./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 15:41:06,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:41:06,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:41:06,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:41:06,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:41:06,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:41:06,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:41:06,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:41:06,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:41:06,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:41:06,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:41:06,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:41:06,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:41:06,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:41:06,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:41:06,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:41:06,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:41:06,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:41:06,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:41:06,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:41:06,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:41:06,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:41:06,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:41:06,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:41:06,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:41:06,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:41:06,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:41:06,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:41:06,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:41:06,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:41:06,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:41:06,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:41:06,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:41:06,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:41:06,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:41:06,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:41:06,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:41:06,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:41:06,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:41:06,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:41:06,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:41:06,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:41:06,829 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:41:06,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:41:06,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:41:06,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:41:06,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:41:06,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:41:06,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:41:06,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:41:06,832 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:41:06,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:41:06,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:41:06,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:41:06,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:41:06,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:41:06,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:41:06,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:41:06,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:41:06,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:41:06,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:41:06,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:41:06,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:41:06,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:41:06,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:41:06,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:41:06,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:41:06,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:41:06,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:41:06,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:41:06,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:41:06,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:41:06,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:41:06,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:41:06,839 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:41:06,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:41:06,840 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_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-11-25 15:41:07,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:41:07,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:41:07,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:41:07,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:41:07,206 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:41:07,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-25 15:41:10,242 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:41:10,498 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:41:10,498 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-25 15:41:10,505 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/data/c28691181/d6ff40c8f70c461aa03934bb8f6d248b/FLAG40dad8f8e [2022-11-25 15:41:10,521 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/data/c28691181/d6ff40c8f70c461aa03934bb8f6d248b [2022-11-25 15:41:10,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:41:10,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:41:10,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:41:10,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:41:10,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:41:10,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5f3760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10, skipping insertion in model container [2022-11-25 15:41:10,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:41:10,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:41:10,734 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,744 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,760 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,760 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,766 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,772 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,774 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,803 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_c4b7d962-5d63-440b-ba75-e9561c6450ba/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-25 15:41:10,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:41:10,835 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:41:10,849 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,852 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,852 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,853 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,853 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,854 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,855 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,855 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,856 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,857 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:10,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:10,866 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_c4b7d962-5d63-440b-ba75-e9561c6450ba/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-25 15:41:10,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:41:10,887 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:41:10,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10 WrapperNode [2022-11-25 15:41:10,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:41:10,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:41:10,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:41:10,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:41:10,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,936 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2022-11-25 15:41:10,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:41:10,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:41:10,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:41:10,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:41:10,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:41:10,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:41:10,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:41:10,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:41:10,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (1/1) ... [2022-11-25 15:41:10,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:41:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:11,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:41:11,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:41:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:41:11,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:41:11,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:41:11,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:41:11,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:41:11,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:41:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:41:11,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 15:41:11,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 15:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 15:41:11,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 15:41:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:41:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:41:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:41:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:41:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:41:11,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:41:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:41:11,096 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:41:11,278 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:41:11,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:41:11,880 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:41:12,139 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:41:12,146 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 15:41:12,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:41:12 BoogieIcfgContainer [2022-11-25 15:41:12,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:41:12,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:41:12,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:41:12,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:41:12,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:41:10" (1/3) ... [2022-11-25 15:41:12,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7843de54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:41:12, skipping insertion in model container [2022-11-25 15:41:12,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:10" (2/3) ... [2022-11-25 15:41:12,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7843de54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:41:12, skipping insertion in model container [2022-11-25 15:41:12,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:41:12" (3/3) ... [2022-11-25 15:41:12,171 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-11-25 15:41:12,182 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:41:12,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:41:12,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:41:12,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:41:12,302 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 15:41:12,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2022-11-25 15:41:12,460 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2022-11-25 15:41:12,460 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 15:41:12,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2022-11-25 15:41:12,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2022-11-25 15:41:12,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 189 transitions, 402 flow [2022-11-25 15:41:12,489 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:41:12,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 189 transitions, 402 flow [2022-11-25 15:41:12,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 189 transitions, 402 flow [2022-11-25 15:41:12,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 189 transitions, 402 flow [2022-11-25 15:41:12,601 INFO L130 PetriNetUnfolder]: 15/189 cut-off events. [2022-11-25 15:41:12,605 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 15:41:12,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 189 events. 15/189 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2022-11-25 15:41:12,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2022-11-25 15:41:23,251 INFO L134 LiptonReduction]: Checked pairs total: 4253 [2022-11-25 15:41:23,252 INFO L136 LiptonReduction]: Total number of compositions: 194 [2022-11-25 15:41:23,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:41:23,276 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;@4ac97d51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:41:23,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 15:41:23,284 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2022-11-25 15:41:23,284 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 15:41:23,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:23,285 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:23,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash -715702285, now seen corresponding path program 1 times [2022-11-25 15:41:23,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:23,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433068251] [2022-11-25 15:41:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:23,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:23,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433068251] [2022-11-25 15:41:23,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433068251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:23,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:23,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:41:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112203609] [2022-11-25 15:41:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:23,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:41:23,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:41:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:41:24,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2022-11-25 15:41:24,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:24,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2022-11-25 15:41:24,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:24,586 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2022-11-25 15:41:24,586 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-11-25 15:41:24,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9179 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2022-11-25 15:41:24,612 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2022-11-25 15:41:24,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2022-11-25 15:41:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:41:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:41:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-25 15:41:24,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48583333333333334 [2022-11-25 15:41:24,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-25 15:41:24,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-25 15:41:24,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:24,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-25 15:41:24,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,668 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 583 transitions. [2022-11-25 15:41:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2022-11-25 15:41:24,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 15:41:24,681 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2022-11-25 15:41:24,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2022-11-25 15:41:24,687 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-11-25 15:41:24,688 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2022-11-25 15:41:24,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:24,689 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:24,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:41:24,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2146020880, now seen corresponding path program 1 times [2022-11-25 15:41:24,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:24,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301735932] [2022-11-25 15:41:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:25,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301735932] [2022-11-25 15:41:25,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301735932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:25,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:25,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:41:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634594006] [2022-11-25 15:41:25,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:25,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2022-11-25 15:41:25,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:25,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:25,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2022-11-25 15:41:25,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:25,835 INFO L130 PetriNetUnfolder]: 4054/5355 cut-off events. [2022-11-25 15:41:25,836 INFO L131 PetriNetUnfolder]: For 981/981 co-relation queries the response was YES. [2022-11-25 15:41:25,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 5355 events. 4054/5355 cut-off events. For 981/981 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21695 event pairs, 826 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 2443. Up to 2128 conditions per place. [2022-11-25 15:41:25,868 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 83 selfloop transitions, 8 changer transitions 1/92 dead transitions. [2022-11-25 15:41:25,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 92 transitions, 455 flow [2022-11-25 15:41:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2022-11-25 15:41:25,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.488125 [2022-11-25 15:41:25,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2022-11-25 15:41:25,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2022-11-25 15:41:25,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:25,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2022-11-25 15:41:25,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 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) [2022-11-25 15:41:25,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:25,880 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:25,880 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 781 transitions. [2022-11-25 15:41:25,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 92 transitions, 455 flow [2022-11-25 15:41:25,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 92 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:41:25,883 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 158 flow [2022-11-25 15:41:25,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2022-11-25 15:41:25,884 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2022-11-25 15:41:25,884 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 158 flow [2022-11-25 15:41:25,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:25,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:25,886 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:25,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:41:25,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1884040465, now seen corresponding path program 1 times [2022-11-25 15:41:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102084611] [2022-11-25 15:41:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:25,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102084611] [2022-11-25 15:41:26,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102084611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:26,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:26,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:41:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940235994] [2022-11-25 15:41:26,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:26,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:26,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:26,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2022-11-25 15:41:26,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:26,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:26,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2022-11-25 15:41:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:27,290 INFO L130 PetriNetUnfolder]: 4795/6436 cut-off events. [2022-11-25 15:41:27,291 INFO L131 PetriNetUnfolder]: For 4647/4647 co-relation queries the response was YES. [2022-11-25 15:41:27,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17256 conditions, 6436 events. 4795/6436 cut-off events. For 4647/4647 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26423 event pairs, 2813 based on Foata normal form. 248/6684 useless extension candidates. Maximal degree in co-relation 8677. Up to 5356 conditions per place. [2022-11-25 15:41:27,329 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 41 selfloop transitions, 2 changer transitions 28/71 dead transitions. [2022-11-25 15:41:27,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 392 flow [2022-11-25 15:41:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 746 transitions. [2022-11-25 15:41:27,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46625 [2022-11-25 15:41:27,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 746 transitions. [2022-11-25 15:41:27,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 746 transitions. [2022-11-25 15:41:27,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:27,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 746 transitions. [2022-11-25 15:41:27,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,340 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,340 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 158 flow. Second operand 4 states and 746 transitions. [2022-11-25 15:41:27,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 392 flow [2022-11-25 15:41:27,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:41:27,360 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 178 flow [2022-11-25 15:41:27,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-11-25 15:41:27,363 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2022-11-25 15:41:27,364 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 178 flow [2022-11-25 15:41:27,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:27,365 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:27,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:41:27,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2077921077, now seen corresponding path program 1 times [2022-11-25 15:41:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:27,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192174028] [2022-11-25 15:41:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:41:27,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192174028] [2022-11-25 15:41:27,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192174028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:27,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:27,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:41:27,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888398174] [2022-11-25 15:41:27,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:27,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:27,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:27,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:27,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2022-11-25 15:41:27,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:27,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2022-11-25 15:41:27,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:28,822 INFO L130 PetriNetUnfolder]: 5996/7910 cut-off events. [2022-11-25 15:41:28,823 INFO L131 PetriNetUnfolder]: For 4534/4534 co-relation queries the response was YES. [2022-11-25 15:41:28,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21695 conditions, 7910 events. 5996/7910 cut-off events. For 4534/4534 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33442 event pairs, 1126 based on Foata normal form. 1/7911 useless extension candidates. Maximal degree in co-relation 21679. Up to 4734 conditions per place. [2022-11-25 15:41:28,883 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 86 selfloop transitions, 13 changer transitions 5/104 dead transitions. [2022-11-25 15:41:28,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 104 transitions, 594 flow [2022-11-25 15:41:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2022-11-25 15:41:28,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.488125 [2022-11-25 15:41:28,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2022-11-25 15:41:28,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2022-11-25 15:41:28,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:28,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2022-11-25 15:41:28,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 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) [2022-11-25 15:41:28,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:28,895 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:28,896 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 178 flow. Second operand 4 states and 781 transitions. [2022-11-25 15:41:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 104 transitions, 594 flow [2022-11-25 15:41:28,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 104 transitions, 578 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:28,921 INFO L231 Difference]: Finished difference. Result has 47 places, 54 transitions, 294 flow [2022-11-25 15:41:28,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=54} [2022-11-25 15:41:28,923 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2022-11-25 15:41:28,924 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 54 transitions, 294 flow [2022-11-25 15:41:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:28,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:28,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:28,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:41:28,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 661040970, now seen corresponding path program 1 times [2022-11-25 15:41:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:28,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127011212] [2022-11-25 15:41:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:29,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:29,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127011212] [2022-11-25 15:41:29,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127011212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:29,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731810478] [2022-11-25 15:41:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:29,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:29,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:29,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:41:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:29,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:41:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:29,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:30,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731810478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:30,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:30,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-25 15:41:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045997873] [2022-11-25 15:41:30,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:30,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:41:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:41:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:41:30,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2022-11-25 15:41:30,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 294 flow. Second operand has 15 states, 15 states have (on average 172.4) internal successors, (2586), 15 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:30,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:30,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2022-11-25 15:41:30,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:31,861 INFO L130 PetriNetUnfolder]: 6113/8118 cut-off events. [2022-11-25 15:41:31,862 INFO L131 PetriNetUnfolder]: For 10726/10726 co-relation queries the response was YES. [2022-11-25 15:41:31,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24248 conditions, 8118 events. 6113/8118 cut-off events. For 10726/10726 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 34061 event pairs, 3372 based on Foata normal form. 132/8250 useless extension candidates. Maximal degree in co-relation 23784. Up to 7907 conditions per place. [2022-11-25 15:41:31,918 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 49 selfloop transitions, 6 changer transitions 20/75 dead transitions. [2022-11-25 15:41:31,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 508 flow [2022-11-25 15:41:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1059 transitions. [2022-11-25 15:41:31,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44125 [2022-11-25 15:41:31,922 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1059 transitions. [2022-11-25 15:41:31,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1059 transitions. [2022-11-25 15:41:31,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:31,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1059 transitions. [2022-11-25 15:41:31,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.5) internal successors, (1059), 6 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) [2022-11-25 15:41:31,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:31,931 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:31,932 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 294 flow. Second operand 6 states and 1059 transitions. [2022-11-25 15:41:31,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 508 flow [2022-11-25 15:41:31,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 504 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 15:41:31,955 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 320 flow [2022-11-25 15:41:31,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2022-11-25 15:41:31,958 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 15 predicate places. [2022-11-25 15:41:31,958 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 320 flow [2022-11-25 15:41:31,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 172.4) internal successors, (2586), 15 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:31,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:31,962 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:31,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:41:32,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:32,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:32,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1947829358, now seen corresponding path program 2 times [2022-11-25 15:41:32,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:32,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668064079] [2022-11-25 15:41:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:32,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:33,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668064079] [2022-11-25 15:41:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668064079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:33,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216910359] [2022-11-25 15:41:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:41:33,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:33,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:33,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:33,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:41:33,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:41:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 15:41:33,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:33,860 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 15:41:33,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-25 15:41:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:34,368 INFO L321 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-11-25 15:41:34,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-25 15:41:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:34,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216910359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:34,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:34,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2022-11-25 15:41:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456315810] [2022-11-25 15:41:34,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:34,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:41:34,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:34,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:41:34,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:41:35,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 400 [2022-11-25 15:41:35,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 320 flow. Second operand has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:35,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:35,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 400 [2022-11-25 15:41:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:39,374 INFO L130 PetriNetUnfolder]: 12623/16638 cut-off events. [2022-11-25 15:41:39,374 INFO L131 PetriNetUnfolder]: For 16027/16027 co-relation queries the response was YES. [2022-11-25 15:41:39,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49212 conditions, 16638 events. 12623/16638 cut-off events. For 16027/16027 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 78493 event pairs, 367 based on Foata normal form. 4/16642 useless extension candidates. Maximal degree in co-relation 49174. Up to 9812 conditions per place. [2022-11-25 15:41:39,492 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 273 selfloop transitions, 216 changer transitions 35/524 dead transitions. [2022-11-25 15:41:39,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 524 transitions, 3141 flow [2022-11-25 15:41:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 15:41:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 15:41:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5305 transitions. [2022-11-25 15:41:39,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.414453125 [2022-11-25 15:41:39,508 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5305 transitions. [2022-11-25 15:41:39,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5305 transitions. [2022-11-25 15:41:39,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:39,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5305 transitions. [2022-11-25 15:41:39,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 165.78125) internal successors, (5305), 32 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:39,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 400.0) internal successors, (13200), 33 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:39,548 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 400.0) internal successors, (13200), 33 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:39,549 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 320 flow. Second operand 32 states and 5305 transitions. [2022-11-25 15:41:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 524 transitions, 3141 flow [2022-11-25 15:41:39,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 524 transitions, 3122 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 15:41:39,584 INFO L231 Difference]: Finished difference. Result has 88 places, 272 transitions, 2113 flow [2022-11-25 15:41:39,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2113, PETRI_PLACES=88, PETRI_TRANSITIONS=272} [2022-11-25 15:41:39,587 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 49 predicate places. [2022-11-25 15:41:39,587 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 272 transitions, 2113 flow [2022-11-25 15:41:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:39,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:39,590 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:39,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:39,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:39,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2138607924, now seen corresponding path program 1 times [2022-11-25 15:41:39,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:39,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218791115] [2022-11-25 15:41:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:39,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:41,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:41,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218791115] [2022-11-25 15:41:41,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218791115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:41,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294352773] [2022-11-25 15:41:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:41,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:41,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:41,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:41,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:41:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 15:41:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:41:41,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:41:41,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:41:41,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 15:41:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:41:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:42,162 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~i2~0 1)) (.cse0 (+ c_~s2~0 c_~t12~0))) (and (forall ((v_~i1~0_205 Int) (v_ArrVal_303 (Array Int Int))) (or (<= .cse0 (+ c_~s1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_303) c_~x~0.base) (+ c_~x~0.offset (* v_~i1~0_205 4))))) (<= (+ v_~i1~0_205 1) c_~i2~0) (<= .cse1 v_~i1~0_205))) (forall ((v_~i1~0_205 Int) (v_ArrVal_303 (Array Int Int))) (or (<= (+ v_~i1~0_205 1) c_~i2~0) (<= .cse1 v_~i1~0_205) (<= (+ c_~s1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_303) c_~x~0.base) (+ c_~x~0.offset (* v_~i1~0_205 4)))) .cse0))))) is different from false [2022-11-25 15:41:42,194 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 15:41:42,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 34 [2022-11-25 15:41:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:41:42,217 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 15:41:42,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-11-25 15:41:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294352773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:42,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:42,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2022-11-25 15:41:42,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184378094] [2022-11-25 15:41:42,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:42,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:41:42,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:42,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:41:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=317, Unknown=1, NotChecked=36, Total=420 [2022-11-25 15:41:42,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 400 [2022-11-25 15:41:42,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 272 transitions, 2113 flow. Second operand has 21 states, 21 states have (on average 143.14285714285714) internal successors, (3006), 21 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:42,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:42,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 400 [2022-11-25 15:41:42,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:45,675 INFO L130 PetriNetUnfolder]: 13498/17788 cut-off events. [2022-11-25 15:41:45,676 INFO L131 PetriNetUnfolder]: For 36616/36616 co-relation queries the response was YES. [2022-11-25 15:41:45,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66740 conditions, 17788 events. 13498/17788 cut-off events. For 36616/36616 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 84087 event pairs, 1468 based on Foata normal form. 1/17789 useless extension candidates. Maximal degree in co-relation 66696. Up to 15314 conditions per place. [2022-11-25 15:41:45,988 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 303 selfloop transitions, 142 changer transitions 14/459 dead transitions. [2022-11-25 15:41:45,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 459 transitions, 4149 flow [2022-11-25 15:41:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:41:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:41:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1840 transitions. [2022-11-25 15:41:45,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2022-11-25 15:41:45,995 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1840 transitions. [2022-11-25 15:41:45,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1840 transitions. [2022-11-25 15:41:45,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:45,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1840 transitions. [2022-11-25 15:41:46,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:46,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:46,010 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:46,015 INFO L175 Difference]: Start difference. First operand has 88 places, 272 transitions, 2113 flow. Second operand 12 states and 1840 transitions. [2022-11-25 15:41:46,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 459 transitions, 4149 flow [2022-11-25 15:41:46,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 459 transitions, 3864 flow, removed 140 selfloop flow, removed 3 redundant places. [2022-11-25 15:41:46,236 INFO L231 Difference]: Finished difference. Result has 103 places, 354 transitions, 3012 flow [2022-11-25 15:41:46,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3012, PETRI_PLACES=103, PETRI_TRANSITIONS=354} [2022-11-25 15:41:46,237 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 64 predicate places. [2022-11-25 15:41:46,237 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 354 transitions, 3012 flow [2022-11-25 15:41:46,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 143.14285714285714) internal successors, (3006), 21 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:46,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:46,256 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:46,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:46,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:41:46,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1385043616, now seen corresponding path program 2 times [2022-11-25 15:41:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:46,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255222007] [2022-11-25 15:41:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:47,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255222007] [2022-11-25 15:41:47,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255222007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:47,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857687845] [2022-11-25 15:41:47,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:41:47,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:47,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:47,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:41:47,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:41:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 15:41:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:47,890 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 15:41:47,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 15:41:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:48,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:48,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857687845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:48,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:48,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2022-11-25 15:41:48,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981719220] [2022-11-25 15:41:48,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:48,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:41:48,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:48,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:41:48,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:41:49,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 400 [2022-11-25 15:41:49,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 354 transitions, 3012 flow. Second operand has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:49,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:49,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 400 [2022-11-25 15:41:49,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:54,686 INFO L130 PetriNetUnfolder]: 20581/27122 cut-off events. [2022-11-25 15:41:54,686 INFO L131 PetriNetUnfolder]: For 65497/65497 co-relation queries the response was YES. [2022-11-25 15:41:54,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103491 conditions, 27122 events. 20581/27122 cut-off events. For 65497/65497 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 136653 event pairs, 1529 based on Foata normal form. 4/27126 useless extension candidates. Maximal degree in co-relation 103439. Up to 18473 conditions per place. [2022-11-25 15:41:55,274 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 444 selfloop transitions, 344 changer transitions 52/840 dead transitions. [2022-11-25 15:41:55,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 840 transitions, 7428 flow [2022-11-25 15:41:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 15:41:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 15:41:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4846 transitions. [2022-11-25 15:41:55,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4177586206896552 [2022-11-25 15:41:55,289 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4846 transitions. [2022-11-25 15:41:55,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4846 transitions. [2022-11-25 15:41:55,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:55,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4846 transitions. [2022-11-25 15:41:55,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 167.10344827586206) internal successors, (4846), 29 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:55,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 400.0) internal successors, (12000), 30 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:55,324 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 400.0) internal successors, (12000), 30 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:55,325 INFO L175 Difference]: Start difference. First operand has 103 places, 354 transitions, 3012 flow. Second operand 29 states and 4846 transitions. [2022-11-25 15:41:55,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 840 transitions, 7428 flow [2022-11-25 15:41:55,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 840 transitions, 7293 flow, removed 27 selfloop flow, removed 3 redundant places. [2022-11-25 15:41:55,879 INFO L231 Difference]: Finished difference. Result has 139 places, 575 transitions, 5936 flow [2022-11-25 15:41:55,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5936, PETRI_PLACES=139, PETRI_TRANSITIONS=575} [2022-11-25 15:41:55,879 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2022-11-25 15:41:55,880 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 575 transitions, 5936 flow [2022-11-25 15:41:55,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:55,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:55,881 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:55,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:56,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:56,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:41:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash -52006832, now seen corresponding path program 3 times [2022-11-25 15:41:56,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532890098] [2022-11-25 15:41:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:56,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:56,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532890098] [2022-11-25 15:41:56,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532890098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:56,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362105615] [2022-11-25 15:41:56,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:41:56,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:56,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:56,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:41:57,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:41:57,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 15:41:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:57,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:41:57,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:41:57,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:41:57,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:41:57,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:41:57,809 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 15:41:57,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-25 15:41:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:57,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:41:58,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362105615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:58,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:58,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 6] total 23 [2022-11-25 15:41:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354923909] [2022-11-25 15:41:58,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:58,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:41:58,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:41:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:41:59,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 400 [2022-11-25 15:41:59,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 575 transitions, 5936 flow. Second operand has 24 states, 24 states have (on average 146.41666666666666) internal successors, (3514), 24 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:59,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:59,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 400 [2022-11-25 15:41:59,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:07,868 INFO L130 PetriNetUnfolder]: 25227/33229 cut-off events. [2022-11-25 15:42:07,868 INFO L131 PetriNetUnfolder]: For 143794/143794 co-relation queries the response was YES. [2022-11-25 15:42:08,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149178 conditions, 33229 events. 25227/33229 cut-off events. For 143794/143794 co-relation queries the response was YES. Maximal size of possible extension queue 1262. Compared 172244 event pairs, 2243 based on Foata normal form. 4/33233 useless extension candidates. Maximal degree in co-relation 149113. Up to 25638 conditions per place. [2022-11-25 15:42:08,223 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 609 selfloop transitions, 364 changer transitions 31/1004 dead transitions. [2022-11-25 15:42:08,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 1004 transitions, 10958 flow [2022-11-25 15:42:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 15:42:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 15:42:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4705 transitions. [2022-11-25 15:42:08,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39208333333333334 [2022-11-25 15:42:08,241 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4705 transitions. [2022-11-25 15:42:08,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4705 transitions. [2022-11-25 15:42:08,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:08,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4705 transitions. [2022-11-25 15:42:08,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 156.83333333333334) internal successors, (4705), 30 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:08,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 400.0) internal successors, (12400), 31 states have internal predecessors, (12400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:08,286 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 400.0) internal successors, (12400), 31 states have internal predecessors, (12400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:08,286 INFO L175 Difference]: Start difference. First operand has 139 places, 575 transitions, 5936 flow. Second operand 30 states and 4705 transitions. [2022-11-25 15:42:08,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 1004 transitions, 10958 flow [2022-11-25 15:42:10,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 1004 transitions, 10328 flow, removed 302 selfloop flow, removed 6 redundant places. [2022-11-25 15:42:10,274 INFO L231 Difference]: Finished difference. Result has 174 places, 762 transitions, 8464 flow [2022-11-25 15:42:10,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8464, PETRI_PLACES=174, PETRI_TRANSITIONS=762} [2022-11-25 15:42:10,275 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 135 predicate places. [2022-11-25 15:42:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 762 transitions, 8464 flow [2022-11-25 15:42:10,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 146.41666666666666) internal successors, (3514), 24 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:10,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:10,277 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:10,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 15:42:10,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:10,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:42:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1598950034, now seen corresponding path program 1 times [2022-11-25 15:42:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:10,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995188258] [2022-11-25 15:42:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:10,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:42:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995188258] [2022-11-25 15:42:11,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995188258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615295486] [2022-11-25 15:42:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:11,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:11,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:42:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 15:42:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:42:11,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:42:11,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-11-25 15:42:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:11,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:12,086 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 15:42:12,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 15:42:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:42:12,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615295486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:12,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:12,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2022-11-25 15:42:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527103031] [2022-11-25 15:42:12,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:12,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:42:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:42:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:42:12,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 400 [2022-11-25 15:42:12,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 762 transitions, 8464 flow. Second operand has 21 states, 21 states have (on average 156.9047619047619) internal successors, (3295), 21 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:12,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 400 [2022-11-25 15:42:12,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:30,967 INFO L130 PetriNetUnfolder]: 56853/74928 cut-off events. [2022-11-25 15:42:30,967 INFO L131 PetriNetUnfolder]: For 407936/407936 co-relation queries the response was YES. [2022-11-25 15:42:31,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357243 conditions, 74928 events. 56853/74928 cut-off events. For 407936/407936 co-relation queries the response was YES. Maximal size of possible extension queue 2762. Compared 430560 event pairs, 6400 based on Foata normal form. 225/75153 useless extension candidates. Maximal degree in co-relation 353508. Up to 33137 conditions per place. [2022-11-25 15:42:31,848 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 1510 selfloop transitions, 515 changer transitions 85/2110 dead transitions. [2022-11-25 15:42:31,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 2110 transitions, 25144 flow [2022-11-25 15:42:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 15:42:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-25 15:42:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6754 transitions. [2022-11-25 15:42:31,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.422125 [2022-11-25 15:42:31,861 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6754 transitions. [2022-11-25 15:42:31,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6754 transitions. [2022-11-25 15:42:31,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:31,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6754 transitions. [2022-11-25 15:42:31,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 168.85) internal successors, (6754), 40 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:31,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 400.0) internal successors, (16400), 41 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:31,897 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 400.0) internal successors, (16400), 41 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:31,897 INFO L175 Difference]: Start difference. First operand has 174 places, 762 transitions, 8464 flow. Second operand 40 states and 6754 transitions. [2022-11-25 15:42:31,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 2110 transitions, 25144 flow [2022-11-25 15:42:41,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 2110 transitions, 24065 flow, removed 512 selfloop flow, removed 7 redundant places. [2022-11-25 15:42:41,117 INFO L231 Difference]: Finished difference. Result has 215 places, 1153 transitions, 14655 flow [2022-11-25 15:42:41,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=7930, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=14655, PETRI_PLACES=215, PETRI_TRANSITIONS=1153} [2022-11-25 15:42:41,118 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 176 predicate places. [2022-11-25 15:42:41,118 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 1153 transitions, 14655 flow [2022-11-25 15:42:41,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 156.9047619047619) internal successors, (3295), 21 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:41,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:41,119 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:41,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:41,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:42:41,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:42:41,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash -914908824, now seen corresponding path program 2 times [2022-11-25 15:42:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:41,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559951880] [2022-11-25 15:42:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:42:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:41,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559951880] [2022-11-25 15:42:41,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559951880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169726918] [2022-11-25 15:42:41,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:42:41,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:41,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:41,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b7d962-5d63-440b-ba75-e9561c6450ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:42:42,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:42:42,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-25 15:42:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:42,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:42:42,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:42:42,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:42:42,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:42:42,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:42:42,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:42:42,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-25 15:42:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:42,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:42:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169726918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:43,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:43,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 6] total 21 [2022-11-25 15:42:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647329174] [2022-11-25 15:42:43,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:43,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:42:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:42:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-11-25 15:42:44,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 400 [2022-11-25 15:42:44,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 1153 transitions, 14655 flow. Second operand has 22 states, 22 states have (on average 146.04545454545453) internal successors, (3213), 22 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:44,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:44,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 400 [2022-11-25 15:42:44,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand