17:45:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:45:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:45:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2720 transitions. [2022-12-13 17:45:56,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4459016393442623 [2022-12-13 17:45:56,690 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2720 transitions. [2022-12-13 17:45:56,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2720 transitions. [2022-12-13 17:45:56,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:56,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2720 transitions. [2022-12-13 17:45:56,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 272.0) internal successors, (2720), 10 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 610.0) internal successors, (6710), 11 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,695 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 610.0) internal successors, (6710), 11 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,696 INFO L175 Difference]: Start difference. First operand has 100 places, 112 transitions, 1009 flow. Second operand 10 states and 2720 transitions. [2022-12-13 17:45:56,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 376 transitions, 4251 flow [2022-12-13 17:45:56,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 376 transitions, 4116 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 17:45:56,789 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1244 flow [2022-12-13 17:45:56,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1244, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2022-12-13 17:45:56,789 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2022-12-13 17:45:56,789 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1244 flow [2022-12-13 17:45:56,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 259.2857142857143) internal successors, (1815), 7 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:56,789 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:56,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:56,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:56,991 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash -555820020, now seen corresponding path program 1 times [2022-12-13 17:45:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218807618] [2022-12-13 17:45:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:56,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:45:57,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218807618] [2022-12-13 17:45:57,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218807618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:57,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:57,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707219526] [2022-12-13 17:45:57,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:57,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:45:57,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:57,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:45:57,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:45:57,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:45:57,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1244 flow. Second operand has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:57,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:57,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:45:57,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:58,012 INFO L130 PetriNetUnfolder]: 5306/8138 cut-off events. [2022-12-13 17:45:58,012 INFO L131 PetriNetUnfolder]: For 35914/35920 co-relation queries the response was YES. [2022-12-13 17:45:58,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34026 conditions, 8138 events. 5306/8138 cut-off events. For 35914/35920 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 46227 event pairs, 2612 based on Foata normal form. 304/7890 useless extension candidates. Maximal degree in co-relation 34001. Up to 6412 conditions per place. [2022-12-13 17:45:58,042 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 107 selfloop transitions, 2 changer transitions 134/244 dead transitions. [2022-12-13 17:45:58,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 244 transitions, 2868 flow [2022-12-13 17:45:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:45:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:45:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1965 transitions. [2022-12-13 17:45:58,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601873536299766 [2022-12-13 17:45:58,045 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1965 transitions. [2022-12-13 17:45:58,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1965 transitions. [2022-12-13 17:45:58,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:58,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1965 transitions. [2022-12-13 17:45:58,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.7142857142857) internal successors, (1965), 7 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,049 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,049 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1244 flow. Second operand 7 states and 1965 transitions. [2022-12-13 17:45:58,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 244 transitions, 2868 flow [2022-12-13 17:45:58,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 244 transitions, 2863 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:58,118 INFO L231 Difference]: Finished difference. Result has 115 places, 110 transitions, 1141 flow [2022-12-13 17:45:58,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1141, PETRI_PLACES=115, PETRI_TRANSITIONS=110} [2022-12-13 17:45:58,118 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2022-12-13 17:45:58,118 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 110 transitions, 1141 flow [2022-12-13 17:45:58,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:58,119 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-13 17:45:58,119 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash 977083916, now seen corresponding path program 1 times [2022-12-13 17:45:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147311269] [2022-12-13 17:45:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:45:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147311269] [2022-12-13 17:45:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147311269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:58,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:58,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766849465] [2022-12-13 17:45:58,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:58,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 610 [2022-12-13 17:45:58,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 110 transitions, 1141 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 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 17:45:58,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:58,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 610 [2022-12-13 17:45:58,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:58,917 INFO L130 PetriNetUnfolder]: 5104/7689 cut-off events. [2022-12-13 17:45:58,917 INFO L131 PetriNetUnfolder]: For 28383/28395 co-relation queries the response was YES. [2022-12-13 17:45:58,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30180 conditions, 7689 events. 5104/7689 cut-off events. For 28383/28395 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43074 event pairs, 579 based on Foata normal form. 201/7369 useless extension candidates. Maximal degree in co-relation 30152. Up to 5512 conditions per place. [2022-12-13 17:45:58,951 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 144 selfloop transitions, 13 changer transitions 0/158 dead transitions. [2022-12-13 17:45:58,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 158 transitions, 1679 flow [2022-12-13 17:45:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1160 transitions. [2022-12-13 17:45:58,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47540983606557374 [2022-12-13 17:45:58,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1160 transitions. [2022-12-13 17:45:58,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1160 transitions. [2022-12-13 17:45:58,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:58,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1160 transitions. [2022-12-13 17:45:58,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,955 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,955 INFO L175 Difference]: Start difference. First operand has 115 places, 110 transitions, 1141 flow. Second operand 4 states and 1160 transitions. [2022-12-13 17:45:58,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 158 transitions, 1679 flow [2022-12-13 17:45:59,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1601 flow, removed 23 selfloop flow, removed 8 redundant places. [2022-12-13 17:45:59,039 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 1153 flow [2022-12-13 17:45:59,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1153, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2022-12-13 17:45:59,040 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2022-12-13 17:45:59,040 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 1153 flow [2022-12-13 17:45:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 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 17:45:59,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:59,040 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:59,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-13 17:45:59,040 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1799903918, now seen corresponding path program 2 times [2022-12-13 17:45:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:59,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191354019] [2022-12-13 17:45:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:59,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:45:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191354019] [2022-12-13 17:45:59,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191354019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:59,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:59,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:45:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069274873] [2022-12-13 17:45:59,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:59,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:59,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 610 [2022-12-13 17:45:59,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 1153 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 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 17:45:59,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:59,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 610 [2022-12-13 17:45:59,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:59,779 INFO L130 PetriNetUnfolder]: 4624/7012 cut-off events. [2022-12-13 17:45:59,779 INFO L131 PetriNetUnfolder]: For 30256/30274 co-relation queries the response was YES. [2022-12-13 17:45:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27472 conditions, 7012 events. 4624/7012 cut-off events. For 30256/30274 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38960 event pairs, 297 based on Foata normal form. 198/6741 useless extension candidates. Maximal degree in co-relation 27447. Up to 5468 conditions per place. [2022-12-13 17:45:59,808 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 139 selfloop transitions, 12 changer transitions 0/152 dead transitions. [2022-12-13 17:45:59,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 152 transitions, 1592 flow [2022-12-13 17:45:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1158 transitions. [2022-12-13 17:45:59,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4745901639344262 [2022-12-13 17:45:59,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1158 transitions. [2022-12-13 17:45:59,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1158 transitions. [2022-12-13 17:45:59,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:59,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1158 transitions. [2022-12-13 17:45:59,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 289.5) internal successors, (1158), 4 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:59,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:59,813 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:59,813 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 1153 flow. Second operand 4 states and 1158 transitions. [2022-12-13 17:45:59,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 152 transitions, 1592 flow [2022-12-13 17:45:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 152 transitions, 1574 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:59,859 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 1113 flow [2022-12-13 17:45:59,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1113, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2022-12-13 17:45:59,859 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2022-12-13 17:45:59,859 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 1113 flow [2022-12-13 17:45:59,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 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 17:45:59,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:59,860 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:59,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-13 17:45:59,860 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:45:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash -263981038, now seen corresponding path program 1 times [2022-12-13 17:45:59,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:59,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095077120] [2022-12-13 17:45:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:59,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095077120] [2022-12-13 17:46:00,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095077120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997634765] [2022-12-13 17:46:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:00,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:00,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:00,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:46:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 17:46:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:46:00,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:46:00,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997634765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:00,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:00,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-12-13 17:46:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898512868] [2022-12-13 17:46:00,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 17:46:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 17:46:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:46:01,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 610 [2022-12-13 17:46:01,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 1113 flow. Second operand has 23 states, 23 states have (on average 237.3913043478261) internal successors, (5460), 23 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:01,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 610 [2022-12-13 17:46:01,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:46:06,948 INFO L130 PetriNetUnfolder]: 14761/22588 cut-off events. [2022-12-13 17:46:06,948 INFO L131 PetriNetUnfolder]: For 96542/96651 co-relation queries the response was YES. [2022-12-13 17:46:07,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90718 conditions, 22588 events. 14761/22588 cut-off events. For 96542/96651 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 153199 event pairs, 3406 based on Foata normal form. 648/21718 useless extension candidates. Maximal degree in co-relation 90694. Up to 2968 conditions per place. [2022-12-13 17:46:07,054 INFO L137 encePairwiseOnDemand]: 593/610 looper letters, 352 selfloop transitions, 95 changer transitions 657/1105 dead transitions. [2022-12-13 17:46:07,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 1105 transitions, 11395 flow [2022-12-13 17:46:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 17:46:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-13 17:46:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 15943 transitions. [2022-12-13 17:46:07,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40209331651954605 [2022-12-13 17:46:07,071 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 15943 transitions. [2022-12-13 17:46:07,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 15943 transitions. [2022-12-13 17:46:07,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:07,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 15943 transitions. [2022-12-13 17:46:07,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 245.27692307692308) internal successors, (15943), 65 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:07,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 610.0) internal successors, (40260), 66 states have internal predecessors, (40260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:07,107 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 610.0) internal successors, (40260), 66 states have internal predecessors, (40260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:07,107 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 1113 flow. Second operand 65 states and 15943 transitions. [2022-12-13 17:46:07,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 1105 transitions, 11395 flow [2022-12-13 17:46:07,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1105 transitions, 11200 flow, removed 32 selfloop flow, removed 2 redundant places. [2022-12-13 17:46:07,326 INFO L231 Difference]: Finished difference. Result has 197 places, 185 transitions, 2367 flow [2022-12-13 17:46:07,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=2367, PETRI_PLACES=197, PETRI_TRANSITIONS=185} [2022-12-13 17:46:07,326 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 159 predicate places. [2022-12-13 17:46:07,326 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 185 transitions, 2367 flow [2022-12-13 17:46:07,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 237.3913043478261) internal successors, (5460), 23 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:07,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:07,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:07,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:07,528 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:46:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash -600998552, now seen corresponding path program 1 times [2022-12-13 17:46:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:07,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898765212] [2022-12-13 17:46:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:07,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898765212] [2022-12-13 17:46:07,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898765212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:46:07,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:46:07,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:46:07,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728740253] [2022-12-13 17:46:07,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:46:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:46:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:46:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:46:07,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 610 [2022-12-13 17:46:07,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 185 transitions, 2367 flow. Second operand has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:07,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:07,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 610 [2022-12-13 17:46:07,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:46:08,794 INFO L130 PetriNetUnfolder]: 5515/8309 cut-off events. [2022-12-13 17:46:08,794 INFO L131 PetriNetUnfolder]: For 112977/113027 co-relation queries the response was YES. [2022-12-13 17:46:08,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46335 conditions, 8309 events. 5515/8309 cut-off events. For 112977/113027 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 46426 event pairs, 2536 based on Foata normal form. 301/8140 useless extension candidates. Maximal degree in co-relation 46278. Up to 6763 conditions per place. [2022-12-13 17:46:08,841 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 148 selfloop transitions, 4 changer transitions 90/243 dead transitions. [2022-12-13 17:46:08,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 243 transitions, 3639 flow [2022-12-13 17:46:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:46:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:46:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1665 transitions. [2022-12-13 17:46:08,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45491803278688525 [2022-12-13 17:46:08,843 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1665 transitions. [2022-12-13 17:46:08,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1665 transitions. [2022-12-13 17:46:08,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:08,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1665 transitions. [2022-12-13 17:46:08,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 277.5) internal successors, (1665), 6 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:08,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:08,846 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:08,846 INFO L175 Difference]: Start difference. First operand has 197 places, 185 transitions, 2367 flow. Second operand 6 states and 1665 transitions. [2022-12-13 17:46:08,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 243 transitions, 3639 flow [2022-12-13 17:46:09,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 243 transitions, 3156 flow, removed 232 selfloop flow, removed 33 redundant places. [2022-12-13 17:46:09,224 INFO L231 Difference]: Finished difference. Result has 131 places, 153 transitions, 1792 flow [2022-12-13 17:46:09,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1792, PETRI_PLACES=131, PETRI_TRANSITIONS=153} [2022-12-13 17:46:09,224 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 93 predicate places. [2022-12-13 17:46:09,224 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 153 transitions, 1792 flow [2022-12-13 17:46:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:09,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:09,225 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-13 17:46:09,225 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:46:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash -483397036, now seen corresponding path program 1 times [2022-12-13 17:46:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:09,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707246369] [2022-12-13 17:46:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:09,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:46:09,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707246369] [2022-12-13 17:46:09,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707246369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852124496] [2022-12-13 17:46:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:09,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:09,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:09,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:46:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:46:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:46:09,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:46:09,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852124496] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:09,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:46:09,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2022-12-13 17:46:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396489443] [2022-12-13 17:46:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:46:09,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:46:09,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:46:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:46:09,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 610 [2022-12-13 17:46:09,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 153 transitions, 1792 flow. Second operand has 7 states, 7 states have (on average 259.85714285714283) internal successors, (1819), 7 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:09,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:09,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 610 [2022-12-13 17:46:09,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:46:10,568 INFO L130 PetriNetUnfolder]: 5895/9002 cut-off events. [2022-12-13 17:46:10,568 INFO L131 PetriNetUnfolder]: For 47238/47266 co-relation queries the response was YES. [2022-12-13 17:46:10,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37922 conditions, 9002 events. 5895/9002 cut-off events. For 47238/47266 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 52668 event pairs, 1624 based on Foata normal form. 440/8981 useless extension candidates. Maximal degree in co-relation 37894. Up to 5460 conditions per place. [2022-12-13 17:46:10,614 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 203 selfloop transitions, 19 changer transitions 0/223 dead transitions. [2022-12-13 17:46:10,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 223 transitions, 3119 flow [2022-12-13 17:46:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:46:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:46:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1850 transitions. [2022-12-13 17:46:10,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332552693208431 [2022-12-13 17:46:10,616 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1850 transitions. [2022-12-13 17:46:10,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1850 transitions. [2022-12-13 17:46:10,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:10,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1850 transitions. [2022-12-13 17:46:10,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 264.2857142857143) internal successors, (1850), 7 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:10,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:10,619 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:10,619 INFO L175 Difference]: Start difference. First operand has 131 places, 153 transitions, 1792 flow. Second operand 7 states and 1850 transitions. [2022-12-13 17:46:10,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 223 transitions, 3119 flow [2022-12-13 17:46:10,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2981 flow, removed 13 selfloop flow, removed 8 redundant places. [2022-12-13 17:46:10,811 INFO L231 Difference]: Finished difference. Result has 121 places, 154 transitions, 1780 flow [2022-12-13 17:46:10,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1780, PETRI_PLACES=121, PETRI_TRANSITIONS=154} [2022-12-13 17:46:10,812 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2022-12-13 17:46:10,812 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 154 transitions, 1780 flow [2022-12-13 17:46:10,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 259.85714285714283) internal successors, (1819), 7 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:10,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:10,812 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:10,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:46:11,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 17:46:11,014 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:46:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2136613674, now seen corresponding path program 1 times [2022-12-13 17:46:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:11,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537557704] [2022-12-13 17:46:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537557704] [2022-12-13 17:46:11,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537557704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834726659] [2022-12-13 17:46:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:11,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:11,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:11,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:46:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:46:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:11,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:11,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834726659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:11,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:11,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2022-12-13 17:46:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197654909] [2022-12-13 17:46:11,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:11,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:46:11,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:46:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:46:12,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 610 [2022-12-13 17:46:12,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 154 transitions, 1780 flow. Second operand has 16 states, 16 states have (on average 257.625) internal successors, (4122), 16 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:12,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:12,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 610 [2022-12-13 17:46:12,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:46:14,842 INFO L130 PetriNetUnfolder]: 14098/21474 cut-off events. [2022-12-13 17:46:14,843 INFO L131 PetriNetUnfolder]: For 107451/107475 co-relation queries the response was YES. [2022-12-13 17:46:14,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94385 conditions, 21474 events. 14098/21474 cut-off events. For 107451/107475 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 142494 event pairs, 4348 based on Foata normal form. 24/21481 useless extension candidates. Maximal degree in co-relation 94359. Up to 6493 conditions per place. [2022-12-13 17:46:14,935 INFO L137 encePairwiseOnDemand]: 600/610 looper letters, 384 selfloop transitions, 85 changer transitions 56/526 dead transitions. [2022-12-13 17:46:14,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 526 transitions, 6932 flow [2022-12-13 17:46:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:46:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:46:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3471 transitions. [2022-12-13 17:46:14,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377049180327869 [2022-12-13 17:46:14,939 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3471 transitions. [2022-12-13 17:46:14,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3471 transitions. [2022-12-13 17:46:14,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:14,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3471 transitions. [2022-12-13 17:46:14,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:14,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 610.0) internal successors, (8540), 14 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:14,948 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 610.0) internal successors, (8540), 14 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:14,948 INFO L175 Difference]: Start difference. First operand has 121 places, 154 transitions, 1780 flow. Second operand 13 states and 3471 transitions. [2022-12-13 17:46:14,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 526 transitions, 6932 flow [2022-12-13 17:46:15,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 526 transitions, 6885 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:46:15,200 INFO L231 Difference]: Finished difference. Result has 135 places, 202 transitions, 2570 flow [2022-12-13 17:46:15,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2570, PETRI_PLACES=135, PETRI_TRANSITIONS=202} [2022-12-13 17:46:15,201 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2022-12-13 17:46:15,201 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 202 transitions, 2570 flow [2022-12-13 17:46:15,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 257.625) internal successors, (4122), 16 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:15,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:15,201 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:15,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:46:15,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 17:46:15,403 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:46:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:15,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1979133534, now seen corresponding path program 1 times [2022-12-13 17:46:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780965016] [2022-12-13 17:46:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:46:16,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:16,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780965016] [2022-12-13 17:46:16,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780965016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:16,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480117553] [2022-12-13 17:46:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:16,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:16,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:16,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:16,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de28eec-9bd0-4a9c-ab42-60873a6d46f6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:46:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 17:46:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:16,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 17:46:16,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:46:16,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:46:16,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:46:17,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:17,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 141 treesize of output 241 [2022-12-13 17:46:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:46:18,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:18,710 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_thread1Thread1of1ForFork0_~i~0 4))) (let ((.cse2 (+ c_~get1~0.offset .cse9)) (.cse4 (+ c_~get2~0.offset .cse9))) (let ((.cse6 (forall ((~get1~0.base Int) (~get2~0.base Int) (v_ArrVal_1319 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1319))) (let ((.cse8 (select .cse7 ~get2~0.base))) (or (< (select (select .cse7 ~get1~0.base) .cse2) (select .cse8 .cse4)) (< (select .cse8 c_~get2~0.offset) (select (select .cse7 c_~get3~0.base) c_~get3~0.offset)))))))) (and (forall ((~get2~0.base Int) (v_ArrVal_1319 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1319))) (let ((.cse3 (select .cse5 ~get2~0.base)) (.cse0 (select (select .cse5 c_~get3~0.base) c_~get3~0.offset))) (or (forall ((~get1~0.base Int)) (let ((.cse1 (select .cse5 ~get1~0.base))) (or (<= .cse0 (select .cse1 c_~get1~0.offset)) (< (select .cse1 .cse2) (select .cse3 .cse4))))) (< (select .cse3 c_~get2~0.offset) .cse0))))) (or (< 0 c_~n1~0) .cse6) (or .cse6 (< 0 c_~n3~0)))))) is different from false [2022-12-13 17:46:19,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:19,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 71 [2022-12-13 17:46:20,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:20,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35819 treesize of output 33804 [2022-12-13 17:46:20,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:20,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33771 treesize of output 32771 [2022-12-13 17:46:20,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:20,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32747 treesize of output 28675 [2022-12-13 17:46:20,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:20,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28651 treesize of output 26627