./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc --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-5e519f3 [2022-11-02 20:50:27,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:50:27,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:50:27,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:50:27,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:50:27,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:50:27,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:50:27,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:50:27,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:50:27,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:50:27,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:50:27,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:50:27,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:50:27,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:50:27,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:50:27,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:50:27,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:50:27,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:50:27,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:50:27,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:50:27,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:50:27,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:50:27,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:50:27,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:50:27,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:50:27,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:50:27,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:50:27,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:50:27,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:50:27,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:50:27,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:50:27,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:50:27,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:50:27,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:50:27,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:50:27,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:50:27,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:50:27,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:50:27,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:50:27,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:50:27,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:50:27,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:50:27,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:50:27,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:50:27,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:50:27,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:50:27,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:50:27,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:50:27,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:50:27,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:50:27,566 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:50:27,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:50:27,567 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:50:27,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:50:27,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:50:27,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:50:27,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:50:27,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:50:27,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:50:27,570 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:50:27,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:50:27,571 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:50:27,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:50:27,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:50:27,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:50:27,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:50:27,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:50:27,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:50:27,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:50:27,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:50:27,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:50:27,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:50:27,574 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:50:27,574 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:50:27,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:50:27,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 [2022-11-02 20:50:27,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:50:27,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:50:27,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:50:27,910 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:50:27,911 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:50:27,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-11-02 20:50:27,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/data/1d2346c2a/20093de0095648628d11db208fca7f07/FLAG4f32d942e [2022-11-02 20:50:28,455 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:50:28,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-11-02 20:50:28,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/data/1d2346c2a/20093de0095648628d11db208fca7f07/FLAG4f32d942e [2022-11-02 20:50:28,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/data/1d2346c2a/20093de0095648628d11db208fca7f07 [2022-11-02 20:50:28,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:50:28,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:50:28,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:50:28,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:50:28,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:50:28,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:50:28" (1/1) ... [2022-11-02 20:50:28,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791b4231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:28, skipping insertion in model container [2022-11-02 20:50:28,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:50:28" (1/1) ... [2022-11-02 20:50:28,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:50:28,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:50:29,084 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:50:29,234 WARN L230 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_db1ebafb-8848-4a7b-a1af-494ace734ee3/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-11-02 20:50:29,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:50:29,251 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:50:29,278 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:50:29,307 WARN L230 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_db1ebafb-8848-4a7b-a1af-494ace734ee3/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-11-02 20:50:29,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:50:29,355 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:50:29,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29 WrapperNode [2022-11-02 20:50:29,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:50:29,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:50:29,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:50:29,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:50:29,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,417 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-11-02 20:50:29,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:50:29,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:50:29,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:50:29,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:50:29,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:50:29,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:50:29,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:50:29,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:50:29,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (1/1) ... [2022-11-02 20:50:29,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:50:29,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:29,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:50:29,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1ebafb-8848-4a7b-a1af-494ace734ee3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:50:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-02 20:50:29,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-02 20:50:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:50:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:50:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:50:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:50:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:50:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:50:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:50:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:50:29,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:50:29,563 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:50:29,690 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:50:29,692 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:50:29,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:50:29,827 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:50:29,827 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:50:29,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:29 BoogieIcfgContainer [2022-11-02 20:50:29,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:50:29,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:50:29,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:50:29,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:50:29,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:50:28" (1/3) ... [2022-11-02 20:50:29,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56abb5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:50:29, skipping insertion in model container [2022-11-02 20:50:29,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:29" (2/3) ... [2022-11-02 20:50:29,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56abb5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:50:29, skipping insertion in model container [2022-11-02 20:50:29,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:29" (3/3) ... [2022-11-02 20:50:29,852 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2022-11-02 20:50:29,875 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:50:29,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:50:29,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:50:29,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:50:29,983 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:30,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 89 flow [2022-11-02 20:50:30,053 INFO L130 PetriNetUnfolder]: 2/53 cut-off events. [2022-11-02 20:50:30,053 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:30,056 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. [2022-11-02 20:50:30,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 42 transitions, 89 flow [2022-11-02 20:50:30,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 89 flow [2022-11-02 20:50:30,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:30,079 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;@6db9b627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:30,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:50:30,095 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-02 20:50:30,095 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:30,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:30,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:30,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash 527068737, now seen corresponding path program 1 times [2022-11-02 20:50:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:30,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152119342] [2022-11-02 20:50:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:30,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:30,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:30,444 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:30,445 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-02 20:50:30,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-02 20:50:30,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-02 20:50:30,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:50:30,450 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:50:30,463 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:30,463 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:50:30,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:30,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 53 transitions, 118 flow [2022-11-02 20:50:30,566 INFO L130 PetriNetUnfolder]: 3/77 cut-off events. [2022-11-02 20:50:30,566 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:50:30,568 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. [2022-11-02 20:50:30,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 53 transitions, 118 flow [2022-11-02 20:50:30,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 118 flow [2022-11-02 20:50:30,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:30,578 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;@6db9b627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:30,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:50:30,602 INFO L130 PetriNetUnfolder]: 2/46 cut-off events. [2022-11-02 20:50:30,602 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:50:30,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:30,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:30,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:50:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:30,604 INFO L85 PathProgramCache]: Analyzing trace with hash -297621323, now seen corresponding path program 1 times [2022-11-02 20:50:30,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:30,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716861120] [2022-11-02 20:50:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:30,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:30,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716861120] [2022-11-02 20:50:30,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716861120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:30,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:30,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:30,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596592325] [2022-11-02 20:50:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:30,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:30,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:30,839 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 53 [2022-11-02 20:50:30,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:30,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 53 [2022-11-02 20:50:30,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:30,921 INFO L130 PetriNetUnfolder]: 19/117 cut-off events. [2022-11-02 20:50:30,921 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:50:30,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 117 events. 19/117 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 348 event pairs, 10 based on Foata normal form. 35/137 useless extension candidates. Maximal degree in co-relation 119. Up to 37 conditions per place. [2022-11-02 20:50:30,924 INFO L137 encePairwiseOnDemand]: 47/53 looper letters, 14 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2022-11-02 20:50:30,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 153 flow [2022-11-02 20:50:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2022-11-02 20:50:30,939 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8742138364779874 [2022-11-02 20:50:30,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2022-11-02 20:50:30,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2022-11-02 20:50:30,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:30,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2022-11-02 20:50:30,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 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) [2022-11-02 20:50:30,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 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) [2022-11-02 20:50:30,955 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 118 flow. Second operand 3 states and 139 transitions. [2022-11-02 20:50:30,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 153 flow [2022-11-02 20:50:30,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 151 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:30,963 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 124 flow [2022-11-02 20:50:30,965 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-11-02 20:50:30,969 INFO L287 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-11-02 20:50:30,969 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 124 flow [2022-11-02 20:50:30,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:30,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:30,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:50:30,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:50:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1916139092, now seen corresponding path program 1 times [2022-11-02 20:50:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:30,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929327546] [2022-11-02 20:50:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:30,998 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:31,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:31,019 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:31,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:50:31,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:50:31,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 20:50:31,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:50:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:50:31,021 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:50:31,022 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:31,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:50:31,044 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:31,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2022-11-02 20:50:31,071 INFO L130 PetriNetUnfolder]: 4/101 cut-off events. [2022-11-02 20:50:31,071 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:50:31,073 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 164 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. [2022-11-02 20:50:31,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2022-11-02 20:50:31,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2022-11-02 20:50:31,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:31,082 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;@6db9b627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:31,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:50:31,098 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-02 20:50:31,099 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:50:31,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:31,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:31,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:50:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 833747371, now seen corresponding path program 1 times [2022-11-02 20:50:31,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:31,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024463758] [2022-11-02 20:50:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:31,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:31,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024463758] [2022-11-02 20:50:31,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024463758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:31,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:31,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566540088] [2022-11-02 20:50:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:31,221 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 64 [2022-11-02 20:50:31,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 149 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) [2022-11-02 20:50:31,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:31,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 64 [2022-11-02 20:50:31,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:31,430 INFO L130 PetriNetUnfolder]: 203/539 cut-off events. [2022-11-02 20:50:31,430 INFO L131 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2022-11-02 20:50:31,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 539 events. 203/539 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3178 event pairs, 124 based on Foata normal form. 160/601 useless extension candidates. Maximal degree in co-relation 680. Up to 259 conditions per place. [2022-11-02 20:50:31,439 INFO L137 encePairwiseOnDemand]: 57/64 looper letters, 21 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2022-11-02 20:50:31,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 215 flow [2022-11-02 20:50:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2022-11-02 20:50:31,447 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.875 [2022-11-02 20:50:31,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2022-11-02 20:50:31,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2022-11-02 20:50:31,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:31,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2022-11-02 20:50:31,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,454 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 149 flow. Second operand 3 states and 168 transitions. [2022-11-02 20:50:31,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 215 flow [2022-11-02 20:50:31,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 207 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:31,457 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 159 flow [2022-11-02 20:50:31,457 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2022-11-02 20:50:31,458 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2022-11-02 20:50:31,458 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 159 flow [2022-11-02 20:50:31,459 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) [2022-11-02 20:50:31,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:31,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:31,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:50:31,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:50:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:31,460 INFO L85 PathProgramCache]: Analyzing trace with hash 681039901, now seen corresponding path program 1 times [2022-11-02 20:50:31,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:31,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692293580] [2022-11-02 20:50:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:31,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:31,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:31,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692293580] [2022-11-02 20:50:31,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692293580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:31,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:31,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063936085] [2022-11-02 20:50:31,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:31,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:31,581 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 64 [2022-11-02 20:50:31,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:31,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 64 [2022-11-02 20:50:31,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:31,760 INFO L130 PetriNetUnfolder]: 222/629 cut-off events. [2022-11-02 20:50:31,760 INFO L131 PetriNetUnfolder]: For 339/339 co-relation queries the response was YES. [2022-11-02 20:50:31,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 629 events. 222/629 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3959 event pairs, 113 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1347. Up to 292 conditions per place. [2022-11-02 20:50:31,769 INFO L137 encePairwiseOnDemand]: 59/64 looper letters, 23 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2022-11-02 20:50:31,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 260 flow [2022-11-02 20:50:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2022-11-02 20:50:31,774 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8489583333333334 [2022-11-02 20:50:31,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2022-11-02 20:50:31,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2022-11-02 20:50:31,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:31,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2022-11-02 20:50:31,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 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) [2022-11-02 20:50:31,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,781 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 159 flow. Second operand 3 states and 163 transitions. [2022-11-02 20:50:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 260 flow [2022-11-02 20:50:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:50:31,789 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 199 flow [2022-11-02 20:50:31,790 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2022-11-02 20:50:31,791 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2022-11-02 20:50:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 199 flow [2022-11-02 20:50:31,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:31,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:50:31,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:50:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -932714154, now seen corresponding path program 1 times [2022-11-02 20:50:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:31,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122299018] [2022-11-02 20:50:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:31,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:31,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122299018] [2022-11-02 20:50:31,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122299018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:31,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:31,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:31,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665673750] [2022-11-02 20:50:31,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:31,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:31,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:31,889 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 64 [2022-11-02 20:50:31,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 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) [2022-11-02 20:50:31,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:31,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 64 [2022-11-02 20:50:31,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:32,189 INFO L130 PetriNetUnfolder]: 464/1205 cut-off events. [2022-11-02 20:50:32,190 INFO L131 PetriNetUnfolder]: For 794/794 co-relation queries the response was YES. [2022-11-02 20:50:32,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3084 conditions, 1205 events. 464/1205 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8701 event pairs, 91 based on Foata normal form. 10/1068 useless extension candidates. Maximal degree in co-relation 3004. Up to 282 conditions per place. [2022-11-02 20:50:32,204 INFO L137 encePairwiseOnDemand]: 55/64 looper letters, 50 selfloop transitions, 23 changer transitions 0/112 dead transitions. [2022-11-02 20:50:32,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 573 flow [2022-11-02 20:50:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:50:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2022-11-02 20:50:32,206 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.828125 [2022-11-02 20:50:32,206 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 371 transitions. [2022-11-02 20:50:32,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 371 transitions. [2022-11-02 20:50:32,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:32,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 371 transitions. [2022-11-02 20:50:32,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,210 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,211 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 199 flow. Second operand 7 states and 371 transitions. [2022-11-02 20:50:32,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 573 flow [2022-11-02 20:50:32,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 541 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:50:32,217 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 387 flow [2022-11-02 20:50:32,218 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2022-11-02 20:50:32,219 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2022-11-02 20:50:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 387 flow [2022-11-02 20:50:32,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 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) [2022-11-02 20:50:32,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:50:32,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:50:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1486133546, now seen corresponding path program 2 times [2022-11-02 20:50:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:32,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078170026] [2022-11-02 20:50:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:32,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:32,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078170026] [2022-11-02 20:50:32,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078170026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:32,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:32,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:32,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257611891] [2022-11-02 20:50:32,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:32,339 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 64 [2022-11-02 20:50:32,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 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) [2022-11-02 20:50:32,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:32,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 64 [2022-11-02 20:50:32,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:32,694 INFO L130 PetriNetUnfolder]: 441/1220 cut-off events. [2022-11-02 20:50:32,694 INFO L131 PetriNetUnfolder]: For 1541/1541 co-relation queries the response was YES. [2022-11-02 20:50:32,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1220 events. 441/1220 cut-off events. For 1541/1541 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9121 event pairs, 114 based on Foata normal form. 20/1129 useless extension candidates. Maximal degree in co-relation 3538. Up to 241 conditions per place. [2022-11-02 20:50:32,711 INFO L137 encePairwiseOnDemand]: 55/64 looper letters, 52 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2022-11-02 20:50:32,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 117 transitions, 734 flow [2022-11-02 20:50:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:50:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 322 transitions. [2022-11-02 20:50:32,713 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8385416666666666 [2022-11-02 20:50:32,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 322 transitions. [2022-11-02 20:50:32,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 322 transitions. [2022-11-02 20:50:32,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:32,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 322 transitions. [2022-11-02 20:50:32,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,717 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,717 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 387 flow. Second operand 6 states and 322 transitions. [2022-11-02 20:50:32,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 117 transitions, 734 flow [2022-11-02 20:50:32,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 732 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:32,726 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 574 flow [2022-11-02 20:50:32,726 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2022-11-02 20:50:32,727 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-11-02 20:50:32,727 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 574 flow [2022-11-02 20:50:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 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) [2022-11-02 20:50:32,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:32,728 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:50:32,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:50:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash -468720811, now seen corresponding path program 1 times [2022-11-02 20:50:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:32,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916204752] [2022-11-02 20:50:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:32,746 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:32,764 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:32,766 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:32,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:50:32,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:50:32,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:50:32,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:50:32,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:50:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:50:32,770 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-02 20:50:32,771 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:32,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:50:32,805 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:32,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 182 flow [2022-11-02 20:50:32,829 INFO L130 PetriNetUnfolder]: 5/125 cut-off events. [2022-11-02 20:50:32,829 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:50:32,830 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. [2022-11-02 20:50:32,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 182 flow [2022-11-02 20:50:32,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 75 transitions, 182 flow [2022-11-02 20:50:32,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:32,833 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;@6db9b627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:32,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:50:32,839 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-11-02 20:50:32,839 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:50:32,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:32,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:32,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -456275018, now seen corresponding path program 1 times [2022-11-02 20:50:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:32,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171180952] [2022-11-02 20:50:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:32,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:32,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171180952] [2022-11-02 20:50:32,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171180952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:32,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:32,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139309865] [2022-11-02 20:50:32,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:32,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:32,901 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-11-02 20:50:32,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 182 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) [2022-11-02 20:50:32,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:32,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-11-02 20:50:32,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:33,323 INFO L130 PetriNetUnfolder]: 1344/2642 cut-off events. [2022-11-02 20:50:33,323 INFO L131 PetriNetUnfolder]: For 1446/1446 co-relation queries the response was YES. [2022-11-02 20:50:33,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5424 conditions, 2642 events. 1344/2642 cut-off events. For 1446/1446 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19062 event pairs, 870 based on Foata normal form. 669/2762 useless extension candidates. Maximal degree in co-relation 3515. Up to 1494 conditions per place. [2022-11-02 20:50:33,358 INFO L137 encePairwiseOnDemand]: 67/75 looper letters, 28 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2022-11-02 20:50:33,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 281 flow [2022-11-02 20:50:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-11-02 20:50:33,360 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8755555555555555 [2022-11-02 20:50:33,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-11-02 20:50:33,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-11-02 20:50:33,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:33,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-11-02 20:50:33,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:33,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:33,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:33,367 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 182 flow. Second operand 3 states and 197 transitions. [2022-11-02 20:50:33,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 281 flow [2022-11-02 20:50:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 263 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:33,371 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 194 flow [2022-11-02 20:50:33,371 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2022-11-02 20:50:33,373 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, -2 predicate places. [2022-11-02 20:50:33,373 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 194 flow [2022-11-02 20:50:33,374 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) [2022-11-02 20:50:33,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:33,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:50:33,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1917209497, now seen corresponding path program 1 times [2022-11-02 20:50:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:33,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820281084] [2022-11-02 20:50:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:33,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:33,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820281084] [2022-11-02 20:50:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820281084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:33,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:33,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:33,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965938717] [2022-11-02 20:50:33,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:33,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:33,424 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-11-02 20:50:33,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 194 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) [2022-11-02 20:50:33,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:33,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-11-02 20:50:33,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:33,985 INFO L130 PetriNetUnfolder]: 1768/3569 cut-off events. [2022-11-02 20:50:33,986 INFO L131 PetriNetUnfolder]: For 2165/2165 co-relation queries the response was YES. [2022-11-02 20:50:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8437 conditions, 3569 events. 1768/3569 cut-off events. For 2165/2165 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27702 event pairs, 936 based on Foata normal form. 0/3024 useless extension candidates. Maximal degree in co-relation 8372. Up to 2004 conditions per place. [2022-11-02 20:50:34,088 INFO L137 encePairwiseOnDemand]: 69/75 looper letters, 31 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2022-11-02 20:50:34,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 87 transitions, 336 flow [2022-11-02 20:50:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2022-11-02 20:50:34,093 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2022-11-02 20:50:34,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2022-11-02 20:50:34,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2022-11-02 20:50:34,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:34,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2022-11-02 20:50:34,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 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) [2022-11-02 20:50:34,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:34,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:34,096 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 194 flow. Second operand 3 states and 192 transitions. [2022-11-02 20:50:34,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 87 transitions, 336 flow [2022-11-02 20:50:34,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:50:34,108 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 252 flow [2022-11-02 20:50:34,109 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2022-11-02 20:50:34,111 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 0 predicate places. [2022-11-02 20:50:34,111 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 252 flow [2022-11-02 20:50:34,112 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) [2022-11-02 20:50:34,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:34,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:34,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:50:34,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -870085120, now seen corresponding path program 1 times [2022-11-02 20:50:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:34,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251079531] [2022-11-02 20:50:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:34,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:34,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251079531] [2022-11-02 20:50:34,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251079531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:34,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:34,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:34,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833228415] [2022-11-02 20:50:34,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:34,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:34,282 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-11-02 20:50:34,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:34,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:34,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-11-02 20:50:34,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:35,526 INFO L130 PetriNetUnfolder]: 3702/7308 cut-off events. [2022-11-02 20:50:35,527 INFO L131 PetriNetUnfolder]: For 5960/7310 co-relation queries the response was YES. [2022-11-02 20:50:35,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19270 conditions, 7308 events. 3702/7308 cut-off events. For 5960/7310 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 61787 event pairs, 920 based on Foata normal form. 76/6186 useless extension candidates. Maximal degree in co-relation 19189. Up to 1986 conditions per place. [2022-11-02 20:50:35,684 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 73 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2022-11-02 20:50:35,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 148 transitions, 787 flow [2022-11-02 20:50:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:50:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 444 transitions. [2022-11-02 20:50:35,688 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8457142857142858 [2022-11-02 20:50:35,688 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 444 transitions. [2022-11-02 20:50:35,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 444 transitions. [2022-11-02 20:50:35,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:35,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 444 transitions. [2022-11-02 20:50:35,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.42857142857143) internal successors, (444), 7 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) [2022-11-02 20:50:35,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:35,692 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:35,693 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 252 flow. Second operand 7 states and 444 transitions. [2022-11-02 20:50:35,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 148 transitions, 787 flow [2022-11-02 20:50:35,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 745 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:50:35,716 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 484 flow [2022-11-02 20:50:35,717 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2022-11-02 20:50:35,719 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2022-11-02 20:50:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 484 flow [2022-11-02 20:50:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:35,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:35,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:35,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:50:35,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1671881856, now seen corresponding path program 2 times [2022-11-02 20:50:35,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:35,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136820303] [2022-11-02 20:50:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:50:35,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136820303] [2022-11-02 20:50:35,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136820303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:35,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:35,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405096603] [2022-11-02 20:50:35,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:35,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:35,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:35,885 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-11-02 20:50:35,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:35,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:35,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-11-02 20:50:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:37,293 INFO L130 PetriNetUnfolder]: 3687/7430 cut-off events. [2022-11-02 20:50:37,293 INFO L131 PetriNetUnfolder]: For 10210/10252 co-relation queries the response was YES. [2022-11-02 20:50:37,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 7430 events. 3687/7430 cut-off events. For 10210/10252 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 64625 event pairs, 894 based on Foata normal form. 90/6553 useless extension candidates. Maximal degree in co-relation 12426. Up to 1800 conditions per place. [2022-11-02 20:50:37,396 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 73 selfloop transitions, 35 changer transitions 0/154 dead transitions. [2022-11-02 20:50:37,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 993 flow [2022-11-02 20:50:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:50:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2022-11-02 20:50:37,399 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2022-11-02 20:50:37,399 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 384 transitions. [2022-11-02 20:50:37,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 384 transitions. [2022-11-02 20:50:37,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:37,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 384 transitions. [2022-11-02 20:50:37,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,402 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 484 flow. Second operand 6 states and 384 transitions. [2022-11-02 20:50:37,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 993 flow [2022-11-02 20:50:37,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 989 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:37,435 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 745 flow [2022-11-02 20:50:37,435 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=745, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2022-11-02 20:50:37,436 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 17 predicate places. [2022-11-02 20:50:37,436 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 745 flow [2022-11-02 20:50:37,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:37,437 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:37,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:50:37,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1405795873, now seen corresponding path program 1 times [2022-11-02 20:50:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:37,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634252277] [2022-11-02 20:50:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:37,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:37,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634252277] [2022-11-02 20:50:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634252277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:37,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:37,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256676566] [2022-11-02 20:50:37,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:37,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:37,473 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 75 [2022-11-02 20:50:37,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 745 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:37,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 75 [2022-11-02 20:50:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:39,357 INFO L130 PetriNetUnfolder]: 4582/9914 cut-off events. [2022-11-02 20:50:39,357 INFO L131 PetriNetUnfolder]: For 32085/32829 co-relation queries the response was YES. [2022-11-02 20:50:39,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34614 conditions, 9914 events. 4582/9914 cut-off events. For 32085/32829 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 97827 event pairs, 1950 based on Foata normal form. 96/8902 useless extension candidates. Maximal degree in co-relation 34536. Up to 5307 conditions per place. [2022-11-02 20:50:39,506 INFO L137 encePairwiseOnDemand]: 69/75 looper letters, 72 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2022-11-02 20:50:39,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 1392 flow [2022-11-02 20:50:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2022-11-02 20:50:39,508 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8488888888888889 [2022-11-02 20:50:39,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2022-11-02 20:50:39,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2022-11-02 20:50:39,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:39,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2022-11-02 20:50:39,510 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) [2022-11-02 20:50:39,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:39,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:39,511 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 745 flow. Second operand 3 states and 191 transitions. [2022-11-02 20:50:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 1392 flow [2022-11-02 20:50:39,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 157 transitions, 1368 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:39,613 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1163 flow [2022-11-02 20:50:39,614 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1163, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2022-11-02 20:50:39,615 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 21 predicate places. [2022-11-02 20:50:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1163 flow [2022-11-02 20:50:39,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:39,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:39,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:39,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:50:39,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash -399567784, now seen corresponding path program 1 times [2022-11-02 20:50:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:39,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089384398] [2022-11-02 20:50:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:39,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:39,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089384398] [2022-11-02 20:50:39,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089384398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:39,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:39,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160311246] [2022-11-02 20:50:39,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:39,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:39,859 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-11-02 20:50:39,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1163 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:39,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:39,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-11-02 20:50:39,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:42,985 INFO L130 PetriNetUnfolder]: 7882/17707 cut-off events. [2022-11-02 20:50:42,985 INFO L131 PetriNetUnfolder]: For 78129/130534 co-relation queries the response was YES. [2022-11-02 20:50:43,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66790 conditions, 17707 events. 7882/17707 cut-off events. For 78129/130534 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 192383 event pairs, 1768 based on Foata normal form. 698/16886 useless extension candidates. Maximal degree in co-relation 66692. Up to 4126 conditions per place. [2022-11-02 20:50:43,317 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 133 selfloop transitions, 113 changer transitions 0/294 dead transitions. [2022-11-02 20:50:43,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 294 transitions, 3422 flow [2022-11-02 20:50:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:43,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:50:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 438 transitions. [2022-11-02 20:50:43,320 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8342857142857143 [2022-11-02 20:50:43,320 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 438 transitions. [2022-11-02 20:50:43,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 438 transitions. [2022-11-02 20:50:43,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:43,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 438 transitions. [2022-11-02 20:50:43,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.57142857142857) internal successors, (438), 7 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:43,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:43,326 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:43,326 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1163 flow. Second operand 7 states and 438 transitions. [2022-11-02 20:50:43,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 294 transitions, 3422 flow [2022-11-02 20:50:43,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 294 transitions, 3266 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:50:43,669 INFO L231 Difference]: Finished difference. Result has 112 places, 225 transitions, 2725 flow [2022-11-02 20:50:43,669 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=112, PETRI_TRANSITIONS=225} [2022-11-02 20:50:43,670 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 29 predicate places. [2022-11-02 20:50:43,670 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 225 transitions, 2725 flow [2022-11-02 20:50:43,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:43,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:43,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:43,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:50:43,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash -186041482, now seen corresponding path program 2 times [2022-11-02 20:50:43,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726387486] [2022-11-02 20:50:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:43,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726387486] [2022-11-02 20:50:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726387486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:43,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:43,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025322369] [2022-11-02 20:50:43,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:43,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:43,751 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-11-02 20:50:43,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 225 transitions, 2725 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:43,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:43,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-11-02 20:50:43,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:46,916 INFO L130 PetriNetUnfolder]: 7684/17574 cut-off events. [2022-11-02 20:50:46,916 INFO L131 PetriNetUnfolder]: For 88913/92449 co-relation queries the response was YES. [2022-11-02 20:50:47,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73900 conditions, 17574 events. 7684/17574 cut-off events. For 88913/92449 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 193854 event pairs, 1575 based on Foata normal form. 370/16558 useless extension candidates. Maximal degree in co-relation 73796. Up to 4041 conditions per place. [2022-11-02 20:50:47,154 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 122 selfloop transitions, 140 changer transitions 0/310 dead transitions. [2022-11-02 20:50:47,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 310 transitions, 4160 flow [2022-11-02 20:50:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:50:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 381 transitions. [2022-11-02 20:50:47,156 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8466666666666667 [2022-11-02 20:50:47,156 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 381 transitions. [2022-11-02 20:50:47,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 381 transitions. [2022-11-02 20:50:47,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:47,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 381 transitions. [2022-11-02 20:50:47,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:47,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:47,159 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:47,160 INFO L175 Difference]: Start difference. First operand has 112 places, 225 transitions, 2725 flow. Second operand 6 states and 381 transitions. [2022-11-02 20:50:47,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 310 transitions, 4160 flow [2022-11-02 20:50:47,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 310 transitions, 4144 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:47,708 INFO L231 Difference]: Finished difference. Result has 121 places, 261 transitions, 3846 flow [2022-11-02 20:50:47,709 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3846, PETRI_PLACES=121, PETRI_TRANSITIONS=261} [2022-11-02 20:50:47,709 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 38 predicate places. [2022-11-02 20:50:47,710 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 261 transitions, 3846 flow [2022-11-02 20:50:47,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:47,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:47,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:47,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:50:47,711 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash 429602850, now seen corresponding path program 1 times [2022-11-02 20:50:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:47,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110679887] [2022-11-02 20:50:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:47,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:47,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:47,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110679887] [2022-11-02 20:50:47,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110679887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:47,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:47,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:47,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472883637] [2022-11-02 20:50:47,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:47,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:47,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:47,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:47,771 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-11-02 20:50:47,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 261 transitions, 3846 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:47,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:47,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-11-02 20:50:47,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:52,813 INFO L130 PetriNetUnfolder]: 11080/25867 cut-off events. [2022-11-02 20:50:52,814 INFO L131 PetriNetUnfolder]: For 175846/176115 co-relation queries the response was YES. [2022-11-02 20:50:52,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121436 conditions, 25867 events. 11080/25867 cut-off events. For 175846/176115 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 307126 event pairs, 1849 based on Foata normal form. 236/24162 useless extension candidates. Maximal degree in co-relation 121343. Up to 6382 conditions per place. [2022-11-02 20:50:53,230 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 227 selfloop transitions, 195 changer transitions 0/471 dead transitions. [2022-11-02 20:50:53,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 471 transitions, 7720 flow [2022-11-02 20:50:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:50:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 436 transitions. [2022-11-02 20:50:53,233 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8304761904761905 [2022-11-02 20:50:53,233 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 436 transitions. [2022-11-02 20:50:53,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 436 transitions. [2022-11-02 20:50:53,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:53,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 436 transitions. [2022-11-02 20:50:53,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,237 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,237 INFO L175 Difference]: Start difference. First operand has 121 places, 261 transitions, 3846 flow. Second operand 7 states and 436 transitions. [2022-11-02 20:50:53,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 471 transitions, 7720 flow [2022-11-02 20:50:54,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 471 transitions, 7656 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:55,010 INFO L231 Difference]: Finished difference. Result has 131 places, 388 transitions, 6700 flow [2022-11-02 20:50:55,010 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3820, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6700, PETRI_PLACES=131, PETRI_TRANSITIONS=388} [2022-11-02 20:50:55,011 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 48 predicate places. [2022-11-02 20:50:55,011 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 388 transitions, 6700 flow [2022-11-02 20:50:55,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:55,012 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:55,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:50:55,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:50:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1114111966, now seen corresponding path program 2 times [2022-11-02 20:50:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:55,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992990603] [2022-11-02 20:50:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:55,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:50:55,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992990603] [2022-11-02 20:50:55,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992990603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:55,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:55,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531196675] [2022-11-02 20:50:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:55,187 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2022-11-02 20:50:55,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 388 transitions, 6700 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:55,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2022-11-02 20:50:55,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:00,618 INFO L130 PetriNetUnfolder]: 10904/26440 cut-off events. [2022-11-02 20:51:00,618 INFO L131 PetriNetUnfolder]: For 223226/223305 co-relation queries the response was YES. [2022-11-02 20:51:00,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135081 conditions, 26440 events. 10904/26440 cut-off events. For 223226/223305 co-relation queries the response was YES. Maximal size of possible extension queue 2149. Compared 323440 event pairs, 2117 based on Foata normal form. 236/24630 useless extension candidates. Maximal degree in co-relation 134983. Up to 5758 conditions per place. [2022-11-02 20:51:01,052 INFO L137 encePairwiseOnDemand]: 65/75 looper letters, 241 selfloop transitions, 225 changer transitions 0/515 dead transitions. [2022-11-02 20:51:01,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 515 transitions, 9548 flow [2022-11-02 20:51:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:51:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:51:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-11-02 20:51:01,059 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.84 [2022-11-02 20:51:01,059 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-11-02 20:51:01,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-11-02 20:51:01,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:01,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-11-02 20:51:01,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:01,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:01,066 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:01,066 INFO L175 Difference]: Start difference. First operand has 131 places, 388 transitions, 6700 flow. Second operand 6 states and 378 transitions. [2022-11-02 20:51:01,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 515 transitions, 9548 flow [2022-11-02 20:51:03,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 515 transitions, 9536 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:03,063 INFO L231 Difference]: Finished difference. Result has 140 places, 447 transitions, 8716 flow [2022-11-02 20:51:03,063 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8716, PETRI_PLACES=140, PETRI_TRANSITIONS=447} [2022-11-02 20:51:03,064 INFO L287 CegarLoopForPetriNet]: 83 programPoint places, 57 predicate places. [2022-11-02 20:51:03,064 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 447 transitions, 8716 flow [2022-11-02 20:51:03,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:03,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:03,064 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:03,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:51:03,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:51:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -791742585, now seen corresponding path program 1 times [2022-11-02 20:51:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713495655] [2022-11-02 20:51:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:03,085 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:51:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:03,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:51:03,105 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:51:03,105 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:51:03,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:51:03,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:51:03,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:51:03,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:51:03,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:51:03,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:51:03,106 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2022-11-02 20:51:03,109 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:51:03,109 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:51:03,133 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:51:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 86 transitions, 217 flow [2022-11-02 20:51:03,153 INFO L130 PetriNetUnfolder]: 6/149 cut-off events. [2022-11-02 20:51:03,153 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:51:03,154 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 271 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. [2022-11-02 20:51:03,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 86 transitions, 217 flow [2022-11-02 20:51:03,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 86 transitions, 217 flow [2022-11-02 20:51:03,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:03,159 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;@6db9b627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:03,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:51:03,162 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-02 20:51:03,162 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:51:03,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:03,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:03,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:51:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1615531528, now seen corresponding path program 1 times [2022-11-02 20:51:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:03,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857049262] [2022-11-02 20:51:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857049262] [2022-11-02 20:51:03,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857049262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:03,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:03,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037492539] [2022-11-02 20:51:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:03,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:03,204 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 86 [2022-11-02 20:51:03,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 217 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) [2022-11-02 20:51:03,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:03,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 86 [2022-11-02 20:51:03,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:04,578 INFO L130 PetriNetUnfolder]: 7474/12642 cut-off events. [2022-11-02 20:51:04,578 INFO L131 PetriNetUnfolder]: For 9085/9085 co-relation queries the response was YES. [2022-11-02 20:51:04,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26655 conditions, 12642 events. 7474/12642 cut-off events. For 9085/9085 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 100974 event pairs, 5008 based on Foata normal form. 2714/12500 useless extension candidates. Maximal degree in co-relation 17174. Up to 7750 conditions per place. [2022-11-02 20:51:04,700 INFO L137 encePairwiseOnDemand]: 77/86 looper letters, 35 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2022-11-02 20:51:04,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 351 flow [2022-11-02 20:51:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2022-11-02 20:51:04,701 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.875968992248062 [2022-11-02 20:51:04,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2022-11-02 20:51:04,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2022-11-02 20:51:04,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:04,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2022-11-02 20:51:04,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:04,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:04,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:04,704 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 217 flow. Second operand 3 states and 226 transitions. [2022-11-02 20:51:04,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 351 flow [2022-11-02 20:51:04,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 319 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:04,708 INFO L231 Difference]: Finished difference. Result has 94 places, 84 transitions, 229 flow [2022-11-02 20:51:04,709 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2022-11-02 20:51:04,709 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2022-11-02 20:51:04,709 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 229 flow [2022-11-02 20:51:04,710 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) [2022-11-02 20:51:04,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:04,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:04,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:51:04,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:51:04,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash -275840951, now seen corresponding path program 1 times [2022-11-02 20:51:04,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:04,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028226827] [2022-11-02 20:51:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:51:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:04,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028226827] [2022-11-02 20:51:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028226827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:04,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:04,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:04,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980129294] [2022-11-02 20:51:04,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:04,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:04,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:04,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:04,736 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 86 [2022-11-02 20:51:04,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 229 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) [2022-11-02 20:51:04,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:04,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 86 [2022-11-02 20:51:04,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:06,628 INFO L130 PetriNetUnfolder]: 10409/18022 cut-off events. [2022-11-02 20:51:06,628 INFO L131 PetriNetUnfolder]: For 11040/11040 co-relation queries the response was YES. [2022-11-02 20:51:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43118 conditions, 18022 events. 10409/18022 cut-off events. For 11040/11040 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 154289 event pairs, 5778 based on Foata normal form. 0/14837 useless extension candidates. Maximal degree in co-relation 43052. Up to 10999 conditions per place. [2022-11-02 20:51:06,798 INFO L137 encePairwiseOnDemand]: 79/86 looper letters, 39 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2022-11-02 20:51:06,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 104 transitions, 412 flow [2022-11-02 20:51:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2022-11-02 20:51:06,800 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8565891472868217 [2022-11-02 20:51:06,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2022-11-02 20:51:06,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2022-11-02 20:51:06,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:06,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2022-11-02 20:51:06,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 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) [2022-11-02 20:51:06,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:06,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:06,801 INFO L175 Difference]: Start difference. First operand has 94 places, 84 transitions, 229 flow. Second operand 3 states and 221 transitions. [2022-11-02 20:51:06,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 104 transitions, 412 flow [2022-11-02 20:51:06,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 104 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:51:06,841 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 305 flow [2022-11-02 20:51:06,841 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2022-11-02 20:51:06,842 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-11-02 20:51:06,842 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 305 flow [2022-11-02 20:51:06,842 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) [2022-11-02 20:51:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:06,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:51:06,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:51:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1502870282, now seen corresponding path program 1 times [2022-11-02 20:51:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:06,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439019152] [2022-11-02 20:51:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:51:06,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:06,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439019152] [2022-11-02 20:51:06,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439019152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:06,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:06,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:51:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072902391] [2022-11-02 20:51:06,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:06,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:51:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:51:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:51:06,917 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2022-11-02 20:51:06,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:06,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:06,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2022-11-02 20:51:06,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:11,599 INFO L130 PetriNetUnfolder]: 21834/36235 cut-off events. [2022-11-02 20:51:11,599 INFO L131 PetriNetUnfolder]: For 27039/27039 co-relation queries the response was YES. [2022-11-02 20:51:11,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98544 conditions, 36235 events. 21834/36235 cut-off events. For 27039/27039 co-relation queries the response was YES. Maximal size of possible extension queue 1931. Compared 320586 event pairs, 3234 based on Foata normal form. 170/29762 useless extension candidates. Maximal degree in co-relation 98462. Up to 10933 conditions per place. [2022-11-02 20:51:11,934 INFO L137 encePairwiseOnDemand]: 75/86 looper letters, 96 selfloop transitions, 35 changer transitions 0/184 dead transitions. [2022-11-02 20:51:11,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 1001 flow [2022-11-02 20:51:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:51:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:51:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 517 transitions. [2022-11-02 20:51:11,936 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8588039867109635 [2022-11-02 20:51:11,936 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 517 transitions. [2022-11-02 20:51:11,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 517 transitions. [2022-11-02 20:51:11,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:11,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 517 transitions. [2022-11-02 20:51:11,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:11,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:11,940 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:11,940 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 305 flow. Second operand 7 states and 517 transitions. [2022-11-02 20:51:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 1001 flow [2022-11-02 20:51:12,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 184 transitions, 949 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:51:12,207 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 581 flow [2022-11-02 20:51:12,207 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=581, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2022-11-02 20:51:12,207 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, 8 predicate places. [2022-11-02 20:51:12,207 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 581 flow [2022-11-02 20:51:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:12,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:12,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:12,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:51:12,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:51:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1097776560, now seen corresponding path program 2 times [2022-11-02 20:51:12,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077982799] [2022-11-02 20:51:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:51:12,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:12,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077982799] [2022-11-02 20:51:12,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077982799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:12,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:12,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:51:12,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363773557] [2022-11-02 20:51:12,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:12,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:51:12,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:51:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:51:12,259 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2022-11-02 20:51:12,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 581 flow. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:12,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:12,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2022-11-02 20:51:12,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:17,447 INFO L130 PetriNetUnfolder]: 22143/38290 cut-off events. [2022-11-02 20:51:17,447 INFO L131 PetriNetUnfolder]: For 53115/53199 co-relation queries the response was YES. [2022-11-02 20:51:17,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116105 conditions, 38290 events. 22143/38290 cut-off events. For 53115/53199 co-relation queries the response was YES. Maximal size of possible extension queue 2094. Compared 357001 event pairs, 5832 based on Foata normal form. 349/32666 useless extension candidates. Maximal degree in co-relation 67760. Up to 10158 conditions per place. [2022-11-02 20:51:18,171 INFO L137 encePairwiseOnDemand]: 75/86 looper letters, 94 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2022-11-02 20:51:18,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 190 transitions, 1240 flow [2022-11-02 20:51:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:51:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:51:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 446 transitions. [2022-11-02 20:51:18,173 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8643410852713178 [2022-11-02 20:51:18,173 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 446 transitions. [2022-11-02 20:51:18,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 446 transitions. [2022-11-02 20:51:18,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:18,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 446 transitions. [2022-11-02 20:51:18,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:18,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:18,176 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:18,176 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 581 flow. Second operand 6 states and 446 transitions. [2022-11-02 20:51:18,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 190 transitions, 1240 flow [2022-11-02 20:51:18,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 190 transitions, 1234 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:18,380 INFO L231 Difference]: Finished difference. Result has 113 places, 135 transitions, 902 flow [2022-11-02 20:51:18,381 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=113, PETRI_TRANSITIONS=135} [2022-11-02 20:51:18,381 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, 17 predicate places. [2022-11-02 20:51:18,381 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 135 transitions, 902 flow [2022-11-02 20:51:18,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:18,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:18,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:18,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:51:18,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:51:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2018012865, now seen corresponding path program 1 times [2022-11-02 20:51:18,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:18,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007185622] [2022-11-02 20:51:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:18,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:51:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007185622] [2022-11-02 20:51:18,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007185622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:18,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:18,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:18,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015228923] [2022-11-02 20:51:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:18,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:18,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:18,421 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 86 [2022-11-02 20:51:18,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 135 transitions, 902 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) [2022-11-02 20:51:18,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:18,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 86 [2022-11-02 20:51:18,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:27,482 INFO L130 PetriNetUnfolder]: 31761/57095 cut-off events. [2022-11-02 20:51:27,482 INFO L131 PetriNetUnfolder]: For 197038/201168 co-relation queries the response was YES. [2022-11-02 20:51:27,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199148 conditions, 57095 events. 31761/57095 cut-off events. For 197038/201168 co-relation queries the response was YES. Maximal size of possible extension queue 3391. Compared 592309 event pairs, 14416 based on Foata normal form. 510/49462 useless extension candidates. Maximal degree in co-relation 199069. Up to 34159 conditions per place. [2022-11-02 20:51:28,103 INFO L137 encePairwiseOnDemand]: 79/86 looper letters, 90 selfloop transitions, 45 changer transitions 0/193 dead transitions. [2022-11-02 20:51:28,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 1764 flow [2022-11-02 20:51:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2022-11-02 20:51:28,105 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8527131782945736 [2022-11-02 20:51:28,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2022-11-02 20:51:28,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2022-11-02 20:51:28,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:28,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2022-11-02 20:51:28,106 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) [2022-11-02 20:51:28,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:28,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:28,107 INFO L175 Difference]: Start difference. First operand has 113 places, 135 transitions, 902 flow. Second operand 3 states and 220 transitions. [2022-11-02 20:51:28,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 1764 flow [2022-11-02 20:51:29,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 193 transitions, 1740 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:29,087 INFO L231 Difference]: Finished difference. Result has 117 places, 169 transitions, 1534 flow [2022-11-02 20:51:29,087 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1534, PETRI_PLACES=117, PETRI_TRANSITIONS=169} [2022-11-02 20:51:29,087 INFO L287 CegarLoopForPetriNet]: 96 programPoint places, 21 predicate places. [2022-11-02 20:51:29,087 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 169 transitions, 1534 flow [2022-11-02 20:51:29,087 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) [2022-11-02 20:51:29,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:29,088 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:29,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-02 20:51:29,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:51:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2050136410, now seen corresponding path program 1 times [2022-11-02 20:51:29,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:29,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715287986] [2022-11-02 20:51:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:29,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:51:29,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:29,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715287986] [2022-11-02 20:51:29,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715287986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:29,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:29,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:51:29,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851520641] [2022-11-02 20:51:29,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:51:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:51:29,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:51:29,145 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2022-11-02 20:51:29,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 169 transitions, 1534 flow. Second operand has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:29,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:29,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2022-11-02 20:51:29,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand