./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/ring_1w1r-2.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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_1w1r-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/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 b7e9feb6929ab81158cc9d6731414a71af210f92cb571da2954e02689fee6d2b --- 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 21:07:15,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:07:15,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:07:15,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:07:15,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:07:15,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:07:15,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:07:15,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:07:15,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:07:15,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:07:15,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:07:15,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:07:15,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:07:15,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:07:15,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:07:15,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:07:15,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:07:15,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:07:15,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:07:15,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:07:15,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:07:15,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:07:15,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:07:15,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:07:15,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:07:15,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:07:15,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:07:15,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:07:15,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:07:15,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:07:15,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:07:15,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:07:15,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:07:15,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:07:16,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:07:16,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:07:16,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:07:16,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:07:16,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:07:16,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:07:16,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:07:16,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:07:16,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:07:16,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:07:16,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:07:16,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:07:16,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:07:16,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:07:16,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:07:16,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:07:16,060 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:07:16,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:07:16,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:07:16,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:07:16,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:07:16,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:07:16,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:07:16,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:07:16,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:07:16,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:07:16,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:07:16,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:07:16,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:07:16,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:07:16,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:07:16,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:07:16,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:16,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:07:16,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:07:16,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:07:16,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:07:16,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:07:16,068 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:07:16,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:07:16,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:07:16,069 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e9feb6929ab81158cc9d6731414a71af210f92cb571da2954e02689fee6d2b [2022-11-02 21:07:16,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:07:16,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:07:16,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:07:16,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:07:16,492 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:07:16,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-divine/ring_1w1r-2.i [2022-11-02 21:07:16,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/data/ae003ace8/bb83a592128547f3a4ace03509052849/FLAGdce4a449f [2022-11-02 21:07:17,332 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:07:17,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i [2022-11-02 21:07:17,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/data/ae003ace8/bb83a592128547f3a4ace03509052849/FLAGdce4a449f [2022-11-02 21:07:17,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/data/ae003ace8/bb83a592128547f3a4ace03509052849 [2022-11-02 21:07:17,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:07:17,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:07:17,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:17,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:07:17,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:07:17,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:17" (1/1) ... [2022-11-02 21:07:17,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9b753b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:17, skipping insertion in model container [2022-11-02 21:07:17,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:17" (1/1) ... [2022-11-02 21:07:17,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:07:17,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:07:17,848 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 21:07:18,211 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39095,39108] [2022-11-02 21:07:18,218 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39180,39193] [2022-11-02 21:07:18,219 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39232,39245] [2022-11-02 21:07:18,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:18,247 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:07:18,271 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 21:07:18,318 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39095,39108] [2022-11-02 21:07:18,319 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39180,39193] [2022-11-02 21:07:18,320 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_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39232,39245] [2022-11-02 21:07:18,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:18,405 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:07:18,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18 WrapperNode [2022-11-02 21:07:18,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:18,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:18,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:07:18,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:07:18,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,501 INFO L138 Inliner]: procedures = 224, calls = 41, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2022-11-02 21:07:18,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:18,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:07:18,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:07:18,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:07:18,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:07:18,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:07:18,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:07:18,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:07:18,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (1/1) ... [2022-11-02 21:07:18,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:18,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:07:18,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2ffdfc2-97a8-4f67-8865-7d6aa4987784/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:07:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure reader_fn [2022-11-02 21:07:18,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_fn [2022-11-02 21:07:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:07:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:07:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:07:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:07:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:07:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:07:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:07:18,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:07:18,685 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 21:07:18,875 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:07:18,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:07:19,262 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:07:19,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:07:19,273 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:07:19,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:19 BoogieIcfgContainer [2022-11-02 21:07:19,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:07:19,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:07:19,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:07:19,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:07:19,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:07:17" (1/3) ... [2022-11-02 21:07:19,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8c7fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:19, skipping insertion in model container [2022-11-02 21:07:19,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:18" (2/3) ... [2022-11-02 21:07:19,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8c7fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:19, skipping insertion in model container [2022-11-02 21:07:19,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:19" (3/3) ... [2022-11-02 21:07:19,292 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_1w1r-2.i [2022-11-02 21:07:19,303 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:07:19,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:07:19,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-02 21:07:19,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:07:19,451 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 21:07:19,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 158 transitions, 324 flow [2022-11-02 21:07:19,626 INFO L130 PetriNetUnfolder]: 10/157 cut-off events. [2022-11-02 21:07:19,626 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:07:19,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 10/157 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 269 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2022-11-02 21:07:19,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 158 transitions, 324 flow [2022-11-02 21:07:19,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 148 transitions, 299 flow [2022-11-02 21:07:19,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:19,672 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;@3bc1a032, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:19,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 21:07:19,689 INFO L130 PetriNetUnfolder]: 2/51 cut-off events. [2022-11-02 21:07:19,689 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:07:19,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:19,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:19,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash 847621616, now seen corresponding path program 1 times [2022-11-02 21:07:19,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:19,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132300805] [2022-11-02 21:07:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:19,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:20,082 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 21:07:20,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132300805] [2022-11-02 21:07:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132300805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:20,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:20,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:07:20,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333138964] [2022-11-02 21:07:20,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:20,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:07:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:07:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:07:20,151 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 158 [2022-11-02 21:07:20,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 148 transitions, 299 flow. Second operand has 2 states, 2 states have (on average 151.0) internal successors, (302), 2 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 21:07:20,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:20,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 158 [2022-11-02 21:07:20,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:20,270 INFO L130 PetriNetUnfolder]: 4/142 cut-off events. [2022-11-02 21:07:20,273 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:07:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 142 events. 4/142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 0 based on Foata normal form. 6/141 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-02 21:07:20,281 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 1 selfloop transitions, 0 changer transitions 0/142 dead transitions. [2022-11-02 21:07:20,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 142 transitions, 289 flow [2022-11-02 21:07:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:07:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 21:07:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 307 transitions. [2022-11-02 21:07:20,299 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9715189873417721 [2022-11-02 21:07:20,299 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 307 transitions. [2022-11-02 21:07:20,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 307 transitions. [2022-11-02 21:07:20,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:20,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 307 transitions. [2022-11-02 21:07:20,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.5) internal successors, (307), 2 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 21:07:20,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 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 21:07:20,316 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 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 21:07:20,318 INFO L175 Difference]: Start difference. First operand has 142 places, 148 transitions, 299 flow. Second operand 2 states and 307 transitions. [2022-11-02 21:07:20,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 142 transitions, 289 flow [2022-11-02 21:07:20,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:07:20,328 INFO L231 Difference]: Finished difference. Result has 142 places, 142 transitions, 286 flow [2022-11-02 21:07:20,331 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=286, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2022-11-02 21:07:20,335 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 0 predicate places. [2022-11-02 21:07:20,336 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 286 flow [2022-11-02 21:07:20,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 151.0) internal successors, (302), 2 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 21:07:20,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:20,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:07:20,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 506434889, now seen corresponding path program 1 times [2022-11-02 21:07:20,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:20,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514369661] [2022-11-02 21:07:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:20,619 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 21:07:20,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514369661] [2022-11-02 21:07:20,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514369661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:20,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:20,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:20,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157835372] [2022-11-02 21:07:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:20,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:20,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:20,630 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 158 [2022-11-02 21:07:20,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 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 21:07:20,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:20,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 158 [2022-11-02 21:07:20,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:20,712 INFO L130 PetriNetUnfolder]: 5/185 cut-off events. [2022-11-02 21:07:20,713 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:07:20,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 185 events. 5/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 196. Up to 7 conditions per place. [2022-11-02 21:07:20,716 INFO L137 encePairwiseOnDemand]: 155/158 looper letters, 7 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2022-11-02 21:07:20,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 145 transitions, 310 flow [2022-11-02 21:07:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:07:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2022-11-02 21:07:20,721 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9388185654008439 [2022-11-02 21:07:20,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2022-11-02 21:07:20,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2022-11-02 21:07:20,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:20,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2022-11-02 21:07:20,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 21:07:20,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 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 21:07:20,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 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 21:07:20,729 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 286 flow. Second operand 3 states and 445 transitions. [2022-11-02 21:07:20,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 145 transitions, 310 flow [2022-11-02 21:07:20,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 145 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:07:20,734 INFO L231 Difference]: Finished difference. Result has 145 places, 143 transitions, 298 flow [2022-11-02 21:07:20,735 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=145, PETRI_TRANSITIONS=143} [2022-11-02 21:07:20,736 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 3 predicate places. [2022-11-02 21:07:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 143 transitions, 298 flow [2022-11-02 21:07:20,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 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 21:07:20,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:20,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:20,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:07:20,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:20,739 INFO L85 PathProgramCache]: Analyzing trace with hash -654644372, now seen corresponding path program 1 times [2022-11-02 21:07:20,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:20,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324024146] [2022-11-02 21:07:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:22,388 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 21:07:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:22,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324024146] [2022-11-02 21:07:22,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324024146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:22,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:22,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-02 21:07:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253600947] [2022-11-02 21:07:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:07:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:07:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:07:22,396 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 158 [2022-11-02 21:07:22,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 143 transitions, 298 flow. Second operand has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 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 21:07:22,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:22,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 158 [2022-11-02 21:07:22,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:25,310 INFO L130 PetriNetUnfolder]: 583/2004 cut-off events. [2022-11-02 21:07:25,310 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 21:07:25,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 2004 events. 583/2004 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12930 event pairs, 252 based on Foata normal form. 0/1894 useless extension candidates. Maximal degree in co-relation 3127. Up to 766 conditions per place. [2022-11-02 21:07:25,324 INFO L137 encePairwiseOnDemand]: 137/158 looper letters, 129 selfloop transitions, 34 changer transitions 10/255 dead transitions. [2022-11-02 21:07:25,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 868 flow [2022-11-02 21:07:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:07:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 21:07:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2067 transitions. [2022-11-02 21:07:25,368 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5946490218642118 [2022-11-02 21:07:25,368 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2067 transitions. [2022-11-02 21:07:25,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2067 transitions. [2022-11-02 21:07:25,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:25,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2067 transitions. [2022-11-02 21:07:25,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 93.95454545454545) internal successors, (2067), 22 states have internal predecessors, (2067), 0 states have call successors, (0), 0 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 21:07:25,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 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 21:07:25,389 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 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 21:07:25,389 INFO L175 Difference]: Start difference. First operand has 145 places, 143 transitions, 298 flow. Second operand 22 states and 2067 transitions. [2022-11-02 21:07:25,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 868 flow [2022-11-02 21:07:25,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 255 transitions, 866 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:07:25,397 INFO L231 Difference]: Finished difference. Result has 175 places, 174 transitions, 503 flow [2022-11-02 21:07:25,397 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=503, PETRI_PLACES=175, PETRI_TRANSITIONS=174} [2022-11-02 21:07:25,398 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 33 predicate places. [2022-11-02 21:07:25,399 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 174 transitions, 503 flow [2022-11-02 21:07:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 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 21:07:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:25,400 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:07:25,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2143908831, now seen corresponding path program 1 times [2022-11-02 21:07:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:25,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710544647] [2022-11-02 21:07:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:25,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:27,594 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 21:07:27,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:27,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710544647] [2022-11-02 21:07:27,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710544647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:27,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:27,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:07:27,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994914642] [2022-11-02 21:07:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:27,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:07:27,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:07:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:07:27,612 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:07:27,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 174 transitions, 503 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:07:27,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:27,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:07:27,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:35,037 INFO L130 PetriNetUnfolder]: 1897/5427 cut-off events. [2022-11-02 21:07:35,037 INFO L131 PetriNetUnfolder]: For 1616/1621 co-relation queries the response was YES. [2022-11-02 21:07:35,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11034 conditions, 5427 events. 1897/5427 cut-off events. For 1616/1621 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 38936 event pairs, 630 based on Foata normal form. 20/5210 useless extension candidates. Maximal degree in co-relation 11019. Up to 1877 conditions per place. [2022-11-02 21:07:35,083 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 337 selfloop transitions, 91 changer transitions 3/502 dead transitions. [2022-11-02 21:07:35,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 502 transitions, 2593 flow [2022-11-02 21:07:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 21:07:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-02 21:07:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3138 transitions. [2022-11-02 21:07:35,092 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5367772836127267 [2022-11-02 21:07:35,092 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3138 transitions. [2022-11-02 21:07:35,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3138 transitions. [2022-11-02 21:07:35,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:35,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3138 transitions. [2022-11-02 21:07:35,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.8108108108108) internal successors, (3138), 37 states have internal predecessors, (3138), 0 states have call successors, (0), 0 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 21:07:35,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 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 21:07:35,122 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 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 21:07:35,122 INFO L175 Difference]: Start difference. First operand has 175 places, 174 transitions, 503 flow. Second operand 37 states and 3138 transitions. [2022-11-02 21:07:35,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 502 transitions, 2593 flow [2022-11-02 21:07:35,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 502 transitions, 2582 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:35,149 INFO L231 Difference]: Finished difference. Result has 230 places, 255 transitions, 1245 flow [2022-11-02 21:07:35,150 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1245, PETRI_PLACES=230, PETRI_TRANSITIONS=255} [2022-11-02 21:07:35,157 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 88 predicate places. [2022-11-02 21:07:35,157 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 255 transitions, 1245 flow [2022-11-02 21:07:35,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:07:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:35,159 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:07:35,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1028678017, now seen corresponding path program 2 times [2022-11-02 21:07:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:35,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478941917] [2022-11-02 21:07:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:37,376 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 21:07:37,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:37,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478941917] [2022-11-02 21:07:37,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478941917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:37,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:37,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:07:37,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212210665] [2022-11-02 21:07:37,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:37,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:07:37,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:07:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:07:37,381 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:07:37,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 255 transitions, 1245 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:07:37,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:37,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:07:37,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:45,193 INFO L130 PetriNetUnfolder]: 2297/6564 cut-off events. [2022-11-02 21:07:45,193 INFO L131 PetriNetUnfolder]: For 8315/8318 co-relation queries the response was YES. [2022-11-02 21:07:45,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16910 conditions, 6564 events. 2297/6564 cut-off events. For 8315/8318 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 50168 event pairs, 433 based on Foata normal form. 18/6299 useless extension candidates. Maximal degree in co-relation 16870. Up to 2347 conditions per place. [2022-11-02 21:07:45,280 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 367 selfloop transitions, 116 changer transitions 1/555 dead transitions. [2022-11-02 21:07:45,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 555 transitions, 3917 flow [2022-11-02 21:07:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 21:07:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-02 21:07:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3117 transitions. [2022-11-02 21:07:45,291 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5331850838179952 [2022-11-02 21:07:45,291 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3117 transitions. [2022-11-02 21:07:45,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3117 transitions. [2022-11-02 21:07:45,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:45,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3117 transitions. [2022-11-02 21:07:45,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.24324324324324) internal successors, (3117), 37 states have internal predecessors, (3117), 0 states have call successors, (0), 0 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 21:07:45,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 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 21:07:45,318 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 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 21:07:45,318 INFO L175 Difference]: Start difference. First operand has 230 places, 255 transitions, 1245 flow. Second operand 37 states and 3117 transitions. [2022-11-02 21:07:45,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 555 transitions, 3917 flow [2022-11-02 21:07:45,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 555 transitions, 3890 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:45,365 INFO L231 Difference]: Finished difference. Result has 283 places, 326 transitions, 2220 flow [2022-11-02 21:07:45,366 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2220, PETRI_PLACES=283, PETRI_TRANSITIONS=326} [2022-11-02 21:07:45,370 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 141 predicate places. [2022-11-02 21:07:45,371 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 326 transitions, 2220 flow [2022-11-02 21:07:45,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:07:45,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:45,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:45,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:07:45,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1366726909, now seen corresponding path program 3 times [2022-11-02 21:07:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:45,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030010913] [2022-11-02 21:07:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:47,183 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 21:07:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:47,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030010913] [2022-11-02 21:07:47,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030010913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:47,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:47,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-02 21:07:47,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58759976] [2022-11-02 21:07:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:47,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:07:47,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:07:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:07:47,188 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 158 [2022-11-02 21:07:47,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 326 transitions, 2220 flow. Second operand has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 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 21:07:47,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:47,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 158 [2022-11-02 21:07:47,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:55,124 INFO L130 PetriNetUnfolder]: 2442/7287 cut-off events. [2022-11-02 21:07:55,124 INFO L131 PetriNetUnfolder]: For 22169/22324 co-relation queries the response was YES. [2022-11-02 21:07:55,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23478 conditions, 7287 events. 2442/7287 cut-off events. For 22169/22324 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 60587 event pairs, 647 based on Foata normal form. 71/7096 useless extension candidates. Maximal degree in co-relation 23415. Up to 2662 conditions per place. [2022-11-02 21:07:55,241 INFO L137 encePairwiseOnDemand]: 129/158 looper letters, 403 selfloop transitions, 154 changer transitions 14/650 dead transitions. [2022-11-02 21:07:55,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 650 transitions, 5727 flow [2022-11-02 21:07:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 21:07:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-02 21:07:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3356 transitions. [2022-11-02 21:07:55,250 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.558960692871419 [2022-11-02 21:07:55,250 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3356 transitions. [2022-11-02 21:07:55,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3356 transitions. [2022-11-02 21:07:55,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:55,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3356 transitions. [2022-11-02 21:07:55,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.3157894736842) internal successors, (3356), 38 states have internal predecessors, (3356), 0 states have call successors, (0), 0 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 21:07:55,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 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 21:07:55,273 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 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 21:07:55,273 INFO L175 Difference]: Start difference. First operand has 283 places, 326 transitions, 2220 flow. Second operand 38 states and 3356 transitions. [2022-11-02 21:07:55,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 650 transitions, 5727 flow [2022-11-02 21:07:55,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 650 transitions, 5477 flow, removed 96 selfloop flow, removed 8 redundant places. [2022-11-02 21:07:55,396 INFO L231 Difference]: Finished difference. Result has 340 places, 442 transitions, 3821 flow [2022-11-02 21:07:55,397 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3821, PETRI_PLACES=340, PETRI_TRANSITIONS=442} [2022-11-02 21:07:55,398 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 198 predicate places. [2022-11-02 21:07:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 442 transitions, 3821 flow [2022-11-02 21:07:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 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 21:07:55,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:55,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:55,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:07:55,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:07:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash -272440345, now seen corresponding path program 4 times [2022-11-02 21:07:55,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:55,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899021886] [2022-11-02 21:07:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:55,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:57,493 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 21:07:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899021886] [2022-11-02 21:07:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899021886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:57,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:57,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:07:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20719224] [2022-11-02 21:07:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:07:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:07:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:07:57,499 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:07:57,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 442 transitions, 3821 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:07:57,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:57,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:07:57,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:09,183 INFO L130 PetriNetUnfolder]: 3780/10283 cut-off events. [2022-11-02 21:08:09,183 INFO L131 PetriNetUnfolder]: For 52491/52500 co-relation queries the response was YES. [2022-11-02 21:08:09,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37037 conditions, 10283 events. 3780/10283 cut-off events. For 52491/52500 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 86224 event pairs, 933 based on Foata normal form. 20/9845 useless extension candidates. Maximal degree in co-relation 36946. Up to 4127 conditions per place. [2022-11-02 21:08:09,355 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 628 selfloop transitions, 206 changer transitions 1/906 dead transitions. [2022-11-02 21:08:09,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 906 transitions, 9389 flow [2022-11-02 21:08:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 21:08:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-02 21:08:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4345 transitions. [2022-11-02 21:08:09,365 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2022-11-02 21:08:09,365 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4345 transitions. [2022-11-02 21:08:09,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4345 transitions. [2022-11-02 21:08:09,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:09,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4345 transitions. [2022-11-02 21:08:09,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 83.5576923076923) internal successors, (4345), 52 states have internal predecessors, (4345), 0 states have call successors, (0), 0 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 21:08:09,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 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 21:08:09,391 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 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 21:08:09,391 INFO L175 Difference]: Start difference. First operand has 340 places, 442 transitions, 3821 flow. Second operand 52 states and 4345 transitions. [2022-11-02 21:08:09,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 906 transitions, 9389 flow [2022-11-02 21:08:09,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 906 transitions, 8801 flow, removed 273 selfloop flow, removed 8 redundant places. [2022-11-02 21:08:09,705 INFO L231 Difference]: Finished difference. Result has 422 places, 558 transitions, 5495 flow [2022-11-02 21:08:09,706 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5495, PETRI_PLACES=422, PETRI_TRANSITIONS=558} [2022-11-02 21:08:09,706 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 280 predicate places. [2022-11-02 21:08:09,707 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 558 transitions, 5495 flow [2022-11-02 21:08:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:08:09,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:09,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:08:09,709 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1419731227, now seen corresponding path program 5 times [2022-11-02 21:08:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011283759] [2022-11-02 21:08:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:11,510 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 21:08:11,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011283759] [2022-11-02 21:08:11,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011283759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:11,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:11,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-02 21:08:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857798024] [2022-11-02 21:08:11,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:08:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:11,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:08:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:08:11,514 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 158 [2022-11-02 21:08:11,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 558 transitions, 5495 flow. Second operand has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 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 21:08:11,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:11,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 158 [2022-11-02 21:08:11,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:21,995 INFO L130 PetriNetUnfolder]: 3051/8963 cut-off events. [2022-11-02 21:08:21,995 INFO L131 PetriNetUnfolder]: For 69222/69462 co-relation queries the response was YES. [2022-11-02 21:08:22,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35626 conditions, 8963 events. 3051/8963 cut-off events. For 69222/69462 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 78733 event pairs, 694 based on Foata normal form. 96/8757 useless extension candidates. Maximal degree in co-relation 35496. Up to 2575 conditions per place. [2022-11-02 21:08:22,248 INFO L137 encePairwiseOnDemand]: 129/158 looper letters, 483 selfloop transitions, 297 changer transitions 13/906 dead transitions. [2022-11-02 21:08:22,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 906 transitions, 10356 flow [2022-11-02 21:08:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 21:08:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-02 21:08:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3496 transitions. [2022-11-02 21:08:22,261 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5531645569620253 [2022-11-02 21:08:22,261 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3496 transitions. [2022-11-02 21:08:22,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3496 transitions. [2022-11-02 21:08:22,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:22,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3496 transitions. [2022-11-02 21:08:22,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 87.4) internal successors, (3496), 40 states have internal predecessors, (3496), 0 states have call successors, (0), 0 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 21:08:22,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 158.0) internal successors, (6478), 41 states have internal predecessors, (6478), 0 states have call successors, (0), 0 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 21:08:22,283 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 158.0) internal successors, (6478), 41 states have internal predecessors, (6478), 0 states have call successors, (0), 0 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 21:08:22,283 INFO L175 Difference]: Start difference. First operand has 422 places, 558 transitions, 5495 flow. Second operand 40 states and 3496 transitions. [2022-11-02 21:08:22,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 906 transitions, 10356 flow [2022-11-02 21:08:22,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 906 transitions, 9530 flow, removed 278 selfloop flow, removed 11 redundant places. [2022-11-02 21:08:22,837 INFO L231 Difference]: Finished difference. Result has 479 places, 641 transitions, 7061 flow [2022-11-02 21:08:22,838 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7061, PETRI_PLACES=479, PETRI_TRANSITIONS=641} [2022-11-02 21:08:22,841 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 337 predicate places. [2022-11-02 21:08:22,841 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 641 transitions, 7061 flow [2022-11-02 21:08:22,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 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 21:08:22,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:22,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:22,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:08:22,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1798415853, now seen corresponding path program 6 times [2022-11-02 21:08:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285958733] [2022-11-02 21:08:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:24,647 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 21:08:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:24,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285958733] [2022-11-02 21:08:24,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285958733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:24,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:24,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:08:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60679564] [2022-11-02 21:08:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:08:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:08:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:08:24,653 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:08:24,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 641 transitions, 7061 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:08:24,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:24,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:08:24,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:35,779 INFO L130 PetriNetUnfolder]: 4564/12284 cut-off events. [2022-11-02 21:08:35,780 INFO L131 PetriNetUnfolder]: For 137311/137329 co-relation queries the response was YES. [2022-11-02 21:08:36,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54674 conditions, 12284 events. 4564/12284 cut-off events. For 137311/137329 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 107536 event pairs, 1171 based on Foata normal form. 23/11770 useless extension candidates. Maximal degree in co-relation 54515. Up to 5044 conditions per place. [2022-11-02 21:08:36,163 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 751 selfloop transitions, 237 changer transitions 1/1060 dead transitions. [2022-11-02 21:08:36,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1060 transitions, 14648 flow [2022-11-02 21:08:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 21:08:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-02 21:08:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3223 transitions. [2022-11-02 21:08:36,171 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5368087941372418 [2022-11-02 21:08:36,171 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3223 transitions. [2022-11-02 21:08:36,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3223 transitions. [2022-11-02 21:08:36,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:36,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3223 transitions. [2022-11-02 21:08:36,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 84.8157894736842) internal successors, (3223), 38 states have internal predecessors, (3223), 0 states have call successors, (0), 0 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 21:08:36,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 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 21:08:36,190 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 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 21:08:36,190 INFO L175 Difference]: Start difference. First operand has 479 places, 641 transitions, 7061 flow. Second operand 38 states and 3223 transitions. [2022-11-02 21:08:36,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1060 transitions, 14648 flow [2022-11-02 21:08:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1060 transitions, 14221 flow, removed 142 selfloop flow, removed 10 redundant places. [2022-11-02 21:08:37,159 INFO L231 Difference]: Finished difference. Result has 530 places, 710 transitions, 8793 flow [2022-11-02 21:08:37,160 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=6716, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8793, PETRI_PLACES=530, PETRI_TRANSITIONS=710} [2022-11-02 21:08:37,161 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 388 predicate places. [2022-11-02 21:08:37,161 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 710 transitions, 8793 flow [2022-11-02 21:08:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:08:37,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:37,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:37,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:08:37,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1882222283, now seen corresponding path program 7 times [2022-11-02 21:08:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:37,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298888039] [2022-11-02 21:08:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:37,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,928 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 21:08:38,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298888039] [2022-11-02 21:08:38,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298888039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:38,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:38,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:08:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626875580] [2022-11-02 21:08:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:38,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:08:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:08:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:08:38,935 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:08:38,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 710 transitions, 8793 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:08:38,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:38,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:08:38,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:53,492 INFO L130 PetriNetUnfolder]: 5116/13436 cut-off events. [2022-11-02 21:08:53,492 INFO L131 PetriNetUnfolder]: For 193528/193546 co-relation queries the response was YES. [2022-11-02 21:08:53,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65679 conditions, 13436 events. 5116/13436 cut-off events. For 193528/193546 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 118423 event pairs, 1472 based on Foata normal form. 30/12904 useless extension candidates. Maximal degree in co-relation 65497. Up to 5629 conditions per place. [2022-11-02 21:08:53,978 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 801 selfloop transitions, 279 changer transitions 20/1171 dead transitions. [2022-11-02 21:08:53,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1171 transitions, 16291 flow [2022-11-02 21:08:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 21:08:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-02 21:08:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4435 transitions. [2022-11-02 21:08:53,987 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5398003894839338 [2022-11-02 21:08:53,987 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4435 transitions. [2022-11-02 21:08:53,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4435 transitions. [2022-11-02 21:08:53,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:53,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4435 transitions. [2022-11-02 21:08:54,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 85.28846153846153) internal successors, (4435), 52 states have internal predecessors, (4435), 0 states have call successors, (0), 0 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 21:08:54,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 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 21:08:54,151 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 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 21:08:54,151 INFO L175 Difference]: Start difference. First operand has 530 places, 710 transitions, 8793 flow. Second operand 52 states and 4435 transitions. [2022-11-02 21:08:54,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1171 transitions, 16291 flow [2022-11-02 21:08:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1171 transitions, 15573 flow, removed 265 selfloop flow, removed 10 redundant places. [2022-11-02 21:08:55,157 INFO L231 Difference]: Finished difference. Result has 602 places, 814 transitions, 10871 flow [2022-11-02 21:08:55,158 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10871, PETRI_PLACES=602, PETRI_TRANSITIONS=814} [2022-11-02 21:08:55,159 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 460 predicate places. [2022-11-02 21:08:55,159 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 814 transitions, 10871 flow [2022-11-02 21:08:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:08:55,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:55,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:08:55,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1550204511, now seen corresponding path program 8 times [2022-11-02 21:08:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740136078] [2022-11-02 21:08:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,204 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 21:08:57,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740136078] [2022-11-02 21:08:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740136078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:57,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:57,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:08:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085489231] [2022-11-02 21:08:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:57,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:08:57,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:08:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:08:57,209 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:08:57,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 814 transitions, 10871 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:08:57,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:57,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:08:57,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:10,155 INFO L130 PetriNetUnfolder]: 5537/14800 cut-off events. [2022-11-02 21:09:10,155 INFO L131 PetriNetUnfolder]: For 264512/264551 co-relation queries the response was YES. [2022-11-02 21:09:10,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75670 conditions, 14800 events. 5537/14800 cut-off events. For 264512/264551 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 135238 event pairs, 1023 based on Foata normal form. 35/14214 useless extension candidates. Maximal degree in co-relation 75457. Up to 6255 conditions per place. [2022-11-02 21:09:10,659 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 911 selfloop transitions, 278 changer transitions 4/1264 dead transitions. [2022-11-02 21:09:10,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 1264 transitions, 19649 flow [2022-11-02 21:09:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 21:09:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-02 21:09:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3144 transitions. [2022-11-02 21:09:10,666 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5378036264112214 [2022-11-02 21:09:10,667 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3144 transitions. [2022-11-02 21:09:10,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3144 transitions. [2022-11-02 21:09:10,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:10,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3144 transitions. [2022-11-02 21:09:10,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.97297297297297) internal successors, (3144), 37 states have internal predecessors, (3144), 0 states have call successors, (0), 0 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 21:09:10,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 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 21:09:10,684 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 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 21:09:10,684 INFO L175 Difference]: Start difference. First operand has 602 places, 814 transitions, 10871 flow. Second operand 37 states and 3144 transitions. [2022-11-02 21:09:10,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 1264 transitions, 19649 flow [2022-11-02 21:09:12,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1264 transitions, 19082 flow, removed 224 selfloop flow, removed 9 redundant places. [2022-11-02 21:09:12,399 INFO L231 Difference]: Finished difference. Result has 656 places, 891 transitions, 12943 flow [2022-11-02 21:09:12,401 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=10316, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=12943, PETRI_PLACES=656, PETRI_TRANSITIONS=891} [2022-11-02 21:09:12,401 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 514 predicate places. [2022-11-02 21:09:12,402 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 891 transitions, 12943 flow [2022-11-02 21:09:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:09:12,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:12,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 21:09:12,403 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:09:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -410028145, now seen corresponding path program 9 times [2022-11-02 21:09:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:12,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927077142] [2022-11-02 21:09:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:12,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:14,149 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 21:09:14,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:14,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927077142] [2022-11-02 21:09:14,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927077142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:14,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:14,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:09:14,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231006604] [2022-11-02 21:09:14,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:14,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:09:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:14,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:09:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:09:14,155 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:09:14,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 891 transitions, 12943 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:09:14,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:14,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:09:14,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:31,513 INFO L130 PetriNetUnfolder]: 6335/16651 cut-off events. [2022-11-02 21:09:31,513 INFO L131 PetriNetUnfolder]: For 380721/380743 co-relation queries the response was YES. [2022-11-02 21:09:32,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93606 conditions, 16651 events. 6335/16651 cut-off events. For 380721/380743 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 154229 event pairs, 1847 based on Foata normal form. 34/16016 useless extension candidates. Maximal degree in co-relation 93366. Up to 7571 conditions per place. [2022-11-02 21:09:32,246 INFO L137 encePairwiseOnDemand]: 125/158 looper letters, 973 selfloop transitions, 263 changer transitions 15/1322 dead transitions. [2022-11-02 21:09:32,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 1322 transitions, 22294 flow [2022-11-02 21:09:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 21:09:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-02 21:09:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3993 transitions. [2022-11-02 21:09:32,261 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5377053595475357 [2022-11-02 21:09:32,261 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3993 transitions. [2022-11-02 21:09:32,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3993 transitions. [2022-11-02 21:09:32,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:32,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3993 transitions. [2022-11-02 21:09:32,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 84.95744680851064) internal successors, (3993), 47 states have internal predecessors, (3993), 0 states have call successors, (0), 0 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 21:09:32,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 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 21:09:32,292 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 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 21:09:32,293 INFO L175 Difference]: Start difference. First operand has 656 places, 891 transitions, 12943 flow. Second operand 47 states and 3993 transitions. [2022-11-02 21:09:32,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 1322 transitions, 22294 flow [2022-11-02 21:09:35,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1322 transitions, 21400 flow, removed 402 selfloop flow, removed 8 redundant places. [2022-11-02 21:09:35,627 INFO L231 Difference]: Finished difference. Result has 727 places, 1021 transitions, 16494 flow [2022-11-02 21:09:35,628 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=12407, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=16494, PETRI_PLACES=727, PETRI_TRANSITIONS=1021} [2022-11-02 21:09:35,629 INFO L287 CegarLoopForPetriNet]: 142 programPoint places, 585 predicate places. [2022-11-02 21:09:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 727 places, 1021 transitions, 16494 flow [2022-11-02 21:09:35,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:09:35,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:35,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 21:09:35,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:09:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1694342367, now seen corresponding path program 10 times [2022-11-02 21:09:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:35,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547711846] [2022-11-02 21:09:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:37,290 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 21:09:37,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:37,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547711846] [2022-11-02 21:09:37,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547711846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:37,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:37,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-02 21:09:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908940259] [2022-11-02 21:09:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:37,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:09:37,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:09:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:09:37,295 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-02 21:09:37,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1021 transitions, 16494 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 21:09:37,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:37,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-02 21:09:37,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand