./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/rfi002_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-wmm/rfi002_tso.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48e6a57243e80a87d178da358ff4ad1dd63b86003507ef0dec3764d15038130a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:54:16,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:54:16,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:54:16,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:54:16,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:54:16,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:54:16,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:54:16,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:54:16,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:54:16,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:54:16,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:54:16,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:54:16,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:54:16,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:54:16,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:54:16,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:54:16,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:54:16,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:54:16,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:54:16,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:54:16,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:54:16,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:54:16,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:54:16,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:54:16,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:54:16,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:54:16,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:54:16,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:54:16,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:54:16,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:54:16,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:54:16,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:54:16,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:54:16,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:54:16,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:54:16,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:54:16,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:54:16,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:54:16,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:54:16,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:54:16,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:54:16,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:54:16,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:54:16,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:54:16,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:54:16,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:54:16,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:54:16,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:54:16,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:54:16,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:54:16,509 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:54:16,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:54:16,510 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:54:16,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:54:16,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:54:16,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:54:16,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:54:16,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:54:16,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:54:16,511 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:54:16,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:54:16,511 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:54:16,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:54:16,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:54:16,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:54:16,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:54:16,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:54:16,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:54:16,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:54:16,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:54:16,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:54:16,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:54:16,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:54:16,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:54:16,514 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:54:16,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:54:16,514 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:54:16,514 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48e6a57243e80a87d178da358ff4ad1dd63b86003507ef0dec3764d15038130a [2022-12-13 17:54:16,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:54:16,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:54:16,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:54:16,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:54:16,700 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:54:16,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-wmm/rfi002_tso.i [2022-12-13 17:54:19,281 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:54:19,476 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:54:19,477 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/sv-benchmarks/c/pthread-wmm/rfi002_tso.i [2022-12-13 17:54:19,489 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/data/e12788612/c8906e97fc3d4b989a72aaf0b87a5e72/FLAGb4ae3b7bb [2022-12-13 17:54:19,504 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/data/e12788612/c8906e97fc3d4b989a72aaf0b87a5e72 [2022-12-13 17:54:19,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:54:19,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:54:19,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:54:19,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:54:19,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:54:19,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b178d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19, skipping insertion in model container [2022-12-13 17:54:19,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:54:19,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:54:19,668 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/sv-benchmarks/c/pthread-wmm/rfi002_tso.i[987,1000] [2022-12-13 17:54:19,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,796 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,796 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,796 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,806 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,806 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,820 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,824 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,824 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,829 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:54:19,837 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:54:19,846 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/sv-benchmarks/c/pthread-wmm/rfi002_tso.i[987,1000] [2022-12-13 17:54:19,860 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,869 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,869 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,893 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,893 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:54:19,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:54:19,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:54:19,936 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:54:19,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19 WrapperNode [2022-12-13 17:54:19,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:54:19,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:54:19,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:54:19,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:54:19,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,983 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 203 [2022-12-13 17:54:19,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:54:19,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:54:19,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:54:19,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:54:19,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:19,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:20,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:20,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:20,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:20,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:20,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:54:20,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:54:20,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:54:20,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:54:20,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (1/1) ... [2022-12-13 17:54:20,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:54:20,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:20,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:54:20,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:54:20,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:54:20,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:54:20,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:54:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:54:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:54:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-12-13 17:54:20,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-12-13 17:54:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-12-13 17:54:20,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-12-13 17:54:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:54:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:54:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:54:20,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:54:20,091 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:54:20,209 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:54:20,211 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:54:20,552 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:54:20,708 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:54:20,708 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 17:54:20,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:54:20 BoogieIcfgContainer [2022-12-13 17:54:20,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:54:20,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:54:20,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:54:20,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:54:20,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:54:19" (1/3) ... [2022-12-13 17:54:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7038961c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:54:20, skipping insertion in model container [2022-12-13 17:54:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:54:19" (2/3) ... [2022-12-13 17:54:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7038961c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:54:20, skipping insertion in model container [2022-12-13 17:54:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:54:20" (3/3) ... [2022-12-13 17:54:20,718 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi002_tso.i [2022-12-13 17:54:20,725 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:54:20,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:54:20,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-12-13 17:54:20,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:54:20,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:54:20,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 114 transitions, 238 flow [2022-12-13 17:54:20,846 INFO L130 PetriNetUnfolder]: 2/112 cut-off events. [2022-12-13 17:54:20,846 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:54:20,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 112 events. 2/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2022-12-13 17:54:20,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 114 transitions, 238 flow [2022-12-13 17:54:20,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 112 transitions, 230 flow [2022-12-13 17:54:20,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:54:20,865 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 112 transitions, 230 flow [2022-12-13 17:54:20,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 112 transitions, 230 flow [2022-12-13 17:54:20,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 112 transitions, 230 flow [2022-12-13 17:54:20,886 INFO L130 PetriNetUnfolder]: 2/112 cut-off events. [2022-12-13 17:54:20,886 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:54:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 112 events. 2/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2022-12-13 17:54:20,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 1466 [2022-12-13 17:54:25,080 INFO L134 LiptonReduction]: Checked pairs total: 4394 [2022-12-13 17:54:25,080 INFO L136 LiptonReduction]: Total number of compositions: 103 [2022-12-13 17:54:25,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:54:25,097 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;@3e8f5bdb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:54:25,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:54:25,100 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 17:54:25,101 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:54:25,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:25,101 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:54:25,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash 611423780, now seen corresponding path program 1 times [2022-12-13 17:54:25,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:25,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403497616] [2022-12-13 17:54:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:25,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403497616] [2022-12-13 17:54:25,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403497616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:25,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:25,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:54:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435969] [2022-12-13 17:54:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:25,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:54:25,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:54:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:54:25,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 217 [2022-12-13 17:54:25,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:25,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 217 [2022-12-13 17:54:25,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:25,670 INFO L130 PetriNetUnfolder]: 373/626 cut-off events. [2022-12-13 17:54:25,671 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 17:54:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 626 events. 373/626 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2566 event pairs, 30 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 1260. Up to 554 conditions per place. [2022-12-13 17:54:25,674 INFO L137 encePairwiseOnDemand]: 214/217 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-12-13 17:54:25,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 122 flow [2022-12-13 17:54:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:54:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:54:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-12-13 17:54:25,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48847926267281105 [2022-12-13 17:54:25,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-12-13 17:54:25,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-12-13 17:54:25,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:25,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-12-13 17:54:25,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,695 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 318 transitions. [2022-12-13 17:54:25,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 122 flow [2022-12-13 17:54:25,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:25,698 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 48 flow [2022-12-13 17:54:25,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-12-13 17:54:25,702 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2022-12-13 17:54:25,702 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 48 flow [2022-12-13 17:54:25,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:25,702 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:54:25,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:54:25,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err1ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:25,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1774268527, now seen corresponding path program 1 times [2022-12-13 17:54:25,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146188106] [2022-12-13 17:54:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:25,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146188106] [2022-12-13 17:54:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146188106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:25,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:25,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:54:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134180897] [2022-12-13 17:54:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:54:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:54:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:54:25,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 217 [2022-12-13 17:54:25,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:25,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 217 [2022-12-13 17:54:25,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:25,984 INFO L130 PetriNetUnfolder]: 324/547 cut-off events. [2022-12-13 17:54:25,985 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-13 17:54:25,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1142 conditions, 547 events. 324/547 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2087 event pairs, 79 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1132. Up to 396 conditions per place. [2022-12-13 17:54:25,988 INFO L137 encePairwiseOnDemand]: 214/217 looper letters, 24 selfloop transitions, 2 changer transitions 2/28 dead transitions. [2022-12-13 17:54:25,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 28 transitions, 120 flow [2022-12-13 17:54:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:54:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:54:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-12-13 17:54:25,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4869431643625192 [2022-12-13 17:54:25,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-12-13 17:54:25,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-12-13 17:54:25,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:25,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-12-13 17:54:25,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,995 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 48 flow. Second operand 3 states and 317 transitions. [2022-12-13 17:54:25,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 28 transitions, 120 flow [2022-12-13 17:54:25,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:25,996 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 44 flow [2022-12-13 17:54:25,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2022-12-13 17:54:25,997 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2022-12-13 17:54:25,997 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 44 flow [2022-12-13 17:54:25,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:25,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:25,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:25,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:54:25,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash -832187254, now seen corresponding path program 1 times [2022-12-13 17:54:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098268742] [2022-12-13 17:54:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:26,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098268742] [2022-12-13 17:54:26,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098268742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:26,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:26,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:54:26,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044714827] [2022-12-13 17:54:26,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:54:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:54:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:54:26,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 217 [2022-12-13 17:54:26,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:26,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:26,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 217 [2022-12-13 17:54:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:26,713 INFO L130 PetriNetUnfolder]: 220/383 cut-off events. [2022-12-13 17:54:26,713 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 17:54:26,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 383 events. 220/383 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1293 event pairs, 92 based on Foata normal form. 18/401 useless extension candidates. Maximal degree in co-relation 792. Up to 243 conditions per place. [2022-12-13 17:54:26,715 INFO L137 encePairwiseOnDemand]: 214/217 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-13 17:54:26,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 108 flow [2022-12-13 17:54:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:54:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:54:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2022-12-13 17:54:26,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45468509984639016 [2022-12-13 17:54:26,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2022-12-13 17:54:26,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2022-12-13 17:54:26,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:26,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2022-12-13 17:54:26,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:26,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:26,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:26,719 INFO L175 Difference]: Start difference. First operand has 26 places, 18 transitions, 44 flow. Second operand 3 states and 296 transitions. [2022-12-13 17:54:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 108 flow [2022-12-13 17:54:26,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:26,719 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 48 flow [2022-12-13 17:54:26,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2022-12-13 17:54:26,720 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2022-12-13 17:54:26,720 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 48 flow [2022-12-13 17:54:26,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:26,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:26,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:26,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:54:26,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1362472427, now seen corresponding path program 1 times [2022-12-13 17:54:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933043190] [2022-12-13 17:54:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:26,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:27,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:27,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933043190] [2022-12-13 17:54:27,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933043190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:27,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:27,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:54:27,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563625149] [2022-12-13 17:54:27,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:27,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:54:27,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:54:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:27,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 217 [2022-12-13 17:54:27,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 48 flow. Second operand has 6 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:27,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:27,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 217 [2022-12-13 17:54:27,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:27,647 INFO L130 PetriNetUnfolder]: 202/356 cut-off events. [2022-12-13 17:54:27,648 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 17:54:27,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 356 events. 202/356 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1178 event pairs, 79 based on Foata normal form. 12/368 useless extension candidates. Maximal degree in co-relation 774. Up to 202 conditions per place. [2022-12-13 17:54:27,650 INFO L137 encePairwiseOnDemand]: 211/217 looper letters, 34 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-12-13 17:54:27,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 184 flow [2022-12-13 17:54:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:54:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:54:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2022-12-13 17:54:27,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44423963133640554 [2022-12-13 17:54:27,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2022-12-13 17:54:27,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2022-12-13 17:54:27,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:27,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2022-12-13 17:54:27,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:27,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:27,657 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:27,664 INFO L175 Difference]: Start difference. First operand has 26 places, 18 transitions, 48 flow. Second operand 5 states and 482 transitions. [2022-12-13 17:54:27,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 184 flow [2022-12-13 17:54:27,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:27,666 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 87 flow [2022-12-13 17:54:27,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2022-12-13 17:54:27,667 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2022-12-13 17:54:27,667 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 87 flow [2022-12-13 17:54:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:27,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:27,668 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:27,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:54:27,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash 507970109, now seen corresponding path program 1 times [2022-12-13 17:54:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256928037] [2022-12-13 17:54:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:27,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256928037] [2022-12-13 17:54:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256928037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:28,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:28,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:54:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504983094] [2022-12-13 17:54:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:28,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:54:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:54:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:54:28,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 217 [2022-12-13 17:54:28,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 87 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:28,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 217 [2022-12-13 17:54:28,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:28,970 INFO L130 PetriNetUnfolder]: 222/388 cut-off events. [2022-12-13 17:54:28,970 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:54:28,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 388 events. 222/388 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1344 event pairs, 17 based on Foata normal form. 2/390 useless extension candidates. Maximal degree in co-relation 992. Up to 231 conditions per place. [2022-12-13 17:54:28,972 INFO L137 encePairwiseOnDemand]: 208/217 looper letters, 47 selfloop transitions, 19 changer transitions 0/66 dead transitions. [2022-12-13 17:54:28,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 66 transitions, 354 flow [2022-12-13 17:54:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:54:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:54:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 860 transitions. [2022-12-13 17:54:28,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4403481822836662 [2022-12-13 17:54:28,974 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 860 transitions. [2022-12-13 17:54:28,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 860 transitions. [2022-12-13 17:54:28,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:28,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 860 transitions. [2022-12-13 17:54:28,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.55555555555556) internal successors, (860), 9 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,979 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,979 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 87 flow. Second operand 9 states and 860 transitions. [2022-12-13 17:54:28,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 66 transitions, 354 flow [2022-12-13 17:54:28,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 66 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:54:28,980 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 204 flow [2022-12-13 17:54:28,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=204, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2022-12-13 17:54:28,981 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2022-12-13 17:54:28,981 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 204 flow [2022-12-13 17:54:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:28,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:54:28,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2039749973, now seen corresponding path program 2 times [2022-12-13 17:54:28,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:28,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255810369] [2022-12-13 17:54:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255810369] [2022-12-13 17:54:29,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255810369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:29,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:29,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:54:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837226350] [2022-12-13 17:54:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:29,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:54:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:54:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:54:29,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 217 [2022-12-13 17:54:29,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 91.625) internal successors, (733), 8 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:29,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 217 [2022-12-13 17:54:29,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:29,888 INFO L130 PetriNetUnfolder]: 269/469 cut-off events. [2022-12-13 17:54:29,889 INFO L131 PetriNetUnfolder]: For 491/491 co-relation queries the response was YES. [2022-12-13 17:54:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 469 events. 269/469 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1769 event pairs, 30 based on Foata normal form. 3/472 useless extension candidates. Maximal degree in co-relation 1557. Up to 307 conditions per place. [2022-12-13 17:54:29,891 INFO L137 encePairwiseOnDemand]: 209/217 looper letters, 51 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2022-12-13 17:54:29,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 66 transitions, 472 flow [2022-12-13 17:54:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:54:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:54:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 491 transitions. [2022-12-13 17:54:29,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4525345622119816 [2022-12-13 17:54:29,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 491 transitions. [2022-12-13 17:54:29,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 491 transitions. [2022-12-13 17:54:29,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:29,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 491 transitions. [2022-12-13 17:54:29,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,895 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 204 flow. Second operand 5 states and 491 transitions. [2022-12-13 17:54:29,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 66 transitions, 472 flow [2022-12-13 17:54:29,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:54:29,898 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 311 flow [2022-12-13 17:54:29,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2022-12-13 17:54:29,899 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2022-12-13 17:54:29,899 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 311 flow [2022-12-13 17:54:29,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.625) internal successors, (733), 8 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:29,899 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:29,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:54:29,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1798063961, now seen corresponding path program 3 times [2022-12-13 17:54:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284100191] [2022-12-13 17:54:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:29,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:30,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:30,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284100191] [2022-12-13 17:54:30,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284100191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:30,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:30,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:54:30,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711836139] [2022-12-13 17:54:30,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:54:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:54:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:54:30,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 217 [2022-12-13 17:54:30,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:30,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 217 [2022-12-13 17:54:30,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:30,553 INFO L130 PetriNetUnfolder]: 294/509 cut-off events. [2022-12-13 17:54:30,553 INFO L131 PetriNetUnfolder]: For 818/818 co-relation queries the response was YES. [2022-12-13 17:54:30,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 509 events. 294/509 cut-off events. For 818/818 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1937 event pairs, 34 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1937. Up to 318 conditions per place. [2022-12-13 17:54:30,556 INFO L137 encePairwiseOnDemand]: 210/217 looper letters, 53 selfloop transitions, 18 changer transitions 0/71 dead transitions. [2022-12-13 17:54:30,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 582 flow [2022-12-13 17:54:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:54:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:54:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 502 transitions. [2022-12-13 17:54:30,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4626728110599078 [2022-12-13 17:54:30,557 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 502 transitions. [2022-12-13 17:54:30,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 502 transitions. [2022-12-13 17:54:30,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:30,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 502 transitions. [2022-12-13 17:54:30,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,559 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,559 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 311 flow. Second operand 5 states and 502 transitions. [2022-12-13 17:54:30,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 582 flow [2022-12-13 17:54:30,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 568 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 17:54:30,563 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 389 flow [2022-12-13 17:54:30,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2022-12-13 17:54:30,564 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2022-12-13 17:54:30,564 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 389 flow [2022-12-13 17:54:30,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:30,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:54:30,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash -923547385, now seen corresponding path program 4 times [2022-12-13 17:54:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:30,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113698944] [2022-12-13 17:54:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:31,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:31,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113698944] [2022-12-13 17:54:31,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113698944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:31,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:31,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:54:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730384043] [2022-12-13 17:54:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:54:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:54:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:54:31,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 217 [2022-12-13 17:54:31,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:31,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:31,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 217 [2022-12-13 17:54:31,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:31,280 INFO L130 PetriNetUnfolder]: 316/548 cut-off events. [2022-12-13 17:54:31,280 INFO L131 PetriNetUnfolder]: For 1268/1268 co-relation queries the response was YES. [2022-12-13 17:54:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 548 events. 316/548 cut-off events. For 1268/1268 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2167 event pairs, 37 based on Foata normal form. 4/552 useless extension candidates. Maximal degree in co-relation 2178. Up to 345 conditions per place. [2022-12-13 17:54:31,283 INFO L137 encePairwiseOnDemand]: 208/217 looper letters, 48 selfloop transitions, 30 changer transitions 0/78 dead transitions. [2022-12-13 17:54:31,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 78 transitions, 687 flow [2022-12-13 17:54:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:54:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:54:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 600 transitions. [2022-12-13 17:54:31,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4608294930875576 [2022-12-13 17:54:31,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 600 transitions. [2022-12-13 17:54:31,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 600 transitions. [2022-12-13 17:54:31,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:31,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 600 transitions. [2022-12-13 17:54:31,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:31,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:31,287 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:31,287 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 389 flow. Second operand 6 states and 600 transitions. [2022-12-13 17:54:31,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 78 transitions, 687 flow [2022-12-13 17:54:31,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 648 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 17:54:31,292 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 546 flow [2022-12-13 17:54:31,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2022-12-13 17:54:31,292 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2022-12-13 17:54:31,292 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 546 flow [2022-12-13 17:54:31,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:31,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:31,293 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:31,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:54:31,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 242211212, now seen corresponding path program 1 times [2022-12-13 17:54:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110235968] [2022-12-13 17:54:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110235968] [2022-12-13 17:54:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110235968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:32,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:32,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 17:54:32,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812826154] [2022-12-13 17:54:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:54:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:54:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:54:32,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 217 [2022-12-13 17:54:32,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 546 flow. Second operand has 9 states, 9 states have (on average 92.55555555555556) internal successors, (833), 9 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:32,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:32,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 217 [2022-12-13 17:54:32,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:32,705 INFO L130 PetriNetUnfolder]: 416/729 cut-off events. [2022-12-13 17:54:32,705 INFO L131 PetriNetUnfolder]: For 2401/2401 co-relation queries the response was YES. [2022-12-13 17:54:32,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3335 conditions, 729 events. 416/729 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3260 event pairs, 29 based on Foata normal form. 4/733 useless extension candidates. Maximal degree in co-relation 3308. Up to 410 conditions per place. [2022-12-13 17:54:32,711 INFO L137 encePairwiseOnDemand]: 208/217 looper letters, 74 selfloop transitions, 44 changer transitions 0/118 dead transitions. [2022-12-13 17:54:32,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 118 transitions, 1239 flow [2022-12-13 17:54:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:54:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:54:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 598 transitions. [2022-12-13 17:54:32,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4592933947772657 [2022-12-13 17:54:32,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 598 transitions. [2022-12-13 17:54:32,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 598 transitions. [2022-12-13 17:54:32,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:32,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 598 transitions. [2022-12-13 17:54:32,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:32,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:32,718 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:32,718 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 546 flow. Second operand 6 states and 598 transitions. [2022-12-13 17:54:32,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 118 transitions, 1239 flow [2022-12-13 17:54:32,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 1214 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-12-13 17:54:32,729 INFO L231 Difference]: Finished difference. Result has 61 places, 93 transitions, 1044 flow [2022-12-13 17:54:32,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=61, PETRI_TRANSITIONS=93} [2022-12-13 17:54:32,730 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 33 predicate places. [2022-12-13 17:54:32,730 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 93 transitions, 1044 flow [2022-12-13 17:54:32,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 92.55555555555556) internal successors, (833), 9 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:32,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:32,731 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:32,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:54:32,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1225868248, now seen corresponding path program 2 times [2022-12-13 17:54:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:32,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178360338] [2022-12-13 17:54:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:34,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178360338] [2022-12-13 17:54:34,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178360338] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:34,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:34,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 17:54:34,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977029285] [2022-12-13 17:54:34,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:34,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:54:34,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:54:34,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:54:35,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 217 [2022-12-13 17:54:35,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 93 transitions, 1044 flow. Second operand has 11 states, 11 states have (on average 83.27272727272727) internal successors, (916), 11 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:35,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:35,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 217 [2022-12-13 17:54:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:35,719 INFO L130 PetriNetUnfolder]: 433/769 cut-off events. [2022-12-13 17:54:35,719 INFO L131 PetriNetUnfolder]: For 3633/3633 co-relation queries the response was YES. [2022-12-13 17:54:35,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 769 events. 433/769 cut-off events. For 3633/3633 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3573 event pairs, 32 based on Foata normal form. 2/771 useless extension candidates. Maximal degree in co-relation 3963. Up to 530 conditions per place. [2022-12-13 17:54:35,723 INFO L137 encePairwiseOnDemand]: 208/217 looper letters, 110 selfloop transitions, 54 changer transitions 0/164 dead transitions. [2022-12-13 17:54:35,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 164 transitions, 1980 flow [2022-12-13 17:54:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:54:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:54:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 975 transitions. [2022-12-13 17:54:35,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4084625052366988 [2022-12-13 17:54:35,725 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 975 transitions. [2022-12-13 17:54:35,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 975 transitions. [2022-12-13 17:54:35,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:35,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 975 transitions. [2022-12-13 17:54:35,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.63636363636364) internal successors, (975), 11 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:35,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:35,729 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:35,729 INFO L175 Difference]: Start difference. First operand has 61 places, 93 transitions, 1044 flow. Second operand 11 states and 975 transitions. [2022-12-13 17:54:35,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 164 transitions, 1980 flow [2022-12-13 17:54:35,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 164 transitions, 1942 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 17:54:35,739 INFO L231 Difference]: Finished difference. Result has 73 places, 126 transitions, 1581 flow [2022-12-13 17:54:35,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1581, PETRI_PLACES=73, PETRI_TRANSITIONS=126} [2022-12-13 17:54:35,740 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2022-12-13 17:54:35,740 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 126 transitions, 1581 flow [2022-12-13 17:54:35,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 83.27272727272727) internal successors, (916), 11 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:35,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:35,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:35,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:54:35,741 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1225867938, now seen corresponding path program 1 times [2022-12-13 17:54:35,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:35,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105510089] [2022-12-13 17:54:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:35,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:36,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105510089] [2022-12-13 17:54:36,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105510089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:36,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:36,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:54:36,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496942796] [2022-12-13 17:54:36,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:36,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:54:36,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:54:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:36,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 217 [2022-12-13 17:54:36,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 126 transitions, 1581 flow. Second operand has 6 states, 6 states have (on average 95.33333333333333) internal successors, (572), 6 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:36,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:36,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 217 [2022-12-13 17:54:36,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:36,581 INFO L130 PetriNetUnfolder]: 444/790 cut-off events. [2022-12-13 17:54:36,582 INFO L131 PetriNetUnfolder]: For 4566/4566 co-relation queries the response was YES. [2022-12-13 17:54:36,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 790 events. 444/790 cut-off events. For 4566/4566 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3653 event pairs, 60 based on Foata normal form. 3/793 useless extension candidates. Maximal degree in co-relation 4554. Up to 558 conditions per place. [2022-12-13 17:54:36,586 INFO L137 encePairwiseOnDemand]: 208/217 looper letters, 103 selfloop transitions, 47 changer transitions 0/150 dead transitions. [2022-12-13 17:54:36,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 150 transitions, 2060 flow [2022-12-13 17:54:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:54:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:54:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 601 transitions. [2022-12-13 17:54:36,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46159754224270355 [2022-12-13 17:54:36,588 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 601 transitions. [2022-12-13 17:54:36,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 601 transitions. [2022-12-13 17:54:36,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:36,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 601 transitions. [2022-12-13 17:54:36,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.16666666666667) internal successors, (601), 6 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:36,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:36,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:36,590 INFO L175 Difference]: Start difference. First operand has 73 places, 126 transitions, 1581 flow. Second operand 6 states and 601 transitions. [2022-12-13 17:54:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 150 transitions, 2060 flow [2022-12-13 17:54:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 150 transitions, 2016 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-12-13 17:54:36,603 INFO L231 Difference]: Finished difference. Result has 79 places, 130 transitions, 1771 flow [2022-12-13 17:54:36,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1771, PETRI_PLACES=79, PETRI_TRANSITIONS=130} [2022-12-13 17:54:36,604 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2022-12-13 17:54:36,604 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 130 transitions, 1771 flow [2022-12-13 17:54:36,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.33333333333333) internal successors, (572), 6 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:36,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:36,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:36,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:54:36,605 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -831620428, now seen corresponding path program 3 times [2022-12-13 17:54:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618751106] [2022-12-13 17:54:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618751106] [2022-12-13 17:54:37,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618751106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:37,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:37,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 17:54:37,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794402726] [2022-12-13 17:54:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:37,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:54:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:54:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:54:37,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 217 [2022-12-13 17:54:37,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 130 transitions, 1771 flow. Second operand has 9 states, 9 states have (on average 89.55555555555556) internal successors, (806), 9 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:37,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:37,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 217 [2022-12-13 17:54:37,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:38,022 INFO L130 PetriNetUnfolder]: 445/793 cut-off events. [2022-12-13 17:54:38,022 INFO L131 PetriNetUnfolder]: For 5734/5734 co-relation queries the response was YES. [2022-12-13 17:54:38,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4893 conditions, 793 events. 445/793 cut-off events. For 5734/5734 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3697 event pairs, 59 based on Foata normal form. 2/795 useless extension candidates. Maximal degree in co-relation 4855. Up to 480 conditions per place. [2022-12-13 17:54:38,027 INFO L137 encePairwiseOnDemand]: 211/217 looper letters, 89 selfloop transitions, 57 changer transitions 0/146 dead transitions. [2022-12-13 17:54:38,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 146 transitions, 2156 flow [2022-12-13 17:54:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:54:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:54:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2022-12-13 17:54:38,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2022-12-13 17:54:38,029 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2022-12-13 17:54:38,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2022-12-13 17:54:38,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:38,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2022-12-13 17:54:38,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:38,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:38,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:38,031 INFO L175 Difference]: Start difference. First operand has 79 places, 130 transitions, 1771 flow. Second operand 6 states and 574 transitions. [2022-12-13 17:54:38,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 146 transitions, 2156 flow [2022-12-13 17:54:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 2141 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 17:54:38,044 INFO L231 Difference]: Finished difference. Result has 82 places, 132 transitions, 1962 flow [2022-12-13 17:54:38,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1962, PETRI_PLACES=82, PETRI_TRANSITIONS=132} [2022-12-13 17:54:38,045 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2022-12-13 17:54:38,045 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 132 transitions, 1962 flow [2022-12-13 17:54:38,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.55555555555556) internal successors, (806), 9 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:38,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:38,046 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:38,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:54:38,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 107699276, now seen corresponding path program 4 times [2022-12-13 17:54:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:38,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750375412] [2022-12-13 17:54:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:38,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:38,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:38,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750375412] [2022-12-13 17:54:38,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750375412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:38,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:38,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:54:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174989843] [2022-12-13 17:54:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:54:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:54:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:38,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 217 [2022-12-13 17:54:38,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 132 transitions, 1962 flow. Second operand has 6 states, 6 states have (on average 95.33333333333333) internal successors, (572), 6 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:38,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:38,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 217 [2022-12-13 17:54:38,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:39,119 INFO L130 PetriNetUnfolder]: 468/839 cut-off events. [2022-12-13 17:54:39,119 INFO L131 PetriNetUnfolder]: For 7140/7140 co-relation queries the response was YES. [2022-12-13 17:54:39,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5326 conditions, 839 events. 468/839 cut-off events. For 7140/7140 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3974 event pairs, 66 based on Foata normal form. 8/847 useless extension candidates. Maximal degree in co-relation 5287. Up to 547 conditions per place. [2022-12-13 17:54:39,123 INFO L137 encePairwiseOnDemand]: 210/217 looper letters, 94 selfloop transitions, 42 changer transitions 5/141 dead transitions. [2022-12-13 17:54:39,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 141 transitions, 2304 flow [2022-12-13 17:54:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:54:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:54:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 500 transitions. [2022-12-13 17:54:39,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4608294930875576 [2022-12-13 17:54:39,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 500 transitions. [2022-12-13 17:54:39,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 500 transitions. [2022-12-13 17:54:39,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:39,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 500 transitions. [2022-12-13 17:54:39,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,127 INFO L175 Difference]: Start difference. First operand has 82 places, 132 transitions, 1962 flow. Second operand 5 states and 500 transitions. [2022-12-13 17:54:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 141 transitions, 2304 flow [2022-12-13 17:54:39,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 141 transitions, 2241 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:54:39,139 INFO L231 Difference]: Finished difference. Result has 84 places, 130 transitions, 2049 flow [2022-12-13 17:54:39,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2049, PETRI_PLACES=84, PETRI_TRANSITIONS=130} [2022-12-13 17:54:39,140 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2022-12-13 17:54:39,140 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 130 transitions, 2049 flow [2022-12-13 17:54:39,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.33333333333333) internal successors, (572), 6 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:39,140 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:39,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:54:39,140 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:39,141 INFO L85 PathProgramCache]: Analyzing trace with hash -805639474, now seen corresponding path program 1 times [2022-12-13 17:54:39,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:39,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032874287] [2022-12-13 17:54:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:39,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:39,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032874287] [2022-12-13 17:54:39,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032874287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:39,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:39,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:54:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804401082] [2022-12-13 17:54:39,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:54:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:54:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:39,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 217 [2022-12-13 17:54:39,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 130 transitions, 2049 flow. Second operand has 6 states, 6 states have (on average 94.5) internal successors, (567), 6 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:39,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 217 [2022-12-13 17:54:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:39,757 INFO L130 PetriNetUnfolder]: 512/940 cut-off events. [2022-12-13 17:54:39,757 INFO L131 PetriNetUnfolder]: For 9901/9901 co-relation queries the response was YES. [2022-12-13 17:54:39,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5958 conditions, 940 events. 512/940 cut-off events. For 9901/9901 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4687 event pairs, 147 based on Foata normal form. 8/948 useless extension candidates. Maximal degree in co-relation 5918. Up to 568 conditions per place. [2022-12-13 17:54:39,761 INFO L137 encePairwiseOnDemand]: 210/217 looper letters, 105 selfloop transitions, 25 changer transitions 32/162 dead transitions. [2022-12-13 17:54:39,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 162 transitions, 2682 flow [2022-12-13 17:54:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:54:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:54:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2022-12-13 17:54:39,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4589861751152074 [2022-12-13 17:54:39,763 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 498 transitions. [2022-12-13 17:54:39,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 498 transitions. [2022-12-13 17:54:39,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:39,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 498 transitions. [2022-12-13 17:54:39,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,765 INFO L175 Difference]: Start difference. First operand has 84 places, 130 transitions, 2049 flow. Second operand 5 states and 498 transitions. [2022-12-13 17:54:39,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 162 transitions, 2682 flow [2022-12-13 17:54:39,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 162 transitions, 2633 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-13 17:54:39,780 INFO L231 Difference]: Finished difference. Result has 86 places, 113 transitions, 1700 flow [2022-12-13 17:54:39,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1700, PETRI_PLACES=86, PETRI_TRANSITIONS=113} [2022-12-13 17:54:39,780 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2022-12-13 17:54:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 113 transitions, 1700 flow [2022-12-13 17:54:39,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.5) internal successors, (567), 6 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:39,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:39,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:54:39,781 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash -328687600, now seen corresponding path program 2 times [2022-12-13 17:54:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:39,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974489586] [2022-12-13 17:54:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:40,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974489586] [2022-12-13 17:54:40,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974489586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:40,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:40,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:54:40,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61016844] [2022-12-13 17:54:40,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:54:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:54:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:54:40,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 217 [2022-12-13 17:54:40,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 1700 flow. Second operand has 8 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:40,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:40,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 217 [2022-12-13 17:54:40,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:40,682 INFO L130 PetriNetUnfolder]: 399/748 cut-off events. [2022-12-13 17:54:40,682 INFO L131 PetriNetUnfolder]: For 7188/7188 co-relation queries the response was YES. [2022-12-13 17:54:40,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4614 conditions, 748 events. 399/748 cut-off events. For 7188/7188 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3589 event pairs, 54 based on Foata normal form. 8/756 useless extension candidates. Maximal degree in co-relation 4574. Up to 396 conditions per place. [2022-12-13 17:54:40,686 INFO L137 encePairwiseOnDemand]: 209/217 looper letters, 100 selfloop transitions, 56 changer transitions 15/171 dead transitions. [2022-12-13 17:54:40,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 171 transitions, 2603 flow [2022-12-13 17:54:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:54:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:54:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 754 transitions. [2022-12-13 17:54:40,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.434331797235023 [2022-12-13 17:54:40,688 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 754 transitions. [2022-12-13 17:54:40,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 754 transitions. [2022-12-13 17:54:40,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:40,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 754 transitions. [2022-12-13 17:54:40,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.25) internal successors, (754), 8 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:40,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 217.0) internal successors, (1953), 9 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:40,693 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 217.0) internal successors, (1953), 9 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:40,693 INFO L175 Difference]: Start difference. First operand has 86 places, 113 transitions, 1700 flow. Second operand 8 states and 754 transitions. [2022-12-13 17:54:40,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 171 transitions, 2603 flow [2022-12-13 17:54:40,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 171 transitions, 2472 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-12-13 17:54:40,707 INFO L231 Difference]: Finished difference. Result has 88 places, 121 transitions, 1913 flow [2022-12-13 17:54:40,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1913, PETRI_PLACES=88, PETRI_TRANSITIONS=121} [2022-12-13 17:54:40,707 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2022-12-13 17:54:40,707 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 121 transitions, 1913 flow [2022-12-13 17:54:40,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:40,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:40,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 17:54:40,708 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1123832870, now seen corresponding path program 3 times [2022-12-13 17:54:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:40,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653634246] [2022-12-13 17:54:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:41,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:41,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653634246] [2022-12-13 17:54:41,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653634246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:41,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:41,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:54:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882778066] [2022-12-13 17:54:41,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:41,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:54:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:54:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:54:41,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 217 [2022-12-13 17:54:41,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 121 transitions, 1913 flow. Second operand has 10 states, 10 states have (on average 87.5) internal successors, (875), 10 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:41,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:41,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 217 [2022-12-13 17:54:41,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:42,449 INFO L130 PetriNetUnfolder]: 450/876 cut-off events. [2022-12-13 17:54:42,449 INFO L131 PetriNetUnfolder]: For 8718/8718 co-relation queries the response was YES. [2022-12-13 17:54:42,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5566 conditions, 876 events. 450/876 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4563 event pairs, 30 based on Foata normal form. 8/884 useless extension candidates. Maximal degree in co-relation 5527. Up to 269 conditions per place. [2022-12-13 17:54:42,453 INFO L137 encePairwiseOnDemand]: 206/217 looper letters, 122 selfloop transitions, 124 changer transitions 19/265 dead transitions. [2022-12-13 17:54:42,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 4145 flow [2022-12-13 17:54:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:54:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:54:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1228 transitions. [2022-12-13 17:54:42,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.435306628855016 [2022-12-13 17:54:42,456 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1228 transitions. [2022-12-13 17:54:42,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1228 transitions. [2022-12-13 17:54:42,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:42,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1228 transitions. [2022-12-13 17:54:42,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 94.46153846153847) internal successors, (1228), 13 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:42,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 217.0) internal successors, (3038), 14 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:42,460 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 217.0) internal successors, (3038), 14 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:42,460 INFO L175 Difference]: Start difference. First operand has 88 places, 121 transitions, 1913 flow. Second operand 13 states and 1228 transitions. [2022-12-13 17:54:42,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 4145 flow [2022-12-13 17:54:42,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 265 transitions, 3680 flow, removed 73 selfloop flow, removed 6 redundant places. [2022-12-13 17:54:42,478 INFO L231 Difference]: Finished difference. Result has 103 places, 193 transitions, 3143 flow [2022-12-13 17:54:42,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3143, PETRI_PLACES=103, PETRI_TRANSITIONS=193} [2022-12-13 17:54:42,478 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2022-12-13 17:54:42,478 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 193 transitions, 3143 flow [2022-12-13 17:54:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.5) internal successors, (875), 10 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:42,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:42,479 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:54:42,479 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1462780376, now seen corresponding path program 4 times [2022-12-13 17:54:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:42,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370017305] [2022-12-13 17:54:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:43,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370017305] [2022-12-13 17:54:43,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370017305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:43,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:43,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:54:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186047490] [2022-12-13 17:54:43,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:43,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:54:43,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:54:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:54:43,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 217 [2022-12-13 17:54:43,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 193 transitions, 3143 flow. Second operand has 10 states, 10 states have (on average 90.5) internal successors, (905), 10 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:43,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:43,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 217 [2022-12-13 17:54:43,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:43,554 INFO L130 PetriNetUnfolder]: 505/988 cut-off events. [2022-12-13 17:54:43,554 INFO L131 PetriNetUnfolder]: For 11458/11458 co-relation queries the response was YES. [2022-12-13 17:54:43,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6715 conditions, 988 events. 505/988 cut-off events. For 11458/11458 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5398 event pairs, 59 based on Foata normal form. 10/998 useless extension candidates. Maximal degree in co-relation 6668. Up to 431 conditions per place. [2022-12-13 17:54:43,559 INFO L137 encePairwiseOnDemand]: 209/217 looper letters, 199 selfloop transitions, 37 changer transitions 37/273 dead transitions. [2022-12-13 17:54:43,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 273 transitions, 4680 flow [2022-12-13 17:54:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:54:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:54:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 774 transitions. [2022-12-13 17:54:43,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44585253456221197 [2022-12-13 17:54:43,561 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 774 transitions. [2022-12-13 17:54:43,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 774 transitions. [2022-12-13 17:54:43,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:43,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 774 transitions. [2022-12-13 17:54:43,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.75) internal successors, (774), 8 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:43,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 217.0) internal successors, (1953), 9 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:43,563 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 217.0) internal successors, (1953), 9 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:43,563 INFO L175 Difference]: Start difference. First operand has 103 places, 193 transitions, 3143 flow. Second operand 8 states and 774 transitions. [2022-12-13 17:54:43,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 273 transitions, 4680 flow [2022-12-13 17:54:43,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 273 transitions, 4532 flow, removed 56 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:43,592 INFO L231 Difference]: Finished difference. Result has 111 places, 198 transitions, 3142 flow [2022-12-13 17:54:43,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3142, PETRI_PLACES=111, PETRI_TRANSITIONS=198} [2022-12-13 17:54:43,593 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 83 predicate places. [2022-12-13 17:54:43,593 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 198 transitions, 3142 flow [2022-12-13 17:54:43,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.5) internal successors, (905), 10 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:43,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:43,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:43,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 17:54:43,593 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1261487250, now seen corresponding path program 5 times [2022-12-13 17:54:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:43,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945365011] [2022-12-13 17:54:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:44,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945365011] [2022-12-13 17:54:44,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945365011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:44,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:44,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:54:44,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240816077] [2022-12-13 17:54:44,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:44,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:54:44,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:54:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:54:44,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 217 [2022-12-13 17:54:44,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 198 transitions, 3142 flow. Second operand has 8 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:44,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 217 [2022-12-13 17:54:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:44,596 INFO L130 PetriNetUnfolder]: 436/880 cut-off events. [2022-12-13 17:54:44,597 INFO L131 PetriNetUnfolder]: For 9382/9382 co-relation queries the response was YES. [2022-12-13 17:54:44,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 880 events. 436/880 cut-off events. For 9382/9382 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4789 event pairs, 45 based on Foata normal form. 6/886 useless extension candidates. Maximal degree in co-relation 5833. Up to 290 conditions per place. [2022-12-13 17:54:44,601 INFO L137 encePairwiseOnDemand]: 206/217 looper letters, 154 selfloop transitions, 105 changer transitions 12/271 dead transitions. [2022-12-13 17:54:44,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 271 transitions, 4378 flow [2022-12-13 17:54:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:54:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:54:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1059 transitions. [2022-12-13 17:54:44,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4436531210724759 [2022-12-13 17:54:44,603 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1059 transitions. [2022-12-13 17:54:44,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1059 transitions. [2022-12-13 17:54:44,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:44,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1059 transitions. [2022-12-13 17:54:44,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 96.27272727272727) internal successors, (1059), 11 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,607 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,607 INFO L175 Difference]: Start difference. First operand has 111 places, 198 transitions, 3142 flow. Second operand 11 states and 1059 transitions. [2022-12-13 17:54:44,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 271 transitions, 4378 flow [2022-12-13 17:54:44,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 271 transitions, 4310 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 17:54:44,635 INFO L231 Difference]: Finished difference. Result has 122 places, 214 transitions, 3605 flow [2022-12-13 17:54:44,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=3088, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3605, PETRI_PLACES=122, PETRI_TRANSITIONS=214} [2022-12-13 17:54:44,635 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2022-12-13 17:54:44,636 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 214 transitions, 3605 flow [2022-12-13 17:54:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:44,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:44,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 17:54:44,636 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash 530767500, now seen corresponding path program 6 times [2022-12-13 17:54:44,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:44,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097986822] [2022-12-13 17:54:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:44,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:45,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097986822] [2022-12-13 17:54:45,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097986822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:45,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:45,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 17:54:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773428914] [2022-12-13 17:54:45,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:54:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:54:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:54:45,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 217 [2022-12-13 17:54:45,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 214 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 89.66666666666667) internal successors, (807), 9 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:45,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:45,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 217 [2022-12-13 17:54:45,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:45,866 INFO L130 PetriNetUnfolder]: 406/831 cut-off events. [2022-12-13 17:54:45,866 INFO L131 PetriNetUnfolder]: For 10203/10203 co-relation queries the response was YES. [2022-12-13 17:54:45,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 831 events. 406/831 cut-off events. For 10203/10203 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4538 event pairs, 41 based on Foata normal form. 6/837 useless extension candidates. Maximal degree in co-relation 5790. Up to 266 conditions per place. [2022-12-13 17:54:45,871 INFO L137 encePairwiseOnDemand]: 206/217 looper letters, 148 selfloop transitions, 116 changer transitions 12/276 dead transitions. [2022-12-13 17:54:45,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 276 transitions, 4710 flow [2022-12-13 17:54:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:54:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:54:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1242 transitions. [2022-12-13 17:54:45,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4402694080113435 [2022-12-13 17:54:45,873 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1242 transitions. [2022-12-13 17:54:45,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1242 transitions. [2022-12-13 17:54:45,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:45,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1242 transitions. [2022-12-13 17:54:45,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.53846153846153) internal successors, (1242), 13 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:45,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 217.0) internal successors, (3038), 14 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:45,876 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 217.0) internal successors, (3038), 14 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:45,876 INFO L175 Difference]: Start difference. First operand has 122 places, 214 transitions, 3605 flow. Second operand 13 states and 1242 transitions. [2022-12-13 17:54:45,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 276 transitions, 4710 flow [2022-12-13 17:54:45,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 276 transitions, 4595 flow, removed 15 selfloop flow, removed 4 redundant places. [2022-12-13 17:54:45,911 INFO L231 Difference]: Finished difference. Result has 132 places, 219 transitions, 3848 flow [2022-12-13 17:54:45,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3848, PETRI_PLACES=132, PETRI_TRANSITIONS=219} [2022-12-13 17:54:45,911 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 104 predicate places. [2022-12-13 17:54:45,911 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 219 transitions, 3848 flow [2022-12-13 17:54:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.66666666666667) internal successors, (807), 9 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:45,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:45,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 17:54:45,912 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1754802168, now seen corresponding path program 7 times [2022-12-13 17:54:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250614409] [2022-12-13 17:54:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:46,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:46,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250614409] [2022-12-13 17:54:46,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250614409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:46,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:46,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:54:46,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680469386] [2022-12-13 17:54:46,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:46,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:54:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:46,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:54:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:54:47,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 217 [2022-12-13 17:54:47,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 219 transitions, 3848 flow. Second operand has 10 states, 10 states have (on average 83.5) internal successors, (835), 10 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:47,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 217 [2022-12-13 17:54:47,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:47,659 INFO L130 PetriNetUnfolder]: 432/883 cut-off events. [2022-12-13 17:54:47,659 INFO L131 PetriNetUnfolder]: For 11775/11775 co-relation queries the response was YES. [2022-12-13 17:54:47,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6284 conditions, 883 events. 432/883 cut-off events. For 11775/11775 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4886 event pairs, 44 based on Foata normal form. 16/899 useless extension candidates. Maximal degree in co-relation 6230. Up to 567 conditions per place. [2022-12-13 17:54:47,664 INFO L137 encePairwiseOnDemand]: 206/217 looper letters, 151 selfloop transitions, 124 changer transitions 23/298 dead transitions. [2022-12-13 17:54:47,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 298 transitions, 5306 flow [2022-12-13 17:54:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:54:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:54:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1071 transitions. [2022-12-13 17:54:47,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2022-12-13 17:54:47,666 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1071 transitions. [2022-12-13 17:54:47,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1071 transitions. [2022-12-13 17:54:47,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:47,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1071 transitions. [2022-12-13 17:54:47,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 89.25) internal successors, (1071), 12 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 217.0) internal successors, (2821), 13 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,669 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 217.0) internal successors, (2821), 13 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,669 INFO L175 Difference]: Start difference. First operand has 132 places, 219 transitions, 3848 flow. Second operand 12 states and 1071 transitions. [2022-12-13 17:54:47,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 298 transitions, 5306 flow [2022-12-13 17:54:47,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 298 transitions, 5058 flow, removed 12 selfloop flow, removed 10 redundant places. [2022-12-13 17:54:47,703 INFO L231 Difference]: Finished difference. Result has 139 places, 258 transitions, 4592 flow [2022-12-13 17:54:47,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4592, PETRI_PLACES=139, PETRI_TRANSITIONS=258} [2022-12-13 17:54:47,703 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 111 predicate places. [2022-12-13 17:54:47,704 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 258 transitions, 4592 flow [2022-12-13 17:54:47,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.5) internal successors, (835), 10 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:47,704 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:47,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 17:54:47,704 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1668110358, now seen corresponding path program 8 times [2022-12-13 17:54:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418193182] [2022-12-13 17:54:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:48,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:48,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418193182] [2022-12-13 17:54:48,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418193182] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:48,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:48,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:54:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707201022] [2022-12-13 17:54:48,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:48,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:54:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:54:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:54:48,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 217 [2022-12-13 17:54:48,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 258 transitions, 4592 flow. Second operand has 8 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:48,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:48,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 217 [2022-12-13 17:54:48,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:48,812 INFO L130 PetriNetUnfolder]: 402/829 cut-off events. [2022-12-13 17:54:48,812 INFO L131 PetriNetUnfolder]: For 12099/12099 co-relation queries the response was YES. [2022-12-13 17:54:48,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6327 conditions, 829 events. 402/829 cut-off events. For 12099/12099 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4572 event pairs, 64 based on Foata normal form. 16/845 useless extension candidates. Maximal degree in co-relation 6268. Up to 427 conditions per place. [2022-12-13 17:54:48,816 INFO L137 encePairwiseOnDemand]: 209/217 looper letters, 149 selfloop transitions, 115 changer transitions 36/300 dead transitions. [2022-12-13 17:54:48,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 300 transitions, 5712 flow [2022-12-13 17:54:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:54:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:54:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 851 transitions. [2022-12-13 17:54:48,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43573988735279057 [2022-12-13 17:54:48,818 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 851 transitions. [2022-12-13 17:54:48,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 851 transitions. [2022-12-13 17:54:48,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:48,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 851 transitions. [2022-12-13 17:54:48,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.55555555555556) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:48,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:48,820 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:48,820 INFO L175 Difference]: Start difference. First operand has 139 places, 258 transitions, 4592 flow. Second operand 9 states and 851 transitions. [2022-12-13 17:54:48,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 300 transitions, 5712 flow [2022-12-13 17:54:48,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 300 transitions, 5587 flow, removed 36 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:48,869 INFO L231 Difference]: Finished difference. Result has 148 places, 246 transitions, 4598 flow [2022-12-13 17:54:48,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4598, PETRI_PLACES=148, PETRI_TRANSITIONS=246} [2022-12-13 17:54:48,869 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 120 predicate places. [2022-12-13 17:54:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 246 transitions, 4598 flow [2022-12-13 17:54:48,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:48,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:48,870 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:48,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 17:54:48,870 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:48,870 INFO L85 PathProgramCache]: Analyzing trace with hash 224934914, now seen corresponding path program 9 times [2022-12-13 17:54:48,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:48,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802858659] [2022-12-13 17:54:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:48,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:49,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802858659] [2022-12-13 17:54:49,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802858659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:49,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:49,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:54:49,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324879105] [2022-12-13 17:54:49,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:49,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:54:49,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:54:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:49,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 217 [2022-12-13 17:54:49,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 246 transitions, 4598 flow. Second operand has 6 states, 6 states have (on average 93.5) internal successors, (561), 6 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:49,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:49,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 217 [2022-12-13 17:54:49,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:49,511 INFO L130 PetriNetUnfolder]: 321/671 cut-off events. [2022-12-13 17:54:49,512 INFO L131 PetriNetUnfolder]: For 10321/10321 co-relation queries the response was YES. [2022-12-13 17:54:49,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 671 events. 321/671 cut-off events. For 10321/10321 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3564 event pairs, 52 based on Foata normal form. 6/677 useless extension candidates. Maximal degree in co-relation 5413. Up to 454 conditions per place. [2022-12-13 17:54:49,516 INFO L137 encePairwiseOnDemand]: 210/217 looper letters, 196 selfloop transitions, 56 changer transitions 10/262 dead transitions. [2022-12-13 17:54:49,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 262 transitions, 5248 flow [2022-12-13 17:54:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:54:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:54:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2022-12-13 17:54:49,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4476629361421988 [2022-12-13 17:54:49,517 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2022-12-13 17:54:49,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2022-12-13 17:54:49,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:49,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2022-12-13 17:54:49,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:49,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 217.0) internal successors, (1736), 8 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:49,519 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 217.0) internal successors, (1736), 8 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:49,519 INFO L175 Difference]: Start difference. First operand has 148 places, 246 transitions, 4598 flow. Second operand 7 states and 680 transitions. [2022-12-13 17:54:49,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 262 transitions, 5248 flow [2022-12-13 17:54:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 262 transitions, 4968 flow, removed 44 selfloop flow, removed 8 redundant places. [2022-12-13 17:54:49,565 INFO L231 Difference]: Finished difference. Result has 145 places, 239 transitions, 4373 flow [2022-12-13 17:54:49,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4373, PETRI_PLACES=145, PETRI_TRANSITIONS=239} [2022-12-13 17:54:49,565 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 117 predicate places. [2022-12-13 17:54:49,565 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 239 transitions, 4373 flow [2022-12-13 17:54:49,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 93.5) internal successors, (561), 6 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:49,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:49,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 17:54:49,566 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2125436339, now seen corresponding path program 1 times [2022-12-13 17:54:49,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:49,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379453302] [2022-12-13 17:54:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:50,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379453302] [2022-12-13 17:54:50,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379453302] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:50,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:50,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:54:50,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131072768] [2022-12-13 17:54:50,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:50,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:54:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:54:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:54:50,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 217 [2022-12-13 17:54:50,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 239 transitions, 4373 flow. Second operand has 7 states, 7 states have (on average 93.28571428571429) internal successors, (653), 7 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:50,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:50,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 217 [2022-12-13 17:54:50,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:50,544 INFO L130 PetriNetUnfolder]: 332/696 cut-off events. [2022-12-13 17:54:50,545 INFO L131 PetriNetUnfolder]: For 9834/9834 co-relation queries the response was YES. [2022-12-13 17:54:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5509 conditions, 696 events. 332/696 cut-off events. For 9834/9834 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3712 event pairs, 44 based on Foata normal form. 8/704 useless extension candidates. Maximal degree in co-relation 5449. Up to 321 conditions per place. [2022-12-13 17:54:50,548 INFO L137 encePairwiseOnDemand]: 210/217 looper letters, 147 selfloop transitions, 73 changer transitions 42/262 dead transitions. [2022-12-13 17:54:50,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 262 transitions, 5103 flow [2022-12-13 17:54:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:54:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:54:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 588 transitions. [2022-12-13 17:54:50,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2022-12-13 17:54:50,550 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 588 transitions. [2022-12-13 17:54:50,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 588 transitions. [2022-12-13 17:54:50,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:50,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 588 transitions. [2022-12-13 17:54:50,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 98.0) internal successors, (588), 6 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:50,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:50,552 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:50,552 INFO L175 Difference]: Start difference. First operand has 145 places, 239 transitions, 4373 flow. Second operand 6 states and 588 transitions. [2022-12-13 17:54:50,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 262 transitions, 5103 flow [2022-12-13 17:54:50,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 262 transitions, 4806 flow, removed 23 selfloop flow, removed 9 redundant places. [2022-12-13 17:54:50,589 INFO L231 Difference]: Finished difference. Result has 142 places, 209 transitions, 3729 flow [2022-12-13 17:54:50,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3729, PETRI_PLACES=142, PETRI_TRANSITIONS=209} [2022-12-13 17:54:50,589 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2022-12-13 17:54:50,590 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 209 transitions, 3729 flow [2022-12-13 17:54:50,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.28571428571429) internal successors, (653), 7 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:50,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:50,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 17:54:50,590 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:50,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1869807489, now seen corresponding path program 2 times [2022-12-13 17:54:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:50,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094003110] [2022-12-13 17:54:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:50,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:51,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:51,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094003110] [2022-12-13 17:54:51,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094003110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:51,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:51,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:54:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550916915] [2022-12-13 17:54:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:54:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:54:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:54:51,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 217 [2022-12-13 17:54:51,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 209 transitions, 3729 flow. Second operand has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:51,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:51,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 217 [2022-12-13 17:54:51,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:51,451 INFO L130 PetriNetUnfolder]: 285/603 cut-off events. [2022-12-13 17:54:51,451 INFO L131 PetriNetUnfolder]: For 8186/8186 co-relation queries the response was YES. [2022-12-13 17:54:51,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4819 conditions, 603 events. 285/603 cut-off events. For 8186/8186 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3069 event pairs, 22 based on Foata normal form. 12/615 useless extension candidates. Maximal degree in co-relation 4760. Up to 282 conditions per place. [2022-12-13 17:54:51,455 INFO L137 encePairwiseOnDemand]: 209/217 looper letters, 136 selfloop transitions, 73 changer transitions 39/248 dead transitions. [2022-12-13 17:54:51,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 248 transitions, 4669 flow [2022-12-13 17:54:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:54:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:54:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 766 transitions. [2022-12-13 17:54:51,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4412442396313364 [2022-12-13 17:54:51,457 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 766 transitions. [2022-12-13 17:54:51,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 766 transitions. [2022-12-13 17:54:51,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:51,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 766 transitions. [2022-12-13 17:54:51,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.75) internal successors, (766), 8 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:51,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 217.0) internal successors, (1953), 9 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:51,459 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 217.0) internal successors, (1953), 9 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:51,459 INFO L175 Difference]: Start difference. First operand has 142 places, 209 transitions, 3729 flow. Second operand 8 states and 766 transitions. [2022-12-13 17:54:51,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 248 transitions, 4669 flow [2022-12-13 17:54:51,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 248 transitions, 4299 flow, removed 24 selfloop flow, removed 14 redundant places. [2022-12-13 17:54:51,487 INFO L231 Difference]: Finished difference. Result has 131 places, 192 transitions, 3308 flow [2022-12-13 17:54:51,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3308, PETRI_PLACES=131, PETRI_TRANSITIONS=192} [2022-12-13 17:54:51,487 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 103 predicate places. [2022-12-13 17:54:51,487 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 192 transitions, 3308 flow [2022-12-13 17:54:51,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:51,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:51,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:51,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 17:54:51,487 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -816587259, now seen corresponding path program 3 times [2022-12-13 17:54:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:51,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103062483] [2022-12-13 17:54:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:52,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103062483] [2022-12-13 17:54:52,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103062483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:52,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:52,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:54:52,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401942432] [2022-12-13 17:54:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:54:52,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:54:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:54:52,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 217 [2022-12-13 17:54:52,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 192 transitions, 3308 flow. Second operand has 10 states, 10 states have (on average 90.6) internal successors, (906), 10 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:52,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:52,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 217 [2022-12-13 17:54:52,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:52,699 INFO L130 PetriNetUnfolder]: 247/527 cut-off events. [2022-12-13 17:54:52,699 INFO L131 PetriNetUnfolder]: For 6189/6189 co-relation queries the response was YES. [2022-12-13 17:54:52,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4134 conditions, 527 events. 247/527 cut-off events. For 6189/6189 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2614 event pairs, 33 based on Foata normal form. 8/535 useless extension candidates. Maximal degree in co-relation 4078. Up to 276 conditions per place. [2022-12-13 17:54:52,702 INFO L137 encePairwiseOnDemand]: 208/217 looper letters, 148 selfloop transitions, 57 changer transitions 26/231 dead transitions. [2022-12-13 17:54:52,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 231 transitions, 4155 flow [2022-12-13 17:54:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:54:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:54:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 860 transitions. [2022-12-13 17:54:52,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4403481822836662 [2022-12-13 17:54:52,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 860 transitions. [2022-12-13 17:54:52,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 860 transitions. [2022-12-13 17:54:52,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:52,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 860 transitions. [2022-12-13 17:54:52,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.55555555555556) internal successors, (860), 9 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:52,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:52,706 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:52,706 INFO L175 Difference]: Start difference. First operand has 131 places, 192 transitions, 3308 flow. Second operand 9 states and 860 transitions. [2022-12-13 17:54:52,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 231 transitions, 4155 flow [2022-12-13 17:54:52,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 231 transitions, 3854 flow, removed 33 selfloop flow, removed 11 redundant places. [2022-12-13 17:54:52,732 INFO L231 Difference]: Finished difference. Result has 131 places, 183 transitions, 3031 flow [2022-12-13 17:54:52,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3031, PETRI_PLACES=131, PETRI_TRANSITIONS=183} [2022-12-13 17:54:52,732 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 103 predicate places. [2022-12-13 17:54:52,733 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 183 transitions, 3031 flow [2022-12-13 17:54:52,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.6) internal successors, (906), 10 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:52,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:52,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 17:54:52,733 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:54:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1861596513, now seen corresponding path program 4 times [2022-12-13 17:54:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:52,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171379369] [2022-12-13 17:54:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:53,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:53,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171379369] [2022-12-13 17:54:53,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171379369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:53,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:53,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 17:54:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667061836] [2022-12-13 17:54:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:54:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:54:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:54:53,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 217 [2022-12-13 17:54:53,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 183 transitions, 3031 flow. Second operand has 9 states, 9 states have (on average 86.77777777777777) internal successors, (781), 9 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:53,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:53,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 217 [2022-12-13 17:54:53,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:54,398 INFO L130 PetriNetUnfolder]: 206/442 cut-off events. [2022-12-13 17:54:54,398 INFO L131 PetriNetUnfolder]: For 4964/4964 co-relation queries the response was YES. [2022-12-13 17:54:54,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 442 events. 206/442 cut-off events. For 4964/4964 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2102 event pairs, 8 based on Foata normal form. 8/450 useless extension candidates. Maximal degree in co-relation 3398. Up to 164 conditions per place. [2022-12-13 17:54:54,399 INFO L137 encePairwiseOnDemand]: 209/217 looper letters, 0 selfloop transitions, 0 changer transitions 204/204 dead transitions. [2022-12-13 17:54:54,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 204 transitions, 3623 flow [2022-12-13 17:54:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:54:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:54:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 808 transitions. [2022-12-13 17:54:54,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41372247823860725 [2022-12-13 17:54:54,401 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 808 transitions. [2022-12-13 17:54:54,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 808 transitions. [2022-12-13 17:54:54,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:54,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 808 transitions. [2022-12-13 17:54:54,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:54,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:54,403 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:54,403 INFO L175 Difference]: Start difference. First operand has 131 places, 183 transitions, 3031 flow. Second operand 9 states and 808 transitions. [2022-12-13 17:54:54,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 204 transitions, 3623 flow [2022-12-13 17:54:54,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 204 transitions, 3412 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-12-13 17:54:54,422 INFO L231 Difference]: Finished difference. Result has 127 places, 0 transitions, 0 flow [2022-12-13 17:54:54,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=127, PETRI_TRANSITIONS=0} [2022-12-13 17:54:54,422 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2022-12-13 17:54:54,422 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 0 transitions, 0 flow [2022-12-13 17:54:54,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 86.77777777777777) internal successors, (781), 9 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:54,424 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-12-13 17:54:54,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 17:54:54,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 17:54:54,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-12-13 17:54:54,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-12-13 17:54:54,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 17:54:54,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 17:54:54,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 17:54:54,425 INFO L445 BasicCegarLoop]: Path program histogram: [9, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 17:54:54,428 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 17:54:54,428 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 17:54:54,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 05:54:54 BasicIcfg [2022-12-13 17:54:54,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 17:54:54,431 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 17:54:54,431 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 17:54:54,431 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 17:54:54,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:54:20" (3/4) ... [2022-12-13 17:54:54,433 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 17:54:54,436 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-12-13 17:54:54,436 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-12-13 17:54:54,439 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2022-12-13 17:54:54,439 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-12-13 17:54:54,439 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 17:54:54,439 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 17:54:54,461 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 17:54:54,462 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 17:54:54,462 INFO L158 Benchmark]: Toolchain (without parser) took 34954.48ms. Allocated memory was 136.3MB in the beginning and 413.1MB in the end (delta: 276.8MB). Free memory was 91.4MB in the beginning and 316.5MB in the end (delta: -225.1MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,462 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory was 44.4MB in the beginning and 44.3MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:54:54,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.10ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 91.0MB in the beginning and 128.8MB in the end (delta: -37.8MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,463 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.03ms. Allocated memory is still 163.6MB. Free memory was 128.8MB in the beginning and 125.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,463 INFO L158 Benchmark]: Boogie Preprocessor took 35.20ms. Allocated memory is still 163.6MB. Free memory was 125.8MB in the beginning and 122.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,463 INFO L158 Benchmark]: RCFGBuilder took 690.74ms. Allocated memory is still 163.6MB. Free memory was 122.7MB in the beginning and 125.6MB in the end (delta: -2.9MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,463 INFO L158 Benchmark]: TraceAbstraction took 33718.05ms. Allocated memory was 163.6MB in the beginning and 413.1MB in the end (delta: 249.6MB). Free memory was 124.5MB in the beginning and 319.7MB in the end (delta: -195.1MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,463 INFO L158 Benchmark]: Witness Printer took 30.74ms. Allocated memory is still 413.1MB. Free memory was 319.7MB in the beginning and 316.5MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 17:54:54,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory was 44.4MB in the beginning and 44.3MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.10ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 91.0MB in the beginning and 128.8MB in the end (delta: -37.8MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.03ms. Allocated memory is still 163.6MB. Free memory was 128.8MB in the beginning and 125.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.20ms. Allocated memory is still 163.6MB. Free memory was 125.8MB in the beginning and 122.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 690.74ms. Allocated memory is still 163.6MB. Free memory was 122.7MB in the beginning and 125.6MB in the end (delta: -2.9MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. * TraceAbstraction took 33718.05ms. Allocated memory was 163.6MB in the beginning and 413.1MB in the end (delta: 249.6MB). Free memory was 124.5MB in the beginning and 319.7MB in the end (delta: -195.1MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. * Witness Printer took 30.74ms. Allocated memory is still 413.1MB. Free memory was 319.7MB in the beginning and 316.5MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 117 PlacesBefore, 28 PlacesAfterwards, 112 TransitionsBefore, 21 TransitionsAfterwards, 1466 CoEnabledTransitionPairs, 7 FixpointIterations, 53 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 103 TotalNumberOfCompositions, 4394 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1491, independent: 1301, independent conditional: 0, independent unconditional: 1301, dependent: 190, dependent conditional: 0, dependent unconditional: 190, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 772, independent: 730, independent conditional: 0, independent unconditional: 730, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1491, independent: 571, independent conditional: 0, independent unconditional: 571, dependent: 148, dependent conditional: 0, dependent unconditional: 148, unknown: 772, unknown conditional: 0, unknown unconditional: 772] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 136 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.6s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 11.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2034 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1725 mSDsluCounter, 1862 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1762 mSDsCounter, 978 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4225 IncrementalHoareTripleChecker+Invalid, 5203 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 978 mSolverCounterUnsat, 100 mSDtfsCounter, 4225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4598occurred in iteration=21, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 323 ConstructedInterpolants, 0 QuantifiedInterpolants, 6727 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 17:54:54,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d974b9fe-6b07-4675-b004-42f89da9ba34/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE