./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:33:34,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:33:34,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:33:34,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:33:34,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:33:34,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:33:34,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:33:34,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:33:34,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:33:34,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:33:34,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:33:34,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:33:34,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:33:34,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:33:34,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:33:34,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:33:34,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:33:34,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:33:34,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:33:34,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:33:34,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:33:34,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:33:34,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:33:34,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:33:34,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:33:34,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:33:34,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:33:34,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:33:34,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:33:34,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:33:34,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:33:34,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:33:34,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:33:34,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:33:34,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:33:34,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:33:34,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:33:34,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:33:34,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:33:34,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:33:34,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:33:34,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:33:34,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:33:34,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:33:34,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:33:34,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:33:34,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:33:34,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:33:34,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:33:34,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:33:34,887 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:33:34,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:33:34,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:33:34,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:33:34,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:33:34,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:33:34,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:33:34,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:33:34,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:33:34,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:33:34,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:33:34,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:33:34,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:33:34,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:33:34,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:33:34,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:33:34,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:33:34,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:33:34,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:33:34,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:33:34,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:33:34,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:33:34,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:33:34,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:33:34,893 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:33:34,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:33:34,893 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_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2022-11-25 18:33:35,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:33:35,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:33:35,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:33:35,375 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:33:35,376 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:33:35,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-25 18:33:39,065 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:33:39,414 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:33:39,417 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-25 18:33:39,431 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/data/c0e327fdc/86fd180339c84b848ebf28b3eccab5db/FLAGab66d34f9 [2022-11-25 18:33:39,458 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/data/c0e327fdc/86fd180339c84b848ebf28b3eccab5db [2022-11-25 18:33:39,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:33:39,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:33:39,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:33:39,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:33:39,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:33:39,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:33:39" (1/1) ... [2022-11-25 18:33:39,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ec2b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:39, skipping insertion in model container [2022-11-25 18:33:39,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:33:39" (1/1) ... [2022-11-25 18:33:39,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:33:39,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:33:39,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,863 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,869 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,900 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_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-25 18:33:39,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:33:39,926 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:33:39,945 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,948 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:33:39,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:33:39,996 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_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-25 18:33:40,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:33:40,031 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:33:40,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40 WrapperNode [2022-11-25 18:33:40,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:33:40,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:33:40,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:33:40,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:33:40,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,096 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 336 [2022-11-25 18:33:40,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:33:40,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:33:40,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:33:40,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:33:40,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:33:40,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:33:40,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:33:40,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:33:40,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (1/1) ... [2022-11-25 18:33:40,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:33:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:33:40,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:33:40,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:33:40,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:33:40,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:33:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:33:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:33:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:33:40,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:33:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:33:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:33:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:33:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:33:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:33:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:33:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:33:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:33:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:33:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:33:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:33:40,292 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:33:40,545 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:33:40,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:33:41,401 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:33:41,710 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:33:41,713 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 18:33:41,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:33:41 BoogieIcfgContainer [2022-11-25 18:33:41,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:33:41,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:33:41,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:33:41,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:33:41,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:33:39" (1/3) ... [2022-11-25 18:33:41,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e48a32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:33:41, skipping insertion in model container [2022-11-25 18:33:41,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:33:40" (2/3) ... [2022-11-25 18:33:41,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e48a32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:33:41, skipping insertion in model container [2022-11-25 18:33:41,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:33:41" (3/3) ... [2022-11-25 18:33:41,735 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2022-11-25 18:33:41,748 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:33:41,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:33:41,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:33:41,762 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:33:41,890 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:33:41,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 273 transitions, 570 flow [2022-11-25 18:33:42,061 INFO L130 PetriNetUnfolder]: 27/270 cut-off events. [2022-11-25 18:33:42,061 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:33:42,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 270 events. 27/270 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 229. Up to 6 conditions per place. [2022-11-25 18:33:42,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 273 transitions, 570 flow [2022-11-25 18:33:42,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 259 transitions, 536 flow [2022-11-25 18:33:42,082 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:33:42,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 259 transitions, 536 flow [2022-11-25 18:33:42,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 259 transitions, 536 flow [2022-11-25 18:33:42,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 259 transitions, 536 flow [2022-11-25 18:33:42,238 INFO L130 PetriNetUnfolder]: 27/259 cut-off events. [2022-11-25 18:33:42,238 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:33:42,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 259 events. 27/259 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 169 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 229. Up to 6 conditions per place. [2022-11-25 18:33:42,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 2442 [2022-11-25 18:33:58,731 INFO L134 LiptonReduction]: Checked pairs total: 2200 [2022-11-25 18:33:58,731 INFO L136 LiptonReduction]: Total number of compositions: 285 [2022-11-25 18:33:58,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:33:58,760 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;@763be024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:33:58,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:33:58,789 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2022-11-25 18:33:58,790 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:33:58,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:58,791 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:58,792 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 1 more)] === [2022-11-25 18:33:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2128583384, now seen corresponding path program 1 times [2022-11-25 18:33:58,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:33:58,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691472248] [2022-11-25 18:33:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:58,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:33:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:33:59,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:33:59,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691472248] [2022-11-25 18:33:59,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691472248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:59,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:59,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:33:59,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725258384] [2022-11-25 18:33:59,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:59,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:33:59,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:33:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:33:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:33:59,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 558 [2022-11-25 18:33:59,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:59,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:59,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 558 [2022-11-25 18:33:59,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:59,948 INFO L130 PetriNetUnfolder]: 164/251 cut-off events. [2022-11-25 18:33:59,948 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 18:33:59,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 251 events. 164/251 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 612 event pairs, 37 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2022-11-25 18:33:59,955 INFO L137 encePairwiseOnDemand]: 553/558 looper letters, 36 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2022-11-25 18:33:59,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 197 flow [2022-11-25 18:33:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:33:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:33:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2022-11-25 18:33:59,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.460573476702509 [2022-11-25 18:33:59,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2022-11-25 18:33:59,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2022-11-25 18:33:59,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:59,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2022-11-25 18:33:59,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,008 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 3 states and 771 transitions. [2022-11-25 18:34:00,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 197 flow [2022-11-25 18:34:00,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:34:00,015 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 82 flow [2022-11-25 18:34:00,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2022-11-25 18:34:00,021 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-11-25 18:34:00,022 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 82 flow [2022-11-25 18:34:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:00,023 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] [2022-11-25 18:34:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:34:00,023 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 1 more)] === [2022-11-25 18:34:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2142061559, now seen corresponding path program 1 times [2022-11-25 18:34:00,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:00,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020439422] [2022-11-25 18:34:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:00,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:00,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020439422] [2022-11-25 18:34:00,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020439422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:00,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:00,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:34:00,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815415867] [2022-11-25 18:34:00,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:00,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:34:00,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:34:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:00,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 558 [2022-11-25 18:34:00,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:00,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 558 [2022-11-25 18:34:00,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:01,258 INFO L130 PetriNetUnfolder]: 215/343 cut-off events. [2022-11-25 18:34:01,258 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-25 18:34:01,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 343 events. 215/343 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 957 event pairs, 74 based on Foata normal form. 28/365 useless extension candidates. Maximal degree in co-relation 350. Up to 175 conditions per place. [2022-11-25 18:34:01,265 INFO L137 encePairwiseOnDemand]: 548/558 looper letters, 46 selfloop transitions, 12 changer transitions 2/60 dead transitions. [2022-11-25 18:34:01,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 279 flow [2022-11-25 18:34:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:34:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:34:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1406 transitions. [2022-11-25 18:34:01,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4199522102747909 [2022-11-25 18:34:01,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1406 transitions. [2022-11-25 18:34:01,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1406 transitions. [2022-11-25 18:34:01,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:01,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1406 transitions. [2022-11-25 18:34:01,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:01,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 558.0) internal successors, (3906), 7 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:01,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 558.0) internal successors, (3906), 7 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:01,285 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 82 flow. Second operand 6 states and 1406 transitions. [2022-11-25 18:34:01,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 279 flow [2022-11-25 18:34:01,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:34:01,290 INFO L231 Difference]: Finished difference. Result has 33 places, 35 transitions, 144 flow [2022-11-25 18:34:01,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=33, PETRI_TRANSITIONS=35} [2022-11-25 18:34:01,291 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2022-11-25 18:34:01,291 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 35 transitions, 144 flow [2022-11-25 18:34:01,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:01,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:01,293 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] [2022-11-25 18:34:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:34:01,293 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 1 more)] === [2022-11-25 18:34:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1797368138, now seen corresponding path program 1 times [2022-11-25 18:34:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534723779] [2022-11-25 18:34:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:01,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:01,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534723779] [2022-11-25 18:34:01,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534723779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:01,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:01,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:34:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795838009] [2022-11-25 18:34:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:34:01,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:34:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:01,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 558 [2022-11-25 18:34:01,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 35 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:01,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:01,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 558 [2022-11-25 18:34:01,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:02,028 INFO L130 PetriNetUnfolder]: 275/455 cut-off events. [2022-11-25 18:34:02,029 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2022-11-25 18:34:02,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 455 events. 275/455 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1430 event pairs, 114 based on Foata normal form. 44/498 useless extension candidates. Maximal degree in co-relation 1079. Up to 267 conditions per place. [2022-11-25 18:34:02,040 INFO L137 encePairwiseOnDemand]: 555/558 looper letters, 55 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2022-11-25 18:34:02,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 58 transitions, 317 flow [2022-11-25 18:34:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:34:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:34:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2022-11-25 18:34:02,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4224910394265233 [2022-11-25 18:34:02,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2022-11-25 18:34:02,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2022-11-25 18:34:02,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:02,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2022-11-25 18:34:02,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 558.0) internal successors, (2790), 5 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 558.0) internal successors, (2790), 5 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,068 INFO L175 Difference]: Start difference. First operand has 33 places, 35 transitions, 144 flow. Second operand 4 states and 943 transitions. [2022-11-25 18:34:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 58 transitions, 317 flow [2022-11-25 18:34:02,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 309 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:02,071 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 147 flow [2022-11-25 18:34:02,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2022-11-25 18:34:02,072 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-11-25 18:34:02,073 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 147 flow [2022-11-25 18:34:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:02,074 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] [2022-11-25 18:34:02,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:34:02,075 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 1 more)] === [2022-11-25 18:34:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2082341371, now seen corresponding path program 1 times [2022-11-25 18:34:02,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:02,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637697128] [2022-11-25 18:34:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:02,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637697128] [2022-11-25 18:34:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637697128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:02,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:02,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664670879] [2022-11-25 18:34:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:02,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:34:02,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:02,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:34:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:34:02,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 558 [2022-11-25 18:34:02,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:02,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 558 [2022-11-25 18:34:02,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:02,831 INFO L130 PetriNetUnfolder]: 351/619 cut-off events. [2022-11-25 18:34:02,831 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-25 18:34:02,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 619 events. 351/619 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2321 event pairs, 260 based on Foata normal form. 28/645 useless extension candidates. Maximal degree in co-relation 1130. Up to 454 conditions per place. [2022-11-25 18:34:02,834 INFO L137 encePairwiseOnDemand]: 551/558 looper letters, 32 selfloop transitions, 2 changer transitions 37/71 dead transitions. [2022-11-25 18:34:02,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 71 transitions, 396 flow [2022-11-25 18:34:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:34:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:34:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1210 transitions. [2022-11-25 18:34:02,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2022-11-25 18:34:02,839 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1210 transitions. [2022-11-25 18:34:02,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1210 transitions. [2022-11-25 18:34:02,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:02,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1210 transitions. [2022-11-25 18:34:02,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 558.0) internal successors, (3348), 6 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 558.0) internal successors, (3348), 6 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,851 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 147 flow. Second operand 5 states and 1210 transitions. [2022-11-25 18:34:02,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 71 transitions, 396 flow [2022-11-25 18:34:02,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 71 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:34:02,858 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 155 flow [2022-11-25 18:34:02,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2022-11-25 18:34:02,860 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2022-11-25 18:34:02,860 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 155 flow [2022-11-25 18:34:02,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:02,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:02,861 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] [2022-11-25 18:34:02,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:34:02,862 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 1 more)] === [2022-11-25 18:34:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2019787013, now seen corresponding path program 1 times [2022-11-25 18:34:02,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:02,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279558730] [2022-11-25 18:34:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:02,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:03,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:03,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279558730] [2022-11-25 18:34:03,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279558730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:03,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900789303] [2022-11-25 18:34:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:03,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:03,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:03,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:03,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:34:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:34:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:03,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:03,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900789303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:03,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:03,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 18:34:03,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36190418] [2022-11-25 18:34:03,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:03,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:34:03,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:34:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:34:04,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 558 [2022-11-25 18:34:04,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 155 flow. Second operand has 7 states, 7 states have (on average 245.85714285714286) internal successors, (1721), 7 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:04,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:04,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 558 [2022-11-25 18:34:04,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:04,277 INFO L130 PetriNetUnfolder]: 322/531 cut-off events. [2022-11-25 18:34:04,277 INFO L131 PetriNetUnfolder]: For 241/241 co-relation queries the response was YES. [2022-11-25 18:34:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 531 events. 322/531 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1799 event pairs, 90 based on Foata normal form. 1/531 useless extension candidates. Maximal degree in co-relation 1359. Up to 281 conditions per place. [2022-11-25 18:34:04,281 INFO L137 encePairwiseOnDemand]: 554/558 looper letters, 46 selfloop transitions, 5 changer transitions 3/54 dead transitions. [2022-11-25 18:34:04,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 317 flow [2022-11-25 18:34:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:34:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:34:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 999 transitions. [2022-11-25 18:34:04,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2022-11-25 18:34:04,284 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 999 transitions. [2022-11-25 18:34:04,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 999 transitions. [2022-11-25 18:34:04,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:04,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 999 transitions. [2022-11-25 18:34:04,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:04,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 558.0) internal successors, (2790), 5 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:04,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 558.0) internal successors, (2790), 5 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:04,293 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 155 flow. Second operand 4 states and 999 transitions. [2022-11-25 18:34:04,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 317 flow [2022-11-25 18:34:04,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 299 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 18:34:04,299 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 169 flow [2022-11-25 18:34:04,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2022-11-25 18:34:04,302 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2022-11-25 18:34:04,302 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 169 flow [2022-11-25 18:34:04,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 245.85714285714286) internal successors, (1721), 7 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:04,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:04,304 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:04,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:04,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:04,525 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 1 more)] === [2022-11-25 18:34:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2111783482, now seen corresponding path program 2 times [2022-11-25 18:34:04,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:04,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055796145] [2022-11-25 18:34:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:04,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:05,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:05,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055796145] [2022-11-25 18:34:05,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055796145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879786143] [2022-11-25 18:34:05,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:34:05,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:05,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:34:05,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:34:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:05,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:34:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:05,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:06,157 INFO L321 Elim1Store]: treesize reduction 38, result has 62.4 percent of original size [2022-11-25 18:34:06,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 294 treesize of output 308 [2022-11-25 18:34:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879786143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:06,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:06,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-11-25 18:34:06,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145811218] [2022-11-25 18:34:06,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:34:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:34:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:34:07,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 558 [2022-11-25 18:34:07,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 200.69230769230768) internal successors, (2609), 13 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:07,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:07,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 558 [2022-11-25 18:34:07,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:08,509 INFO L130 PetriNetUnfolder]: 728/1200 cut-off events. [2022-11-25 18:34:08,510 INFO L131 PetriNetUnfolder]: For 906/906 co-relation queries the response was YES. [2022-11-25 18:34:08,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3228 conditions, 1200 events. 728/1200 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5182 event pairs, 156 based on Foata normal form. 58/1256 useless extension candidates. Maximal degree in co-relation 1407. Up to 323 conditions per place. [2022-11-25 18:34:08,517 INFO L137 encePairwiseOnDemand]: 548/558 looper letters, 91 selfloop transitions, 22 changer transitions 34/147 dead transitions. [2022-11-25 18:34:08,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 147 transitions, 800 flow [2022-11-25 18:34:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:34:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:34:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2694 transitions. [2022-11-25 18:34:08,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37138130686517784 [2022-11-25 18:34:08,527 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2694 transitions. [2022-11-25 18:34:08,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2694 transitions. [2022-11-25 18:34:08,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:08,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2694 transitions. [2022-11-25 18:34:08,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 207.23076923076923) internal successors, (2694), 13 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:08,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 558.0) internal successors, (7812), 14 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:08,552 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 558.0) internal successors, (7812), 14 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:08,552 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 169 flow. Second operand 13 states and 2694 transitions. [2022-11-25 18:34:08,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 147 transitions, 800 flow [2022-11-25 18:34:08,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 147 transitions, 785 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 18:34:08,558 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 312 flow [2022-11-25 18:34:08,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=312, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2022-11-25 18:34:08,561 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2022-11-25 18:34:08,562 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 312 flow [2022-11-25 18:34:08,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.69230769230768) internal successors, (2609), 13 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:08,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:08,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:08,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:08,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:08,771 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 1 more)] === [2022-11-25 18:34:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1987838250, now seen corresponding path program 1 times [2022-11-25 18:34:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999084425] [2022-11-25 18:34:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:09,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999084425] [2022-11-25 18:34:09,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999084425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:09,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243530015] [2022-11-25 18:34:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:09,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:09,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:34:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:10,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:34:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:10,198 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 [2022-11-25 18:34:10,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:34:10,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:34:10,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:34:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:10,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:14,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:14,544 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 61 treesize of output 50 [2022-11-25 18:34:14,563 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 18:34:14,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 398 treesize of output 373 [2022-11-25 18:34:14,578 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 18:34:14,578 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 366 treesize of output 318 [2022-11-25 18:34:14,596 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 18:34:14,596 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 318 treesize of output 222 [2022-11-25 18:34:14,611 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 18:34:14,612 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 122 treesize of output 98 [2022-11-25 18:34:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:14,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243530015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:14,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:14,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2022-11-25 18:34:14,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299219668] [2022-11-25 18:34:14,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:14,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:34:14,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:34:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=366, Unknown=11, NotChecked=0, Total=506 [2022-11-25 18:34:16,823 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] [2022-11-25 18:34:19,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:21,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:23,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:26,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:28,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:30,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:30,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 558 [2022-11-25 18:34:30,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 312 flow. Second operand has 23 states, 23 states have (on average 153.8695652173913) internal successors, (3539), 23 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:30,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:30,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 558 [2022-11-25 18:34:30,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:35,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:38,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:41,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:43,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:45,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:47,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:34:47,956 INFO L130 PetriNetUnfolder]: 1376/2322 cut-off events. [2022-11-25 18:34:47,956 INFO L131 PetriNetUnfolder]: For 2278/2278 co-relation queries the response was YES. [2022-11-25 18:34:47,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6852 conditions, 2322 events. 1376/2322 cut-off events. For 2278/2278 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12094 event pairs, 349 based on Foata normal form. 5/2323 useless extension candidates. Maximal degree in co-relation 5750. Up to 985 conditions per place. [2022-11-25 18:34:47,972 INFO L137 encePairwiseOnDemand]: 544/558 looper letters, 102 selfloop transitions, 41 changer transitions 39/182 dead transitions. [2022-11-25 18:34:47,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 182 transitions, 1207 flow [2022-11-25 18:34:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:34:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:34:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2867 transitions. [2022-11-25 18:34:47,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28544404619673436 [2022-11-25 18:34:47,983 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2867 transitions. [2022-11-25 18:34:47,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2867 transitions. [2022-11-25 18:34:47,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:47,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2867 transitions. [2022-11-25 18:34:47,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 159.27777777777777) internal successors, (2867), 18 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:48,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 558.0) internal successors, (10602), 19 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:48,013 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 558.0) internal successors, (10602), 19 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:48,013 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 312 flow. Second operand 18 states and 2867 transitions. [2022-11-25 18:34:48,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 182 transitions, 1207 flow [2022-11-25 18:34:48,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 182 transitions, 1155 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:48,027 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 703 flow [2022-11-25 18:34:48,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=703, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2022-11-25 18:34:48,029 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2022-11-25 18:34:48,029 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 703 flow [2022-11-25 18:34:48,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 153.8695652173913) internal successors, (3539), 23 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:48,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:48,031 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] [2022-11-25 18:34:48,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:48,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:48,239 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 1 more)] === [2022-11-25 18:34:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1224526854, now seen corresponding path program 1 times [2022-11-25 18:34:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:48,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719311419] [2022-11-25 18:34:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:48,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:34:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719311419] [2022-11-25 18:34:48,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719311419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:48,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192191310] [2022-11-25 18:34:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:48,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:48,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:48,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:34:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:49,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:34:49,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:34:49,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:50,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:50,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 513 treesize of output 548 [2022-11-25 18:34:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:34:51,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192191310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:51,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:51,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-25 18:34:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857232133] [2022-11-25 18:34:51,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:51,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:34:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:34:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:34:51,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 558 [2022-11-25 18:34:51,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 703 flow. Second operand has 9 states, 9 states have (on average 215.11111111111111) internal successors, (1936), 9 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:51,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:51,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 558 [2022-11-25 18:34:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:52,811 INFO L130 PetriNetUnfolder]: 1380/2382 cut-off events. [2022-11-25 18:34:52,812 INFO L131 PetriNetUnfolder]: For 5634/5634 co-relation queries the response was YES. [2022-11-25 18:34:52,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8174 conditions, 2382 events. 1380/2382 cut-off events. For 5634/5634 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12611 event pairs, 613 based on Foata normal form. 84/2462 useless extension candidates. Maximal degree in co-relation 7604. Up to 1167 conditions per place. [2022-11-25 18:34:52,830 INFO L137 encePairwiseOnDemand]: 554/558 looper letters, 94 selfloop transitions, 15 changer transitions 6/115 dead transitions. [2022-11-25 18:34:52,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 1049 flow [2022-11-25 18:34:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:34:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:34:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1112 transitions. [2022-11-25 18:34:52,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3985663082437276 [2022-11-25 18:34:52,835 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1112 transitions. [2022-11-25 18:34:52,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1112 transitions. [2022-11-25 18:34:52,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:52,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1112 transitions. [2022-11-25 18:34:52,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:52,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 558.0) internal successors, (3348), 6 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:52,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 558.0) internal successors, (3348), 6 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:52,845 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 703 flow. Second operand 5 states and 1112 transitions. [2022-11-25 18:34:52,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 1049 flow [2022-11-25 18:34:52,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 115 transitions, 1015 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:52,886 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 721 flow [2022-11-25 18:34:52,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=721, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2022-11-25 18:34:52,890 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2022-11-25 18:34:52,890 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 721 flow [2022-11-25 18:34:52,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 215.11111111111111) internal successors, (1936), 9 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:52,891 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:52,891 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:52,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:53,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:53,099 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 1 more)] === [2022-11-25 18:34:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1702259597, now seen corresponding path program 2 times [2022-11-25 18:34:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:53,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503958958] [2022-11-25 18:34:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:34:53,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503958958] [2022-11-25 18:34:53,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503958958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400011063] [2022-11-25 18:34:53,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:34:53,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:53,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:53,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:34:53,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:34:53,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:34:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:34:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:55,329 INFO L321 Elim1Store]: treesize reduction 114, result has 57.0 percent of original size [2022-11-25 18:34:55,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 606 treesize of output 660 [2022-11-25 18:35:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:35:02,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400011063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:02,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:02,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-25 18:35:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345313253] [2022-11-25 18:35:02,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:35:02,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:35:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:35:03,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 558 [2022-11-25 18:35:03,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 721 flow. Second operand has 13 states, 13 states have (on average 192.84615384615384) internal successors, (2507), 13 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:03,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:03,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 558 [2022-11-25 18:35:03,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:05,107 INFO L130 PetriNetUnfolder]: 1720/3015 cut-off events. [2022-11-25 18:35:05,108 INFO L131 PetriNetUnfolder]: For 7461/7461 co-relation queries the response was YES. [2022-11-25 18:35:05,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10283 conditions, 3015 events. 1720/3015 cut-off events. For 7461/7461 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17353 event pairs, 453 based on Foata normal form. 56/3067 useless extension candidates. Maximal degree in co-relation 9973. Up to 724 conditions per place. [2022-11-25 18:35:05,132 INFO L137 encePairwiseOnDemand]: 549/558 looper letters, 91 selfloop transitions, 38 changer transitions 35/164 dead transitions. [2022-11-25 18:35:05,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 164 transitions, 1408 flow [2022-11-25 18:35:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:35:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:35:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2379 transitions. [2022-11-25 18:35:05,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35528673835125446 [2022-11-25 18:35:05,142 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2379 transitions. [2022-11-25 18:35:05,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2379 transitions. [2022-11-25 18:35:05,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:05,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2379 transitions. [2022-11-25 18:35:05,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.25) internal successors, (2379), 12 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:05,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 558.0) internal successors, (7254), 13 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:05,163 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 558.0) internal successors, (7254), 13 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:05,163 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 721 flow. Second operand 12 states and 2379 transitions. [2022-11-25 18:35:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 164 transitions, 1408 flow [2022-11-25 18:35:05,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 164 transitions, 1389 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:35:05,207 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 776 flow [2022-11-25 18:35:05,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=776, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2022-11-25 18:35:05,208 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2022-11-25 18:35:05,209 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 776 flow [2022-11-25 18:35:05,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 192.84615384615384) internal successors, (2507), 13 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:05,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:05,210 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:05,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:35:05,418 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 1 more)] === [2022-11-25 18:35:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash 683566494, now seen corresponding path program 1 times [2022-11-25 18:35:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:05,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716894163] [2022-11-25 18:35:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:35:06,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716894163] [2022-11-25 18:35:06,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716894163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030506705] [2022-11-25 18:35:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:06,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:06,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:06,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:06,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:35:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:35:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:35:07,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:08,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:08,474 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 356 treesize of output 468 [2022-11-25 18:35:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:35:14,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030506705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:14,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:14,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 13 [2022-11-25 18:35:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145835129] [2022-11-25 18:35:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:14,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:35:14,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:35:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:35:15,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 558 [2022-11-25 18:35:15,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 776 flow. Second operand has 15 states, 15 states have (on average 200.73333333333332) internal successors, (3011), 15 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:15,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:15,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 558 [2022-11-25 18:35:15,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:17,444 INFO L130 PetriNetUnfolder]: 1992/3475 cut-off events. [2022-11-25 18:35:17,445 INFO L131 PetriNetUnfolder]: For 9542/9542 co-relation queries the response was YES. [2022-11-25 18:35:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12205 conditions, 3475 events. 1992/3475 cut-off events. For 9542/9542 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20599 event pairs, 535 based on Foata normal form. 6/3474 useless extension candidates. Maximal degree in co-relation 12124. Up to 970 conditions per place. [2022-11-25 18:35:17,485 INFO L137 encePairwiseOnDemand]: 548/558 looper letters, 104 selfloop transitions, 62 changer transitions 73/239 dead transitions. [2022-11-25 18:35:17,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 239 transitions, 1955 flow [2022-11-25 18:35:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:35:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:35:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3332 transitions. [2022-11-25 18:35:17,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3732078853046595 [2022-11-25 18:35:17,509 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3332 transitions. [2022-11-25 18:35:17,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3332 transitions. [2022-11-25 18:35:17,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:17,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3332 transitions. [2022-11-25 18:35:17,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 208.25) internal successors, (3332), 16 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) [2022-11-25 18:35:17,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 558.0) internal successors, (9486), 17 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:17,543 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 558.0) internal successors, (9486), 17 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:17,543 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 776 flow. Second operand 16 states and 3332 transitions. [2022-11-25 18:35:17,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 239 transitions, 1955 flow [2022-11-25 18:35:17,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 239 transitions, 1843 flow, removed 19 selfloop flow, removed 8 redundant places. [2022-11-25 18:35:17,592 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 1069 flow [2022-11-25 18:35:17,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1069, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2022-11-25 18:35:17,594 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2022-11-25 18:35:17,595 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 1069 flow [2022-11-25 18:35:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 200.73333333333332) internal successors, (3011), 15 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:17,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:17,596 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:17,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:35:17,803 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 1 more)] === [2022-11-25 18:35:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1957936702, now seen corresponding path program 2 times [2022-11-25 18:35:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:17,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857104145] [2022-11-25 18:35:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:35:19,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:19,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857104145] [2022-11-25 18:35:19,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857104145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:19,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382726899] [2022-11-25 18:35:19,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:35:19,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:19,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:19,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:35:19,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:35:19,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:35:19,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:35:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:35:19,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:24,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 464 treesize of output 854 [2022-11-25 18:35:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:35:46,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382726899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:35:46,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:35:46,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 17 [2022-11-25 18:35:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8368782] [2022-11-25 18:35:46,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:46,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:35:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:35:46,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:35:48,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 558 [2022-11-25 18:35:48,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 1069 flow. Second operand has 18 states, 18 states have (on average 188.77777777777777) internal successors, (3398), 18 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:48,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:48,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 558 [2022-11-25 18:35:48,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:54,804 INFO L130 PetriNetUnfolder]: 3870/6507 cut-off events. [2022-11-25 18:35:54,805 INFO L131 PetriNetUnfolder]: For 20153/20153 co-relation queries the response was YES. [2022-11-25 18:35:54,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24064 conditions, 6507 events. 3870/6507 cut-off events. For 20153/20153 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 40538 event pairs, 734 based on Foata normal form. 78/6585 useless extension candidates. Maximal degree in co-relation 19605. Up to 1178 conditions per place. [2022-11-25 18:35:54,869 INFO L137 encePairwiseOnDemand]: 549/558 looper letters, 218 selfloop transitions, 122 changer transitions 42/382 dead transitions. [2022-11-25 18:35:54,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 382 transitions, 3407 flow [2022-11-25 18:35:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 18:35:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 18:35:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5111 transitions. [2022-11-25 18:35:54,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3522883926109733 [2022-11-25 18:35:54,885 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5111 transitions. [2022-11-25 18:35:54,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5111 transitions. [2022-11-25 18:35:54,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:54,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5111 transitions. [2022-11-25 18:35:54,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 196.57692307692307) internal successors, (5111), 26 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:54,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 558.0) internal successors, (15066), 27 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:54,922 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 558.0) internal successors, (15066), 27 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:54,923 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 1069 flow. Second operand 26 states and 5111 transitions. [2022-11-25 18:35:54,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 382 transitions, 3407 flow [2022-11-25 18:35:55,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 382 transitions, 3301 flow, removed 25 selfloop flow, removed 5 redundant places. [2022-11-25 18:35:55,107 INFO L231 Difference]: Finished difference. Result has 121 places, 166 transitions, 2164 flow [2022-11-25 18:35:55,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2164, PETRI_PLACES=121, PETRI_TRANSITIONS=166} [2022-11-25 18:35:55,108 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2022-11-25 18:35:55,108 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 166 transitions, 2164 flow [2022-11-25 18:35:55,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 188.77777777777777) internal successors, (3398), 18 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:35:55,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:55,110 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:55,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:35:55,318 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 1 more)] === [2022-11-25 18:35:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2114711377, now seen corresponding path program 1 times [2022-11-25 18:35:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:55,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544102057] [2022-11-25 18:35:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:55,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:35:55,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:55,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544102057] [2022-11-25 18:35:55,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544102057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376661140] [2022-11-25 18:35:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:35:55,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:35:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:35:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:56,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:35:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:35:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:35:56,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:58,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:35:58,318 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 460 treesize of output 567 [2022-11-25 18:36:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:36:01,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376661140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:36:01,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:36:01,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-25 18:36:01,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594313012] [2022-11-25 18:36:01,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:36:01,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:36:01,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:36:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:36:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:36:02,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 558 [2022-11-25 18:36:02,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 166 transitions, 2164 flow. Second operand has 15 states, 15 states have (on average 193.53333333333333) internal successors, (2903), 15 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:36:02,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:36:02,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 558 [2022-11-25 18:36:02,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:36:05,049 INFO L130 PetriNetUnfolder]: 3599/6208 cut-off events. [2022-11-25 18:36:05,049 INFO L131 PetriNetUnfolder]: For 25330/25330 co-relation queries the response was YES. [2022-11-25 18:36:05,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23182 conditions, 6208 events. 3599/6208 cut-off events. For 25330/25330 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 39344 event pairs, 886 based on Foata normal form. 266/6474 useless extension candidates. Maximal degree in co-relation 22928. Up to 1120 conditions per place. [2022-11-25 18:36:05,106 INFO L137 encePairwiseOnDemand]: 552/558 looper letters, 171 selfloop transitions, 54 changer transitions 57/282 dead transitions. [2022-11-25 18:36:05,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 282 transitions, 3163 flow [2022-11-25 18:36:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:36:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:36:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2997 transitions. [2022-11-25 18:36:05,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2022-11-25 18:36:05,117 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2997 transitions. [2022-11-25 18:36:05,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2997 transitions. [2022-11-25 18:36:05,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:36:05,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2997 transitions. [2022-11-25 18:36:05,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 199.8) internal successors, (2997), 15 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:36:05,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 558.0) internal successors, (8928), 16 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:36:05,144 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 558.0) internal successors, (8928), 16 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:36:05,144 INFO L175 Difference]: Start difference. First operand has 121 places, 166 transitions, 2164 flow. Second operand 15 states and 2997 transitions. [2022-11-25 18:36:05,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 282 transitions, 3163 flow [2022-11-25 18:36:05,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 282 transitions, 2776 flow, removed 153 selfloop flow, removed 7 redundant places. [2022-11-25 18:36:05,351 INFO L231 Difference]: Finished difference. Result has 124 places, 132 transitions, 1565 flow [2022-11-25 18:36:05,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1565, PETRI_PLACES=124, PETRI_TRANSITIONS=132} [2022-11-25 18:36:05,352 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2022-11-25 18:36:05,353 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 132 transitions, 1565 flow [2022-11-25 18:36:05,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 193.53333333333333) internal successors, (2903), 15 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:36:05,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:36:05,354 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:36:05,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:36:05,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:36:05,562 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 1 more)] === [2022-11-25 18:36:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:36:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash 447354613, now seen corresponding path program 1 times [2022-11-25 18:36:05,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:36:05,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227695724] [2022-11-25 18:36:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:36:05,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:36:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:36:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:36:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:36:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227695724] [2022-11-25 18:36:07,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227695724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:36:07,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472794530] [2022-11-25 18:36:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:36:07,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:36:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:36:07,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:36:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:36:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:36:07,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:36:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:36:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:36:08,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:36:11,361 INFO L321 Elim1Store]: treesize reduction 126, result has 74.0 percent of original size [2022-11-25 18:36:11,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 915 treesize of output 1096 [2022-11-25 18:38:11,883 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:38:27,289 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:40:31,959 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:38,914 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:39,292 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:40,160 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:42:04,981 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:42:09,005 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:42:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:42:29,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472794530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:42:29,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:42:29,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2022-11-25 18:42:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779006797] [2022-11-25 18:42:29,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:42:29,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:42:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:42:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:42:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:42:31,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 558 [2022-11-25 18:42:31,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 132 transitions, 1565 flow. Second operand has 24 states, 24 states have (on average 178.83333333333334) internal successors, (4292), 24 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:31,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:42:31,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 558 [2022-11-25 18:42:31,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:42:34,518 INFO L130 PetriNetUnfolder]: 3371/5698 cut-off events. [2022-11-25 18:42:34,519 INFO L131 PetriNetUnfolder]: For 20122/20122 co-relation queries the response was YES. [2022-11-25 18:42:34,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21018 conditions, 5698 events. 3371/5698 cut-off events. For 20122/20122 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 34788 event pairs, 692 based on Foata normal form. 8/5706 useless extension candidates. Maximal degree in co-relation 20281. Up to 2241 conditions per place. [2022-11-25 18:42:34,558 INFO L137 encePairwiseOnDemand]: 548/558 looper letters, 109 selfloop transitions, 72 changer transitions 54/235 dead transitions. [2022-11-25 18:42:34,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 2413 flow [2022-11-25 18:42:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:42:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:42:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3136 transitions. [2022-11-25 18:42:34,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33059245203457727 [2022-11-25 18:42:34,565 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3136 transitions. [2022-11-25 18:42:34,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3136 transitions. [2022-11-25 18:42:34,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:42:34,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3136 transitions. [2022-11-25 18:42:34,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.47058823529412) internal successors, (3136), 17 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:34,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 558.0) internal successors, (10044), 18 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:34,581 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 558.0) internal successors, (10044), 18 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:34,582 INFO L175 Difference]: Start difference. First operand has 124 places, 132 transitions, 1565 flow. Second operand 17 states and 3136 transitions. [2022-11-25 18:42:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 2413 flow [2022-11-25 18:42:34,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 235 transitions, 2240 flow, removed 34 selfloop flow, removed 12 redundant places. [2022-11-25 18:42:34,716 INFO L231 Difference]: Finished difference. Result has 129 places, 140 transitions, 1692 flow [2022-11-25 18:42:34,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1692, PETRI_PLACES=129, PETRI_TRANSITIONS=140} [2022-11-25 18:42:34,718 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2022-11-25 18:42:34,718 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 140 transitions, 1692 flow [2022-11-25 18:42:34,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 178.83333333333334) internal successors, (4292), 24 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:34,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:42:34,719 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:42:34,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:42:34,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:42:34,927 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 1 more)] === [2022-11-25 18:42:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:42:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 224912629, now seen corresponding path program 2 times [2022-11-25 18:42:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:42:34,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827073348] [2022-11-25 18:42:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:42:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:42:35,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:42:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827073348] [2022-11-25 18:42:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827073348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:42:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133587193] [2022-11-25 18:42:35,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:42:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:42:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:42:35,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:42:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:42:35,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:42:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:42:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:42:35,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:42:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:42:36,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:42:36,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:42:36,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 255 treesize of output 265 [2022-11-25 18:42:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:42:37,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133587193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:42:37,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:42:37,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-25 18:42:37,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799892752] [2022-11-25 18:42:37,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:42:37,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:42:37,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:42:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:42:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:42:37,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 558 [2022-11-25 18:42:37,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 140 transitions, 1692 flow. Second operand has 16 states, 16 states have (on average 195.5625) internal successors, (3129), 16 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:37,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:42:37,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 558 [2022-11-25 18:42:37,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:42:39,243 INFO L130 PetriNetUnfolder]: 2901/5021 cut-off events. [2022-11-25 18:42:39,243 INFO L131 PetriNetUnfolder]: For 18301/18301 co-relation queries the response was YES. [2022-11-25 18:42:39,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17971 conditions, 5021 events. 2901/5021 cut-off events. For 18301/18301 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 31236 event pairs, 1722 based on Foata normal form. 120/5141 useless extension candidates. Maximal degree in co-relation 17105. Up to 3195 conditions per place. [2022-11-25 18:42:39,270 INFO L137 encePairwiseOnDemand]: 552/558 looper letters, 153 selfloop transitions, 20 changer transitions 31/204 dead transitions. [2022-11-25 18:42:39,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 204 transitions, 2328 flow [2022-11-25 18:42:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:42:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:42:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2014 transitions. [2022-11-25 18:42:39,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36093189964157707 [2022-11-25 18:42:39,275 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2014 transitions. [2022-11-25 18:42:39,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2014 transitions. [2022-11-25 18:42:39,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:42:39,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2014 transitions. [2022-11-25 18:42:39,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 201.4) internal successors, (2014), 10 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:39,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 558.0) internal successors, (6138), 11 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:39,285 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 558.0) internal successors, (6138), 11 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:39,285 INFO L175 Difference]: Start difference. First operand has 129 places, 140 transitions, 1692 flow. Second operand 10 states and 2014 transitions. [2022-11-25 18:42:39,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 204 transitions, 2328 flow [2022-11-25 18:42:39,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 204 transitions, 2109 flow, removed 34 selfloop flow, removed 15 redundant places. [2022-11-25 18:42:39,391 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1451 flow [2022-11-25 18:42:39,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1451, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2022-11-25 18:42:39,392 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2022-11-25 18:42:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1451 flow [2022-11-25 18:42:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 195.5625) internal successors, (3129), 16 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:42:39,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:42:39,394 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:42:39,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:42:39,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:42:39,612 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 1 more)] === [2022-11-25 18:42:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:42:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash -149568113, now seen corresponding path program 1 times [2022-11-25 18:42:39,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:42:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392516103] [2022-11-25 18:42:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:39,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:42:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:42:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:42:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392516103] [2022-11-25 18:42:40,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392516103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:42:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758972043] [2022-11-25 18:42:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:40,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:42:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:42:40,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:42:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:42:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:42:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:42:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:42:41,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:42:44,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:42:44,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 602 treesize of output 1249 [2022-11-25 18:43:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:43:01,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758972043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:43:01,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:43:01,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-25 18:43:01,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979482292] [2022-11-25 18:43:01,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:43:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:43:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:43:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:43:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:43:02,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 558 [2022-11-25 18:43:02,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1451 flow. Second operand has 15 states, 15 states have (on average 202.86666666666667) internal successors, (3043), 15 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:02,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:43:02,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 558 [2022-11-25 18:43:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:43:07,511 INFO L130 PetriNetUnfolder]: 2789/4910 cut-off events. [2022-11-25 18:43:07,512 INFO L131 PetriNetUnfolder]: For 18056/18056 co-relation queries the response was YES. [2022-11-25 18:43:07,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16512 conditions, 4910 events. 2789/4910 cut-off events. For 18056/18056 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30505 event pairs, 726 based on Foata normal form. 126/5036 useless extension candidates. Maximal degree in co-relation 15699. Up to 1114 conditions per place. [2022-11-25 18:43:07,547 INFO L137 encePairwiseOnDemand]: 554/558 looper letters, 107 selfloop transitions, 45 changer transitions 22/174 dead transitions. [2022-11-25 18:43:07,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1902 flow [2022-11-25 18:43:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:43:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:43:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1674 transitions. [2022-11-25 18:43:07,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.375 [2022-11-25 18:43:07,551 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1674 transitions. [2022-11-25 18:43:07,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1674 transitions. [2022-11-25 18:43:07,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:43:07,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1674 transitions. [2022-11-25 18:43:07,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 209.25) internal successors, (1674), 8 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:07,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 558.0) internal successors, (5022), 9 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:07,560 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 558.0) internal successors, (5022), 9 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:07,560 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1451 flow. Second operand 8 states and 1674 transitions. [2022-11-25 18:43:07,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1902 flow [2022-11-25 18:43:07,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 174 transitions, 1847 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-11-25 18:43:07,654 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 1394 flow [2022-11-25 18:43:07,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2022-11-25 18:43:07,655 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2022-11-25 18:43:07,655 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 1394 flow [2022-11-25 18:43:07,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 202.86666666666667) internal successors, (3043), 15 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:07,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:43:07,655 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:43:07,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:43:07,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:43:07,859 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:43:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:43:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 795568027, now seen corresponding path program 3 times [2022-11-25 18:43:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:43:07,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277827598] [2022-11-25 18:43:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:43:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:43:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:43:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:43:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:43:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277827598] [2022-11-25 18:43:08,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277827598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:43:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164159604] [2022-11-25 18:43:08,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:43:08,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:43:08,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:43:08,959 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:43:08,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:43:09,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:43:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:43:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:43:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:43:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:43:10,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:43:12,499 INFO L321 Elim1Store]: treesize reduction 38, result has 89.4 percent of original size [2022-11-25 18:43:12,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 789 treesize of output 954 [2022-11-25 18:43:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:43:18,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164159604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:43:18,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:43:18,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 18:43:18,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746459761] [2022-11-25 18:43:18,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:43:18,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 18:43:18,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:43:18,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 18:43:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:43:20,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 558 [2022-11-25 18:43:20,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 1394 flow. Second operand has 25 states, 25 states have (on average 184.64) internal successors, (4616), 25 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:20,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:43:20,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 558 [2022-11-25 18:43:20,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:43:23,523 INFO L130 PetriNetUnfolder]: 4025/6972 cut-off events. [2022-11-25 18:43:23,523 INFO L131 PetriNetUnfolder]: For 23910/23910 co-relation queries the response was YES. [2022-11-25 18:43:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24413 conditions, 6972 events. 4025/6972 cut-off events. For 23910/23910 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 45037 event pairs, 1430 based on Foata normal form. 72/7044 useless extension candidates. Maximal degree in co-relation 22659. Up to 1989 conditions per place. [2022-11-25 18:43:23,560 INFO L137 encePairwiseOnDemand]: 550/558 looper letters, 175 selfloop transitions, 66 changer transitions 51/292 dead transitions. [2022-11-25 18:43:23,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 292 transitions, 2982 flow [2022-11-25 18:43:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:43:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:43:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3824 transitions. [2022-11-25 18:43:23,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3426523297491039 [2022-11-25 18:43:23,568 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3824 transitions. [2022-11-25 18:43:23,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3824 transitions. [2022-11-25 18:43:23,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:43:23,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3824 transitions. [2022-11-25 18:43:23,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 191.2) internal successors, (3824), 20 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:23,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 558.0) internal successors, (11718), 21 states have internal predecessors, (11718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:23,587 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 558.0) internal successors, (11718), 21 states have internal predecessors, (11718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:23,587 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 1394 flow. Second operand 20 states and 3824 transitions. [2022-11-25 18:43:23,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 292 transitions, 2982 flow [2022-11-25 18:43:23,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 292 transitions, 2860 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-11-25 18:43:23,682 INFO L231 Difference]: Finished difference. Result has 140 places, 144 transitions, 1758 flow [2022-11-25 18:43:23,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1758, PETRI_PLACES=140, PETRI_TRANSITIONS=144} [2022-11-25 18:43:23,683 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2022-11-25 18:43:23,683 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 144 transitions, 1758 flow [2022-11-25 18:43:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 184.64) internal successors, (4616), 25 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:43:23,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:43:23,684 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:43:23,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:43:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:43:23,891 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:43:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:43:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1440328322, now seen corresponding path program 4 times [2022-11-25 18:43:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:43:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419511637] [2022-11-25 18:43:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:43:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:43:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:43:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:43:26,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:43:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419511637] [2022-11-25 18:43:26,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419511637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:43:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253315335] [2022-11-25 18:43:26,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:43:26,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:43:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:43:26,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:43:26,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fd2e3fe-4d2d-4ab8-b3fb-55dad94f1fb5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:43:26,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:43:26,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:43:26,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 18:43:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:43:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:43:28,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:43:49,091 WARN L233 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 720 DAG size of output: 612 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 18:43:49,096 INFO L321 Elim1Store]: treesize reduction 540, result has 81.3 percent of original size [2022-11-25 18:43:49,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 1108 treesize of output 3111