./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:41:52,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:41:52,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:41:52,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:41:52,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:41:52,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:41:52,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:41:52,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:41:52,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:41:52,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:41:52,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:41:52,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:41:52,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:41:52,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:41:52,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:41:52,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:41:52,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:41:52,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:41:52,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:41:52,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:41:52,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:41:52,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:41:52,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:41:52,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:41:52,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:41:52,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:41:52,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:41:52,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:41:52,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:41:52,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:41:52,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:41:52,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:41:52,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:41:52,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:41:52,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:41:52,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:41:52,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:41:52,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:41:52,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:41:52,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:41:52,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:41:52,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:41:52,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:41:52,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:41:52,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:41:52,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:41:52,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:41:52,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:41:52,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:41:52,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:41:52,726 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:41:52,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:41:52,727 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:41:52,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:41:52,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:41:52,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:41:52,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:41:52,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:41:52,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:41:52,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:41:52,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:41:52,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:41:52,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:41:52,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:41:52,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:41:52,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:41:52,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:41:52,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:41:52,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:41:52,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:41:52,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:41:52,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:41:52,730 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:41:52,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:41:52,730 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:41:52,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:41:52,731 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:41:52,731 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_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-12-13 17:41:52,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:41:52,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:41:52,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:41:52,914 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:41:52,915 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:41:52,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-13 17:41:55,529 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:41:55,681 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:41:55,681 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-13 17:41:55,687 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/data/98f93a458/1dbd9e9c441f400ba60565e1569fc6d8/FLAG55b9bdb07 [2022-12-13 17:41:55,701 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/data/98f93a458/1dbd9e9c441f400ba60565e1569fc6d8 [2022-12-13 17:41:55,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:41:55,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:41:55,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:41:55,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:41:55,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:41:55,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa7e1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55, skipping insertion in model container [2022-12-13 17:41:55,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:41:55,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:41:55,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,890 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,897 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_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-13 17:41:55,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:41:55,910 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:41:55,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,922 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,922 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,926 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,926 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:41:55,927 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:41:55,930 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_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-13 17:41:55,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:41:55,943 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:41:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55 WrapperNode [2022-12-13 17:41:55,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:41:55,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:41:55,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:41:55,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:41:55,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,972 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2022-12-13 17:41:55,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:41:55,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:41:55,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:41:55,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:41:55,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:55,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:41:55,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:41:55,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:41:55,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:41:55,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (1/1) ... [2022-12-13 17:41:56,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:41:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:41:56,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:41:56,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:41:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:41:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:41:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 17:41:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 17:41:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 17:41:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 17:41:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:41:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:41:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:41:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:41:56,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:41:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:41:56,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:41:56,055 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:41:56,138 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:41:56,140 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:41:56,394 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:41:56,450 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:41:56,450 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 17:41:56,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:41:56 BoogieIcfgContainer [2022-12-13 17:41:56,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:41:56,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:41:56,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:41:56,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:41:56,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:41:55" (1/3) ... [2022-12-13 17:41:56,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:41:56, skipping insertion in model container [2022-12-13 17:41:56,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:41:55" (2/3) ... [2022-12-13 17:41:56,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:41:56, skipping insertion in model container [2022-12-13 17:41:56,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:41:56" (3/3) ... [2022-12-13 17:41:56,459 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-12-13 17:41:56,466 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:41:56,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:41:56,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:41:56,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:41:56,530 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:41:56,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 172 transitions, 376 flow [2022-12-13 17:41:56,632 INFO L130 PetriNetUnfolder]: 12/168 cut-off events. [2022-12-13 17:41:56,632 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:41:56,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 168 events. 12/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-12-13 17:41:56,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 172 transitions, 376 flow [2022-12-13 17:41:56,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 155 transitions, 334 flow [2022-12-13 17:41:56,643 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:41:56,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 155 transitions, 334 flow [2022-12-13 17:41:56,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 155 transitions, 334 flow [2022-12-13 17:41:56,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 155 transitions, 334 flow [2022-12-13 17:41:56,684 INFO L130 PetriNetUnfolder]: 12/155 cut-off events. [2022-12-13 17:41:56,684 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:41:56,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 155 events. 12/155 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-12-13 17:41:56,686 INFO L119 LiptonReduction]: Number of co-enabled transitions 2280 [2022-12-13 17:42:02,438 INFO L134 LiptonReduction]: Checked pairs total: 3442 [2022-12-13 17:42:02,438 INFO L136 LiptonReduction]: Total number of compositions: 146 [2022-12-13 17:42:02,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:42:02,452 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;@6e05badd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:42:02,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 17:42:02,461 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2022-12-13 17:42:02,461 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:42:02,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:02,462 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] [2022-12-13 17:42:02,462 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)] === [2022-12-13 17:42:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 39158754, now seen corresponding path program 1 times [2022-12-13 17:42:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:02,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336342537] [2022-12-13 17:42:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336342537] [2022-12-13 17:42:02,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336342537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:02,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:02,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:42:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366074419] [2022-12-13 17:42:02,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:42:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:42:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:42:02,805 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2022-12-13 17:42:02,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:02,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:02,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2022-12-13 17:42:02,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:03,027 INFO L130 PetriNetUnfolder]: 1410/1888 cut-off events. [2022-12-13 17:42:03,027 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-12-13 17:42:03,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3978 conditions, 1888 events. 1410/1888 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7128 event pairs, 760 based on Foata normal form. 0/1413 useless extension candidates. Maximal degree in co-relation 3477. Up to 1542 conditions per place. [2022-12-13 17:42:03,037 INFO L137 encePairwiseOnDemand]: 314/318 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2022-12-13 17:42:03,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 215 flow [2022-12-13 17:42:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:42:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:42:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2022-12-13 17:42:03,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4921383647798742 [2022-12-13 17:42:03,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2022-12-13 17:42:03,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2022-12-13 17:42:03,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:03,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2022-12-13 17:42:03,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,060 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,061 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 86 flow. Second operand 4 states and 626 transitions. [2022-12-13 17:42:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 215 flow [2022-12-13 17:42:03,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 17:42:03,068 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2022-12-13 17:42:03,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2022-12-13 17:42:03,072 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2022-12-13 17:42:03,072 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2022-12-13 17:42:03,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:03,073 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, 1] [2022-12-13 17:42:03,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:42:03,073 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)] === [2022-12-13 17:42:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash -701637166, now seen corresponding path program 1 times [2022-12-13 17:42:03,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:03,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749727014] [2022-12-13 17:42:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:03,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:03,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749727014] [2022-12-13 17:42:03,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749727014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:03,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:03,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:42:03,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231714508] [2022-12-13 17:42:03,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:03,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:42:03,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:42:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:42:03,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2022-12-13 17:42:03,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:03,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2022-12-13 17:42:03,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:03,442 INFO L130 PetriNetUnfolder]: 1718/2336 cut-off events. [2022-12-13 17:42:03,442 INFO L131 PetriNetUnfolder]: For 543/543 co-relation queries the response was YES. [2022-12-13 17:42:03,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 2336 events. 1718/2336 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8092 event pairs, 977 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 1800. Up to 1790 conditions per place. [2022-12-13 17:42:03,453 INFO L137 encePairwiseOnDemand]: 314/318 looper letters, 47 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-12-13 17:42:03,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 233 flow [2022-12-13 17:42:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:42:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:42:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-12-13 17:42:03,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4944968553459119 [2022-12-13 17:42:03,455 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-12-13 17:42:03,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-12-13 17:42:03,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:03,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-12-13 17:42:03,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,459 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,459 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 84 flow. Second operand 4 states and 629 transitions. [2022-12-13 17:42:03,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 233 flow [2022-12-13 17:42:03,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 223 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 17:42:03,460 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 92 flow [2022-12-13 17:42:03,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-12-13 17:42:03,461 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2022-12-13 17:42:03,461 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 92 flow [2022-12-13 17:42:03,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:03,461 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, 1, 1] [2022-12-13 17:42:03,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:42:03,462 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)] === [2022-12-13 17:42:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash -637405416, now seen corresponding path program 1 times [2022-12-13 17:42:03,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:03,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222747501] [2022-12-13 17:42:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:03,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:42:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222747501] [2022-12-13 17:42:03,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222747501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:03,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:42:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085831031] [2022-12-13 17:42:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:03,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:42:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:42:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:42:03,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2022-12-13 17:42:03,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:03,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2022-12-13 17:42:03,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:03,800 INFO L130 PetriNetUnfolder]: 1632/2234 cut-off events. [2022-12-13 17:42:03,801 INFO L131 PetriNetUnfolder]: For 543/698 co-relation queries the response was YES. [2022-12-13 17:42:03,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5582 conditions, 2234 events. 1632/2234 cut-off events. For 543/698 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8452 event pairs, 977 based on Foata normal form. 155/1997 useless extension candidates. Maximal degree in co-relation 1676. Up to 1790 conditions per place. [2022-12-13 17:42:03,809 INFO L137 encePairwiseOnDemand]: 314/318 looper letters, 46 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-12-13 17:42:03,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 240 flow [2022-12-13 17:42:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:42:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:42:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2022-12-13 17:42:03,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4921383647798742 [2022-12-13 17:42:03,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2022-12-13 17:42:03,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2022-12-13 17:42:03,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:03,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2022-12-13 17:42:03,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,814 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,814 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 92 flow. Second operand 4 states and 626 transitions. [2022-12-13 17:42:03,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 240 flow [2022-12-13 17:42:03,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 231 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 17:42:03,816 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 100 flow [2022-12-13 17:42:03,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2022-12-13 17:42:03,816 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2022-12-13 17:42:03,817 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 100 flow [2022-12-13 17:42:03,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:03,817 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, 1, 1, 1] [2022-12-13 17:42:03,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:42:03,817 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)] === [2022-12-13 17:42:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1825777184, now seen corresponding path program 1 times [2022-12-13 17:42:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:03,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021908125] [2022-12-13 17:42:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:42:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021908125] [2022-12-13 17:42:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021908125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:03,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:03,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:42:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474031125] [2022-12-13 17:42:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:03,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:42:03,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:42:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:42:03,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 318 [2022-12-13 17:42:03,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:03,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:03,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 318 [2022-12-13 17:42:03,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:04,146 INFO L130 PetriNetUnfolder]: 1632/2235 cut-off events. [2022-12-13 17:42:04,146 INFO L131 PetriNetUnfolder]: For 899/1054 co-relation queries the response was YES. [2022-12-13 17:42:04,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5797 conditions, 2235 events. 1632/2235 cut-off events. For 899/1054 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8196 event pairs, 1243 based on Foata normal form. 155/1994 useless extension candidates. Maximal degree in co-relation 1879. Up to 2223 conditions per place. [2022-12-13 17:42:04,154 INFO L137 encePairwiseOnDemand]: 315/318 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-12-13 17:42:04,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 170 flow [2022-12-13 17:42:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:42:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:42:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2022-12-13 17:42:04,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2022-12-13 17:42:04,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2022-12-13 17:42:04,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2022-12-13 17:42:04,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:04,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2022-12-13 17:42:04,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:04,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:04,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:04,159 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 100 flow. Second operand 3 states and 470 transitions. [2022-12-13 17:42:04,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 170 flow [2022-12-13 17:42:04,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 164 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 17:42:04,160 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 106 flow [2022-12-13 17:42:04,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-12-13 17:42:04,161 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2022-12-13 17:42:04,161 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 106 flow [2022-12-13 17:42:04,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:04,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:04,161 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, 1, 1, 1, 1] [2022-12-13 17:42:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:42:04,161 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)] === [2022-12-13 17:42:04,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:04,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2034346916, now seen corresponding path program 1 times [2022-12-13 17:42:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:04,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65141019] [2022-12-13 17:42:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:42:04,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65141019] [2022-12-13 17:42:04,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65141019] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770247114] [2022-12-13 17:42:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:04,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:04,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:04,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:42:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 17:42:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:42:04,874 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 21 treesize of output 21 [2022-12-13 17:42:04,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-12-13 17:42:05,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-12-13 17:42:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:42:05,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:42:10,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770247114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:10,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:10,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 10] total 26 [2022-12-13 17:42:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544789375] [2022-12-13 17:42:10,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:10,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:42:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:42:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=538, Unknown=3, NotChecked=0, Total=702 [2022-12-13 17:42:11,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 318 [2022-12-13 17:42:11,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 106 flow. Second operand has 27 states, 27 states have (on average 109.25925925925925) internal successors, (2950), 27 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:11,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:11,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 318 [2022-12-13 17:42:11,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:18,079 INFO L130 PetriNetUnfolder]: 20840/28641 cut-off events. [2022-12-13 17:42:18,079 INFO L131 PetriNetUnfolder]: For 7944/7944 co-relation queries the response was YES. [2022-12-13 17:42:18,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73861 conditions, 28641 events. 20840/28641 cut-off events. For 7944/7944 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 161035 event pairs, 1026 based on Foata normal form. 14/22853 useless extension candidates. Maximal degree in co-relation 73847. Up to 5946 conditions per place. [2022-12-13 17:42:18,165 INFO L137 encePairwiseOnDemand]: 305/318 looper letters, 341 selfloop transitions, 117 changer transitions 467/925 dead transitions. [2022-12-13 17:42:18,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 925 transitions, 4610 flow [2022-12-13 17:42:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 17:42:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-13 17:42:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 6782 transitions. [2022-12-13 17:42:18,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3808400718778077 [2022-12-13 17:42:18,179 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 6782 transitions. [2022-12-13 17:42:18,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 6782 transitions. [2022-12-13 17:42:18,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:18,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 6782 transitions. [2022-12-13 17:42:18,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 121.10714285714286) internal successors, (6782), 56 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:18,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 318.0) internal successors, (18126), 57 states have internal predecessors, (18126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:18,217 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 318.0) internal successors, (18126), 57 states have internal predecessors, (18126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:18,218 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 106 flow. Second operand 56 states and 6782 transitions. [2022-12-13 17:42:18,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 925 transitions, 4610 flow [2022-12-13 17:42:18,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 925 transitions, 4606 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:42:18,350 INFO L231 Difference]: Finished difference. Result has 133 places, 181 transitions, 1119 flow [2022-12-13 17:42:18,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1119, PETRI_PLACES=133, PETRI_TRANSITIONS=181} [2022-12-13 17:42:18,351 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2022-12-13 17:42:18,351 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 181 transitions, 1119 flow [2022-12-13 17:42:18,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 109.25925925925925) internal successors, (2950), 27 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:18,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:18,353 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, 1, 1, 1, 1] [2022-12-13 17:42:18,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:42:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:18,555 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)] === [2022-12-13 17:42:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash 122790490, now seen corresponding path program 2 times [2022-12-13 17:42:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:18,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213771397] [2022-12-13 17:42:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:42:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:18,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213771397] [2022-12-13 17:42:18,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213771397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:18,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:18,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:42:18,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508854909] [2022-12-13 17:42:18,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:18,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:42:18,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:18,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:42:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:42:18,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 318 [2022-12-13 17:42:18,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 181 transitions, 1119 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:18,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:18,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 318 [2022-12-13 17:42:18,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:21,301 INFO L130 PetriNetUnfolder]: 13604/19217 cut-off events. [2022-12-13 17:42:21,301 INFO L131 PetriNetUnfolder]: For 242984/245097 co-relation queries the response was YES. [2022-12-13 17:42:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93841 conditions, 19217 events. 13604/19217 cut-off events. For 242984/245097 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 111684 event pairs, 1677 based on Foata normal form. 1706/20685 useless extension candidates. Maximal degree in co-relation 93784. Up to 11387 conditions per place. [2022-12-13 17:42:21,404 INFO L137 encePairwiseOnDemand]: 314/318 looper letters, 143 selfloop transitions, 4 changer transitions 308/456 dead transitions. [2022-12-13 17:42:21,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 456 transitions, 3696 flow [2022-12-13 17:42:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:42:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:42:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 802 transitions. [2022-12-13 17:42:21,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5044025157232704 [2022-12-13 17:42:21,406 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 802 transitions. [2022-12-13 17:42:21,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 802 transitions. [2022-12-13 17:42:21,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:21,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 802 transitions. [2022-12-13 17:42:21,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:21,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:21,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:21,412 INFO L175 Difference]: Start difference. First operand has 133 places, 181 transitions, 1119 flow. Second operand 5 states and 802 transitions. [2022-12-13 17:42:21,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 456 transitions, 3696 flow [2022-12-13 17:42:22,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 456 transitions, 3631 flow, removed 32 selfloop flow, removed 19 redundant places. [2022-12-13 17:42:22,579 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 610 flow [2022-12-13 17:42:22,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2022-12-13 17:42:22,579 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 53 predicate places. [2022-12-13 17:42:22,580 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 610 flow [2022-12-13 17:42:22,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,580 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:22,580 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, 1, 1, 1, 1] [2022-12-13 17:42:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:42:22,580 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)] === [2022-12-13 17:42:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1476848334, now seen corresponding path program 3 times [2022-12-13 17:42:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955493575] [2022-12-13 17:42:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:42:22,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:22,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955493575] [2022-12-13 17:42:22,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955493575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:22,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201039127] [2022-12-13 17:42:22,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:42:22,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:22,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:22,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:42:23,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:42:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 17:42:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:23,279 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 11 treesize of output 7 [2022-12-13 17:42:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:42:23,340 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 14 treesize of output 16 [2022-12-13 17:42:23,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:42:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:42:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:23,715 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_282 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_282) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (<= 2147483647 .cse0)))) is different from false [2022-12-13 17:42:27,919 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_282 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_282) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (+ .cse0 1))))) is different from false [2022-12-13 17:42:27,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:42:27,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2022-12-13 17:42:27,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 72 [2022-12-13 17:42:27,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-12-13 17:42:27,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-12-13 17:42:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-13 17:42:27,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201039127] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:27,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:27,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 27 [2022-12-13 17:42:27,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617237313] [2022-12-13 17:42:27,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:42:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:27,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:42:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=8, NotChecked=102, Total=812 [2022-12-13 17:42:27,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2022-12-13 17:42:27,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 610 flow. Second operand has 29 states, 29 states have (on average 113.0) internal successors, (3277), 29 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:27,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:27,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2022-12-13 17:42:27,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:39,300 INFO L130 PetriNetUnfolder]: 35632/49414 cut-off events. [2022-12-13 17:42:39,300 INFO L131 PetriNetUnfolder]: For 705673/705673 co-relation queries the response was YES. [2022-12-13 17:42:39,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240984 conditions, 49414 events. 35632/49414 cut-off events. For 705673/705673 co-relation queries the response was YES. Maximal size of possible extension queue 1758. Compared 302686 event pairs, 2169 based on Foata normal form. 36/49449 useless extension candidates. Maximal degree in co-relation 240942. Up to 10677 conditions per place. [2022-12-13 17:42:39,518 INFO L137 encePairwiseOnDemand]: 305/318 looper letters, 478 selfloop transitions, 217 changer transitions 1083/1778 dead transitions. [2022-12-13 17:42:39,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 1778 transitions, 14056 flow [2022-12-13 17:42:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-13 17:42:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-12-13 17:42:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 10799 transitions. [2022-12-13 17:42:39,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38589908519153804 [2022-12-13 17:42:39,529 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 10799 transitions. [2022-12-13 17:42:39,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 10799 transitions. [2022-12-13 17:42:39,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:39,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 10799 transitions. [2022-12-13 17:42:39,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 122.7159090909091) internal successors, (10799), 88 states have internal predecessors, (10799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:39,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 318.0) internal successors, (28302), 89 states have internal predecessors, (28302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:39,568 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 318.0) internal successors, (28302), 89 states have internal predecessors, (28302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:39,568 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 610 flow. Second operand 88 states and 10799 transitions. [2022-12-13 17:42:39,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 1778 transitions, 14056 flow [2022-12-13 17:42:42,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1778 transitions, 12348 flow, removed 814 selfloop flow, removed 13 redundant places. [2022-12-13 17:42:42,068 INFO L231 Difference]: Finished difference. Result has 226 places, 296 transitions, 2925 flow [2022-12-13 17:42:42,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=2925, PETRI_PLACES=226, PETRI_TRANSITIONS=296} [2022-12-13 17:42:42,069 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 186 predicate places. [2022-12-13 17:42:42,069 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 296 transitions, 2925 flow [2022-12-13 17:42:42,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 113.0) internal successors, (3277), 29 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:42,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:42:42,070 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, 1, 1, 1, 1] [2022-12-13 17:42:42,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:42:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:42,272 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)] === [2022-12-13 17:42:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash -155322978, now seen corresponding path program 4 times [2022-12-13 17:42:42,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401590616] [2022-12-13 17:42:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:42:42,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401590616] [2022-12-13 17:42:42,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401590616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306966794] [2022-12-13 17:42:42,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:42:42,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:42,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:42,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:42,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:42:42,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:42:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:42:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:42:43,006 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 14 treesize of output 16 [2022-12-13 17:42:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:42:43,032 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 14 treesize of output 16 [2022-12-13 17:42:43,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:42:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:42:43,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:43,318 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_348 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_348) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1))))) is different from false [2022-12-13 17:42:43,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 97 [2022-12-13 17:42:43,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2022-12-13 17:42:43,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-12-13 17:42:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:42:43,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306966794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:43,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:43,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 29 [2022-12-13 17:42:43,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541820695] [2022-12-13 17:42:43,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:43,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 17:42:43,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 17:42:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=703, Unknown=15, NotChecked=56, Total=930 [2022-12-13 17:42:43,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 318 [2022-12-13 17:42:43,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 296 transitions, 2925 flow. Second operand has 31 states, 31 states have (on average 109.90322580645162) internal successors, (3407), 31 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:43,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:42:43,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 318 [2022-12-13 17:42:43,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:42:58,294 INFO L130 PetriNetUnfolder]: 40699/56862 cut-off events. [2022-12-13 17:42:58,294 INFO L131 PetriNetUnfolder]: For 4175731/4175731 co-relation queries the response was YES. [2022-12-13 17:42:58,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525371 conditions, 56862 events. 40699/56862 cut-off events. For 4175731/4175731 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 361446 event pairs, 3700 based on Foata normal form. 23/56884 useless extension candidates. Maximal degree in co-relation 525266. Up to 13159 conditions per place. [2022-12-13 17:42:59,035 INFO L137 encePairwiseOnDemand]: 306/318 looper letters, 342 selfloop transitions, 307 changer transitions 965/1614 dead transitions. [2022-12-13 17:42:59,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1614 transitions, 25344 flow [2022-12-13 17:42:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-13 17:42:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-12-13 17:42:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 8238 transitions. [2022-12-13 17:42:59,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3754443532950506 [2022-12-13 17:42:59,046 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 8238 transitions. [2022-12-13 17:42:59,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 8238 transitions. [2022-12-13 17:42:59,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:42:59,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 8238 transitions. [2022-12-13 17:42:59,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 119.3913043478261) internal successors, (8238), 69 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:59,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 318.0) internal successors, (22260), 70 states have internal predecessors, (22260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:59,078 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 318.0) internal successors, (22260), 70 states have internal predecessors, (22260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:59,078 INFO L175 Difference]: Start difference. First operand has 226 places, 296 transitions, 2925 flow. Second operand 69 states and 8238 transitions. [2022-12-13 17:42:59,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1614 transitions, 25344 flow [2022-12-13 17:43:33,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1614 transitions, 18644 flow, removed 3205 selfloop flow, removed 43 redundant places. [2022-12-13 17:43:33,081 INFO L231 Difference]: Finished difference. Result has 257 places, 415 transitions, 5463 flow [2022-12-13 17:43:33,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=5463, PETRI_PLACES=257, PETRI_TRANSITIONS=415} [2022-12-13 17:43:33,082 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 217 predicate places. [2022-12-13 17:43:33,082 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 415 transitions, 5463 flow [2022-12-13 17:43:33,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 109.90322580645162) internal successors, (3407), 31 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:33,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:43:33,083 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, 1, 1, 1, 1] [2022-12-13 17:43:33,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 17:43:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:43:33,284 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)] === [2022-12-13 17:43:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:43:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash -673998874, now seen corresponding path program 5 times [2022-12-13 17:43:33,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:43:33,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57641517] [2022-12-13 17:43:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:43:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:43:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:43:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:43:33,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:43:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57641517] [2022-12-13 17:43:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57641517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:43:33,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:43:33,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:43:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750748524] [2022-12-13 17:43:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:43:33,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:43:33,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:43:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:43:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:43:33,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 318 [2022-12-13 17:43:33,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 415 transitions, 5463 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:33,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:43:33,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 318 [2022-12-13 17:43:33,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:43:41,649 INFO L130 PetriNetUnfolder]: 28369/40283 cut-off events. [2022-12-13 17:43:41,649 INFO L131 PetriNetUnfolder]: For 4901200/4907205 co-relation queries the response was YES. [2022-12-13 17:43:42,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460111 conditions, 40283 events. 28369/40283 cut-off events. For 4901200/4907205 co-relation queries the response was YES. Maximal size of possible extension queue 1671. Compared 256159 event pairs, 7250 based on Foata normal form. 1509/40971 useless extension candidates. Maximal degree in co-relation 459986. Up to 31144 conditions per place. [2022-12-13 17:43:42,226 INFO L137 encePairwiseOnDemand]: 314/318 looper letters, 410 selfloop transitions, 26 changer transitions 290/741 dead transitions. [2022-12-13 17:43:42,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 741 transitions, 11573 flow [2022-12-13 17:43:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:43:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:43:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2022-12-13 17:43:42,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5006289308176101 [2022-12-13 17:43:42,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2022-12-13 17:43:42,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2022-12-13 17:43:42,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:43:42,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2022-12-13 17:43:42,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:42,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:42,230 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:42,230 INFO L175 Difference]: Start difference. First operand has 257 places, 415 transitions, 5463 flow. Second operand 5 states and 796 transitions. [2022-12-13 17:43:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 741 transitions, 11573 flow [2022-12-13 17:44:04,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 741 transitions, 10476 flow, removed 475 selfloop flow, removed 51 redundant places. [2022-12-13 17:44:04,008 INFO L231 Difference]: Finished difference. Result has 163 places, 395 transitions, 4737 flow [2022-12-13 17:44:04,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4737, PETRI_PLACES=163, PETRI_TRANSITIONS=395} [2022-12-13 17:44:04,009 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2022-12-13 17:44:04,009 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 395 transitions, 4737 flow [2022-12-13 17:44:04,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:04,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:44:04,009 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, 1, 1, 1, 1] [2022-12-13 17:44:04,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:44:04,009 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)] === [2022-12-13 17:44:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash -758052768, now seen corresponding path program 6 times [2022-12-13 17:44:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:04,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239941724] [2022-12-13 17:44:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:44:04,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239941724] [2022-12-13 17:44:04,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239941724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535326068] [2022-12-13 17:44:04,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:44:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:04,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:04,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:44:04,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:44:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:44:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:04,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:44:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:44:04,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:44:04,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535326068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:04,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:04,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 19 [2022-12-13 17:44:04,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683226889] [2022-12-13 17:44:04,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:04,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:44:04,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:44:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:44:05,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 318 [2022-12-13 17:44:05,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 395 transitions, 4737 flow. Second operand has 20 states, 20 states have (on average 137.0) internal successors, (2740), 20 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:05,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:44:05,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 318 [2022-12-13 17:44:05,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:44:26,342 INFO L130 PetriNetUnfolder]: 81561/114811 cut-off events. [2022-12-13 17:44:26,342 INFO L131 PetriNetUnfolder]: For 4775129/4781183 co-relation queries the response was YES. [2022-12-13 17:44:27,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926461 conditions, 114811 events. 81561/114811 cut-off events. For 4775129/4781183 co-relation queries the response was YES. Maximal size of possible extension queue 4694. Compared 819411 event pairs, 9552 based on Foata normal form. 3002/116543 useless extension candidates. Maximal degree in co-relation 926382. Up to 27654 conditions per place. [2022-12-13 17:44:27,461 INFO L137 encePairwiseOnDemand]: 306/318 looper letters, 541 selfloop transitions, 223 changer transitions 1831/2610 dead transitions. [2022-12-13 17:44:27,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 2610 transitions, 37044 flow [2022-12-13 17:44:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:44:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 17:44:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7363 transitions. [2022-12-13 17:44:27,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4630817610062893 [2022-12-13 17:44:27,467 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7363 transitions. [2022-12-13 17:44:27,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7363 transitions. [2022-12-13 17:44:27,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:44:27,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7363 transitions. [2022-12-13 17:44:27,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 147.26) internal successors, (7363), 50 states have internal predecessors, (7363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:27,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 318.0) internal successors, (16218), 51 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:27,483 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 318.0) internal successors, (16218), 51 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:27,483 INFO L175 Difference]: Start difference. First operand has 163 places, 395 transitions, 4737 flow. Second operand 50 states and 7363 transitions. [2022-12-13 17:44:27,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 2610 transitions, 37044 flow [2022-12-13 17:45:21,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 2610 transitions, 36166 flow, removed 327 selfloop flow, removed 4 redundant places. [2022-12-13 17:45:21,144 INFO L231 Difference]: Finished difference. Result has 252 places, 484 transitions, 7366 flow [2022-12-13 17:45:21,145 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=7366, PETRI_PLACES=252, PETRI_TRANSITIONS=484} [2022-12-13 17:45:21,145 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2022-12-13 17:45:21,145 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 484 transitions, 7366 flow [2022-12-13 17:45:21,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.0) internal successors, (2740), 20 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:21,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:21,146 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, 1, 1, 1, 1] [2022-12-13 17:45:21,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:45:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:45:21,348 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)] === [2022-12-13 17:45:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:21,349 INFO L85 PathProgramCache]: Analyzing trace with hash 987268116, now seen corresponding path program 7 times [2022-12-13 17:45:21,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:21,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508766085] [2022-12-13 17:45:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:21,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:45:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508766085] [2022-12-13 17:45:21,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508766085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039869796] [2022-12-13 17:45:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:21,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:21,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:21,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:45:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:45:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:21,806 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 14 treesize of output 16 [2022-12-13 17:45:21,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:45:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:45:21,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:22,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-13 17:45:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:45:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039869796] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:22,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:45:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 9] total 25 [2022-12-13 17:45:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183891441] [2022-12-13 17:45:22,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:22,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:45:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:45:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=567, Unknown=2, NotChecked=0, Total=702 [2022-12-13 17:45:22,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 318 [2022-12-13 17:45:22,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 484 transitions, 7366 flow. Second operand has 12 states, 12 states have (on average 117.5) internal successors, (1410), 12 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:22,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:22,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 318 [2022-12-13 17:45:22,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:39,906 INFO L130 PetriNetUnfolder]: 54817/77335 cut-off events. [2022-12-13 17:45:39,906 INFO L131 PetriNetUnfolder]: For 8995452/9000067 co-relation queries the response was YES. [2022-12-13 17:45:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913827 conditions, 77335 events. 54817/77335 cut-off events. For 8995452/9000067 co-relation queries the response was YES. Maximal size of possible extension queue 3133. Compared 528488 event pairs, 11156 based on Foata normal form. 2258/78659 useless extension candidates. Maximal degree in co-relation 913702. Up to 31429 conditions per place. [2022-12-13 17:45:41,164 INFO L137 encePairwiseOnDemand]: 307/318 looper letters, 558 selfloop transitions, 212 changer transitions 256/1041 dead transitions. [2022-12-13 17:45:41,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1041 transitions, 19266 flow [2022-12-13 17:45:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:45:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:45:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1160 transitions. [2022-12-13 17:45:41,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4053109713487072 [2022-12-13 17:45:41,166 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1160 transitions. [2022-12-13 17:45:41,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1160 transitions. [2022-12-13 17:45:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:41,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1160 transitions. [2022-12-13 17:45:41,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.88888888888889) internal successors, (1160), 9 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,170 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,170 INFO L175 Difference]: Start difference. First operand has 252 places, 484 transitions, 7366 flow. Second operand 9 states and 1160 transitions. [2022-12-13 17:45:41,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1041 transitions, 19266 flow [2022-12-13 17:46:28,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1041 transitions, 17818 flow, removed 494 selfloop flow, removed 35 redundant places. [2022-12-13 17:46:28,784 INFO L231 Difference]: Finished difference. Result has 198 places, 581 transitions, 9468 flow [2022-12-13 17:46:28,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9468, PETRI_PLACES=198, PETRI_TRANSITIONS=581} [2022-12-13 17:46:28,785 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2022-12-13 17:46:28,785 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 581 transitions, 9468 flow [2022-12-13 17:46:28,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.5) internal successors, (1410), 12 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:28,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:28,785 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, 1, 1, 1, 1] [2022-12-13 17:46:28,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:46:28,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:28,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 17:46:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1184536762, now seen corresponding path program 8 times [2022-12-13 17:46:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:28,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706770431] [2022-12-13 17:46:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:46:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706770431] [2022-12-13 17:46:29,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706770431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128378106] [2022-12-13 17:46:29,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:46:29,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:29,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:29,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:46:29,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:46:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 17:46:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:29,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:46:29,688 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 14 treesize of output 16 [2022-12-13 17:46:29,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:46:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:29,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:30,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-13 17:46:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:46:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128378106] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:30,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:46:30,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 9] total 25 [2022-12-13 17:46:30,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725181532] [2022-12-13 17:46:30,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:46:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:46:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:46:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-12-13 17:46:30,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 318 [2022-12-13 17:46:30,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 581 transitions, 9468 flow. Second operand has 12 states, 12 states have (on average 125.5) internal successors, (1506), 12 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:30,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:30,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 318 [2022-12-13 17:46:30,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:46:49,437 INFO L130 PetriNetUnfolder]: 58974/83236 cut-off events. [2022-12-13 17:46:49,437 INFO L131 PetriNetUnfolder]: For 7906611/7911559 co-relation queries the response was YES. [2022-12-13 17:46:50,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948226 conditions, 83236 events. 58974/83236 cut-off events. For 7906611/7911559 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 575707 event pairs, 12859 based on Foata normal form. 2270/84476 useless extension candidates. Maximal degree in co-relation 948122. Up to 23245 conditions per place. [2022-12-13 17:46:50,623 INFO L137 encePairwiseOnDemand]: 307/318 looper letters, 485 selfloop transitions, 158 changer transitions 624/1282 dead transitions. [2022-12-13 17:46:50,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1282 transitions, 24725 flow [2022-12-13 17:46:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:46:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:46:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1647 transitions. [2022-12-13 17:46:50,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43160377358490565 [2022-12-13 17:46:50,627 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1647 transitions. [2022-12-13 17:46:50,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1647 transitions. [2022-12-13 17:46:50,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:50,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1647 transitions. [2022-12-13 17:46:50,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.25) internal successors, (1647), 12 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:50,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 318.0) internal successors, (4134), 13 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:50,634 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 318.0) internal successors, (4134), 13 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:50,634 INFO L175 Difference]: Start difference. First operand has 198 places, 581 transitions, 9468 flow. Second operand 12 states and 1647 transitions. [2022-12-13 17:46:50,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1282 transitions, 24725 flow [2022-12-13 17:47:50,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 1282 transitions, 23928 flow, removed 388 selfloop flow, removed 10 redundant places. [2022-12-13 17:47:50,540 INFO L231 Difference]: Finished difference. Result has 208 places, 518 transitions, 9118 flow [2022-12-13 17:47:50,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=9263, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9118, PETRI_PLACES=208, PETRI_TRANSITIONS=518} [2022-12-13 17:47:50,542 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 168 predicate places. [2022-12-13 17:47:50,542 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 518 transitions, 9118 flow [2022-12-13 17:47:50,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 125.5) internal successors, (1506), 12 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:50,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:47:50,542 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, 1, 1, 1, 1] [2022-12-13 17:47:50,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 17:47:50,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:50,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 17:47:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash 599508382, now seen corresponding path program 9 times [2022-12-13 17:47:50,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860909683] [2022-12-13 17:47:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:50,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:47:51,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860909683] [2022-12-13 17:47:51,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860909683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111771152] [2022-12-13 17:47:51,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:47:51,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:51,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:51,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:47:51,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:47:51,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 17:47:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:51,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 628 treesize of output 612 [2022-12-13 17:47:51,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:47:51,523 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 14 treesize of output 16 [2022-12-13 17:47:51,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:47:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:47:51,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:51,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 113 [2022-12-13 17:47:51,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-12-13 17:47:51,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2022-12-13 17:47:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:47:52,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111771152] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:52,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:52,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 27 [2022-12-13 17:47:52,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269442807] [2022-12-13 17:47:52,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:52,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:47:52,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:47:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=657, Unknown=11, NotChecked=0, Total=812 [2022-12-13 17:47:52,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 318 [2022-12-13 17:47:52,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 518 transitions, 9118 flow. Second operand has 29 states, 29 states have (on average 114.89655172413794) internal successors, (3332), 29 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:52,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:47:52,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 318 [2022-12-13 17:47:52,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:14,560 INFO L130 PetriNetUnfolder]: 64895/92127 cut-off events. [2022-12-13 17:48:14,560 INFO L131 PetriNetUnfolder]: For 7966929/7971798 co-relation queries the response was YES. [2022-12-13 17:48:15,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020124 conditions, 92127 events. 64895/92127 cut-off events. For 7966929/7971798 co-relation queries the response was YES. Maximal size of possible extension queue 3953. Compared 653974 event pairs, 4388 based on Foata normal form. 2118/93324 useless extension candidates. Maximal degree in co-relation 1020018. Up to 24253 conditions per place. [2022-12-13 17:48:15,754 INFO L137 encePairwiseOnDemand]: 308/318 looper letters, 386 selfloop transitions, 325 changer transitions 732/1452 dead transitions. [2022-12-13 17:48:15,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1452 transitions, 29978 flow [2022-12-13 17:48:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 17:48:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 17:48:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4207 transitions. [2022-12-13 17:48:15,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38910469848316687 [2022-12-13 17:48:15,759 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4207 transitions. [2022-12-13 17:48:15,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4207 transitions. [2022-12-13 17:48:15,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:15,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4207 transitions. [2022-12-13 17:48:15,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 123.73529411764706) internal successors, (4207), 34 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:15,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:15,769 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:15,769 INFO L175 Difference]: Start difference. First operand has 208 places, 518 transitions, 9118 flow. Second operand 34 states and 4207 transitions. [2022-12-13 17:48:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1452 transitions, 29978 flow [2022-12-13 17:48:49,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1452 transitions, 28708 flow, removed 479 selfloop flow, removed 15 redundant places. [2022-12-13 17:48:49,525 INFO L231 Difference]: Finished difference. Result has 251 places, 558 transitions, 11832 flow [2022-12-13 17:48:49,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11832, PETRI_PLACES=251, PETRI_TRANSITIONS=558} [2022-12-13 17:48:49,525 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 211 predicate places. [2022-12-13 17:48:49,525 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 558 transitions, 11832 flow [2022-12-13 17:48:49,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.89655172413794) internal successors, (3332), 29 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:49,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:49,526 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, 1, 1, 1, 1] [2022-12-13 17:48:49,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:48:49,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:49,728 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 17:48:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2123832456, now seen corresponding path program 10 times [2022-12-13 17:48:49,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:49,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597188850] [2022-12-13 17:48:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:48:49,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597188850] [2022-12-13 17:48:49,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597188850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711617966] [2022-12-13 17:48:49,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:48:49,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:49,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:49,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:49,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:48:50,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:48:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:48:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:48:50,197 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 14 treesize of output 16 [2022-12-13 17:48:50,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:50,228 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 61 treesize of output 39 [2022-12-13 17:48:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:48:50,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:56,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:56,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 245 treesize of output 265 [2022-12-13 17:48:56,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:56,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 148 treesize of output 139 [2022-12-13 17:48:56,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:56,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 119 [2022-12-13 17:48:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:48:56,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711617966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:56,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:56,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-12-13 17:48:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717761631] [2022-12-13 17:48:56,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:56,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:48:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:48:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=338, Unknown=8, NotChecked=0, Total=420 [2022-12-13 17:48:59,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:01,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:03,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:05,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:06,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:09,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:09,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 318 [2022-12-13 17:49:09,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 558 transitions, 11832 flow. Second operand has 21 states, 21 states have (on average 128.85714285714286) internal successors, (2706), 21 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:09,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:09,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 318 [2022-12-13 17:49:09,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:25,507 INFO L130 PetriNetUnfolder]: 43207/61748 cut-off events. [2022-12-13 17:49:25,507 INFO L131 PetriNetUnfolder]: For 7309810/7312513 co-relation queries the response was YES. [2022-12-13 17:49:26,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776504 conditions, 61748 events. 43207/61748 cut-off events. For 7309810/7312513 co-relation queries the response was YES. Maximal size of possible extension queue 2687. Compared 419746 event pairs, 17655 based on Foata normal form. 1054/62302 useless extension candidates. Maximal degree in co-relation 776378. Up to 38522 conditions per place. [2022-12-13 17:49:26,363 INFO L137 encePairwiseOnDemand]: 309/318 looper letters, 389 selfloop transitions, 30 changer transitions 428/856 dead transitions. [2022-12-13 17:49:26,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 856 transitions, 20287 flow [2022-12-13 17:49:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:49:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:49:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1362 transitions. [2022-12-13 17:49:26,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42830188679245285 [2022-12-13 17:49:26,365 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1362 transitions. [2022-12-13 17:49:26,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1362 transitions. [2022-12-13 17:49:26,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:26,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1362 transitions. [2022-12-13 17:49:26,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.2) internal successors, (1362), 10 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 318.0) internal successors, (3498), 11 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,368 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 318.0) internal successors, (3498), 11 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,369 INFO L175 Difference]: Start difference. First operand has 251 places, 558 transitions, 11832 flow. Second operand 10 states and 1362 transitions. [2022-12-13 17:49:26,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 856 transitions, 20287 flow [2022-12-13 17:50:03,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 856 transitions, 18763 flow, removed 750 selfloop flow, removed 31 redundant places. [2022-12-13 17:50:03,553 INFO L231 Difference]: Finished difference. Result has 201 places, 402 transitions, 7451 flow [2022-12-13 17:50:03,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7451, PETRI_PLACES=201, PETRI_TRANSITIONS=402} [2022-12-13 17:50:03,554 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 161 predicate places. [2022-12-13 17:50:03,554 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 402 transitions, 7451 flow [2022-12-13 17:50:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 128.85714285714286) internal successors, (2706), 21 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:03,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:03,554 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, 1, 1, 1, 1] [2022-12-13 17:50:03,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 17:50:03,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 17:50:03,757 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 17:50:03,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash 416688498, now seen corresponding path program 11 times [2022-12-13 17:50:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:03,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692085944] [2022-12-13 17:50:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:03,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:50:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692085944] [2022-12-13 17:50:04,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692085944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524422649] [2022-12-13 17:50:04,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:50:04,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:04,203 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:04,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942d3b6-447c-4380-b0b0-cfb3cd59fb7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:50:04,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:50:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 17:50:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:04,331 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 11 treesize of output 7 [2022-12-13 17:50:04,370 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 [2022-12-13 17:50:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:04,433 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 14 treesize of output 16 [2022-12-13 17:50:04,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:04,503 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 14 treesize of output 16 [2022-12-13 17:50:04,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-13 17:50:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:04,575 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 16 treesize of output 18 [2022-12-13 17:50:04,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 17:50:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:04,890 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_781 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (<= 2147483647 .cse0)))) is different from false [2022-12-13 17:50:12,999 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_781 (Array Int Int)) (v_ArrVal_779 Int)) (let ((.cse1 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select (select (store (store |c_#memory_int| c_~A~0.base (store .cse1 c_~A~0.offset v_ArrVal_779)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (not (<= (select .cse1 c_~A~0.offset) (+ v_ArrVal_779 1))) (<= 2147483647 .cse0))))) is different from false [2022-12-13 17:50:13,021 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_778 (Array Int Int)) (v_ArrVal_781 (Array Int Int)) (v_ArrVal_779 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_778))) (let ((.cse0 (select .cse2 c_~A~0.base))) (let ((.cse1 (select (select (store (store .cse2 c_~A~0.base (store .cse0 c_~A~0.offset v_ArrVal_779)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) c_~A~0.base) c_~A~0.offset))) (or (not (<= (select .cse0 c_~A~0.offset) (+ v_ArrVal_779 1))) (<= c_~min~0 (+ .cse1 1)) (<= 2147483647 .cse1)))))) is different from false [2022-12-13 17:50:19,509 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_777 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_777))) (let ((.cse2 (select (select .cse4 c_~A~0.base) c_~A~0.offset))) (or (forall ((v_ArrVal_778 (Array Int Int)) (v_ArrVal_781 (Array Int Int)) (v_ArrVal_779 Int)) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_778))) (let ((.cse0 (select .cse3 c_~A~0.base))) (let ((.cse1 (select (select (store (store .cse3 c_~A~0.base (store .cse0 c_~A~0.offset v_ArrVal_779)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) c_~A~0.base) c_~A~0.offset))) (or (not (<= (select .cse0 c_~A~0.offset) (+ v_ArrVal_779 1))) (<= 2147483647 .cse1) (<= .cse2 (+ .cse1 1))))))) (< .cse5 .cse2))))) (forall ((v_ArrVal_777 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_777))) (or (forall ((v_ArrVal_778 (Array Int Int)) (v_ArrVal_781 (Array Int Int)) (v_ArrVal_779 Int)) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_778))) (let ((.cse6 (select .cse8 c_~A~0.base))) (let ((.cse7 (select (select (store (store .cse8 c_~A~0.base (store .cse6 c_~A~0.offset v_ArrVal_779)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) c_~A~0.base) c_~A~0.offset))) (or (not (<= (select .cse6 c_~A~0.offset) (+ v_ArrVal_779 1))) (<= .cse5 (+ .cse7 1)) (<= 2147483647 .cse7)))))) (not (< .cse5 (select (select .cse9 c_~A~0.base) c_~A~0.offset)))))))) is different from false [2022-12-13 17:50:19,582 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_777 (Array Int Int)) (v_ArrVal_776 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_776))) (let ((.cse4 (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_777))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (forall ((v_ArrVal_778 (Array Int Int)) (v_ArrVal_781 (Array Int Int)) (v_ArrVal_779 Int)) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_778))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse0 (select (select (store (store .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_779)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (<= 2147483647 .cse0) (not (<= (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ v_ArrVal_779 1))) (<= .cse2 (+ .cse0 1))))))) (< (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) .cse2)))))) (forall ((v_ArrVal_777 (Array Int Int)) (v_ArrVal_776 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_776))) (let ((.cse8 (select (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse10 (store .cse11 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_777))) (or (forall ((v_ArrVal_778 (Array Int Int)) (v_ArrVal_781 (Array Int Int)) (v_ArrVal_779 Int)) (let ((.cse9 (store .cse10 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_778))) (let ((.cse7 (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse6 (select (select (store (store .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_779)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (<= 2147483647 .cse6) (not (<= (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ v_ArrVal_779 1))) (<= .cse8 (+ .cse6 1))))))) (not (< .cse8 (select (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))))) is different from false [2022-12-13 17:50:19,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:50:19,600 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 136 [2022-12-13 17:50:19,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5551 treesize of output 5275 [2022-12-13 17:50:19,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4907 treesize of output 4619 [2022-12-13 17:50:19,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2476 treesize of output 2338 [2022-12-13 17:50:19,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4444 treesize of output 4168 [2022-12-13 17:50:19,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 246 [2022-12-13 17:51:10,833 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 17:51:10,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 1 [2022-12-13 17:51:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 17:51:10,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524422649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:10,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:10,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 15] total 39 [2022-12-13 17:51:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010041106] [2022-12-13 17:51:10,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 17:51:10,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 17:51:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1013, Unknown=38, NotChecked=360, Total=1640 [2022-12-13 17:51:10,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 318 [2022-12-13 17:51:10,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 402 transitions, 7451 flow. Second operand has 41 states, 41 states have (on average 98.1951219512195) internal successors, (4026), 41 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:10,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:51:10,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 318 [2022-12-13 17:51:10,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:51:27,622 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 77 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:52:00,218 WARN L233 SmtUtils]: Spent 26.21s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:52:26,335 WARN L233 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 80 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:52:52,733 WARN L233 SmtUtils]: Spent 26.21s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:53:05,806 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:53:14,757 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:53:25,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:34,095 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 83 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:53:36,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:38,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:46,911 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 82 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:53:53,785 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:53:56,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:54:05,437 WARN L233 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:54:14,135 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:54:25,792 WARN L233 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:54:27,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:55:19,653 WARN L233 SmtUtils]: Spent 50.43s on a formula simplification. DAG size of input: 94 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)