./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:58:05,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:58:05,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:58:05,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:58:05,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:58:05,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:58:05,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:58:05,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:58:05,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:58:05,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:58:05,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:58:05,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:58:05,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:58:05,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:58:05,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:58:05,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:58:05,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:58:05,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:58:05,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:58:05,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:58:05,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:58:05,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:58:05,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:58:05,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:58:05,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:58:05,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:58:05,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:58:05,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:58:05,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:58:05,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:58:05,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:58:05,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:58:05,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:58:05,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:58:05,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:58:05,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:58:05,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:58:05,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:58:05,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:58:05,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:58:05,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:58:05,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:58:05,543 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:58:05,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:58:05,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:58:05,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:58:05,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:58:05,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:58:05,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:58:05,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:58:05,546 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:58:05,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:58:05,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:58:05,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:58:05,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:58:05,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:58:05,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:58:05,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:58:05,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:58:05,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:58:05,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:58:05,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:58:05,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:58:05,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:58:05,550 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:58:05,550 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_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 [2022-12-13 13:58:05,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:58:05,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:58:05,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:58:05,771 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:58:05,772 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:58:05,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-12-13 13:58:08,325 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:58:08,538 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:58:08,538 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-12-13 13:58:08,550 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/data/66d28b9c7/59a412a978724a9ca8408c8f8a9d1b25/FLAG0347b1dc1 [2022-12-13 13:58:08,920 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/data/66d28b9c7/59a412a978724a9ca8408c8f8a9d1b25 [2022-12-13 13:58:08,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:58:08,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:58:08,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:58:08,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:58:08,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:58:08,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:58:08" (1/1) ... [2022-12-13 13:58:08,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b55753c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:08, skipping insertion in model container [2022-12-13 13:58:08,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:58:08" (1/1) ... [2022-12-13 13:58:08,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:58:08,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:58:09,102 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:58:09,211 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:58:09,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:58:09,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:58:09,213 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_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-12-13 13:58:09,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:58:09,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:58:09,229 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:58:09,239 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:58:09,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:58:09,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:58:09,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:58:09,255 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_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-12-13 13:58:09,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:58:09,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:58:09,278 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:58:09,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09 WrapperNode [2022-12-13 13:58:09,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:58:09,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:58:09,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:58:09,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:58:09,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,304 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-12-13 13:58:09,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:58:09,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:58:09,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:58:09,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:58:09,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:58:09,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:58:09,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:58:09,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:58:09,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (1/1) ... [2022-12-13 13:58:09,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:58:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:58:09,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:58:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf5deee7-9ffd-4a23-85a9-2ebdb178dc8c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:58:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 13:58:09,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 13:58:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:58:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 13:58:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:58:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:58:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:58:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:58:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 13:58:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:58:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:58:09,370 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:58:09,459 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:58:09,461 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:58:09,534 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:58:09,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:58:09,545 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 13:58:09,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:58:09 BoogieIcfgContainer [2022-12-13 13:58:09,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:58:09,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:58:09,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:58:09,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:58:09,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:58:08" (1/3) ... [2022-12-13 13:58:09,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723e038b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:58:09, skipping insertion in model container [2022-12-13 13:58:09,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:58:09" (2/3) ... [2022-12-13 13:58:09,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723e038b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:58:09, skipping insertion in model container [2022-12-13 13:58:09,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:58:09" (3/3) ... [2022-12-13 13:58:09,555 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2022-12-13 13:58:09,562 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 13:58:09,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:58:09,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:58:09,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:58:09,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:58:09,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 89 flow [2022-12-13 13:58:09,646 INFO L130 PetriNetUnfolder]: 2/53 cut-off events. [2022-12-13 13:58:09,646 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:09,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 2/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2022-12-13 13:58:09,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 42 transitions, 89 flow [2022-12-13 13:58:09,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 89 flow [2022-12-13 13:58:09,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:58:09,663 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 42 transitions, 89 flow [2022-12-13 13:58:09,665 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 42 transitions, 89 flow [2022-12-13 13:58:09,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 89 flow [2022-12-13 13:58:09,675 INFO L130 PetriNetUnfolder]: 2/53 cut-off events. [2022-12-13 13:58:09,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:09,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 2/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2022-12-13 13:58:09,676 INFO L119 LiptonReduction]: Number of co-enabled transitions 280 [2022-12-13 13:58:10,532 INFO L134 LiptonReduction]: Checked pairs total: 232 [2022-12-13 13:58:10,533 INFO L136 LiptonReduction]: Total number of compositions: 38 [2022-12-13 13:58:10,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:58:10,550 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:58:10,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 13:58:10,552 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 13:58:10,553 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:10,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:10,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:58:10,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:58:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash 5651542, now seen corresponding path program 1 times [2022-12-13 13:58:10,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:10,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868056941] [2022-12-13 13:58:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:10,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:10,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:10,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868056941] [2022-12-13 13:58:10,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868056941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:10,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:10,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:58:10,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813700162] [2022-12-13 13:58:10,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:10,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:58:10,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:58:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:58:10,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2022-12-13 13:58:10,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:10,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:10,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2022-12-13 13:58:10,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:10,713 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2022-12-13 13:58:10,713 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:10,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2022-12-13 13:58:10,714 INFO L137 encePairwiseOnDemand]: 78/80 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2022-12-13 13:58:10,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2022-12-13 13:58:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:58:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:58:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 81 transitions. [2022-12-13 13:58:10,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.50625 [2022-12-13 13:58:10,726 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 81 transitions. [2022-12-13 13:58:10,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 81 transitions. [2022-12-13 13:58:10,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:10,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 81 transitions. [2022-12-13 13:58:10,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:10,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:10,736 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:10,737 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 81 transitions. [2022-12-13 13:58:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2022-12-13 13:58:10,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:58:10,741 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2022-12-13 13:58:10,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2022-12-13 13:58:10,746 INFO L288 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2022-12-13 13:58:10,747 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2022-12-13 13:58:10,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:10,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:10,747 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 13:58:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:58:10,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:58:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1136154668, now seen corresponding path program 1 times [2022-12-13 13:58:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162955878] [2022-12-13 13:58:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:10,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:58:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:10,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:58:10,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:58:10,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 13:58:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 13:58:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 13:58:10,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:58:10,809 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 13:58:10,811 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:58:10,811 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 13:58:10,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:58:10,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 53 transitions, 118 flow [2022-12-13 13:58:10,839 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-12-13 13:58:10,839 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:58:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 3/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-12-13 13:58:10,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 53 transitions, 118 flow [2022-12-13 13:58:10,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 118 flow [2022-12-13 13:58:10,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:58:10,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 53 transitions, 118 flow [2022-12-13 13:58:10,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 53 transitions, 118 flow [2022-12-13 13:58:10,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 53 transitions, 118 flow [2022-12-13 13:58:10,855 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-12-13 13:58:10,855 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:58:10,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 3/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-12-13 13:58:10,857 INFO L119 LiptonReduction]: Number of co-enabled transitions 780 [2022-12-13 13:58:11,459 INFO L134 LiptonReduction]: Checked pairs total: 955 [2022-12-13 13:58:11,459 INFO L136 LiptonReduction]: Total number of compositions: 40 [2022-12-13 13:58:11,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:58:11,462 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:58:11,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 13:58:11,464 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2022-12-13 13:58:11,464 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:11,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:11,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:58:11,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:58:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:11,464 INFO L85 PathProgramCache]: Analyzing trace with hash 274412925, now seen corresponding path program 1 times [2022-12-13 13:58:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80519476] [2022-12-13 13:58:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:11,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80519476] [2022-12-13 13:58:11,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80519476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:11,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:11,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146262526] [2022-12-13 13:58:11,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:11,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:11,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2022-12-13 13:58:11,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:11,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2022-12-13 13:58:11,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:11,544 INFO L130 PetriNetUnfolder]: 42/97 cut-off events. [2022-12-13 13:58:11,544 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 13:58:11,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 97 events. 42/97 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 411 event pairs, 16 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 47 conditions per place. [2022-12-13 13:58:11,545 INFO L137 encePairwiseOnDemand]: 88/93 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2022-12-13 13:58:11,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 87 flow [2022-12-13 13:58:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2022-12-13 13:58:11,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4874551971326165 [2022-12-13 13:58:11,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2022-12-13 13:58:11,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2022-12-13 13:58:11,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:11,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2022-12-13 13:58:11,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,549 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 136 transitions. [2022-12-13 13:58:11,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 87 flow [2022-12-13 13:58:11,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 85 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 13:58:11,550 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 58 flow [2022-12-13 13:58:11,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-12-13 13:58:11,550 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2022-12-13 13:58:11,550 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 58 flow [2022-12-13 13:58:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:11,551 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:58:11,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:58:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -154777297, now seen corresponding path program 1 times [2022-12-13 13:58:11,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:11,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633546699] [2022-12-13 13:58:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:11,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633546699] [2022-12-13 13:58:11,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633546699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:11,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:11,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:11,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774487700] [2022-12-13 13:58:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:11,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2022-12-13 13:58:11,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:11,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2022-12-13 13:58:11,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:11,624 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2022-12-13 13:58:11,625 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:58:11,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 391 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 98. Up to 41 conditions per place. [2022-12-13 13:58:11,626 INFO L137 encePairwiseOnDemand]: 89/93 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2022-12-13 13:58:11,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 104 flow [2022-12-13 13:58:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2022-12-13 13:58:11,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2022-12-13 13:58:11,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2022-12-13 13:58:11,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2022-12-13 13:58:11,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:11,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2022-12-13 13:58:11,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,631 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 58 flow. Second operand 3 states and 132 transitions. [2022-12-13 13:58:11,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 104 flow [2022-12-13 13:58:11,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:11,633 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 80 flow [2022-12-13 13:58:11,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2022-12-13 13:58:11,634 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2022-12-13 13:58:11,634 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 80 flow [2022-12-13 13:58:11,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:11,634 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:58:11,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:58:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash -502145999, now seen corresponding path program 1 times [2022-12-13 13:58:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:11,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332952656] [2022-12-13 13:58:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:58:11,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:11,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332952656] [2022-12-13 13:58:11,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332952656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:11,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:11,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948197493] [2022-12-13 13:58:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:11,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:11,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2022-12-13 13:58:11,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:11,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2022-12-13 13:58:11,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:11,784 INFO L130 PetriNetUnfolder]: 29/78 cut-off events. [2022-12-13 13:58:11,785 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 13:58:11,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 313 event pairs, 6 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 192. Up to 61 conditions per place. [2022-12-13 13:58:11,786 INFO L137 encePairwiseOnDemand]: 91/93 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2022-12-13 13:58:11,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 121 flow [2022-12-13 13:58:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2022-12-13 13:58:11,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2022-12-13 13:58:11,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2022-12-13 13:58:11,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2022-12-13 13:58:11,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:11,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2022-12-13 13:58:11,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,789 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 80 flow. Second operand 3 states and 131 transitions. [2022-12-13 13:58:11,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 121 flow [2022-12-13 13:58:11,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:11,790 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 72 flow [2022-12-13 13:58:11,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2022-12-13 13:58:11,791 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2022-12-13 13:58:11,791 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 72 flow [2022-12-13 13:58:11,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:11,791 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:58:11,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:58:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -503127159, now seen corresponding path program 1 times [2022-12-13 13:58:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:11,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086556168] [2022-12-13 13:58:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:11,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086556168] [2022-12-13 13:58:11,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086556168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:11,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:11,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313636541] [2022-12-13 13:58:11,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:11,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:11,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:11,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2022-12-13 13:58:11,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:11,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2022-12-13 13:58:11,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:11,863 INFO L130 PetriNetUnfolder]: 25/76 cut-off events. [2022-12-13 13:58:11,863 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-12-13 13:58:11,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 76 events. 25/76 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 297 event pairs, 8 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 94. Up to 45 conditions per place. [2022-12-13 13:58:11,864 INFO L137 encePairwiseOnDemand]: 91/93 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2022-12-13 13:58:11,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 102 flow [2022-12-13 13:58:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2022-12-13 13:58:11,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2022-12-13 13:58:11,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2022-12-13 13:58:11,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2022-12-13 13:58:11,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:11,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2022-12-13 13:58:11,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,868 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 72 flow. Second operand 3 states and 129 transitions. [2022-12-13 13:58:11,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 102 flow [2022-12-13 13:58:11,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:11,868 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 70 flow [2022-12-13 13:58:11,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2022-12-13 13:58:11,869 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2022-12-13 13:58:11,869 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 70 flow [2022-12-13 13:58:11,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:11,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:11,870 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 13:58:11,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:58:11,870 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:58:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1581134617, now seen corresponding path program 1 times [2022-12-13 13:58:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:11,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868947248] [2022-12-13 13:58:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:11,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:11,878 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:58:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:11,885 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:58:11,885 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:58:11,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 13:58:11,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 13:58:11,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 13:58:11,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 13:58:11,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:58:11,886 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 13:58:11,886 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:58:11,887 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 13:58:11,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:58:11,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2022-12-13 13:58:11,912 INFO L130 PetriNetUnfolder]: 4/101 cut-off events. [2022-12-13 13:58:11,912 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 13:58:11,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 101 events. 4/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2022-12-13 13:58:11,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2022-12-13 13:58:11,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2022-12-13 13:58:11,913 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:58:11,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2022-12-13 13:58:11,914 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2022-12-13 13:58:11,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2022-12-13 13:58:11,920 INFO L130 PetriNetUnfolder]: 4/101 cut-off events. [2022-12-13 13:58:11,920 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 13:58:11,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 101 events. 4/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2022-12-13 13:58:11,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 1500 [2022-12-13 13:58:12,674 INFO L134 LiptonReduction]: Checked pairs total: 2270 [2022-12-13 13:58:12,674 INFO L136 LiptonReduction]: Total number of compositions: 47 [2022-12-13 13:58:12,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:58:12,677 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:58:12,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 13:58:12,678 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2022-12-13 13:58:12,678 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:12,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:12,679 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:58:12,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 390830429, now seen corresponding path program 1 times [2022-12-13 13:58:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:12,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439394346] [2022-12-13 13:58:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:12,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:12,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:12,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439394346] [2022-12-13 13:58:12,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439394346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:12,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:12,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:12,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602286142] [2022-12-13 13:58:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:12,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:12,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:12,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2022-12-13 13:58:12,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:12,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2022-12-13 13:58:12,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:12,785 INFO L130 PetriNetUnfolder]: 370/649 cut-off events. [2022-12-13 13:58:12,785 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2022-12-13 13:58:12,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 649 events. 370/649 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3497 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 328. Up to 363 conditions per place. [2022-12-13 13:58:12,788 INFO L137 encePairwiseOnDemand]: 105/111 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-12-13 13:58:12,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 135 flow [2022-12-13 13:58:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2022-12-13 13:58:12,790 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2022-12-13 13:58:12,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2022-12-13 13:58:12,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2022-12-13 13:58:12,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:12,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2022-12-13 13:58:12,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,793 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 3 states and 165 transitions. [2022-12-13 13:58:12,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 135 flow [2022-12-13 13:58:12,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 127 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 13:58:12,794 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 79 flow [2022-12-13 13:58:12,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-12-13 13:58:12,795 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-12-13 13:58:12,795 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 79 flow [2022-12-13 13:58:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:12,795 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:12,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:58:12,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1722004183, now seen corresponding path program 1 times [2022-12-13 13:58:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:12,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233106238] [2022-12-13 13:58:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:12,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:12,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233106238] [2022-12-13 13:58:12,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233106238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:12,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:12,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:12,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604995548] [2022-12-13 13:58:12,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:12,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:12,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2022-12-13 13:58:12,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:12,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2022-12-13 13:58:12,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:12,897 INFO L130 PetriNetUnfolder]: 432/765 cut-off events. [2022-12-13 13:58:12,897 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2022-12-13 13:58:12,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4388 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 950. Up to 429 conditions per place. [2022-12-13 13:58:12,900 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2022-12-13 13:58:12,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 180 flow [2022-12-13 13:58:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2022-12-13 13:58:12,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2022-12-13 13:58:12,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2022-12-13 13:58:12,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2022-12-13 13:58:12,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:12,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2022-12-13 13:58:12,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,905 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 79 flow. Second operand 3 states and 162 transitions. [2022-12-13 13:58:12,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 180 flow [2022-12-13 13:58:12,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:12,915 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 119 flow [2022-12-13 13:58:12,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2022-12-13 13:58:12,916 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2022-12-13 13:58:12,916 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 119 flow [2022-12-13 13:58:12,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:12,916 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:12,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:58:12,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1843731995, now seen corresponding path program 1 times [2022-12-13 13:58:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064366830] [2022-12-13 13:58:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:12,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:58:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064366830] [2022-12-13 13:58:12,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064366830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:12,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:12,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449439380] [2022-12-13 13:58:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:12,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2022-12-13 13:58:12,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:12,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:12,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2022-12-13 13:58:12,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:13,042 INFO L130 PetriNetUnfolder]: 352/619 cut-off events. [2022-12-13 13:58:13,042 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2022-12-13 13:58:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3518 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1834. Up to 512 conditions per place. [2022-12-13 13:58:13,047 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-12-13 13:58:13,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 225 flow [2022-12-13 13:58:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2022-12-13 13:58:13,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2022-12-13 13:58:13,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2022-12-13 13:58:13,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2022-12-13 13:58:13,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:13,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2022-12-13 13:58:13,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,050 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 119 flow. Second operand 3 states and 161 transitions. [2022-12-13 13:58:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 225 flow [2022-12-13 13:58:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:13,054 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 107 flow [2022-12-13 13:58:13,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2022-12-13 13:58:13,054 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2022-12-13 13:58:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 107 flow [2022-12-13 13:58:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:13,055 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:58:13,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1842523935, now seen corresponding path program 1 times [2022-12-13 13:58:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:13,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617680502] [2022-12-13 13:58:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:13,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617680502] [2022-12-13 13:58:13,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617680502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:13,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369665781] [2022-12-13 13:58:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:13,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:13,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:13,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2022-12-13 13:58:13,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:13,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2022-12-13 13:58:13,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:13,163 INFO L130 PetriNetUnfolder]: 285/518 cut-off events. [2022-12-13 13:58:13,163 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2022-12-13 13:58:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2891 event pairs, 51 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 778. Up to 412 conditions per place. [2022-12-13 13:58:13,165 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2022-12-13 13:58:13,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 192 flow [2022-12-13 13:58:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2022-12-13 13:58:13,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4744744744744745 [2022-12-13 13:58:13,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2022-12-13 13:58:13,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2022-12-13 13:58:13,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:13,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2022-12-13 13:58:13,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,167 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 107 flow. Second operand 3 states and 158 transitions. [2022-12-13 13:58:13,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 192 flow [2022-12-13 13:58:13,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:13,169 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 105 flow [2022-12-13 13:58:13,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2022-12-13 13:58:13,169 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2022-12-13 13:58:13,169 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 105 flow [2022-12-13 13:58:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:13,169 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:13,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:58:13,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:13,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1420620420, now seen corresponding path program 1 times [2022-12-13 13:58:13,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:13,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913345757] [2022-12-13 13:58:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:13,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:58:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913345757] [2022-12-13 13:58:13,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913345757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:13,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:13,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908125921] [2022-12-13 13:58:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:13,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:13,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2022-12-13 13:58:13,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:13,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2022-12-13 13:58:13,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:13,262 INFO L130 PetriNetUnfolder]: 284/582 cut-off events. [2022-12-13 13:58:13,262 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2022-12-13 13:58:13,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 582 events. 284/582 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3494 event pairs, 140 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 904. Up to 341 conditions per place. [2022-12-13 13:58:13,265 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2022-12-13 13:58:13,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 213 flow [2022-12-13 13:58:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2022-12-13 13:58:13,266 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2022-12-13 13:58:13,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2022-12-13 13:58:13,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2022-12-13 13:58:13,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:13,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2022-12-13 13:58:13,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,267 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 105 flow. Second operand 3 states and 157 transitions. [2022-12-13 13:58:13,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 213 flow [2022-12-13 13:58:13,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:13,268 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 181 flow [2022-12-13 13:58:13,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-12-13 13:58:13,268 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2022-12-13 13:58:13,268 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 181 flow [2022-12-13 13:58:13,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:13,269 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:58:13,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1089557553, now seen corresponding path program 1 times [2022-12-13 13:58:13,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:13,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899514701] [2022-12-13 13:58:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:13,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:58:13,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:13,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899514701] [2022-12-13 13:58:13,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899514701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:13,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:13,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:13,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341793264] [2022-12-13 13:58:13,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:13,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:13,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:13,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2022-12-13 13:58:13,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:13,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2022-12-13 13:58:13,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:13,431 INFO L130 PetriNetUnfolder]: 237/505 cut-off events. [2022-12-13 13:58:13,431 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2022-12-13 13:58:13,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 505 events. 237/505 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2997 event pairs, 79 based on Foata normal form. 30/530 useless extension candidates. Maximal degree in co-relation 924. Up to 316 conditions per place. [2022-12-13 13:58:13,435 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2022-12-13 13:58:13,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 273 flow [2022-12-13 13:58:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2022-12-13 13:58:13,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2022-12-13 13:58:13,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2022-12-13 13:58:13,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2022-12-13 13:58:13,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:13,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2022-12-13 13:58:13,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,443 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 181 flow. Second operand 3 states and 155 transitions. [2022-12-13 13:58:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 273 flow [2022-12-13 13:58:13,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:13,444 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 167 flow [2022-12-13 13:58:13,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 13:58:13,445 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2022-12-13 13:58:13,445 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 167 flow [2022-12-13 13:58:13,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:13,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:13,445 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 13:58:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:58:13,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:58:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash 581135631, now seen corresponding path program 1 times [2022-12-13 13:58:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:13,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440724433] [2022-12-13 13:58:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:13,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:58:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:13,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:58:13,459 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:58:13,459 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 13:58:13,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 13:58:13,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 13:58:13,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 13:58:13,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 13:58:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:58:13,459 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:13,460 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:58:13,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 13:58:13,469 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:58:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 182 flow [2022-12-13 13:58:13,476 INFO L130 PetriNetUnfolder]: 5/125 cut-off events. [2022-12-13 13:58:13,477 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 13:58:13,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 125 events. 5/125 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2022-12-13 13:58:13,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 182 flow [2022-12-13 13:58:13,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 75 transitions, 182 flow [2022-12-13 13:58:13,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:58:13,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 182 flow [2022-12-13 13:58:13,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 182 flow [2022-12-13 13:58:13,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 182 flow [2022-12-13 13:58:13,484 INFO L130 PetriNetUnfolder]: 5/125 cut-off events. [2022-12-13 13:58:13,485 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 13:58:13,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 125 events. 5/125 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2022-12-13 13:58:13,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 2440 [2022-12-13 13:58:14,364 INFO L134 LiptonReduction]: Checked pairs total: 3720 [2022-12-13 13:58:14,364 INFO L136 LiptonReduction]: Total number of compositions: 54 [2022-12-13 13:58:14,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:58:14,366 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:58:14,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 13:58:14,367 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2022-12-13 13:58:14,368 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:14,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:14,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:58:14,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash 524395549, now seen corresponding path program 1 times [2022-12-13 13:58:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:14,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058988352] [2022-12-13 13:58:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:14,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058988352] [2022-12-13 13:58:14,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058988352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:14,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:14,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:14,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168385041] [2022-12-13 13:58:14,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:14,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:14,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:14,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:14,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:14,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:14,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:14,678 INFO L130 PetriNetUnfolder]: 2300/3511 cut-off events. [2022-12-13 13:58:14,678 INFO L131 PetriNetUnfolder]: For 1374/1374 co-relation queries the response was YES. [2022-12-13 13:58:14,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7619 conditions, 3511 events. 2300/3511 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20895 event pairs, 1224 based on Foata normal form. 0/2580 useless extension candidates. Maximal degree in co-relation 1418. Up to 2129 conditions per place. [2022-12-13 13:58:14,700 INFO L137 encePairwiseOnDemand]: 122/129 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2022-12-13 13:58:14,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 187 flow [2022-12-13 13:58:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2022-12-13 13:58:14,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2022-12-13 13:58:14,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2022-12-13 13:58:14,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2022-12-13 13:58:14,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:14,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2022-12-13 13:58:14,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:14,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:14,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:14,703 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 3 states and 194 transitions. [2022-12-13 13:58:14,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 187 flow [2022-12-13 13:58:14,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 13:58:14,705 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 100 flow [2022-12-13 13:58:14,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2022-12-13 13:58:14,705 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2022-12-13 13:58:14,705 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 100 flow [2022-12-13 13:58:14,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:14,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:14,706 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:14,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 13:58:14,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:14,706 INFO L85 PathProgramCache]: Analyzing trace with hash 20050319, now seen corresponding path program 1 times [2022-12-13 13:58:14,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:14,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351124618] [2022-12-13 13:58:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351124618] [2022-12-13 13:58:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351124618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:14,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49960795] [2022-12-13 13:58:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:14,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:14,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:14,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:14,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:15,136 INFO L130 PetriNetUnfolder]: 3060/4717 cut-off events. [2022-12-13 13:58:15,136 INFO L131 PetriNetUnfolder]: For 2755/2755 co-relation queries the response was YES. [2022-12-13 13:58:15,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 30038 event pairs, 1352 based on Foata normal form. 0/3843 useless extension candidates. Maximal degree in co-relation 5760. Up to 2885 conditions per place. [2022-12-13 13:58:15,182 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2022-12-13 13:58:15,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 242 flow [2022-12-13 13:58:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2022-12-13 13:58:15,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2022-12-13 13:58:15,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2022-12-13 13:58:15,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2022-12-13 13:58:15,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:15,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2022-12-13 13:58:15,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,187 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 100 flow. Second operand 3 states and 191 transitions. [2022-12-13 13:58:15,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 242 flow [2022-12-13 13:58:15,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:15,198 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 158 flow [2022-12-13 13:58:15,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-12-13 13:58:15,199 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2022-12-13 13:58:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 158 flow [2022-12-13 13:58:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:15,200 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:58:15,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash 622913270, now seen corresponding path program 1 times [2022-12-13 13:58:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:15,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410731590] [2022-12-13 13:58:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:58:15,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410731590] [2022-12-13 13:58:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410731590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:15,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:15,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47794956] [2022-12-13 13:58:15,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:15,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:15,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:15,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:15,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:15,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:15,532 INFO L130 PetriNetUnfolder]: 2474/3707 cut-off events. [2022-12-13 13:58:15,532 INFO L131 PetriNetUnfolder]: For 3413/3413 co-relation queries the response was YES. [2022-12-13 13:58:15,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 22754 event pairs, 472 based on Foata normal form. 0/3175 useless extension candidates. Maximal degree in co-relation 11105. Up to 3026 conditions per place. [2022-12-13 13:58:15,548 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 13:58:15,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 321 flow [2022-12-13 13:58:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2022-12-13 13:58:15,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2022-12-13 13:58:15,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2022-12-13 13:58:15,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2022-12-13 13:58:15,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:15,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2022-12-13 13:58:15,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,551 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 158 flow. Second operand 3 states and 190 transitions. [2022-12-13 13:58:15,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 321 flow [2022-12-13 13:58:15,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:15,558 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 142 flow [2022-12-13 13:58:15,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-12-13 13:58:15,558 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2022-12-13 13:58:15,558 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 142 flow [2022-12-13 13:58:15,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:15,558 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:15,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:58:15,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash 621561990, now seen corresponding path program 1 times [2022-12-13 13:58:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483713623] [2022-12-13 13:58:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:15,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:15,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483713623] [2022-12-13 13:58:15,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483713623] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:15,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:15,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468040202] [2022-12-13 13:58:15,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:15,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:15,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:15,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:15,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:15,900 INFO L130 PetriNetUnfolder]: 1993/3029 cut-off events. [2022-12-13 13:58:15,900 INFO L131 PetriNetUnfolder]: For 2304/2304 co-relation queries the response was YES. [2022-12-13 13:58:15,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18194 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 4399. Up to 2450 conditions per place. [2022-12-13 13:58:15,912 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-12-13 13:58:15,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 282 flow [2022-12-13 13:58:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2022-12-13 13:58:15,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2022-12-13 13:58:15,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2022-12-13 13:58:15,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2022-12-13 13:58:15,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:15,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2022-12-13 13:58:15,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,915 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 142 flow. Second operand 3 states and 187 transitions. [2022-12-13 13:58:15,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 282 flow [2022-12-13 13:58:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:15,916 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 140 flow [2022-12-13 13:58:15,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-12-13 13:58:15,916 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2022-12-13 13:58:15,916 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 140 flow [2022-12-13 13:58:15,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:15,917 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:15,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:58:15,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:15,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:15,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1491473409, now seen corresponding path program 1 times [2022-12-13 13:58:15,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:15,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417509220] [2022-12-13 13:58:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:15,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:58:15,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:15,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417509220] [2022-12-13 13:58:15,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417509220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:15,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:15,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803096851] [2022-12-13 13:58:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:15,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:15,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:15,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:15,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:15,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:16,249 INFO L130 PetriNetUnfolder]: 2430/3913 cut-off events. [2022-12-13 13:58:16,249 INFO L131 PetriNetUnfolder]: For 3547/3547 co-relation queries the response was YES. [2022-12-13 13:58:16,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 25942 event pairs, 988 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 6586. Up to 2459 conditions per place. [2022-12-13 13:58:16,269 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2022-12-13 13:58:16,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 311 flow [2022-12-13 13:58:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2022-12-13 13:58:16,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2022-12-13 13:58:16,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2022-12-13 13:58:16,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2022-12-13 13:58:16,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:16,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2022-12-13 13:58:16,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,272 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 140 flow. Second operand 3 states and 186 transitions. [2022-12-13 13:58:16,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 311 flow [2022-12-13 13:58:16,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:16,275 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 264 flow [2022-12-13 13:58:16,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-12-13 13:58:16,275 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2022-12-13 13:58:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 264 flow [2022-12-13 13:58:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:16,276 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:58:16,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1008967702, now seen corresponding path program 1 times [2022-12-13 13:58:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131454530] [2022-12-13 13:58:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:58:16,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:16,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131454530] [2022-12-13 13:58:16,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131454530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:16,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:16,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:16,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466210059] [2022-12-13 13:58:16,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:16,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:16,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:16,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:16,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:16,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:16,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:16,676 INFO L130 PetriNetUnfolder]: 1955/3099 cut-off events. [2022-12-13 13:58:16,676 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2022-12-13 13:58:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11103 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19784 event pairs, 409 based on Foata normal form. 204/3062 useless extension candidates. Maximal degree in co-relation 6139. Up to 2442 conditions per place. [2022-12-13 13:58:16,692 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2022-12-13 13:58:16,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 447 flow [2022-12-13 13:58:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2022-12-13 13:58:16,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2022-12-13 13:58:16,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2022-12-13 13:58:16,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2022-12-13 13:58:16,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:16,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2022-12-13 13:58:16,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,695 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 264 flow. Second operand 3 states and 184 transitions. [2022-12-13 13:58:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 447 flow [2022-12-13 13:58:16,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:16,700 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 242 flow [2022-12-13 13:58:16,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2022-12-13 13:58:16,700 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2022-12-13 13:58:16,700 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 242 flow [2022-12-13 13:58:16,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:16,700 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 13:58:16,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash -839201739, now seen corresponding path program 1 times [2022-12-13 13:58:16,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:16,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708987145] [2022-12-13 13:58:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:16,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 13:58:16,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708987145] [2022-12-13 13:58:16,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708987145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:16,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:16,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:16,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260208222] [2022-12-13 13:58:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:16,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:16,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:16,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:16,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:16,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:16,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:16,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:16,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:16,983 INFO L130 PetriNetUnfolder]: 2132/3676 cut-off events. [2022-12-13 13:58:16,983 INFO L131 PetriNetUnfolder]: For 5429/5429 co-relation queries the response was YES. [2022-12-13 13:58:16,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12139 conditions, 3676 events. 2132/3676 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 25974 event pairs, 890 based on Foata normal form. 0/3492 useless extension candidates. Maximal degree in co-relation 6087. Up to 2397 conditions per place. [2022-12-13 13:58:17,000 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2022-12-13 13:58:17,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 490 flow [2022-12-13 13:58:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-12-13 13:58:17,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2022-12-13 13:58:17,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-12-13 13:58:17,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-12-13 13:58:17,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:17,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-12-13 13:58:17,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,004 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 242 flow. Second operand 3 states and 183 transitions. [2022-12-13 13:58:17,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 490 flow [2022-12-13 13:58:17,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:17,007 INFO L231 Difference]: Finished difference. Result has 40 places, 50 transitions, 460 flow [2022-12-13 13:58:17,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=460, PETRI_PLACES=40, PETRI_TRANSITIONS=50} [2022-12-13 13:58:17,007 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2022-12-13 13:58:17,007 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 50 transitions, 460 flow [2022-12-13 13:58:17,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:17,008 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:17,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:58:17,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash -245447432, now seen corresponding path program 1 times [2022-12-13 13:58:17,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:17,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617090536] [2022-12-13 13:58:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:17,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 13:58:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:17,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617090536] [2022-12-13 13:58:17,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617090536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:17,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065488383] [2022-12-13 13:58:17,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:17,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 129 [2022-12-13 13:58:17,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 50 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:17,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 129 [2022-12-13 13:58:17,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:17,344 INFO L130 PetriNetUnfolder]: 1771/3145 cut-off events. [2022-12-13 13:58:17,344 INFO L131 PetriNetUnfolder]: For 7685/7685 co-relation queries the response was YES. [2022-12-13 13:58:17,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 3145 events. 1771/3145 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22227 event pairs, 569 based on Foata normal form. 170/3302 useless extension candidates. Maximal degree in co-relation 6082. Up to 1944 conditions per place. [2022-12-13 13:58:17,356 INFO L137 encePairwiseOnDemand]: 127/129 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2022-12-13 13:58:17,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 705 flow [2022-12-13 13:58:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2022-12-13 13:58:17,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2022-12-13 13:58:17,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2022-12-13 13:58:17,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2022-12-13 13:58:17,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:17,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2022-12-13 13:58:17,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,360 INFO L175 Difference]: Start difference. First operand has 40 places, 50 transitions, 460 flow. Second operand 3 states and 181 transitions. [2022-12-13 13:58:17,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 705 flow [2022-12-13 13:58:17,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 663 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:17,365 INFO L231 Difference]: Finished difference. Result has 39 places, 49 transitions, 430 flow [2022-12-13 13:58:17,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=39, PETRI_TRANSITIONS=49} [2022-12-13 13:58:17,365 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2022-12-13 13:58:17,366 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 49 transitions, 430 flow [2022-12-13 13:58:17,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:17,366 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:17,366 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:17,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 13:58:17,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:58:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash 978079021, now seen corresponding path program 1 times [2022-12-13 13:58:17,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:17,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034906415] [2022-12-13 13:58:17,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:17,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:17,375 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:58:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:17,381 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:58:17,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:58:17,381 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 13:58:17,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 13:58:17,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 13:58:17,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 13:58:17,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 13:58:17,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 13:58:17,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 13:58:17,382 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:17,382 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:58:17,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 13:58:17,396 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:58:17,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 86 transitions, 217 flow [2022-12-13 13:58:17,405 INFO L130 PetriNetUnfolder]: 6/149 cut-off events. [2022-12-13 13:58:17,405 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 13:58:17,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 149 events. 6/149 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 267 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2022-12-13 13:58:17,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 86 transitions, 217 flow [2022-12-13 13:58:17,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 86 transitions, 217 flow [2022-12-13 13:58:17,406 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:58:17,406 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 86 transitions, 217 flow [2022-12-13 13:58:17,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 86 transitions, 217 flow [2022-12-13 13:58:17,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 86 transitions, 217 flow [2022-12-13 13:58:17,414 INFO L130 PetriNetUnfolder]: 6/149 cut-off events. [2022-12-13 13:58:17,414 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 13:58:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 149 events. 6/149 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 267 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2022-12-13 13:58:17,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 3600 [2022-12-13 13:58:18,342 INFO L134 LiptonReduction]: Checked pairs total: 5888 [2022-12-13 13:58:18,342 INFO L136 LiptonReduction]: Total number of compositions: 61 [2022-12-13 13:58:18,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:58:18,344 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:58:18,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:58:18,345 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2022-12-13 13:58:18,345 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:18,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:18,345 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:58:18,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash 675197814, now seen corresponding path program 1 times [2022-12-13 13:58:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711364149] [2022-12-13 13:58:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:18,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711364149] [2022-12-13 13:58:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711364149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:18,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:18,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:18,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936318715] [2022-12-13 13:58:18,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:18,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:18,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:18,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:18,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:18,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:18,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:18,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:19,345 INFO L130 PetriNetUnfolder]: 12384/17359 cut-off events. [2022-12-13 13:58:19,345 INFO L131 PetriNetUnfolder]: For 8948/8948 co-relation queries the response was YES. [2022-12-13 13:58:19,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37925 conditions, 17359 events. 12384/17359 cut-off events. For 8948/8948 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107481 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 7783. Up to 11057 conditions per place. [2022-12-13 13:58:19,400 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2022-12-13 13:58:19,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 243 flow [2022-12-13 13:58:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-12-13 13:58:19,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2022-12-13 13:58:19,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-12-13 13:58:19,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-12-13 13:58:19,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:19,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-12-13 13:58:19,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:19,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:19,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:19,403 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 97 flow. Second operand 3 states and 223 transitions. [2022-12-13 13:58:19,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 243 flow [2022-12-13 13:58:19,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 211 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-12-13 13:58:19,408 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 121 flow [2022-12-13 13:58:19,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 13:58:19,408 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2022-12-13 13:58:19,409 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 121 flow [2022-12-13 13:58:19,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:19,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:19,409 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:19,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 13:58:19,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -32118324, now seen corresponding path program 1 times [2022-12-13 13:58:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:19,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028145547] [2022-12-13 13:58:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:19,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028145547] [2022-12-13 13:58:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028145547] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:19,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328395323] [2022-12-13 13:58:19,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:19,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:19,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:19,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:19,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:19,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:20,981 INFO L130 PetriNetUnfolder]: 17214/24347 cut-off events. [2022-12-13 13:58:20,981 INFO L131 PetriNetUnfolder]: For 13763/13763 co-relation queries the response was YES. [2022-12-13 13:58:21,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62070 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 161452 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 29432. Up to 15695 conditions per place. [2022-12-13 13:58:21,111 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2022-12-13 13:58:21,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 304 flow [2022-12-13 13:58:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2022-12-13 13:58:21,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4988662131519274 [2022-12-13 13:58:21,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2022-12-13 13:58:21,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2022-12-13 13:58:21,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:21,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2022-12-13 13:58:21,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:21,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:21,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:21,115 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 121 flow. Second operand 3 states and 220 transitions. [2022-12-13 13:58:21,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 304 flow [2022-12-13 13:58:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:21,223 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 197 flow [2022-12-13 13:58:21,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2022-12-13 13:58:21,224 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2022-12-13 13:58:21,224 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 197 flow [2022-12-13 13:58:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:21,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:21,225 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:21,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 13:58:21,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash -994081475, now seen corresponding path program 1 times [2022-12-13 13:58:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:21,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395357377] [2022-12-13 13:58:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:21,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:58:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:21,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395357377] [2022-12-13 13:58:21,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395357377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:21,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:21,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313570348] [2022-12-13 13:58:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:21,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:21,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:21,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:21,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:21,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:22,340 INFO L130 PetriNetUnfolder]: 13946/19127 cut-off events. [2022-12-13 13:58:22,341 INFO L131 PetriNetUnfolder]: For 17220/17220 co-relation queries the response was YES. [2022-12-13 13:58:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56975 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 120771 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56920. Up to 15496 conditions per place. [2022-12-13 13:58:22,459 INFO L137 encePairwiseOnDemand]: 145/147 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-12-13 13:58:22,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 409 flow [2022-12-13 13:58:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2022-12-13 13:58:22,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2022-12-13 13:58:22,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2022-12-13 13:58:22,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2022-12-13 13:58:22,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:22,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2022-12-13 13:58:22,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:22,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:22,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:22,464 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 197 flow. Second operand 3 states and 219 transitions. [2022-12-13 13:58:22,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 409 flow [2022-12-13 13:58:22,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:22,540 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 177 flow [2022-12-13 13:58:22,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-12-13 13:58:22,540 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2022-12-13 13:58:22,540 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 177 flow [2022-12-13 13:58:22,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:22,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:22,541 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 13:58:22,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -995664345, now seen corresponding path program 1 times [2022-12-13 13:58:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:22,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894408894] [2022-12-13 13:58:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:22,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:22,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894408894] [2022-12-13 13:58:22,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894408894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:22,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:22,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:22,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613083908] [2022-12-13 13:58:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:22,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:22,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:22,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:22,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:22,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:22,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:22,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:23,574 INFO L130 PetriNetUnfolder]: 11269/15577 cut-off events. [2022-12-13 13:58:23,574 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2022-12-13 13:58:23,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44879 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 95990 event pairs, 1895 based on Foata normal form. 0/12813 useless extension candidates. Maximal degree in co-relation 23207. Up to 12576 conditions per place. [2022-12-13 13:58:23,654 INFO L137 encePairwiseOnDemand]: 145/147 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-12-13 13:58:23,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 364 flow [2022-12-13 13:58:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2022-12-13 13:58:23,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2022-12-13 13:58:23,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2022-12-13 13:58:23,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2022-12-13 13:58:23,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:23,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2022-12-13 13:58:23,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:23,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:23,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:23,658 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 177 flow. Second operand 3 states and 216 transitions. [2022-12-13 13:58:23,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 364 flow [2022-12-13 13:58:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:23,662 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 175 flow [2022-12-13 13:58:23,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-12-13 13:58:23,663 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2022-12-13 13:58:23,663 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 175 flow [2022-12-13 13:58:23,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:23,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:23,664 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:23,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 13:58:23,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash 160197311, now seen corresponding path program 1 times [2022-12-13 13:58:23,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:23,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057728674] [2022-12-13 13:58:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:58:23,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:23,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057728674] [2022-12-13 13:58:23,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057728674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:23,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:23,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007729877] [2022-12-13 13:58:23,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:23,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:23,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:23,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:23,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:23,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:23,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:25,079 INFO L130 PetriNetUnfolder]: 14850/21601 cut-off events. [2022-12-13 13:58:25,079 INFO L131 PetriNetUnfolder]: For 20184/20184 co-relation queries the response was YES. [2022-12-13 13:58:25,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61589 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 149978 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 35418. Up to 14235 conditions per place. [2022-12-13 13:58:25,179 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2022-12-13 13:58:25,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 409 flow [2022-12-13 13:58:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-12-13 13:58:25,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4875283446712018 [2022-12-13 13:58:25,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-12-13 13:58:25,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-12-13 13:58:25,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:25,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-12-13 13:58:25,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:25,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:25,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:25,182 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 175 flow. Second operand 3 states and 215 transitions. [2022-12-13 13:58:25,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 409 flow [2022-12-13 13:58:25,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:25,186 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 347 flow [2022-12-13 13:58:25,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2022-12-13 13:58:25,186 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2022-12-13 13:58:25,186 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 347 flow [2022-12-13 13:58:25,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:25,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:25,187 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:25,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 13:58:25,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash 671152537, now seen corresponding path program 1 times [2022-12-13 13:58:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:25,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815227795] [2022-12-13 13:58:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:25,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:58:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815227795] [2022-12-13 13:58:25,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815227795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:25,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:25,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602981908] [2022-12-13 13:58:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:25,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:25,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:25,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:25,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:25,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:25,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:26,244 INFO L130 PetriNetUnfolder]: 11925/16849 cut-off events. [2022-12-13 13:58:26,244 INFO L131 PetriNetUnfolder]: For 28615/28615 co-relation queries the response was YES. [2022-12-13 13:58:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59534 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110467 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 33950. Up to 13484 conditions per place. [2022-12-13 13:58:26,318 INFO L137 encePairwiseOnDemand]: 145/147 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2022-12-13 13:58:26,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 619 flow [2022-12-13 13:58:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2022-12-13 13:58:26,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2022-12-13 13:58:26,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2022-12-13 13:58:26,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2022-12-13 13:58:26,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:26,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2022-12-13 13:58:26,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:26,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:26,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:26,320 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 347 flow. Second operand 3 states and 213 transitions. [2022-12-13 13:58:26,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 619 flow [2022-12-13 13:58:26,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:26,350 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 317 flow [2022-12-13 13:58:26,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2022-12-13 13:58:26,350 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2022-12-13 13:58:26,350 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 317 flow [2022-12-13 13:58:26,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:26,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:26,350 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:26,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 13:58:26,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2038508564, now seen corresponding path program 1 times [2022-12-13 13:58:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7447431] [2022-12-13 13:58:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 13:58:26,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7447431] [2022-12-13 13:58:26,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7447431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:26,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:26,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:26,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869026278] [2022-12-13 13:58:26,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:26,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:26,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:26,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:26,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:26,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:26,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:26,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:27,720 INFO L130 PetriNetUnfolder]: 14852/22111 cut-off events. [2022-12-13 13:58:27,720 INFO L131 PetriNetUnfolder]: For 37417/37417 co-relation queries the response was YES. [2022-12-13 13:58:27,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72697 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160820 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 41806. Up to 14769 conditions per place. [2022-12-13 13:58:27,821 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2022-12-13 13:58:27,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 684 flow [2022-12-13 13:58:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2022-12-13 13:58:27,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48072562358276644 [2022-12-13 13:58:27,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2022-12-13 13:58:27,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2022-12-13 13:58:27,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:27,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2022-12-13 13:58:27,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:27,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:27,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:27,824 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 317 flow. Second operand 3 states and 212 transitions. [2022-12-13 13:58:27,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 684 flow [2022-12-13 13:58:27,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:27,836 INFO L231 Difference]: Finished difference. Result has 46 places, 69 transitions, 647 flow [2022-12-13 13:58:27,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=46, PETRI_TRANSITIONS=69} [2022-12-13 13:58:27,837 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2022-12-13 13:58:27,837 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 69 transitions, 647 flow [2022-12-13 13:58:27,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:27,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:27,837 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:27,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 13:58:27,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1230740909, now seen corresponding path program 1 times [2022-12-13 13:58:27,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686475642] [2022-12-13 13:58:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 13:58:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686475642] [2022-12-13 13:58:27,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686475642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:27,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:27,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210911758] [2022-12-13 13:58:27,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:27,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:27,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:27,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:27,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:27,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:27,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:29,226 INFO L130 PetriNetUnfolder]: 11939/17421 cut-off events. [2022-12-13 13:58:29,226 INFO L131 PetriNetUnfolder]: For 46459/46459 co-relation queries the response was YES. [2022-12-13 13:58:29,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69793 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121099 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 39980. Up to 13486 conditions per place. [2022-12-13 13:58:29,327 INFO L137 encePairwiseOnDemand]: 145/147 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2022-12-13 13:58:29,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 1070 flow [2022-12-13 13:58:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-12-13 13:58:29,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-12-13 13:58:29,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-12-13 13:58:29,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-12-13 13:58:29,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:29,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-12-13 13:58:29,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:29,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:29,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:29,332 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 647 flow. Second operand 3 states and 210 transitions. [2022-12-13 13:58:29,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 1070 flow [2022-12-13 13:58:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:29,383 INFO L231 Difference]: Finished difference. Result has 45 places, 68 transitions, 601 flow [2022-12-13 13:58:29,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=601, PETRI_PLACES=45, PETRI_TRANSITIONS=68} [2022-12-13 13:58:29,383 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2022-12-13 13:58:29,383 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 68 transitions, 601 flow [2022-12-13 13:58:29,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:29,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:29,384 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:29,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 13:58:29,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2106288065, now seen corresponding path program 1 times [2022-12-13 13:58:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276287688] [2022-12-13 13:58:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:29,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 13:58:29,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276287688] [2022-12-13 13:58:29,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276287688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:29,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:29,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:29,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219812054] [2022-12-13 13:58:29,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:29,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:29,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:29,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:29,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:29,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:29,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 68 transitions, 601 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:29,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:29,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:29,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:31,005 INFO L130 PetriNetUnfolder]: 13634/21204 cut-off events. [2022-12-13 13:58:31,005 INFO L131 PetriNetUnfolder]: For 53657/53657 co-relation queries the response was YES. [2022-12-13 13:58:31,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79175 conditions, 21204 events. 13634/21204 cut-off events. For 53657/53657 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163568 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 42601. Up to 14771 conditions per place. [2022-12-13 13:58:31,125 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2022-12-13 13:58:31,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 1211 flow [2022-12-13 13:58:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2022-12-13 13:58:31,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47392290249433106 [2022-12-13 13:58:31,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2022-12-13 13:58:31,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2022-12-13 13:58:31,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:31,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2022-12-13 13:58:31,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:31,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:31,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:31,128 INFO L175 Difference]: Start difference. First operand has 45 places, 68 transitions, 601 flow. Second operand 3 states and 209 transitions. [2022-12-13 13:58:31,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 1211 flow [2022-12-13 13:58:31,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 110 transitions, 1195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:58:31,156 INFO L231 Difference]: Finished difference. Result has 48 places, 101 transitions, 1211 flow [2022-12-13 13:58:31,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1211, PETRI_PLACES=48, PETRI_TRANSITIONS=101} [2022-12-13 13:58:31,157 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2022-12-13 13:58:31,157 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 101 transitions, 1211 flow [2022-12-13 13:58:31,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:31,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:31,157 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:31,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 13:58:31,157 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash 870423322, now seen corresponding path program 1 times [2022-12-13 13:58:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:31,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199469691] [2022-12-13 13:58:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:31,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 13:58:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199469691] [2022-12-13 13:58:31,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199469691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:31,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:31,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:31,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882711085] [2022-12-13 13:58:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:31,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:31,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:31,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:31,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2022-12-13 13:58:31,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 101 transitions, 1211 flow. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:31,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:31,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2022-12-13 13:58:31,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:32,526 INFO L130 PetriNetUnfolder]: 11331/18039 cut-off events. [2022-12-13 13:58:32,526 INFO L131 PetriNetUnfolder]: For 68413/68413 co-relation queries the response was YES. [2022-12-13 13:58:32,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77880 conditions, 18039 events. 11331/18039 cut-off events. For 68413/68413 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 140784 event pairs, 3585 based on Foata normal form. 862/18861 useless extension candidates. Maximal degree in co-relation 42009. Up to 10940 conditions per place. [2022-12-13 13:58:32,628 INFO L137 encePairwiseOnDemand]: 145/147 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2022-12-13 13:58:32,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 137 transitions, 1873 flow [2022-12-13 13:58:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2022-12-13 13:58:32,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2022-12-13 13:58:32,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2022-12-13 13:58:32,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2022-12-13 13:58:32,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:32,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2022-12-13 13:58:32,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:32,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:32,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:32,630 INFO L175 Difference]: Start difference. First operand has 48 places, 101 transitions, 1211 flow. Second operand 3 states and 207 transitions. [2022-12-13 13:58:32,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 137 transitions, 1873 flow [2022-12-13 13:58:32,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 137 transitions, 1775 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:32,757 INFO L231 Difference]: Finished difference. Result has 47 places, 100 transitions, 1141 flow [2022-12-13 13:58:32,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1141, PETRI_PLACES=47, PETRI_TRANSITIONS=100} [2022-12-13 13:58:32,758 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2022-12-13 13:58:32,758 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 100 transitions, 1141 flow [2022-12-13 13:58:32,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:32,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:32,758 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:32,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 13:58:32,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:58:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1209772612, now seen corresponding path program 1 times [2022-12-13 13:58:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:32,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872733706] [2022-12-13 13:58:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:32,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:58:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:58:32,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:58:32,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 13:58:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 13:58:32,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 13:58:32,771 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:32,772 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:58:32,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-12-13 13:58:32,785 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:58:32,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 97 transitions, 254 flow [2022-12-13 13:58:32,796 INFO L130 PetriNetUnfolder]: 7/173 cut-off events. [2022-12-13 13:58:32,796 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 13:58:32,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 7/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 327 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 168. Up to 14 conditions per place. [2022-12-13 13:58:32,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 97 transitions, 254 flow [2022-12-13 13:58:32,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 97 transitions, 254 flow [2022-12-13 13:58:32,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:58:32,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 97 transitions, 254 flow [2022-12-13 13:58:32,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 97 transitions, 254 flow [2022-12-13 13:58:32,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 97 transitions, 254 flow [2022-12-13 13:58:32,807 INFO L130 PetriNetUnfolder]: 7/173 cut-off events. [2022-12-13 13:58:32,807 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 13:58:32,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 7/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 327 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 168. Up to 14 conditions per place. [2022-12-13 13:58:32,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 4980 [2022-12-13 13:58:33,824 INFO L134 LiptonReduction]: Checked pairs total: 7925 [2022-12-13 13:58:33,824 INFO L136 LiptonReduction]: Total number of compositions: 68 [2022-12-13 13:58:33,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:58:33,826 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:58:33,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 13:58:33,827 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2022-12-13 13:58:33,827 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:58:33,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:33,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:58:33,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:58:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 842998926, now seen corresponding path program 1 times [2022-12-13 13:58:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051439316] [2022-12-13 13:58:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:33,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051439316] [2022-12-13 13:58:33,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051439316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:33,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:33,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:33,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278113747] [2022-12-13 13:58:33,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:33,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:33,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:33,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:58:33,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:33,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:33,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:58:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:37,896 INFO L130 PetriNetUnfolder]: 62014/82081 cut-off events. [2022-12-13 13:58:37,896 INFO L131 PetriNetUnfolder]: For 52408/52408 co-relation queries the response was YES. [2022-12-13 13:58:37,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 82081 events. 62014/82081 cut-off events. For 52408/52408 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 524030 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 38661. Up to 54027 conditions per place. [2022-12-13 13:58:38,247 INFO L137 encePairwiseOnDemand]: 156/165 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-12-13 13:58:38,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 303 flow [2022-12-13 13:58:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2022-12-13 13:58:38,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2022-12-13 13:58:38,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2022-12-13 13:58:38,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2022-12-13 13:58:38,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:38,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2022-12-13 13:58:38,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:38,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:38,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:38,251 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 120 flow. Second operand 3 states and 252 transitions. [2022-12-13 13:58:38,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 303 flow [2022-12-13 13:58:38,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 253 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-13 13:58:38,272 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 142 flow [2022-12-13 13:58:38,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2022-12-13 13:58:38,272 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2022-12-13 13:58:38,272 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 142 flow [2022-12-13 13:58:38,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:38,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:38,273 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:38,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 13:58:38,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:58:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash 507679409, now seen corresponding path program 1 times [2022-12-13 13:58:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837096053] [2022-12-13 13:58:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:38,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837096053] [2022-12-13 13:58:38,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837096053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:38,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:38,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:58:38,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022837866] [2022-12-13 13:58:38,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:38,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:58:38,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:58:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:58:38,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:58:38,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:38,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:38,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:58:38,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:45,383 INFO L130 PetriNetUnfolder]: 87642/116859 cut-off events. [2022-12-13 13:58:45,383 INFO L131 PetriNetUnfolder]: For 63799/63799 co-relation queries the response was YES. [2022-12-13 13:58:45,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296134 conditions, 116859 events. 87642/116859 cut-off events. For 63799/63799 co-relation queries the response was YES. Maximal size of possible extension queue 6353. Compared 797127 event pairs, 43070 based on Foata normal form. 0/90717 useless extension candidates. Maximal degree in co-relation 140390. Up to 77979 conditions per place. [2022-12-13 13:58:46,107 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2022-12-13 13:58:46,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 366 flow [2022-12-13 13:58:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2022-12-13 13:58:46,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2022-12-13 13:58:46,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2022-12-13 13:58:46,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2022-12-13 13:58:46,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:46,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2022-12-13 13:58:46,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:46,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:46,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:46,111 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 142 flow. Second operand 3 states and 249 transitions. [2022-12-13 13:58:46,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 366 flow [2022-12-13 13:58:47,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:47,618 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 236 flow [2022-12-13 13:58:47,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-12-13 13:58:47,619 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2022-12-13 13:58:47,619 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 236 flow [2022-12-13 13:58:47,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:47,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:47,619 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:47,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 13:58:47,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:58:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:47,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1439906407, now seen corresponding path program 1 times [2022-12-13 13:58:47,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:47,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253239016] [2022-12-13 13:58:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:47,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:58:47,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:47,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253239016] [2022-12-13 13:58:47,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253239016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:47,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:47,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:47,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097052246] [2022-12-13 13:58:47,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:47,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:47,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:58:47,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:47,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:47,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:58:47,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:53,350 INFO L130 PetriNetUnfolder]: 71236/92293 cut-off events. [2022-12-13 13:58:53,350 INFO L131 PetriNetUnfolder]: For 80427/80427 co-relation queries the response was YES. [2022-12-13 13:58:53,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272367 conditions, 92293 events. 71236/92293 cut-off events. For 80427/80427 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 592064 event pairs, 13780 based on Foata normal form. 0/74045 useless extension candidates. Maximal degree in co-relation 272311. Up to 74462 conditions per place. [2022-12-13 13:58:53,835 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-12-13 13:58:53,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 497 flow [2022-12-13 13:58:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:58:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:58:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2022-12-13 13:58:53,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.501010101010101 [2022-12-13 13:58:53,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2022-12-13 13:58:53,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2022-12-13 13:58:53,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:53,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2022-12-13 13:58:53,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:53,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:53,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:53,838 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 236 flow. Second operand 3 states and 248 transitions. [2022-12-13 13:58:53,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 497 flow [2022-12-13 13:58:55,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:58:55,153 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 212 flow [2022-12-13 13:58:55,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-12-13 13:58:55,154 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2022-12-13 13:58:55,154 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 212 flow [2022-12-13 13:58:55,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:55,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:55,154 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:55,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 13:58:55,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:58:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1441804497, now seen corresponding path program 1 times [2022-12-13 13:58:55,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:55,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633011064] [2022-12-13 13:58:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:55,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:58:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633011064] [2022-12-13 13:58:55,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633011064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:55,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:55,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:58:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68534441] [2022-12-13 13:58:55,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:58:55,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:58:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:58:55,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:58:55,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:55,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:55,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:58:55,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:59,661 INFO L130 PetriNetUnfolder]: 57777/75233 cut-off events. [2022-12-13 13:58:59,661 INFO L131 PetriNetUnfolder]: For 53296/53296 co-relation queries the response was YES. [2022-12-13 13:58:59,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214572 conditions, 75233 events. 57777/75233 cut-off events. For 53296/53296 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 473564 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 113375. Up to 60562 conditions per place. [2022-12-13 13:59:00,008 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-12-13 13:59:00,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 446 flow [2022-12-13 13:59:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2022-12-13 13:59:00,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2022-12-13 13:59:00,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2022-12-13 13:59:00,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2022-12-13 13:59:00,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:00,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2022-12-13 13:59:00,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:00,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:00,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:00,010 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 212 flow. Second operand 3 states and 245 transitions. [2022-12-13 13:59:00,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 446 flow [2022-12-13 13:59:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:59:00,021 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2022-12-13 13:59:00,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2022-12-13 13:59:00,022 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2022-12-13 13:59:00,022 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2022-12-13 13:59:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:00,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:00,022 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-13 13:59:00,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1443910476, now seen corresponding path program 1 times [2022-12-13 13:59:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:00,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693753106] [2022-12-13 13:59:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:59:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693753106] [2022-12-13 13:59:00,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693753106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:00,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:00,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:59:00,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910226527] [2022-12-13 13:59:00,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:00,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:59:00,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:59:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:59:00,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:00,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:00,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:00,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:00,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:06,655 INFO L130 PetriNetUnfolder]: 78368/106611 cut-off events. [2022-12-13 13:59:06,656 INFO L131 PetriNetUnfolder]: For 99801/99801 co-relation queries the response was YES. [2022-12-13 13:59:06,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301471 conditions, 106611 events. 78368/106611 cut-off events. For 99801/99801 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 756837 event pairs, 34508 based on Foata normal form. 0/87014 useless extension candidates. Maximal degree in co-relation 167263. Up to 72725 conditions per place. [2022-12-13 13:59:07,318 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2022-12-13 13:59:07,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 507 flow [2022-12-13 13:59:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2022-12-13 13:59:07,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49292929292929294 [2022-12-13 13:59:07,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2022-12-13 13:59:07,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2022-12-13 13:59:07,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:07,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2022-12-13 13:59:07,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:07,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:07,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:07,321 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 3 states and 244 transitions. [2022-12-13 13:59:07,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 507 flow [2022-12-13 13:59:07,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:59:07,339 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 430 flow [2022-12-13 13:59:07,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2022-12-13 13:59:07,339 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2022-12-13 13:59:07,339 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 430 flow [2022-12-13 13:59:07,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:07,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:07,340 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:07,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-13 13:59:07,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1811555104, now seen corresponding path program 1 times [2022-12-13 13:59:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:07,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574877353] [2022-12-13 13:59:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 13:59:07,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:07,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574877353] [2022-12-13 13:59:07,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574877353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:07,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:07,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:59:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966994563] [2022-12-13 13:59:07,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:07,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:59:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:59:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:59:07,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:07,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:07,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:07,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:12,619 INFO L130 PetriNetUnfolder]: 63123/83371 cut-off events. [2022-12-13 13:59:12,620 INFO L131 PetriNetUnfolder]: For 140677/140677 co-relation queries the response was YES. [2022-12-13 13:59:12,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290089 conditions, 83371 events. 63123/83371 cut-off events. For 140677/140677 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 553630 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 157443. Up to 66634 conditions per place. [2022-12-13 13:59:13,079 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2022-12-13 13:59:13,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 781 flow [2022-12-13 13:59:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2022-12-13 13:59:13,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2022-12-13 13:59:13,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2022-12-13 13:59:13,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2022-12-13 13:59:13,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:13,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2022-12-13 13:59:13,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:13,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:13,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:13,082 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 430 flow. Second operand 3 states and 242 transitions. [2022-12-13 13:59:13,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 781 flow [2022-12-13 13:59:13,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:59:13,382 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 392 flow [2022-12-13 13:59:13,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2022-12-13 13:59:13,382 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2022-12-13 13:59:13,382 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 392 flow [2022-12-13 13:59:13,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:13,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:13,383 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-13 13:59:13,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:13,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2132369717, now seen corresponding path program 1 times [2022-12-13 13:59:13,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:13,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100752290] [2022-12-13 13:59:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:13,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 13:59:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100752290] [2022-12-13 13:59:13,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100752290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:13,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:13,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:59:13,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183636892] [2022-12-13 13:59:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:59:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:59:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:59:13,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:13,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:13,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:13,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:13,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:21,019 INFO L130 PetriNetUnfolder]: 82894/114621 cut-off events. [2022-12-13 13:59:21,019 INFO L131 PetriNetUnfolder]: For 202351/202351 co-relation queries the response was YES. [2022-12-13 13:59:21,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372683 conditions, 114621 events. 82894/114621 cut-off events. For 202351/202351 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 854887 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 216934. Up to 78927 conditions per place. [2022-12-13 13:59:21,654 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2022-12-13 13:59:21,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 101 transitions, 878 flow [2022-12-13 13:59:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2022-12-13 13:59:21,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4868686868686869 [2022-12-13 13:59:21,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2022-12-13 13:59:21,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2022-12-13 13:59:21,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:21,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2022-12-13 13:59:21,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:21,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:21,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:21,658 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 392 flow. Second operand 3 states and 241 transitions. [2022-12-13 13:59:21,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 101 transitions, 878 flow [2022-12-13 13:59:21,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:59:21,724 INFO L231 Difference]: Finished difference. Result has 52 places, 88 transitions, 834 flow [2022-12-13 13:59:21,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=834, PETRI_PLACES=52, PETRI_TRANSITIONS=88} [2022-12-13 13:59:21,724 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2022-12-13 13:59:21,725 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 88 transitions, 834 flow [2022-12-13 13:59:21,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:21,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:21,725 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:21,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-13 13:59:21,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1678948148, now seen corresponding path program 1 times [2022-12-13 13:59:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:21,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829148611] [2022-12-13 13:59:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 13:59:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829148611] [2022-12-13 13:59:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829148611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:21,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:21,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:59:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839040653] [2022-12-13 13:59:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:21,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:59:21,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:59:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:59:21,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:21,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 88 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:21,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:21,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:21,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:28,118 INFO L130 PetriNetUnfolder]: 66491/89377 cut-off events. [2022-12-13 13:59:28,118 INFO L131 PetriNetUnfolder]: For 243725/243725 co-relation queries the response was YES. [2022-12-13 13:59:28,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353392 conditions, 89377 events. 66491/89377 cut-off events. For 243725/243725 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 625111 event pairs, 13367 based on Foata normal form. 4542/84597 useless extension candidates. Maximal degree in co-relation 208656. Up to 70760 conditions per place. [2022-12-13 13:59:28,642 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2022-12-13 13:59:28,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 128 transitions, 1420 flow [2022-12-13 13:59:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-12-13 13:59:28,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48282828282828283 [2022-12-13 13:59:28,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-12-13 13:59:28,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-12-13 13:59:28,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:28,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-12-13 13:59:28,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:28,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:28,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:28,645 INFO L175 Difference]: Start difference. First operand has 52 places, 88 transitions, 834 flow. Second operand 3 states and 239 transitions. [2022-12-13 13:59:28,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 128 transitions, 1420 flow [2022-12-13 13:59:29,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 1346 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:59:29,168 INFO L231 Difference]: Finished difference. Result has 51 places, 87 transitions, 772 flow [2022-12-13 13:59:29,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=51, PETRI_TRANSITIONS=87} [2022-12-13 13:59:29,168 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2022-12-13 13:59:29,168 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 87 transitions, 772 flow [2022-12-13 13:59:29,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:29,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:29,168 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:29,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-13 13:59:29,169 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2061767041, now seen corresponding path program 1 times [2022-12-13 13:59:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:29,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329650773] [2022-12-13 13:59:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 13:59:29,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329650773] [2022-12-13 13:59:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329650773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:29,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:29,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:59:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461856221] [2022-12-13 13:59:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:59:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:59:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:59:29,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:29,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 87 transitions, 772 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:29,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:29,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:29,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:37,576 INFO L130 PetriNetUnfolder]: 83744/117939 cut-off events. [2022-12-13 13:59:37,576 INFO L131 PetriNetUnfolder]: For 338138/338138 co-relation queries the response was YES. [2022-12-13 13:59:37,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437267 conditions, 117939 events. 83744/117939 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 917142 event pairs, 30074 based on Foata normal form. 0/107390 useless extension candidates. Maximal degree in co-relation 245905. Up to 82253 conditions per place. [2022-12-13 13:59:38,346 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2022-12-13 13:59:38,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 148 transitions, 1629 flow [2022-12-13 13:59:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-12-13 13:59:38,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808080808080808 [2022-12-13 13:59:38,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-12-13 13:59:38,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-12-13 13:59:38,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:38,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-12-13 13:59:38,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:38,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:38,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:38,349 INFO L175 Difference]: Start difference. First operand has 51 places, 87 transitions, 772 flow. Second operand 3 states and 238 transitions. [2022-12-13 13:59:38,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 148 transitions, 1629 flow [2022-12-13 13:59:38,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 148 transitions, 1613 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:59:38,515 INFO L231 Difference]: Finished difference. Result has 54 places, 136 transitions, 1638 flow [2022-12-13 13:59:38,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1638, PETRI_PLACES=54, PETRI_TRANSITIONS=136} [2022-12-13 13:59:38,516 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2022-12-13 13:59:38,516 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 136 transitions, 1638 flow [2022-12-13 13:59:38,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:38,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:38,516 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:38,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-13 13:59:38,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash 509734891, now seen corresponding path program 1 times [2022-12-13 13:59:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920817051] [2022-12-13 13:59:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 13:59:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920817051] [2022-12-13 13:59:38,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920817051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:38,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:38,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:59:38,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773453651] [2022-12-13 13:59:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:38,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:59:38,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:59:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:59:38,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:38,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 136 transitions, 1638 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:38,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:38,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:38,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:46,178 INFO L130 PetriNetUnfolder]: 67349/92869 cut-off events. [2022-12-13 13:59:46,178 INFO L131 PetriNetUnfolder]: For 378525/378525 co-relation queries the response was YES. [2022-12-13 13:59:46,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412575 conditions, 92869 events. 67349/92869 cut-off events. For 378525/378525 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 686367 event pairs, 15691 based on Foata normal form. 4796/92936 useless extension candidates. Maximal degree in co-relation 225959. Up to 70802 conditions per place. [2022-12-13 13:59:46,785 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 175 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2022-12-13 13:59:46,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 194 transitions, 2657 flow [2022-12-13 13:59:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2022-12-13 13:59:46,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4767676767676768 [2022-12-13 13:59:46,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2022-12-13 13:59:46,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2022-12-13 13:59:46,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:46,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2022-12-13 13:59:46,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:46,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:46,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:46,789 INFO L175 Difference]: Start difference. First operand has 54 places, 136 transitions, 1638 flow. Second operand 3 states and 236 transitions. [2022-12-13 13:59:46,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 194 transitions, 2657 flow [2022-12-13 13:59:47,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 2527 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:59:47,793 INFO L231 Difference]: Finished difference. Result has 53 places, 135 transitions, 1536 flow [2022-12-13 13:59:47,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=53, PETRI_TRANSITIONS=135} [2022-12-13 13:59:47,793 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2022-12-13 13:59:47,793 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 135 transitions, 1536 flow [2022-12-13 13:59:47,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:47,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:47,793 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:47,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-13 13:59:47,794 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1040254932, now seen corresponding path program 1 times [2022-12-13 13:59:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554706420] [2022-12-13 13:59:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:47,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-13 13:59:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:47,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554706420] [2022-12-13 13:59:47,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554706420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:47,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:47,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:59:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121775518] [2022-12-13 13:59:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:59:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:59:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:59:47,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:47,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 135 transitions, 1536 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:47,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:47,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:57,509 INFO L130 PetriNetUnfolder]: 78886/114494 cut-off events. [2022-12-13 13:59:57,509 INFO L131 PetriNetUnfolder]: For 460187/460187 co-relation queries the response was YES. [2022-12-13 13:59:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478503 conditions, 114494 events. 78886/114494 cut-off events. For 460187/460187 co-relation queries the response was YES. Maximal size of possible extension queue 8549. Compared 937809 event pairs, 27980 based on Foata normal form. 0/110251 useless extension candidates. Maximal degree in co-relation 272772. Up to 83371 conditions per place. [2022-12-13 13:59:58,217 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 111 selfloop transitions, 113 changer transitions 0/227 dead transitions. [2022-12-13 13:59:58,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 227 transitions, 3084 flow [2022-12-13 13:59:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:59:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:59:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2022-12-13 13:59:58,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2022-12-13 13:59:58,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2022-12-13 13:59:58,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2022-12-13 13:59:58,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:58,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2022-12-13 13:59:58,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:58,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:58,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:58,222 INFO L175 Difference]: Start difference. First operand has 53 places, 135 transitions, 1536 flow. Second operand 3 states and 235 transitions. [2022-12-13 13:59:58,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 227 transitions, 3084 flow [2022-12-13 13:59:58,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 227 transitions, 3052 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:59:58,787 INFO L231 Difference]: Finished difference. Result has 56 places, 216 transitions, 3178 flow [2022-12-13 13:59:58,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3178, PETRI_PLACES=56, PETRI_TRANSITIONS=216} [2022-12-13 13:59:58,788 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2022-12-13 13:59:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 216 transitions, 3178 flow [2022-12-13 13:59:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:58,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:58,788 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:58,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-13 13:59:58,789 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 13:59:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2111840015, now seen corresponding path program 1 times [2022-12-13 13:59:58,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:58,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864735350] [2022-12-13 13:59:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:58,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-13 13:59:58,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:58,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864735350] [2022-12-13 13:59:58,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864735350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:58,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:58,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:59:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090998452] [2022-12-13 13:59:58,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:58,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:59:58,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:59:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:59:58,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2022-12-13 13:59:58,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 216 transitions, 3178 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:58,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:58,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2022-12-13 13:59:58,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:07,312 INFO L130 PetriNetUnfolder]: 65645/97131 cut-off events. [2022-12-13 14:00:07,313 INFO L131 PetriNetUnfolder]: For 544589/544589 co-relation queries the response was YES. [2022-12-13 14:00:07,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463006 conditions, 97131 events. 65645/97131 cut-off events. For 544589/544589 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 810649 event pairs, 20879 based on Foata normal form. 4122/101131 useless extension candidates. Maximal degree in co-relation 264226. Up to 58024 conditions per place. [2022-12-13 14:00:07,913 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 266 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2022-12-13 14:00:07,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 301 transitions, 4937 flow [2022-12-13 14:00:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-12-13 14:00:07,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4707070707070707 [2022-12-13 14:00:07,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-12-13 14:00:07,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-12-13 14:00:07,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:07,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-12-13 14:00:07,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:07,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:07,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:07,917 INFO L175 Difference]: Start difference. First operand has 56 places, 216 transitions, 3178 flow. Second operand 3 states and 233 transitions. [2022-12-13 14:00:07,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 301 transitions, 4937 flow [2022-12-13 14:00:08,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 301 transitions, 4711 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:08,578 INFO L231 Difference]: Finished difference. Result has 55 places, 215 transitions, 3012 flow [2022-12-13 14:00:08,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3012, PETRI_PLACES=55, PETRI_TRANSITIONS=215} [2022-12-13 14:00:08,579 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2022-12-13 14:00:08,579 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 215 transitions, 3012 flow [2022-12-13 14:00:08,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:08,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:08,579 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:08,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-13 14:00:08,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 14:00:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1038436550, now seen corresponding path program 1 times [2022-12-13 14:00:08,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:00:08,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800251944] [2022-12-13 14:00:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:00:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:00:08,586 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:00:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:00:08,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:00:08,594 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-12-13 14:00:08,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-12-13 14:00:08,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-12-13 14:00:08,594 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:08,595 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:00:08,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-12-13 14:00:08,612 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 14:00:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 108 transitions, 293 flow [2022-12-13 14:00:08,633 INFO L130 PetriNetUnfolder]: 8/197 cut-off events. [2022-12-13 14:00:08,633 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 14:00:08,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 197 events. 8/197 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 398 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 199. Up to 16 conditions per place. [2022-12-13 14:00:08,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 108 transitions, 293 flow [2022-12-13 14:00:08,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 108 transitions, 293 flow [2022-12-13 14:00:08,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:00:08,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 108 transitions, 293 flow [2022-12-13 14:00:08,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 108 transitions, 293 flow [2022-12-13 14:00:08,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 108 transitions, 293 flow [2022-12-13 14:00:08,653 INFO L130 PetriNetUnfolder]: 8/197 cut-off events. [2022-12-13 14:00:08,653 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 14:00:08,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 197 events. 8/197 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 398 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 199. Up to 16 conditions per place. [2022-12-13 14:00:08,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 6580 [2022-12-13 14:00:09,792 INFO L134 LiptonReduction]: Checked pairs total: 11577 [2022-12-13 14:00:09,792 INFO L136 LiptonReduction]: Total number of compositions: 75 [2022-12-13 14:00:09,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:00:09,793 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;@3667b865, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:00:09,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-13 14:00:09,794 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2022-12-13 14:00:09,794 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:00:09,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:09,794 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:00:09,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:00:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1028066931, now seen corresponding path program 1 times [2022-12-13 14:00:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:00:09,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406956310] [2022-12-13 14:00:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:00:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:00:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:00:09,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406956310] [2022-12-13 14:00:09,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406956310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:09,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:00:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487724509] [2022-12-13 14:00:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:09,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:09,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:00:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:09,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:00:09,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:09,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:09,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:00:09,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:30,403 INFO L130 PetriNetUnfolder]: 297494/377965 cut-off events. [2022-12-13 14:00:30,403 INFO L131 PetriNetUnfolder]: For 287847/287847 co-relation queries the response was YES. [2022-12-13 14:00:31,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832316 conditions, 377965 events. 297494/377965 cut-off events. For 287847/287847 co-relation queries the response was YES. Maximal size of possible extension queue 16101. Compared 2463783 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 183188. Up to 254687 conditions per place. [2022-12-13 14:00:32,324 INFO L137 encePairwiseOnDemand]: 173/183 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2022-12-13 14:00:32,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 367 flow [2022-12-13 14:00:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2022-12-13 14:00:32,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.51183970856102 [2022-12-13 14:00:32,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2022-12-13 14:00:32,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2022-12-13 14:00:32,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:32,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2022-12-13 14:00:32,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:32,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:32,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:32,328 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 145 flow. Second operand 3 states and 281 transitions. [2022-12-13 14:00:32,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 367 flow [2022-12-13 14:00:32,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 295 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-12-13 14:00:32,659 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 163 flow [2022-12-13 14:00:32,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2022-12-13 14:00:32,659 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-12-13 14:00:32,659 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 163 flow [2022-12-13 14:00:32,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:32,659 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:32,659 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:32,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-12-13 14:00:32,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:00:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 145134625, now seen corresponding path program 1 times [2022-12-13 14:00:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:00:32,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135600772] [2022-12-13 14:00:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:32,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:00:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:00:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:00:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135600772] [2022-12-13 14:00:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135600772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:32,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:32,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:00:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347859614] [2022-12-13 14:00:32,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:32,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:00:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:32,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:00:32,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:32,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:32,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:00:32,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:05,629 INFO L130 PetriNetUnfolder]: 423576/541309 cut-off events. [2022-12-13 14:01:05,629 INFO L131 PetriNetUnfolder]: For 286495/286495 co-relation queries the response was YES. [2022-12-13 14:01:07,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365244 conditions, 541309 events. 423576/541309 cut-off events. For 286495/286495 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3722252 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 647466. Up to 370121 conditions per place. [2022-12-13 14:01:09,308 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2022-12-13 14:01:09,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 428 flow [2022-12-13 14:01:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:01:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:01:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2022-12-13 14:01:09,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5063752276867031 [2022-12-13 14:01:09,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2022-12-13 14:01:09,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2022-12-13 14:01:09,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:09,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2022-12-13 14:01:09,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:09,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:09,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:09,312 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 163 flow. Second operand 3 states and 278 transitions. [2022-12-13 14:01:09,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 428 flow [2022-12-13 14:01:48,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:01:48,508 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 275 flow [2022-12-13 14:01:48,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2022-12-13 14:01:48,508 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2022-12-13 14:01:48,508 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 275 flow [2022-12-13 14:01:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:48,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:48,509 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:48,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-12-13 14:01:48,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:01:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 206439114, now seen corresponding path program 1 times [2022-12-13 14:01:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270522673] [2022-12-13 14:01:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:01:48,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270522673] [2022-12-13 14:01:48,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270522673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:48,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:48,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:01:48,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138391262] [2022-12-13 14:01:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:48,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:48,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:01:48,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:48,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:48,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:01:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:02:15,802 INFO L130 PetriNetUnfolder]: 345272/429917 cut-off events. [2022-12-13 14:02:15,802 INFO L131 PetriNetUnfolder]: For 362722/362722 co-relation queries the response was YES. [2022-12-13 14:02:16,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258871 conditions, 429917 events. 345272/429917 cut-off events. For 362722/362722 co-relation queries the response was YES. Maximal size of possible extension queue 19479. Compared 2762676 event pairs, 66448 based on Foata normal form. 0/334134 useless extension candidates. Maximal degree in co-relation 1258814. Up to 345956 conditions per place. [2022-12-13 14:02:18,605 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-12-13 14:02:18,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 585 flow [2022-12-13 14:02:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:02:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:02:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2022-12-13 14:02:18,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5045537340619308 [2022-12-13 14:02:18,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2022-12-13 14:02:18,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2022-12-13 14:02:18,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:02:18,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2022-12-13 14:02:18,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:18,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:18,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:18,609 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 275 flow. Second operand 3 states and 277 transitions. [2022-12-13 14:02:18,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 585 flow [2022-12-13 14:02:51,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:02:51,280 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 247 flow [2022-12-13 14:02:51,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2022-12-13 14:02:51,280 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2022-12-13 14:02:51,280 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 247 flow [2022-12-13 14:02:51,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:51,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:02:51,280 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:02:51,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-12-13 14:02:51,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:02:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:02:51,281 INFO L85 PathProgramCache]: Analyzing trace with hash 204209914, now seen corresponding path program 1 times [2022-12-13 14:02:51,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:02:51,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222093442] [2022-12-13 14:02:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:02:51,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:02:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:02:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:02:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:02:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222093442] [2022-12-13 14:02:51,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222093442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:02:51,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:02:51,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:02:51,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936629951] [2022-12-13 14:02:51,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:02:51,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:02:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:02:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:02:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:02:51,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:02:51,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:51,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:02:51,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:02:51,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:03:12,461 INFO L130 PetriNetUnfolder]: 280909/351017 cut-off events. [2022-12-13 14:03:12,461 INFO L131 PetriNetUnfolder]: For 239234/239234 co-relation queries the response was YES. [2022-12-13 14:03:13,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992745 conditions, 351017 events. 280909/351017 cut-off events. For 239234/239234 co-relation queries the response was YES. Maximal size of possible extension queue 16167. Compared 2218046 event pairs, 48119 based on Foata normal form. 0/274201 useless extension candidates. Maximal degree in co-relation 532135. Up to 281912 conditions per place. [2022-12-13 14:03:14,705 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-12-13 14:03:14,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 528 flow [2022-12-13 14:03:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:03:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:03:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2022-12-13 14:03:14,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4990892531876138 [2022-12-13 14:03:14,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2022-12-13 14:03:14,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2022-12-13 14:03:14,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:03:14,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2022-12-13 14:03:14,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:14,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:14,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:14,709 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 247 flow. Second operand 3 states and 274 transitions. [2022-12-13 14:03:14,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 528 flow [2022-12-13 14:03:14,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:03:14,758 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 245 flow [2022-12-13 14:03:14,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2022-12-13 14:03:14,759 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2022-12-13 14:03:14,759 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 245 flow [2022-12-13 14:03:14,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:14,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:03:14,759 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 14:03:14,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-12-13 14:03:14,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:03:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:03:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2027102787, now seen corresponding path program 1 times [2022-12-13 14:03:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:03:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922533256] [2022-12-13 14:03:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:03:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:03:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:03:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:03:14,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:03:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922533256] [2022-12-13 14:03:14,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922533256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:03:14,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:03:14,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:03:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732992031] [2022-12-13 14:03:14,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:03:14,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:03:14,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:03:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:03:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:03:14,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:03:14,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:14,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:03:14,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:03:14,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:03:46,335 INFO L130 PetriNetUnfolder]: 385656/500287 cut-off events. [2022-12-13 14:03:46,335 INFO L131 PetriNetUnfolder]: For 463772/463772 co-relation queries the response was YES. [2022-12-13 14:03:47,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404945 conditions, 500287 events. 385656/500287 cut-off events. For 463772/463772 co-relation queries the response was YES. Maximal size of possible extension queue 23419. Compared 3586529 event pairs, 176836 based on Foata normal form. 0/398586 useless extension candidates. Maximal degree in co-relation 759541. Up to 349769 conditions per place. [2022-12-13 14:03:49,738 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 60 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2022-12-13 14:03:49,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 605 flow [2022-12-13 14:03:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:03:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:03:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2022-12-13 14:03:49,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4972677595628415 [2022-12-13 14:03:49,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2022-12-13 14:03:49,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2022-12-13 14:03:49,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:03:49,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2022-12-13 14:03:49,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:49,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:49,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:49,741 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 245 flow. Second operand 3 states and 273 transitions. [2022-12-13 14:03:49,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 605 flow [2022-12-13 14:03:51,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 601 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:03:51,011 INFO L231 Difference]: Finished difference. Result has 56 places, 71 transitions, 513 flow [2022-12-13 14:03:51,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=56, PETRI_TRANSITIONS=71} [2022-12-13 14:03:51,011 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2022-12-13 14:03:51,011 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 71 transitions, 513 flow [2022-12-13 14:03:51,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:51,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:03:51,011 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:03:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-12-13 14:03:51,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:03:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:03:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1584318608, now seen corresponding path program 1 times [2022-12-13 14:03:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:03:51,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829588895] [2022-12-13 14:03:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:03:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:03:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:03:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:03:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:03:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829588895] [2022-12-13 14:03:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829588895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:03:51,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:03:51,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:03:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052422204] [2022-12-13 14:03:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:03:51,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:03:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:03:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:03:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:03:51,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:03:51,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 71 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:51,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:03:51,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:03:51,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:04:17,301 INFO L130 PetriNetUnfolder]: 311645/393393 cut-off events. [2022-12-13 14:04:17,301 INFO L131 PetriNetUnfolder]: For 652015/652015 co-relation queries the response was YES. [2022-12-13 14:04:18,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350528 conditions, 393393 events. 311645/393393 cut-off events. For 652015/652015 co-relation queries the response was YES. Maximal size of possible extension queue 19046. Compared 2613052 event pairs, 55633 based on Foata normal form. 16278/339366 useless extension candidates. Maximal degree in co-relation 675481. Up to 313668 conditions per place. [2022-12-13 14:04:20,202 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 100 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2022-12-13 14:04:20,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 943 flow [2022-12-13 14:04:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:04:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:04:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2022-12-13 14:04:20,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4936247723132969 [2022-12-13 14:04:20,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2022-12-13 14:04:20,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2022-12-13 14:04:20,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:04:20,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2022-12-13 14:04:20,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:20,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:20,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:20,206 INFO L175 Difference]: Start difference. First operand has 56 places, 71 transitions, 513 flow. Second operand 3 states and 271 transitions. [2022-12-13 14:04:20,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 943 flow [2022-12-13 14:04:27,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 107 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:04:27,854 INFO L231 Difference]: Finished difference. Result has 55 places, 70 transitions, 467 flow [2022-12-13 14:04:27,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=55, PETRI_TRANSITIONS=70} [2022-12-13 14:04:27,855 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2022-12-13 14:04:27,855 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 70 transitions, 467 flow [2022-12-13 14:04:27,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:27,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:04:27,855 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:04:27,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-12-13 14:04:27,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:04:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:04:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1099338126, now seen corresponding path program 1 times [2022-12-13 14:04:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:04:27,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624825654] [2022-12-13 14:04:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:04:27,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:04:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:04:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:04:27,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:04:27,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624825654] [2022-12-13 14:04:27,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624825654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:04:27,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:04:27,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:04:27,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268208019] [2022-12-13 14:04:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:04:27,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:04:27,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:04:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:04:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:04:27,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:04:27,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 70 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:27,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:04:27,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:04:27,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:05:05,252 INFO L130 PetriNetUnfolder]: 417794/548677 cut-off events. [2022-12-13 14:05:05,252 INFO L131 PetriNetUnfolder]: For 983585/983585 co-relation queries the response was YES. [2022-12-13 14:05:06,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767727 conditions, 548677 events. 417794/548677 cut-off events. For 983585/983585 co-relation queries the response was YES. Maximal size of possible extension queue 26916. Compared 4110789 event pairs, 172730 based on Foata normal form. 0/458425 useless extension candidates. Maximal degree in co-relation 983136. Up to 387351 conditions per place. [2022-12-13 14:05:09,263 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 75 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2022-12-13 14:05:09,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 123 transitions, 1072 flow [2022-12-13 14:05:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:05:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:05:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2022-12-13 14:05:09,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4918032786885246 [2022-12-13 14:05:09,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2022-12-13 14:05:09,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2022-12-13 14:05:09,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:05:09,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2022-12-13 14:05:09,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:09,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:09,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:09,266 INFO L175 Difference]: Start difference. First operand has 55 places, 70 transitions, 467 flow. Second operand 3 states and 270 transitions. [2022-12-13 14:05:09,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 123 transitions, 1072 flow [2022-12-13 14:05:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 123 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:05:09,684 INFO L231 Difference]: Finished difference. Result has 58 places, 107 transitions, 1021 flow [2022-12-13 14:05:09,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=58, PETRI_TRANSITIONS=107} [2022-12-13 14:05:09,685 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2022-12-13 14:05:09,685 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 107 transitions, 1021 flow [2022-12-13 14:05:09,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:09,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:05:09,685 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:05:09,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-12-13 14:05:09,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:05:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:05:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 280261042, now seen corresponding path program 1 times [2022-12-13 14:05:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:05:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177809550] [2022-12-13 14:05:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:05:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:05:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:05:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:05:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:05:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177809550] [2022-12-13 14:05:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177809550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:05:09,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:05:09,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:05:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903227373] [2022-12-13 14:05:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:05:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:05:09,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:05:09,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:05:09,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:05:09,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:05:09,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 107 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:09,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:05:09,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:05:09,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:05:41,031 INFO L130 PetriNetUnfolder]: 335923/429061 cut-off events. [2022-12-13 14:05:41,031 INFO L131 PetriNetUnfolder]: For 1173031/1173031 co-relation queries the response was YES. [2022-12-13 14:05:42,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670367 conditions, 429061 events. 335923/429061 cut-off events. For 1173031/1173031 co-relation queries the response was YES. Maximal size of possible extension queue 21877. Compared 2991548 event pairs, 64967 based on Foata normal form. 18824/389225 useless extension candidates. Maximal degree in co-relation 947173. Up to 340086 conditions per place. [2022-12-13 14:05:44,387 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 147 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2022-12-13 14:05:44,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 158 transitions, 1758 flow [2022-12-13 14:05:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:05:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:05:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2022-12-13 14:05:44,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48816029143898 [2022-12-13 14:05:44,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2022-12-13 14:05:44,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2022-12-13 14:05:44,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:05:44,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2022-12-13 14:05:44,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:44,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:44,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:44,390 INFO L175 Difference]: Start difference. First operand has 58 places, 107 transitions, 1021 flow. Second operand 3 states and 268 transitions. [2022-12-13 14:05:44,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 158 transitions, 1758 flow [2022-12-13 14:05:52,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 158 transitions, 1668 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:05:52,884 INFO L231 Difference]: Finished difference. Result has 57 places, 106 transitions, 943 flow [2022-12-13 14:05:52,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=57, PETRI_TRANSITIONS=106} [2022-12-13 14:05:52,884 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2022-12-13 14:05:52,884 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 106 transitions, 943 flow [2022-12-13 14:05:52,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:52,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:05:52,884 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:05:52,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-12-13 14:05:52,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 14:05:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:05:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash -299995048, now seen corresponding path program 1 times [2022-12-13 14:05:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:05:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193042813] [2022-12-13 14:05:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:05:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:05:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:05:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 14:05:52,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:05:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193042813] [2022-12-13 14:05:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193042813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:05:52,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:05:52,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:05:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890711674] [2022-12-13 14:05:52,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:05:52,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:05:52,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:05:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:05:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:05:52,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 183 [2022-12-13 14:05:52,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 106 transitions, 943 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:05:52,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:05:52,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 183 [2022-12-13 14:05:52,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand