./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R --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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- 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-38b53e6 [2022-11-25 17:48:28,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:48:28,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:48:28,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:48:28,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:48:28,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:48:28,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:48:28,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:48:28,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:48:28,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:48:28,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:48:28,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:48:28,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:48:28,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:48:28,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:48:28,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:48:28,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:48:28,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:48:28,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:48:28,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:48:28,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:48:28,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:48:28,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:48:28,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:48:28,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:48:28,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:48:28,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:48:28,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:48:28,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:48:28,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:48:28,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:48:28,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:48:28,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:48:28,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:48:28,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:48:28,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:48:28,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:48:28,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:48:28,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:48:28,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:48:28,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:48:28,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:48:29,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:48:29,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:48:29,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:48:29,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:48:29,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:48:29,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:48:29,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:48:29,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:48:29,015 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:48:29,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:48:29,016 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:48:29,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:48:29,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:48:29,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:48:29,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:48:29,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:48:29,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:48:29,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:48:29,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:48:29,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:48:29,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:48:29,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:48:29,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:48:29,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:48:29,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:48:29,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:48:29,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:48:29,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:48:29,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:48:29,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:48:29,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:48:29,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:48:29,023 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:48:29,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:48:29,023 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_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-25 17:48:29,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:48:29,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:48:29,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:48:29,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:48:29,384 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:48:29,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-25 17:48:32,576 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:48:32,826 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:48:32,837 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-25 17:48:32,850 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/data/f4dfaefd0/725cb135d4914b10a7db18d14ed9af26/FLAGd6d395f0d [2022-11-25 17:48:32,866 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/data/f4dfaefd0/725cb135d4914b10a7db18d14ed9af26 [2022-11-25 17:48:32,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:48:32,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:48:32,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:48:32,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:48:32,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:48:32,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:32" (1/1) ... [2022-11-25 17:48:32,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b531e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:32, skipping insertion in model container [2022-11-25 17:48:32,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:32" (1/1) ... [2022-11-25 17:48:32,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:48:32,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:48:33,189 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_5b994c69-782f-4b30-8f54-b1537775c608/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-25 17:48:33,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:48:33,229 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:48:33,259 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_5b994c69-782f-4b30-8f54-b1537775c608/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-25 17:48:33,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:48:33,279 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:48:33,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33 WrapperNode [2022-11-25 17:48:33,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:48:33,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:48:33,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:48:33,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:48:33,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,345 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 413 [2022-11-25 17:48:33,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:48:33,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:48:33,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:48:33,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:48:33,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,396 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:48:33,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:48:33,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:48:33,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:48:33,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (1/1) ... [2022-11-25 17:48:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:48:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:48:33,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:48:33,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:48:33,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:48:33,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:48:33,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:48:33,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:48:33,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:48:33,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:48:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:48:33,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:48:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:48:33,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:48:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:48:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:48:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:48:33,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:48:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:48:33,507 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:48:33,641 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:48:33,644 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:48:34,355 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:48:34,381 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:48:34,381 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 17:48:34,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:48:34 BoogieIcfgContainer [2022-11-25 17:48:34,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:48:34,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:48:34,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:48:34,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:48:34,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:48:32" (1/3) ... [2022-11-25 17:48:34,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce25e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:48:34, skipping insertion in model container [2022-11-25 17:48:34,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:33" (2/3) ... [2022-11-25 17:48:34,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce25e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:48:34, skipping insertion in model container [2022-11-25 17:48:34,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:48:34" (3/3) ... [2022-11-25 17:48:34,396 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2022-11-25 17:48:34,405 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:48:34,415 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:48:34,415 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:48:34,416 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:48:34,619 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:48:34,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 513 places, 544 transitions, 1112 flow [2022-11-25 17:48:34,983 INFO L130 PetriNetUnfolder]: 41/541 cut-off events. [2022-11-25 17:48:34,984 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:48:34,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 541 events. 41/541 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 690 event pairs, 0 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 459. Up to 2 conditions per place. [2022-11-25 17:48:34,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 513 places, 544 transitions, 1112 flow [2022-11-25 17:48:35,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 499 places, 530 transitions, 1078 flow [2022-11-25 17:48:35,014 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:48:35,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 499 places, 530 transitions, 1078 flow [2022-11-25 17:48:35,047 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 499 places, 530 transitions, 1078 flow [2022-11-25 17:48:35,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 499 places, 530 transitions, 1078 flow [2022-11-25 17:48:35,177 INFO L130 PetriNetUnfolder]: 41/530 cut-off events. [2022-11-25 17:48:35,177 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:48:35,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 530 events. 41/530 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 691 event pairs, 0 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 459. Up to 2 conditions per place. [2022-11-25 17:48:35,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 21384 [2022-11-25 17:49:00,606 INFO L134 LiptonReduction]: Checked pairs total: 22479 [2022-11-25 17:49:00,607 INFO L136 LiptonReduction]: Total number of compositions: 610 [2022-11-25 17:49:00,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:49:00,653 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;@d426c71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:49:00,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:49:00,682 INFO L130 PetriNetUnfolder]: 10/41 cut-off events. [2022-11-25 17:49:00,683 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:49:00,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:00,684 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] [2022-11-25 17:49:00,684 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)] === [2022-11-25 17:49:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 485326457, now seen corresponding path program 1 times [2022-11-25 17:49:00,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:00,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364105966] [2022-11-25 17:49:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:00,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364105966] [2022-11-25 17:49:01,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364105966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:01,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:01,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:01,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569608311] [2022-11-25 17:49:01,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:01,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:01,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1154 [2022-11-25 17:49:01,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 510.3333333333333) internal successors, (1531), 3 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:01,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:01,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1154 [2022-11-25 17:49:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:01,638 INFO L130 PetriNetUnfolder]: 835/1228 cut-off events. [2022-11-25 17:49:01,638 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-11-25 17:49:01,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 1228 events. 835/1228 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4517 event pairs, 477 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 2392. Up to 913 conditions per place. [2022-11-25 17:49:01,646 INFO L137 encePairwiseOnDemand]: 1150/1154 looper letters, 54 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2022-11-25 17:49:01,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 252 flow [2022-11-25 17:49:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1561 transitions. [2022-11-25 17:49:01,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450895436164067 [2022-11-25 17:49:01,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1561 transitions. [2022-11-25 17:49:01,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1561 transitions. [2022-11-25 17:49:01,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:01,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1561 transitions. [2022-11-25 17:49:01,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 520.3333333333334) internal successors, (1561), 3 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:01,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1154.0) internal successors, (4616), 4 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:01,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1154.0) internal successors, (4616), 4 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:01,711 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 102 flow. Second operand 3 states and 1561 transitions. [2022-11-25 17:49:01,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 252 flow [2022-11-25 17:49:01,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:49:01,720 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 108 flow [2022-11-25 17:49:01,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2022-11-25 17:49:01,727 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2022-11-25 17:49:01,728 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 108 flow [2022-11-25 17:49:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 510.3333333333333) internal successors, (1531), 3 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:01,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:01,729 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] [2022-11-25 17:49:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:49:01,730 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)] === [2022-11-25 17:49:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1600070657, now seen corresponding path program 1 times [2022-11-25 17:49:01,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:01,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121585597] [2022-11-25 17:49:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:01,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:01,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121585597] [2022-11-25 17:49:01,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121585597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:01,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:01,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731506920] [2022-11-25 17:49:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:01,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1154 [2022-11-25 17:49:01,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 510.6666666666667) internal successors, (1532), 3 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:01,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:01,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1154 [2022-11-25 17:49:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:02,271 INFO L130 PetriNetUnfolder]: 943/1388 cut-off events. [2022-11-25 17:49:02,271 INFO L131 PetriNetUnfolder]: For 520/520 co-relation queries the response was YES. [2022-11-25 17:49:02,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3253 conditions, 1388 events. 943/1388 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5061 event pairs, 541 based on Foata normal form. 0/1278 useless extension candidates. Maximal degree in co-relation 2065. Up to 1017 conditions per place. [2022-11-25 17:49:02,280 INFO L137 encePairwiseOnDemand]: 1150/1154 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2022-11-25 17:49:02,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 59 transitions, 276 flow [2022-11-25 17:49:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1561 transitions. [2022-11-25 17:49:02,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450895436164067 [2022-11-25 17:49:02,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1561 transitions. [2022-11-25 17:49:02,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1561 transitions. [2022-11-25 17:49:02,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:02,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1561 transitions. [2022-11-25 17:49:02,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 520.3333333333334) internal successors, (1561), 3 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:02,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1154.0) internal successors, (4616), 4 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:02,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1154.0) internal successors, (4616), 4 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:02,300 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 108 flow. Second operand 3 states and 1561 transitions. [2022-11-25 17:49:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 59 transitions, 276 flow [2022-11-25 17:49:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:02,305 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 120 flow [2022-11-25 17:49:02,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2022-11-25 17:49:02,306 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2022-11-25 17:49:02,306 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 120 flow [2022-11-25 17:49:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 510.6666666666667) internal successors, (1532), 3 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:02,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:02,308 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] [2022-11-25 17:49:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:49:02,308 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)] === [2022-11-25 17:49:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1092880384, now seen corresponding path program 1 times [2022-11-25 17:49:02,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:02,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156544857] [2022-11-25 17:49:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:49:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:02,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156544857] [2022-11-25 17:49:02,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156544857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:02,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:02,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:49:02,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479031875] [2022-11-25 17:49:02,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:49:02,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:49:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:49:02,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1154 [2022-11-25 17:49:02,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:02,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:02,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1154 [2022-11-25 17:49:02,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:03,015 INFO L130 PetriNetUnfolder]: 943/1389 cut-off events. [2022-11-25 17:49:03,015 INFO L131 PetriNetUnfolder]: For 390/390 co-relation queries the response was YES. [2022-11-25 17:49:03,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3522 conditions, 1389 events. 943/1389 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5038 event pairs, 733 based on Foata normal form. 0/1333 useless extension candidates. Maximal degree in co-relation 2229. Up to 1389 conditions per place. [2022-11-25 17:49:03,023 INFO L137 encePairwiseOnDemand]: 1151/1154 looper letters, 43 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-11-25 17:49:03,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 212 flow [2022-11-25 17:49:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:49:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:49:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1526 transitions. [2022-11-25 17:49:03,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44078567302137495 [2022-11-25 17:49:03,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1526 transitions. [2022-11-25 17:49:03,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1526 transitions. [2022-11-25 17:49:03,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:03,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1526 transitions. [2022-11-25 17:49:03,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 508.6666666666667) internal successors, (1526), 3 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1154.0) internal successors, (4616), 4 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1154.0) internal successors, (4616), 4 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,042 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 120 flow. Second operand 3 states and 1526 transitions. [2022-11-25 17:49:03,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 212 flow [2022-11-25 17:49:03,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:03,052 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 126 flow [2022-11-25 17:49:03,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2022-11-25 17:49:03,054 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-11-25 17:49:03,054 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 126 flow [2022-11-25 17:49:03,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:03,056 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] [2022-11-25 17:49:03,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:49:03,057 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)] === [2022-11-25 17:49:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1569018855, now seen corresponding path program 1 times [2022-11-25 17:49:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:03,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588056736] [2022-11-25 17:49:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588056736] [2022-11-25 17:49:03,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588056736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:03,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:03,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359247789] [2022-11-25 17:49:03,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:03,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:49:03,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1154 [2022-11-25 17:49:03,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 501.75) internal successors, (2007), 4 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:03,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1154 [2022-11-25 17:49:03,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:03,723 INFO L130 PetriNetUnfolder]: 943/1390 cut-off events. [2022-11-25 17:49:03,724 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-25 17:49:03,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3374 conditions, 1390 events. 943/1390 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5038 event pairs, 733 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 3361. Up to 1388 conditions per place. [2022-11-25 17:49:03,733 INFO L137 encePairwiseOnDemand]: 1149/1154 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2022-11-25 17:49:03,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 220 flow [2022-11-25 17:49:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2022-11-25 17:49:03,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4378249566724437 [2022-11-25 17:49:03,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2022-11-25 17:49:03,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2022-11-25 17:49:03,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:03,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2022-11-25 17:49:03,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,758 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 126 flow. Second operand 4 states and 2021 transitions. [2022-11-25 17:49:03,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 220 flow [2022-11-25 17:49:03,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 216 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:03,762 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 140 flow [2022-11-25 17:49:03,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2022-11-25 17:49:03,763 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-11-25 17:49:03,763 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 140 flow [2022-11-25 17:49:03,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 501.75) internal successors, (2007), 4 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:03,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:03,765 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, 1] [2022-11-25 17:49:03,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:49:03,766 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)] === [2022-11-25 17:49:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1250567303, now seen corresponding path program 1 times [2022-11-25 17:49:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:03,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843727668] [2022-11-25 17:49:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:49:04,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:04,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843727668] [2022-11-25 17:49:04,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843727668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:04,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:04,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253829488] [2022-11-25 17:49:04,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:04,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:49:04,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1154 [2022-11-25 17:49:04,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:04,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:04,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1154 [2022-11-25 17:49:04,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:04,452 INFO L130 PetriNetUnfolder]: 943/1391 cut-off events. [2022-11-25 17:49:04,452 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2022-11-25 17:49:04,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3383 conditions, 1391 events. 943/1391 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5034 event pairs, 733 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 3361. Up to 1390 conditions per place. [2022-11-25 17:49:04,461 INFO L137 encePairwiseOnDemand]: 1150/1154 looper letters, 44 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2022-11-25 17:49:04,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 236 flow [2022-11-25 17:49:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2022-11-25 17:49:04,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376083188908146 [2022-11-25 17:49:04,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2022-11-25 17:49:04,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2022-11-25 17:49:04,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:04,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2022-11-25 17:49:04,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:04,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:04,490 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:04,491 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 140 flow. Second operand 4 states and 2020 transitions. [2022-11-25 17:49:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 236 flow [2022-11-25 17:49:04,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:04,496 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 153 flow [2022-11-25 17:49:04,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2022-11-25 17:49:04,500 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2022-11-25 17:49:04,500 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 153 flow [2022-11-25 17:49:04,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:04,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:04,502 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, 1, 1] [2022-11-25 17:49:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:49:04,502 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)] === [2022-11-25 17:49:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash 754751408, now seen corresponding path program 1 times [2022-11-25 17:49:04,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137690905] [2022-11-25 17:49:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:49:04,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:04,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137690905] [2022-11-25 17:49:04,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137690905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:04,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:04,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898458671] [2022-11-25 17:49:04,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:04,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:49:04,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1154 [2022-11-25 17:49:04,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 502.25) internal successors, (2009), 4 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:04,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:04,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1154 [2022-11-25 17:49:04,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:05,130 INFO L130 PetriNetUnfolder]: 943/1392 cut-off events. [2022-11-25 17:49:05,131 INFO L131 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2022-11-25 17:49:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3392 conditions, 1392 events. 943/1392 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5034 event pairs, 733 based on Foata normal form. 0/1286 useless extension candidates. Maximal degree in co-relation 3368. Up to 1391 conditions per place. [2022-11-25 17:49:05,139 INFO L137 encePairwiseOnDemand]: 1150/1154 looper letters, 45 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2022-11-25 17:49:05,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 251 flow [2022-11-25 17:49:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2022-11-25 17:49:05,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376083188908146 [2022-11-25 17:49:05,147 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2022-11-25 17:49:05,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2022-11-25 17:49:05,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:05,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2022-11-25 17:49:05,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,165 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,166 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 153 flow. Second operand 4 states and 2020 transitions. [2022-11-25 17:49:05,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 251 flow [2022-11-25 17:49:05,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 245 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:05,170 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 161 flow [2022-11-25 17:49:05,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2022-11-25 17:49:05,171 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2022-11-25 17:49:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 161 flow [2022-11-25 17:49:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 502.25) internal successors, (2009), 4 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:05,173 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, 1, 1, 1] [2022-11-25 17:49:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:49:05,174 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)] === [2022-11-25 17:49:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1547928116, now seen corresponding path program 1 times [2022-11-25 17:49:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:05,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876008715] [2022-11-25 17:49:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:49:05,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876008715] [2022-11-25 17:49:05,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876008715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:05,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:05,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:49:05,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645305247] [2022-11-25 17:49:05,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:05,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:05,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:49:05,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1154 [2022-11-25 17:49:05,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 502.5) internal successors, (2010), 4 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:05,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1154 [2022-11-25 17:49:05,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:05,848 INFO L130 PetriNetUnfolder]: 943/1393 cut-off events. [2022-11-25 17:49:05,849 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-25 17:49:05,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3398 conditions, 1393 events. 943/1393 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5034 event pairs, 733 based on Foata normal form. 0/1288 useless extension candidates. Maximal degree in co-relation 3373. Up to 1392 conditions per place. [2022-11-25 17:49:05,857 INFO L137 encePairwiseOnDemand]: 1150/1154 looper letters, 46 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-11-25 17:49:05,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 261 flow [2022-11-25 17:49:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2022-11-25 17:49:05,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376083188908146 [2022-11-25 17:49:05,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2022-11-25 17:49:05,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2022-11-25 17:49:05,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:05,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2022-11-25 17:49:05,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,879 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 161 flow. Second operand 4 states and 2020 transitions. [2022-11-25 17:49:05,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 261 flow [2022-11-25 17:49:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 255 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:05,882 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 169 flow [2022-11-25 17:49:05,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2022-11-25 17:49:05,883 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2022-11-25 17:49:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 169 flow [2022-11-25 17:49:05,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 502.5) internal successors, (2010), 4 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:05,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:05,885 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, 1, 1, 1, 1] [2022-11-25 17:49:05,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:49:05,885 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)] === [2022-11-25 17:49:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1628191839, now seen corresponding path program 1 times [2022-11-25 17:49:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:05,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989408428] [2022-11-25 17:49:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:05,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:49:06,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:06,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989408428] [2022-11-25 17:49:06,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989408428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:49:06,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518259472] [2022-11-25 17:49:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:06,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:49:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:49:06,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:49:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:49:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:49:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:49:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:49:06,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:49:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518259472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:06,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:49:06,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 17:49:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477830640] [2022-11-25 17:49:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:49:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:49:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:49:06,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1154 [2022-11-25 17:49:06,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 502.75) internal successors, (2011), 4 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:06,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:06,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1154 [2022-11-25 17:49:06,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:07,003 INFO L130 PetriNetUnfolder]: 943/1394 cut-off events. [2022-11-25 17:49:07,003 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-25 17:49:07,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3404 conditions, 1394 events. 943/1394 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5034 event pairs, 733 based on Foata normal form. 0/1290 useless extension candidates. Maximal degree in co-relation 3378. Up to 1393 conditions per place. [2022-11-25 17:49:07,012 INFO L137 encePairwiseOnDemand]: 1150/1154 looper letters, 47 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-11-25 17:49:07,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 271 flow [2022-11-25 17:49:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:49:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:49:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2022-11-25 17:49:07,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376083188908146 [2022-11-25 17:49:07,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2022-11-25 17:49:07,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2022-11-25 17:49:07,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:07,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2022-11-25 17:49:07,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,032 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1154.0) internal successors, (5770), 5 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,032 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 169 flow. Second operand 4 states and 2020 transitions. [2022-11-25 17:49:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 271 flow [2022-11-25 17:49:07,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 265 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:07,036 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 177 flow [2022-11-25 17:49:07,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2022-11-25 17:49:07,037 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2022-11-25 17:49:07,037 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 177 flow [2022-11-25 17:49:07,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 502.75) internal successors, (2011), 4 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:07,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:07,038 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:07,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:49:07,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b994c69-782f-4b30-8f54-b1537775c608/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:49:07,246 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)] === [2022-11-25 17:49:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:07,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1714052197, now seen corresponding path program 1 times [2022-11-25 17:49:07,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:07,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814131817] [2022-11-25 17:49:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814131817] [2022-11-25 17:49:09,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814131817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:09,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:09,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:49:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249834193] [2022-11-25 17:49:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:49:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:49:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:49:11,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 1154 [2022-11-25 17:49:11,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 177 flow. Second operand has 13 states, 13 states have (on average 457.7692307692308) internal successors, (5951), 13 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:11,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:11,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 1154 [2022-11-25 17:49:11,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:13,408 INFO L130 PetriNetUnfolder]: 2861/4241 cut-off events. [2022-11-25 17:49:13,409 INFO L131 PetriNetUnfolder]: For 934/934 co-relation queries the response was YES. [2022-11-25 17:49:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10485 conditions, 4241 events. 2861/4241 cut-off events. For 934/934 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21224 event pairs, 397 based on Foata normal form. 1/3890 useless extension candidates. Maximal degree in co-relation 10458. Up to 1213 conditions per place. [2022-11-25 17:49:13,441 INFO L137 encePairwiseOnDemand]: 1141/1154 looper letters, 160 selfloop transitions, 12 changer transitions 7/179 dead transitions. [2022-11-25 17:49:13,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 179 transitions, 908 flow [2022-11-25 17:49:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:49:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:49:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5623 transitions. [2022-11-25 17:49:13,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40605141536684 [2022-11-25 17:49:13,461 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5623 transitions. [2022-11-25 17:49:13,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5623 transitions. [2022-11-25 17:49:13,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:13,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5623 transitions. [2022-11-25 17:49:13,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 468.5833333333333) internal successors, (5623), 12 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:13,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1154.0) internal successors, (15002), 13 states have internal predecessors, (15002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:13,500 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1154.0) internal successors, (15002), 13 states have internal predecessors, (15002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:13,500 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 177 flow. Second operand 12 states and 5623 transitions. [2022-11-25 17:49:13,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 179 transitions, 908 flow [2022-11-25 17:49:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 179 transitions, 902 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:13,523 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 243 flow [2022-11-25 17:49:13,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=243, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2022-11-25 17:49:13,525 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2022-11-25 17:49:13,525 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 243 flow [2022-11-25 17:49:13,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 457.7692307692308) internal successors, (5951), 13 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:13,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:13,527 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:13,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:49:13,528 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)] === [2022-11-25 17:49:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash -561641723, now seen corresponding path program 2 times [2022-11-25 17:49:13,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574714603] [2022-11-25 17:49:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:14,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:14,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574714603] [2022-11-25 17:49:14,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574714603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:14,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:14,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:49:14,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412031617] [2022-11-25 17:49:14,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:14,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:49:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:49:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:49:15,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 466 out of 1154 [2022-11-25 17:49:15,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 243 flow. Second operand has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:15,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:15,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 466 of 1154 [2022-11-25 17:49:15,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:17,872 INFO L130 PetriNetUnfolder]: 5235/7907 cut-off events. [2022-11-25 17:49:17,872 INFO L131 PetriNetUnfolder]: For 5544/5544 co-relation queries the response was YES. [2022-11-25 17:49:17,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22210 conditions, 7907 events. 5235/7907 cut-off events. For 5544/5544 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44864 event pairs, 1744 based on Foata normal form. 1/7907 useless extension candidates. Maximal degree in co-relation 22176. Up to 3812 conditions per place. [2022-11-25 17:49:17,943 INFO L137 encePairwiseOnDemand]: 1145/1154 looper letters, 145 selfloop transitions, 13 changer transitions 7/165 dead transitions. [2022-11-25 17:49:17,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 962 flow [2022-11-25 17:49:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:49:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:49:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4333 transitions. [2022-11-25 17:49:17,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41719622568842674 [2022-11-25 17:49:17,955 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4333 transitions. [2022-11-25 17:49:17,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4333 transitions. [2022-11-25 17:49:17,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:17,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4333 transitions. [2022-11-25 17:49:17,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 481.44444444444446) internal successors, (4333), 9 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:17,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:17,986 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:17,986 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 243 flow. Second operand 9 states and 4333 transitions. [2022-11-25 17:49:17,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 962 flow [2022-11-25 17:49:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 165 transitions, 929 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 17:49:18,071 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 341 flow [2022-11-25 17:49:18,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=341, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2022-11-25 17:49:18,073 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2022-11-25 17:49:18,074 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 341 flow [2022-11-25 17:49:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:18,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:18,076 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:18,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:49:18,077 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)] === [2022-11-25 17:49:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1816868389, now seen corresponding path program 3 times [2022-11-25 17:49:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:18,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557230774] [2022-11-25 17:49:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:20,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:20,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557230774] [2022-11-25 17:49:20,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557230774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:20,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:20,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 17:49:20,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668063328] [2022-11-25 17:49:20,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:20,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:49:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:49:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:49:24,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 437 out of 1154 [2022-11-25 17:49:24,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 341 flow. Second operand has 16 states, 16 states have (on average 439.25) internal successors, (7028), 16 states have internal predecessors, (7028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:24,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:24,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 437 of 1154 [2022-11-25 17:49:24,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:30,192 INFO L130 PetriNetUnfolder]: 8691/13480 cut-off events. [2022-11-25 17:49:30,193 INFO L131 PetriNetUnfolder]: For 17807/17807 co-relation queries the response was YES. [2022-11-25 17:49:30,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41940 conditions, 13480 events. 8691/13480 cut-off events. For 17807/17807 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 88780 event pairs, 855 based on Foata normal form. 2/13481 useless extension candidates. Maximal degree in co-relation 41902. Up to 4398 conditions per place. [2022-11-25 17:49:30,315 INFO L137 encePairwiseOnDemand]: 1132/1154 looper letters, 252 selfloop transitions, 99 changer transitions 8/359 dead transitions. [2022-11-25 17:49:30,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 359 transitions, 2417 flow [2022-11-25 17:49:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:49:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 17:49:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 10335 transitions. [2022-11-25 17:49:30,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38938286489337653 [2022-11-25 17:49:30,339 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 10335 transitions. [2022-11-25 17:49:30,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 10335 transitions. [2022-11-25 17:49:30,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:30,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 10335 transitions. [2022-11-25 17:49:30,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 449.3478260869565) internal successors, (10335), 23 states have internal predecessors, (10335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:30,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 1154.0) internal successors, (27696), 24 states have internal predecessors, (27696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:30,407 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 1154.0) internal successors, (27696), 24 states have internal predecessors, (27696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:30,407 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 341 flow. Second operand 23 states and 10335 transitions. [2022-11-25 17:49:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 359 transitions, 2417 flow [2022-11-25 17:49:30,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 359 transitions, 2401 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-25 17:49:30,663 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 1508 flow [2022-11-25 17:49:30,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1508, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2022-11-25 17:49:30,664 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2022-11-25 17:49:30,664 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 1508 flow [2022-11-25 17:49:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 439.25) internal successors, (7028), 16 states have internal predecessors, (7028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:30,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:30,667 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:30,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:49:30,667 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)] === [2022-11-25 17:49:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1004591237, now seen corresponding path program 4 times [2022-11-25 17:49:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:30,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137626177] [2022-11-25 17:49:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:31,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137626177] [2022-11-25 17:49:31,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137626177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:31,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:31,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:49:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297420746] [2022-11-25 17:49:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:49:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:49:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:49:32,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 466 out of 1154 [2022-11-25 17:49:32,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 1508 flow. Second operand has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:32,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:32,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 466 of 1154 [2022-11-25 17:49:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:36,590 INFO L130 PetriNetUnfolder]: 9625/15179 cut-off events. [2022-11-25 17:49:36,590 INFO L131 PetriNetUnfolder]: For 64235/64235 co-relation queries the response was YES. [2022-11-25 17:49:36,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68936 conditions, 15179 events. 9625/15179 cut-off events. For 64235/64235 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 102887 event pairs, 2829 based on Foata normal form. 1/15179 useless extension candidates. Maximal degree in co-relation 68879. Up to 6593 conditions per place. [2022-11-25 17:49:36,741 INFO L137 encePairwiseOnDemand]: 1145/1154 looper letters, 421 selfloop transitions, 49 changer transitions 7/477 dead transitions. [2022-11-25 17:49:36,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 477 transitions, 4575 flow [2022-11-25 17:49:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:49:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:49:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4341 transitions. [2022-11-25 17:49:36,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41796649335644137 [2022-11-25 17:49:36,751 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4341 transitions. [2022-11-25 17:49:36,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4341 transitions. [2022-11-25 17:49:36,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:36,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4341 transitions. [2022-11-25 17:49:36,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 482.3333333333333) internal successors, (4341), 9 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:36,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:36,776 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:36,776 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 1508 flow. Second operand 9 states and 4341 transitions. [2022-11-25 17:49:36,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 477 transitions, 4575 flow [2022-11-25 17:49:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 477 transitions, 4378 flow, removed 96 selfloop flow, removed 4 redundant places. [2022-11-25 17:49:37,663 INFO L231 Difference]: Finished difference. Result has 125 places, 195 transitions, 1713 flow [2022-11-25 17:49:37,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1713, PETRI_PLACES=125, PETRI_TRANSITIONS=195} [2022-11-25 17:49:37,664 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2022-11-25 17:49:37,665 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 195 transitions, 1713 flow [2022-11-25 17:49:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:37,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:37,666 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:37,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:49:37,667 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)] === [2022-11-25 17:49:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1917900837, now seen corresponding path program 5 times [2022-11-25 17:49:37,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:37,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971963759] [2022-11-25 17:49:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:39,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971963759] [2022-11-25 17:49:39,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971963759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:39,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:39,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:49:39,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649984206] [2022-11-25 17:49:39,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:39,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:49:39,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:39,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:49:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:49:41,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 457 out of 1154 [2022-11-25 17:49:41,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 195 transitions, 1713 flow. Second operand has 13 states, 13 states have (on average 459.7692307692308) internal successors, (5977), 13 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:41,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:41,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 457 of 1154 [2022-11-25 17:49:41,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:46,721 INFO L130 PetriNetUnfolder]: 13348/21033 cut-off events. [2022-11-25 17:49:46,721 INFO L131 PetriNetUnfolder]: For 98351/98351 co-relation queries the response was YES. [2022-11-25 17:49:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97476 conditions, 21033 events. 13348/21033 cut-off events. For 98351/98351 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 152235 event pairs, 1016 based on Foata normal form. 2/21034 useless extension candidates. Maximal degree in co-relation 97415. Up to 9483 conditions per place. [2022-11-25 17:49:46,982 INFO L137 encePairwiseOnDemand]: 1144/1154 looper letters, 377 selfloop transitions, 67 changer transitions 8/452 dead transitions. [2022-11-25 17:49:46,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 452 transitions, 4454 flow [2022-11-25 17:49:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:49:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:49:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4718 transitions. [2022-11-25 17:49:46,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40883882149046796 [2022-11-25 17:49:47,000 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4718 transitions. [2022-11-25 17:49:47,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4718 transitions. [2022-11-25 17:49:47,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:47,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4718 transitions. [2022-11-25 17:49:47,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 471.8) internal successors, (4718), 10 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:47,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1154.0) internal successors, (12694), 11 states have internal predecessors, (12694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:47,022 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1154.0) internal successors, (12694), 11 states have internal predecessors, (12694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:47,022 INFO L175 Difference]: Start difference. First operand has 125 places, 195 transitions, 1713 flow. Second operand 10 states and 4718 transitions. [2022-11-25 17:49:47,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 452 transitions, 4454 flow [2022-11-25 17:49:48,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 452 transitions, 4414 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-25 17:49:48,504 INFO L231 Difference]: Finished difference. Result has 137 places, 214 transitions, 2138 flow [2022-11-25 17:49:48,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2138, PETRI_PLACES=137, PETRI_TRANSITIONS=214} [2022-11-25 17:49:48,505 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2022-11-25 17:49:48,506 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 214 transitions, 2138 flow [2022-11-25 17:49:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 459.7692307692308) internal successors, (5977), 13 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:48,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:48,508 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:48,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:49:48,508 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)] === [2022-11-25 17:49:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1602407697, now seen corresponding path program 6 times [2022-11-25 17:49:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511881413] [2022-11-25 17:49:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:49,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511881413] [2022-11-25 17:49:49,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511881413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:49,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:49,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:49:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892631679] [2022-11-25 17:49:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:49:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:49:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:49:50,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 466 out of 1154 [2022-11-25 17:49:50,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 214 transitions, 2138 flow. Second operand has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:50,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:50,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 466 of 1154 [2022-11-25 17:49:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:56,605 INFO L130 PetriNetUnfolder]: 14664/23382 cut-off events. [2022-11-25 17:49:56,605 INFO L131 PetriNetUnfolder]: For 138227/138227 co-relation queries the response was YES. [2022-11-25 17:49:56,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112941 conditions, 23382 events. 14664/23382 cut-off events. For 138227/138227 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 172659 event pairs, 3506 based on Foata normal form. 1/23382 useless extension candidates. Maximal degree in co-relation 112874. Up to 11900 conditions per place. [2022-11-25 17:49:57,066 INFO L137 encePairwiseOnDemand]: 1146/1154 looper letters, 368 selfloop transitions, 80 changer transitions 7/455 dead transitions. [2022-11-25 17:49:57,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 455 transitions, 4963 flow [2022-11-25 17:49:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:49:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:49:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4327 transitions. [2022-11-25 17:49:57,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41661852493741575 [2022-11-25 17:49:57,079 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4327 transitions. [2022-11-25 17:49:57,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4327 transitions. [2022-11-25 17:49:57,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:49:57,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4327 transitions. [2022-11-25 17:49:57,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 480.77777777777777) internal successors, (4327), 9 states have internal predecessors, (4327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:57,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:57,103 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:57,103 INFO L175 Difference]: Start difference. First operand has 137 places, 214 transitions, 2138 flow. Second operand 9 states and 4327 transitions. [2022-11-25 17:49:57,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 455 transitions, 4963 flow [2022-11-25 17:49:58,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 455 transitions, 4872 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-11-25 17:49:58,731 INFO L231 Difference]: Finished difference. Result has 147 places, 228 transitions, 2531 flow [2022-11-25 17:49:58,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2531, PETRI_PLACES=147, PETRI_TRANSITIONS=228} [2022-11-25 17:49:58,732 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2022-11-25 17:49:58,732 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 228 transitions, 2531 flow [2022-11-25 17:49:58,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:58,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:49:58,733 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, 1, 1, 1, 1, 1] [2022-11-25 17:49:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:49:58,734 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)] === [2022-11-25 17:49:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:49:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1930588469, now seen corresponding path program 7 times [2022-11-25 17:49:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:49:58,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646680808] [2022-11-25 17:49:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:49:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:49:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:49:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:49:59,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:49:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646680808] [2022-11-25 17:49:59,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646680808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:49:59,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:49:59,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:49:59,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369196280] [2022-11-25 17:49:59,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:49:59,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:49:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:49:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:50:00,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 466 out of 1154 [2022-11-25 17:50:00,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 228 transitions, 2531 flow. Second operand has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:00,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:50:00,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 466 of 1154 [2022-11-25 17:50:00,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:50:07,577 INFO L130 PetriNetUnfolder]: 15981/25649 cut-off events. [2022-11-25 17:50:07,577 INFO L131 PetriNetUnfolder]: For 192072/192072 co-relation queries the response was YES. [2022-11-25 17:50:07,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127667 conditions, 25649 events. 15981/25649 cut-off events. For 192072/192072 co-relation queries the response was YES. Maximal size of possible extension queue 1414. Compared 194999 event pairs, 5067 based on Foata normal form. 1/25649 useless extension candidates. Maximal degree in co-relation 127595. Up to 12870 conditions per place. [2022-11-25 17:50:07,904 INFO L137 encePairwiseOnDemand]: 1145/1154 looper letters, 383 selfloop transitions, 48 changer transitions 8/439 dead transitions. [2022-11-25 17:50:07,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 439 transitions, 5238 flow [2022-11-25 17:50:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:50:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:50:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4351 transitions. [2022-11-25 17:50:07,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41892932794145965 [2022-11-25 17:50:07,914 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4351 transitions. [2022-11-25 17:50:07,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4351 transitions. [2022-11-25 17:50:07,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:50:07,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4351 transitions. [2022-11-25 17:50:07,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 483.44444444444446) internal successors, (4351), 9 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:07,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:07,941 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1154.0) internal successors, (11540), 10 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:07,941 INFO L175 Difference]: Start difference. First operand has 147 places, 228 transitions, 2531 flow. Second operand 9 states and 4351 transitions. [2022-11-25 17:50:07,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 439 transitions, 5238 flow [2022-11-25 17:50:11,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 439 transitions, 5125 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-11-25 17:50:11,070 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 3077 flow [2022-11-25 17:50:11,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3077, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2022-11-25 17:50:11,071 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2022-11-25 17:50:11,071 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 3077 flow [2022-11-25 17:50:11,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:11,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:50:11,072 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, 1, 1, 1, 1, 1] [2022-11-25 17:50:11,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:50:11,073 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)] === [2022-11-25 17:50:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash 839755585, now seen corresponding path program 8 times [2022-11-25 17:50:11,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:50:11,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821906261] [2022-11-25 17:50:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:50:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:50:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:50:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:50:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:50:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821906261] [2022-11-25 17:50:12,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821906261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:50:12,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:50:12,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 17:50:12,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93180764] [2022-11-25 17:50:12,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:50:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:50:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:50:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:50:12,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:50:14,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 457 out of 1154 [2022-11-25 17:50:14,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 3077 flow. Second operand has 14 states, 14 states have (on average 459.57142857142856) internal successors, (6434), 14 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:14,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:50:14,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 457 of 1154 [2022-11-25 17:50:14,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:50:22,956 INFO L130 PetriNetUnfolder]: 16975/28263 cut-off events. [2022-11-25 17:50:22,956 INFO L131 PetriNetUnfolder]: For 211658/211658 co-relation queries the response was YES. [2022-11-25 17:50:23,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142407 conditions, 28263 events. 16975/28263 cut-off events. For 211658/211658 co-relation queries the response was YES. Maximal size of possible extension queue 1628. Compared 231331 event pairs, 3208 based on Foata normal form. 3/28265 useless extension candidates. Maximal degree in co-relation 142329. Up to 22534 conditions per place. [2022-11-25 17:50:23,441 INFO L137 encePairwiseOnDemand]: 1144/1154 looper letters, 393 selfloop transitions, 45 changer transitions 10/448 dead transitions. [2022-11-25 17:50:23,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 448 transitions, 6245 flow [2022-11-25 17:50:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:50:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:50:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4696 transitions. [2022-11-25 17:50:23,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40693240901213173 [2022-11-25 17:50:23,453 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4696 transitions. [2022-11-25 17:50:23,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4696 transitions. [2022-11-25 17:50:23,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:50:23,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4696 transitions. [2022-11-25 17:50:23,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 469.6) internal successors, (4696), 10 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:23,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1154.0) internal successors, (12694), 11 states have internal predecessors, (12694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:23,482 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1154.0) internal successors, (12694), 11 states have internal predecessors, (12694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:23,482 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 3077 flow. Second operand 10 states and 4696 transitions. [2022-11-25 17:50:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 448 transitions, 6245 flow [2022-11-25 17:50:25,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 448 transitions, 5995 flow, removed 105 selfloop flow, removed 2 redundant places. [2022-11-25 17:50:25,946 INFO L231 Difference]: Finished difference. Result has 170 places, 271 transitions, 3444 flow [2022-11-25 17:50:25,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1154, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3444, PETRI_PLACES=170, PETRI_TRANSITIONS=271} [2022-11-25 17:50:25,947 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2022-11-25 17:50:25,947 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 271 transitions, 3444 flow [2022-11-25 17:50:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 459.57142857142856) internal successors, (6434), 14 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:25,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:50:25,948 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, 1, 1, 1, 1, 1] [2022-11-25 17:50:25,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:50:25,948 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)] === [2022-11-25 17:50:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:50:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1061898915, now seen corresponding path program 9 times [2022-11-25 17:50:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:50:25,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945009919] [2022-11-25 17:50:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:50:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:50:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:50:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:50:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:50:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945009919] [2022-11-25 17:50:27,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945009919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:50:27,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:50:27,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:50:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961656654] [2022-11-25 17:50:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:50:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:50:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:50:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:50:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:50:29,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 1154 [2022-11-25 17:50:29,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 271 transitions, 3444 flow. Second operand has 13 states, 13 states have (on average 457.7692307692308) internal successors, (5951), 13 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:50:29,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:50:29,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 1154 [2022-11-25 17:50:29,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand