./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:32:36,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:32:36,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:32:36,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:32:36,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:32:36,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:32:36,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:32:36,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:32:36,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:32:36,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:32:36,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:32:36,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:32:36,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:32:36,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:32:36,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:32:36,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:32:36,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:32:36,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:32:36,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:32:36,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:32:36,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:32:36,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:32:36,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:32:36,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:32:36,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:32:36,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:32:36,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:32:36,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:32:36,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:32:36,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:32:36,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:32:36,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:32:36,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:32:36,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:32:36,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:32:36,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:32:36,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:32:36,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:32:36,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:32:36,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:32:36,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:32:36,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:32:36,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:32:36,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:32:36,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:32:36,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:32:36,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:32:36,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:32:36,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:32:36,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:32:36,953 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:32:36,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:32:36,953 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:32:36,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:32:36,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:32:36,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:32:36,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:32:36,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:32:36,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:32:36,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:32:36,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:32:36,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:32:36,956 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:32:36,957 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_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-12-13 15:32:37,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:32:37,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:32:37,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:32:37,139 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:32:37,140 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:32:37,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-12-13 15:32:39,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:32:39,881 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:32:39,882 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-12-13 15:32:39,888 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/data/7018787ed/857030f0b6ae4f5d9c7f44681fde2d7f/FLAG4e89c998e [2022-12-13 15:32:40,275 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/data/7018787ed/857030f0b6ae4f5d9c7f44681fde2d7f [2022-12-13 15:32:40,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:32:40,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:32:40,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:32:40,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:32:40,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:32:40,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c0c5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40, skipping insertion in model container [2022-12-13 15:32:40,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:32:40,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:32:40,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:32:40,420 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:32:40,422 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:32:40,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:32:40,424 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:32:40,425 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:32:40,431 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_64998c85-d8bf-4f60-8ae2-95d9e297e716/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-12-13 15:32:40,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:32:40,444 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:32:40,454 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:32:40,454 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:32:40,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:32:40,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:32:40,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:32:40,457 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:32:40,460 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_64998c85-d8bf-4f60-8ae2-95d9e297e716/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-12-13 15:32:40,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:32:40,472 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:32:40,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40 WrapperNode [2022-12-13 15:32:40,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:32:40,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:32:40,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:32:40,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:32:40,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,501 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-12-13 15:32:40,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:32:40,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:32:40,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:32:40,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:32:40,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:32:40,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:32:40,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:32:40,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:32:40,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (1/1) ... [2022-12-13 15:32:40,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:32:40,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:32:40,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:32:40,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:32:40,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:32:40,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:32:40,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:32:40,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:32:40,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:32:40,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:32:40,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:32:40,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:32:40,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:32:40,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:32:40,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:32:40,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:32:40,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:32:40,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:32:40,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:32:40,586 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:32:40,673 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:32:40,675 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:32:40,879 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:32:40,971 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:32:40,971 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 15:32:40,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:32:40 BoogieIcfgContainer [2022-12-13 15:32:40,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:32:40,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:32:40,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:32:40,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:32:40,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:32:40" (1/3) ... [2022-12-13 15:32:40,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543ef0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:32:40, skipping insertion in model container [2022-12-13 15:32:40,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:32:40" (2/3) ... [2022-12-13 15:32:40,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543ef0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:32:40, skipping insertion in model container [2022-12-13 15:32:40,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:32:40" (3/3) ... [2022-12-13 15:32:40,983 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-12-13 15:32:40,993 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:32:41,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:32:41,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:32:41,005 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:32:41,045 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 15:32:41,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-12-13 15:32:41,128 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2022-12-13 15:32:41,128 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:32:41,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-12-13 15:32:41,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-12-13 15:32:41,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-12-13 15:32:41,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:32:41,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 134 transitions, 280 flow [2022-12-13 15:32:41,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 134 transitions, 280 flow [2022-12-13 15:32:41,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 134 transitions, 280 flow [2022-12-13 15:32:41,175 INFO L130 PetriNetUnfolder]: 11/134 cut-off events. [2022-12-13 15:32:41,176 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:32:41,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 75 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-12-13 15:32:41,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2022-12-13 15:32:45,294 INFO L134 LiptonReduction]: Checked pairs total: 849 [2022-12-13 15:32:45,294 INFO L136 LiptonReduction]: Total number of compositions: 148 [2022-12-13 15:32:45,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:32:45,309 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;@e812b19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:32:45,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:32:45,313 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 15:32:45,313 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:32:45,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:45,314 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:45,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1367894053, now seen corresponding path program 1 times [2022-12-13 15:32:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247263349] [2022-12-13 15:32:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:45,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247263349] [2022-12-13 15:32:45,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247263349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:32:45,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:32:45,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:32:45,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591741476] [2022-12-13 15:32:45,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:32:45,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:32:45,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:45,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:32:45,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:32:45,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 293 [2022-12-13 15:32:45,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:45,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:45,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 293 [2022-12-13 15:32:45,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:45,727 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2022-12-13 15:32:45,727 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:32:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 24 based on Foata normal form. 7/73 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2022-12-13 15:32:45,729 INFO L137 encePairwiseOnDemand]: 286/293 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2022-12-13 15:32:45,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2022-12-13 15:32:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:32:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:32:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 519 transitions. [2022-12-13 15:32:45,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44283276450511944 [2022-12-13 15:32:45,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 519 transitions. [2022-12-13 15:32:45,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 519 transitions. [2022-12-13 15:32:45,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:45,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 519 transitions. [2022-12-13 15:32:45,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:45,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:45,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:45,761 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 519 transitions. [2022-12-13 15:32:45,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2022-12-13 15:32:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 15:32:45,765 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2022-12-13 15:32:45,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2022-12-13 15:32:45,769 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-12-13 15:32:45,770 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2022-12-13 15:32:45,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:45,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:45,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:45,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:32:45,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash -611696542, now seen corresponding path program 1 times [2022-12-13 15:32:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:45,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144042320] [2022-12-13 15:32:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:46,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:46,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144042320] [2022-12-13 15:32:46,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144042320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:32:46,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:32:46,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:32:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134183120] [2022-12-13 15:32:46,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:32:46,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:32:46,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:32:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:32:46,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 293 [2022-12-13 15:32:46,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:46,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:46,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 293 [2022-12-13 15:32:46,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:46,556 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2022-12-13 15:32:46,556 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:32:46,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 375 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2022-12-13 15:32:46,557 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2022-12-13 15:32:46,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2022-12-13 15:32:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:32:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:32:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 970 transitions. [2022-12-13 15:32:46,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4138225255972696 [2022-12-13 15:32:46,563 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 970 transitions. [2022-12-13 15:32:46,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 970 transitions. [2022-12-13 15:32:46,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:46,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 970 transitions. [2022-12-13 15:32:46,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.25) internal successors, (970), 8 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:46,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:46,572 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:46,573 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 970 transitions. [2022-12-13 15:32:46,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2022-12-13 15:32:46,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:32:46,575 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2022-12-13 15:32:46,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2022-12-13 15:32:46,575 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-12-13 15:32:46,575 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2022-12-13 15:32:46,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:46,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:46,577 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:46,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:32:46,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:46,577 INFO L85 PathProgramCache]: Analyzing trace with hash -337882434, now seen corresponding path program 2 times [2022-12-13 15:32:46,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:46,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843671353] [2022-12-13 15:32:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:46,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:47,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843671353] [2022-12-13 15:32:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843671353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:32:47,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:32:47,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:32:47,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103234467] [2022-12-13 15:32:47,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:32:47,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:32:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:32:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:32:47,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 293 [2022-12-13 15:32:47,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:47,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 293 [2022-12-13 15:32:47,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:47,243 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2022-12-13 15:32:47,243 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-12-13 15:32:47,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 407 event pairs, 7 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2022-12-13 15:32:47,245 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2022-12-13 15:32:47,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2022-12-13 15:32:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:32:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:32:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 957 transitions. [2022-12-13 15:32:47,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4082764505119454 [2022-12-13 15:32:47,248 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 957 transitions. [2022-12-13 15:32:47,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 957 transitions. [2022-12-13 15:32:47,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:47,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 957 transitions. [2022-12-13 15:32:47,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,257 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,257 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 957 transitions. [2022-12-13 15:32:47,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2022-12-13 15:32:47,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-12-13 15:32:47,260 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2022-12-13 15:32:47,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-13 15:32:47,261 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2022-12-13 15:32:47,261 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2022-12-13 15:32:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:47,263 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:32:47,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1465494050, now seen corresponding path program 3 times [2022-12-13 15:32:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:47,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713295597] [2022-12-13 15:32:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:47,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:47,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713295597] [2022-12-13 15:32:47,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713295597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:32:47,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:32:47,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:32:47,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989006754] [2022-12-13 15:32:47,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:32:47,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:32:47,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:32:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:32:47,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 293 [2022-12-13 15:32:47,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:47,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 293 [2022-12-13 15:32:47,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:47,424 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2022-12-13 15:32:47,424 INFO L131 PetriNetUnfolder]: For 124/126 co-relation queries the response was YES. [2022-12-13 15:32:47,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 124/126 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 299 event pairs, 10 based on Foata normal form. 8/105 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2022-12-13 15:32:47,426 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2022-12-13 15:32:47,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2022-12-13 15:32:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:32:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:32:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2022-12-13 15:32:47,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.447098976109215 [2022-12-13 15:32:47,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2022-12-13 15:32:47,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2022-12-13 15:32:47,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:47,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2022-12-13 15:32:47,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,432 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 393 transitions. [2022-12-13 15:32:47,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2022-12-13 15:32:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-13 15:32:47,434 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2022-12-13 15:32:47,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2022-12-13 15:32:47,435 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-12-13 15:32:47,435 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2022-12-13 15:32:47,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:47,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:47,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:32:47,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash 19555606, now seen corresponding path program 4 times [2022-12-13 15:32:47,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:47,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367529854] [2022-12-13 15:32:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:47,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:47,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367529854] [2022-12-13 15:32:47,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367529854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:32:47,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:32:47,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:32:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862712524] [2022-12-13 15:32:47,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:32:47,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:32:47,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:32:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:32:47,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 293 [2022-12-13 15:32:47,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:47,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:47,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 293 [2022-12-13 15:32:47,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:48,009 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2022-12-13 15:32:48,009 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-12-13 15:32:48,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 350 event pairs, 7 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2022-12-13 15:32:48,011 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2022-12-13 15:32:48,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2022-12-13 15:32:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:32:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:32:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2022-12-13 15:32:48,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4061433447098976 [2022-12-13 15:32:48,013 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2022-12-13 15:32:48,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2022-12-13 15:32:48,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:48,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2022-12-13 15:32:48,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,017 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,017 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 952 transitions. [2022-12-13 15:32:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2022-12-13 15:32:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:32:48,019 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2022-12-13 15:32:48,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-12-13 15:32:48,019 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-12-13 15:32:48,020 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2022-12-13 15:32:48,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:48,020 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:32:48,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1203667190, now seen corresponding path program 1 times [2022-12-13 15:32:48,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129219956] [2022-12-13 15:32:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:48,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:48,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129219956] [2022-12-13 15:32:48,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129219956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:32:48,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:32:48,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:32:48,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353263911] [2022-12-13 15:32:48,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:32:48,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:32:48,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:32:48,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:32:48,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 293 [2022-12-13 15:32:48,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:48,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 293 [2022-12-13 15:32:48,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:48,191 INFO L130 PetriNetUnfolder]: 88/176 cut-off events. [2022-12-13 15:32:48,191 INFO L131 PetriNetUnfolder]: For 177/183 co-relation queries the response was YES. [2022-12-13 15:32:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 176 events. 88/176 cut-off events. For 177/183 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 554 event pairs, 10 based on Foata normal form. 8/150 useless extension candidates. Maximal degree in co-relation 622. Up to 69 conditions per place. [2022-12-13 15:32:48,193 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 33 selfloop transitions, 10 changer transitions 7/52 dead transitions. [2022-12-13 15:32:48,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 365 flow [2022-12-13 15:32:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:32:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:32:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2022-12-13 15:32:48,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46075085324232085 [2022-12-13 15:32:48,196 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2022-12-13 15:32:48,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2022-12-13 15:32:48,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:48,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2022-12-13 15:32:48,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,199 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,199 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 4 states and 540 transitions. [2022-12-13 15:32:48,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 365 flow [2022-12-13 15:32:48,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 333 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-12-13 15:32:48,200 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 200 flow [2022-12-13 15:32:48,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 15:32:48,201 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2022-12-13 15:32:48,201 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 200 flow [2022-12-13 15:32:48,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:48,201 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:32:48,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 664636762, now seen corresponding path program 1 times [2022-12-13 15:32:48,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:48,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361823790] [2022-12-13 15:32:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:48,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:48,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361823790] [2022-12-13 15:32:48,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361823790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:32:48,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370486878] [2022-12-13 15:32:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:48,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:32:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:32:48,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:32:48,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:32:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:32:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:32:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:48,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:32:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:48,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370486878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:32:48,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:32:48,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 15:32:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105289130] [2022-12-13 15:32:48,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:32:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:32:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:32:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:32:48,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 293 [2022-12-13 15:32:48,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 200 flow. Second operand has 12 states, 12 states have (on average 121.25) internal successors, (1455), 12 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:48,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 293 [2022-12-13 15:32:48,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:48,679 INFO L130 PetriNetUnfolder]: 80/173 cut-off events. [2022-12-13 15:32:48,679 INFO L131 PetriNetUnfolder]: For 361/374 co-relation queries the response was YES. [2022-12-13 15:32:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 173 events. 80/173 cut-off events. For 361/374 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 520 event pairs, 37 based on Foata normal form. 15/153 useless extension candidates. Maximal degree in co-relation 584. Up to 135 conditions per place. [2022-12-13 15:32:48,681 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 26 selfloop transitions, 3 changer transitions 16/47 dead transitions. [2022-12-13 15:32:48,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 388 flow [2022-12-13 15:32:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:32:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:32:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 747 transitions. [2022-12-13 15:32:48,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4249146757679181 [2022-12-13 15:32:48,684 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 747 transitions. [2022-12-13 15:32:48,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 747 transitions. [2022-12-13 15:32:48,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:48,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 747 transitions. [2022-12-13 15:32:48,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.5) internal successors, (747), 6 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,690 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,690 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 200 flow. Second operand 6 states and 747 transitions. [2022-12-13 15:32:48,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 388 flow [2022-12-13 15:32:48,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 341 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-12-13 15:32:48,693 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 196 flow [2022-12-13 15:32:48,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-12-13 15:32:48,693 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-12-13 15:32:48,694 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 196 flow [2022-12-13 15:32:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.25) internal successors, (1455), 12 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:48,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:48,694 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:48,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:32:48,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:32:48,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1357167203, now seen corresponding path program 2 times [2022-12-13 15:32:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405995769] [2022-12-13 15:32:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:49,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405995769] [2022-12-13 15:32:49,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405995769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:32:49,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563064635] [2022-12-13 15:32:49,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:32:49,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:32:49,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:32:49,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:32:49,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:32:49,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:32:49,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:32:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 15:32:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:32:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:32:49,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:32:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:49,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:32:50,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:32:50,120 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 45 treesize of output 41 [2022-12-13 15:32:50,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-13 15:32:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563064635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:32:50,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:32:50,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-13 15:32:50,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817937859] [2022-12-13 15:32:50,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:32:50,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:32:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:32:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:32:51,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 293 [2022-12-13 15:32:51,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 196 flow. Second operand has 23 states, 23 states have (on average 104.82608695652173) internal successors, (2411), 23 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:51,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:51,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 293 [2022-12-13 15:32:51,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:52,371 INFO L130 PetriNetUnfolder]: 250/483 cut-off events. [2022-12-13 15:32:52,372 INFO L131 PetriNetUnfolder]: For 584/604 co-relation queries the response was YES. [2022-12-13 15:32:52,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 483 events. 250/483 cut-off events. For 584/604 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2035 event pairs, 24 based on Foata normal form. 8/379 useless extension candidates. Maximal degree in co-relation 1831. Up to 167 conditions per place. [2022-12-13 15:32:52,374 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 92 selfloop transitions, 52 changer transitions 0/146 dead transitions. [2022-12-13 15:32:52,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 146 transitions, 1084 flow [2022-12-13 15:32:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:32:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:32:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2071 transitions. [2022-12-13 15:32:52,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3720136518771331 [2022-12-13 15:32:52,378 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2071 transitions. [2022-12-13 15:32:52,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2071 transitions. [2022-12-13 15:32:52,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:52,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2071 transitions. [2022-12-13 15:32:52,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 109.0) internal successors, (2071), 19 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:52,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 293.0) internal successors, (5860), 20 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:52,388 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 293.0) internal successors, (5860), 20 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:52,388 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 196 flow. Second operand 19 states and 2071 transitions. [2022-12-13 15:32:52,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 146 transitions, 1084 flow [2022-12-13 15:32:52,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 146 transitions, 1022 flow, removed 29 selfloop flow, removed 4 redundant places. [2022-12-13 15:32:52,391 INFO L231 Difference]: Finished difference. Result has 59 places, 89 transitions, 762 flow [2022-12-13 15:32:52,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=762, PETRI_PLACES=59, PETRI_TRANSITIONS=89} [2022-12-13 15:32:52,392 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2022-12-13 15:32:52,392 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 89 transitions, 762 flow [2022-12-13 15:32:52,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 104.82608695652173) internal successors, (2411), 23 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:52,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:52,393 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:52,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:32:52,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:32:52,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:32:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash 730521693, now seen corresponding path program 1 times [2022-12-13 15:32:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:32:52,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13610653] [2022-12-13 15:32:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:52,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:32:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:53,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:32:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13610653] [2022-12-13 15:32:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13610653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:32:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864308414] [2022-12-13 15:32:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:32:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:32:53,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:32:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:32:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:53,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:32:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:32:53,466 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 16 treesize of output 12 [2022-12-13 15:32:53,503 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 15 treesize of output 11 [2022-12-13 15:32:53,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:32:53,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:32:53,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 15:32:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:53,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:32:54,586 WARN L837 $PredicateComparison]: unable to prove that (or (< c_~n~0 (+ 2 c_~q_back~0)) (<= c_~N~0 0) (< c_~q_back~0 0) (< 1 c_~N~0) (let ((.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0)))) (and (forall ((v_ArrVal_193 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) c_~q~0.base))) (or (not (= (select .cse0 .cse1) 1)) (= c_~N~0 (select .cse0 (+ (* c_~q_front~0 4) c_~q~0.offset)))))) (or (forall ((~C~0 Int)) (let ((.cse2 (* 2 ~C~0))) (= (mod (+ c_~x~0 .cse2) 4294967296) (mod (+ c_~y~0 .cse2) 4294967296)))) (forall ((v_ArrVal_193 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) c_~q~0.base) .cse1) 1))))))) is different from false [2022-12-13 15:32:54,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:32:54,962 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 2 case distinctions, treesize of input 76 treesize of output 61 [2022-12-13 15:32:54,972 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-13 15:32:54,972 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 300 treesize of output 275 [2022-12-13 15:32:54,987 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 15:32:54,988 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 268 treesize of output 244 [2022-12-13 15:32:54,994 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 15:32:54,995 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 244 treesize of output 196 [2022-12-13 15:32:55,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:32:55,034 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 2 case distinctions, treesize of input 38 treesize of output 44 [2022-12-13 15:32:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 138 [2022-12-13 15:32:55,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-12-13 15:32:55,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-12-13 15:32:55,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-12-13 15:32:55,058 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-12-13 15:32:55,058 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 2 case distinctions, treesize of input 76 treesize of output 1 [2022-12-13 15:32:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:55,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864308414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:32:55,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:32:55,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-12-13 15:32:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348557335] [2022-12-13 15:32:55,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:32:55,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:32:55,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:32:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:32:55,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=917, Unknown=2, NotChecked=62, Total=1122 [2022-12-13 15:32:55,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 293 [2022-12-13 15:32:55,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 89 transitions, 762 flow. Second operand has 34 states, 34 states have (on average 76.58823529411765) internal successors, (2604), 34 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:55,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:55,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 293 [2022-12-13 15:32:55,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:57,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:33:01,234 INFO L130 PetriNetUnfolder]: 453/860 cut-off events. [2022-12-13 15:33:01,234 INFO L131 PetriNetUnfolder]: For 1702/1702 co-relation queries the response was YES. [2022-12-13 15:33:01,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3912 conditions, 860 events. 453/860 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4268 event pairs, 58 based on Foata normal form. 3/736 useless extension candidates. Maximal degree in co-relation 3190. Up to 385 conditions per place. [2022-12-13 15:33:01,238 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 119 selfloop transitions, 108 changer transitions 11/238 dead transitions. [2022-12-13 15:33:01,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 238 transitions, 2161 flow [2022-12-13 15:33:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:33:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:33:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2248 transitions. [2022-12-13 15:33:01,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2740126767430522 [2022-12-13 15:33:01,243 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2248 transitions. [2022-12-13 15:33:01,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2248 transitions. [2022-12-13 15:33:01,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:01,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2248 transitions. [2022-12-13 15:33:01,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 80.28571428571429) internal successors, (2248), 28 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:01,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 293.0) internal successors, (8497), 29 states have internal predecessors, (8497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:01,253 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 293.0) internal successors, (8497), 29 states have internal predecessors, (8497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:01,253 INFO L175 Difference]: Start difference. First operand has 59 places, 89 transitions, 762 flow. Second operand 28 states and 2248 transitions. [2022-12-13 15:33:01,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 238 transitions, 2161 flow [2022-12-13 15:33:01,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 238 transitions, 1919 flow, removed 117 selfloop flow, removed 4 redundant places. [2022-12-13 15:33:01,263 INFO L231 Difference]: Finished difference. Result has 91 places, 164 transitions, 1522 flow [2022-12-13 15:33:01,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1522, PETRI_PLACES=91, PETRI_TRANSITIONS=164} [2022-12-13 15:33:01,264 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2022-12-13 15:33:01,264 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 164 transitions, 1522 flow [2022-12-13 15:33:01,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 76.58823529411765) internal successors, (2604), 34 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:01,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:01,265 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:01,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:33:01,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:01,466 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1071961820, now seen corresponding path program 3 times [2022-12-13 15:33:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:01,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777431735] [2022-12-13 15:33:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:01,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:02,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777431735] [2022-12-13 15:33:02,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777431735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:02,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958993987] [2022-12-13 15:33:02,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:33:02,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:02,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:02,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:33:02,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:33:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 15:33:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:33:02,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:33:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:33:02,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:02,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:02,536 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 45 treesize of output 41 [2022-12-13 15:33:02,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-13 15:33:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:33:02,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958993987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:02,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:02,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2022-12-13 15:33:02,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128555677] [2022-12-13 15:33:02,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:02,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:33:02,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:33:02,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=257, Unknown=1, NotChecked=0, Total=306 [2022-12-13 15:33:03,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 293 [2022-12-13 15:33:03,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 164 transitions, 1522 flow. Second operand has 18 states, 18 states have (on average 102.27777777777777) internal successors, (1841), 18 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:03,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:03,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 293 [2022-12-13 15:33:03,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:03,568 INFO L130 PetriNetUnfolder]: 490/906 cut-off events. [2022-12-13 15:33:03,568 INFO L131 PetriNetUnfolder]: For 4364/4384 co-relation queries the response was YES. [2022-12-13 15:33:03,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4557 conditions, 906 events. 490/906 cut-off events. For 4364/4384 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4401 event pairs, 54 based on Foata normal form. 15/911 useless extension candidates. Maximal degree in co-relation 4495. Up to 356 conditions per place. [2022-12-13 15:33:03,576 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 145 selfloop transitions, 51 changer transitions 0/206 dead transitions. [2022-12-13 15:33:03,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 206 transitions, 2195 flow [2022-12-13 15:33:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:33:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:33:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1156 transitions. [2022-12-13 15:33:03,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3586720446788706 [2022-12-13 15:33:03,579 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1156 transitions. [2022-12-13 15:33:03,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1156 transitions. [2022-12-13 15:33:03,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:03,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1156 transitions. [2022-12-13 15:33:03,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.0909090909091) internal successors, (1156), 11 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:03,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 293.0) internal successors, (3516), 12 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:03,587 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 293.0) internal successors, (3516), 12 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:03,587 INFO L175 Difference]: Start difference. First operand has 91 places, 164 transitions, 1522 flow. Second operand 11 states and 1156 transitions. [2022-12-13 15:33:03,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 206 transitions, 2195 flow [2022-12-13 15:33:03,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 206 transitions, 2074 flow, removed 52 selfloop flow, removed 8 redundant places. [2022-12-13 15:33:03,612 INFO L231 Difference]: Finished difference. Result has 92 places, 166 transitions, 1558 flow [2022-12-13 15:33:03,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1558, PETRI_PLACES=92, PETRI_TRANSITIONS=166} [2022-12-13 15:33:03,613 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2022-12-13 15:33:03,613 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 166 transitions, 1558 flow [2022-12-13 15:33:03,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 102.27777777777777) internal successors, (1841), 18 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:03,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:03,614 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:03,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:33:03,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 15:33:03,816 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1566979113, now seen corresponding path program 2 times [2022-12-13 15:33:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:03,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92616074] [2022-12-13 15:33:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:04,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92616074] [2022-12-13 15:33:04,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92616074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337807155] [2022-12-13 15:33:04,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:33:04,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:04,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:04,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:04,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:33:04,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:33:04,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 15:33:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:05,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 15:33:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:05,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:05,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:05,599 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 48 treesize of output 44 [2022-12-13 15:33:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:06,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337807155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:06,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:06,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-12-13 15:33:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572064647] [2022-12-13 15:33:06,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 15:33:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 15:33:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:33:08,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 293 [2022-12-13 15:33:08,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 166 transitions, 1558 flow. Second operand has 31 states, 31 states have (on average 96.6774193548387) internal successors, (2997), 31 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) [2022-12-13 15:33:08,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:08,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 293 [2022-12-13 15:33:08,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:16,925 INFO L130 PetriNetUnfolder]: 603/1148 cut-off events. [2022-12-13 15:33:16,926 INFO L131 PetriNetUnfolder]: For 6204/6204 co-relation queries the response was YES. [2022-12-13 15:33:16,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5932 conditions, 1148 events. 603/1148 cut-off events. For 6204/6204 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6189 event pairs, 74 based on Foata normal form. 4/1144 useless extension candidates. Maximal degree in co-relation 4910. Up to 383 conditions per place. [2022-12-13 15:33:16,931 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 158 selfloop transitions, 108 changer transitions 34/300 dead transitions. [2022-12-13 15:33:16,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 300 transitions, 3024 flow [2022-12-13 15:33:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 15:33:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 15:33:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3110 transitions. [2022-12-13 15:33:16,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34239788616096 [2022-12-13 15:33:16,935 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3110 transitions. [2022-12-13 15:33:16,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3110 transitions. [2022-12-13 15:33:16,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:16,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3110 transitions. [2022-12-13 15:33:16,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 100.3225806451613) internal successors, (3110), 31 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:16,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 293.0) internal successors, (9376), 32 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:16,947 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 293.0) internal successors, (9376), 32 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:16,947 INFO L175 Difference]: Start difference. First operand has 92 places, 166 transitions, 1558 flow. Second operand 31 states and 3110 transitions. [2022-12-13 15:33:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 300 transitions, 3024 flow [2022-12-13 15:33:16,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 300 transitions, 2956 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 15:33:16,964 INFO L231 Difference]: Finished difference. Result has 130 places, 192 transitions, 2138 flow [2022-12-13 15:33:16,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2138, PETRI_PLACES=130, PETRI_TRANSITIONS=192} [2022-12-13 15:33:16,965 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2022-12-13 15:33:16,965 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 192 transitions, 2138 flow [2022-12-13 15:33:16,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 96.6774193548387) internal successors, (2997), 31 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) [2022-12-13 15:33:16,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:16,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:16,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 15:33:17,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:17,168 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash -292200989, now seen corresponding path program 3 times [2022-12-13 15:33:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:17,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279845428] [2022-12-13 15:33:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:17,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279845428] [2022-12-13 15:33:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279845428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047316508] [2022-12-13 15:33:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:33:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:17,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:17,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:33:17,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:33:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 15:33:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:18,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 15:33:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:18,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:18,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:18,664 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 40 treesize of output 36 [2022-12-13 15:33:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:19,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047316508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:19,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:19,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 15:33:19,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683568059] [2022-12-13 15:33:19,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:19,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:33:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:19,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:33:19,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:33:21,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 293 [2022-12-13 15:33:21,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 192 transitions, 2138 flow. Second operand has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:21,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:21,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 293 [2022-12-13 15:33:21,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:25,137 INFO L130 PetriNetUnfolder]: 639/1212 cut-off events. [2022-12-13 15:33:25,137 INFO L131 PetriNetUnfolder]: For 9824/9824 co-relation queries the response was YES. [2022-12-13 15:33:25,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7100 conditions, 1212 events. 639/1212 cut-off events. For 9824/9824 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6603 event pairs, 85 based on Foata normal form. 2/1202 useless extension candidates. Maximal degree in co-relation 6982. Up to 495 conditions per place. [2022-12-13 15:33:25,144 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 166 selfloop transitions, 119 changer transitions 16/301 dead transitions. [2022-12-13 15:33:25,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 301 transitions, 3617 flow [2022-12-13 15:33:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:33:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:33:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2802 transitions. [2022-12-13 15:33:25,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3415407118478791 [2022-12-13 15:33:25,147 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2802 transitions. [2022-12-13 15:33:25,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2802 transitions. [2022-12-13 15:33:25,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:25,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2802 transitions. [2022-12-13 15:33:25,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 100.07142857142857) internal successors, (2802), 28 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:25,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 293.0) internal successors, (8497), 29 states have internal predecessors, (8497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:25,163 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 293.0) internal successors, (8497), 29 states have internal predecessors, (8497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:25,163 INFO L175 Difference]: Start difference. First operand has 130 places, 192 transitions, 2138 flow. Second operand 28 states and 2802 transitions. [2022-12-13 15:33:25,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 301 transitions, 3617 flow [2022-12-13 15:33:25,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 301 transitions, 3420 flow, removed 78 selfloop flow, removed 16 redundant places. [2022-12-13 15:33:25,199 INFO L231 Difference]: Finished difference. Result has 142 places, 221 transitions, 2662 flow [2022-12-13 15:33:25,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2662, PETRI_PLACES=142, PETRI_TRANSITIONS=221} [2022-12-13 15:33:25,199 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2022-12-13 15:33:25,199 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 221 transitions, 2662 flow [2022-12-13 15:33:25,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:25,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:25,200 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:25,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:33:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:25,402 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash 660697461, now seen corresponding path program 4 times [2022-12-13 15:33:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788275789] [2022-12-13 15:33:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:25,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:26,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:26,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788275789] [2022-12-13 15:33:26,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788275789] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:26,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532791654] [2022-12-13 15:33:26,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:33:26,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:26,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:26,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:26,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:33:26,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:33:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:26,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 15:33:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:27,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 15:33:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:27,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:27,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:27,604 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 42 treesize of output 38 [2022-12-13 15:33:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:28,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532791654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:28,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:28,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-13 15:33:28,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324563964] [2022-12-13 15:33:28,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:33:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:33:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 15:33:30,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 293 [2022-12-13 15:33:30,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 221 transitions, 2662 flow. Second operand has 33 states, 33 states have (on average 92.63636363636364) internal successors, (3057), 33 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:30,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:30,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 293 [2022-12-13 15:33:30,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:34,660 INFO L130 PetriNetUnfolder]: 756/1437 cut-off events. [2022-12-13 15:33:34,660 INFO L131 PetriNetUnfolder]: For 12469/12469 co-relation queries the response was YES. [2022-12-13 15:33:34,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8858 conditions, 1437 events. 756/1437 cut-off events. For 12469/12469 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8176 event pairs, 89 based on Foata normal form. 4/1427 useless extension candidates. Maximal degree in co-relation 8768. Up to 1046 conditions per place. [2022-12-13 15:33:34,672 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 207 selfloop transitions, 105 changer transitions 10/322 dead transitions. [2022-12-13 15:33:34,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 322 transitions, 4097 flow [2022-12-13 15:33:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:33:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:33:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2114 transitions. [2022-12-13 15:33:34,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3279553211293826 [2022-12-13 15:33:34,675 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2114 transitions. [2022-12-13 15:33:34,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2114 transitions. [2022-12-13 15:33:34,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:34,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2114 transitions. [2022-12-13 15:33:34,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 96.0909090909091) internal successors, (2114), 22 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:34,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 293.0) internal successors, (6739), 23 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:34,680 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 293.0) internal successors, (6739), 23 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:34,680 INFO L175 Difference]: Start difference. First operand has 142 places, 221 transitions, 2662 flow. Second operand 22 states and 2114 transitions. [2022-12-13 15:33:34,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 322 transitions, 4097 flow [2022-12-13 15:33:34,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 322 transitions, 3937 flow, removed 41 selfloop flow, removed 16 redundant places. [2022-12-13 15:33:34,745 INFO L231 Difference]: Finished difference. Result has 153 places, 264 transitions, 3441 flow [2022-12-13 15:33:34,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=2521, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3441, PETRI_PLACES=153, PETRI_TRANSITIONS=264} [2022-12-13 15:33:34,746 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2022-12-13 15:33:34,746 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 264 transitions, 3441 flow [2022-12-13 15:33:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 92.63636363636364) internal successors, (3057), 33 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:34,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:34,747 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:34,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 15:33:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:34,948 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -362025221, now seen corresponding path program 5 times [2022-12-13 15:33:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:34,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847634542] [2022-12-13 15:33:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847634542] [2022-12-13 15:33:35,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847634542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893272622] [2022-12-13 15:33:35,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:33:35,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:35,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:35,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:33:35,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:33:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 15:33:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:35,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 15:33:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:33:35,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:36,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:36,133 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 42 treesize of output 38 [2022-12-13 15:33:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:33:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893272622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:36,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:36,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2022-12-13 15:33:36,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006247551] [2022-12-13 15:33:36,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:36,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 15:33:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 15:33:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:33:38,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 293 [2022-12-13 15:33:38,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 264 transitions, 3441 flow. Second operand has 27 states, 27 states have (on average 98.96296296296296) internal successors, (2672), 27 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:38,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:38,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 293 [2022-12-13 15:33:38,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:39,736 INFO L130 PetriNetUnfolder]: 754/1437 cut-off events. [2022-12-13 15:33:39,736 INFO L131 PetriNetUnfolder]: For 13427/13427 co-relation queries the response was YES. [2022-12-13 15:33:39,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9382 conditions, 1437 events. 754/1437 cut-off events. For 13427/13427 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8201 event pairs, 141 based on Foata normal form. 2/1427 useless extension candidates. Maximal degree in co-relation 9275. Up to 1277 conditions per place. [2022-12-13 15:33:39,745 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 235 selfloop transitions, 49 changer transitions 14/298 dead transitions. [2022-12-13 15:33:39,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 298 transitions, 4210 flow [2022-12-13 15:33:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:33:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:33:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1818 transitions. [2022-12-13 15:33:39,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3447098976109215 [2022-12-13 15:33:39,747 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1818 transitions. [2022-12-13 15:33:39,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1818 transitions. [2022-12-13 15:33:39,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:39,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1818 transitions. [2022-12-13 15:33:39,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.0) internal successors, (1818), 18 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:39,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 293.0) internal successors, (5567), 19 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:39,753 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 293.0) internal successors, (5567), 19 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:39,753 INFO L175 Difference]: Start difference. First operand has 153 places, 264 transitions, 3441 flow. Second operand 18 states and 1818 transitions. [2022-12-13 15:33:39,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 298 transitions, 4210 flow [2022-12-13 15:33:39,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 298 transitions, 4077 flow, removed 40 selfloop flow, removed 11 redundant places. [2022-12-13 15:33:39,804 INFO L231 Difference]: Finished difference. Result has 162 places, 266 transitions, 3459 flow [2022-12-13 15:33:39,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3459, PETRI_PLACES=162, PETRI_TRANSITIONS=266} [2022-12-13 15:33:39,805 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2022-12-13 15:33:39,805 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 266 transitions, 3459 flow [2022-12-13 15:33:39,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.96296296296296) internal successors, (2672), 27 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:39,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:39,806 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:39,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:33:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:33:40,006 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1938084937, now seen corresponding path program 6 times [2022-12-13 15:33:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:40,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95966618] [2022-12-13 15:33:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:40,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:40,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95966618] [2022-12-13 15:33:40,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95966618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62581110] [2022-12-13 15:33:40,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:33:40,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:40,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:40,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:40,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:33:40,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:33:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 15:33:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:41,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 15:33:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:33:41,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:41,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:41,359 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 42 treesize of output 38 [2022-12-13 15:33:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:33:41,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62581110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:41,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:41,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2022-12-13 15:33:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97463429] [2022-12-13 15:33:41,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 15:33:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 15:33:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-12-13 15:33:43,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 293 [2022-12-13 15:33:43,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 266 transitions, 3459 flow. Second operand has 28 states, 28 states have (on average 99.89285714285714) internal successors, (2797), 28 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:43,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:43,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 293 [2022-12-13 15:33:43,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:44,466 INFO L130 PetriNetUnfolder]: 755/1432 cut-off events. [2022-12-13 15:33:44,466 INFO L131 PetriNetUnfolder]: For 13578/13578 co-relation queries the response was YES. [2022-12-13 15:33:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9330 conditions, 1432 events. 755/1432 cut-off events. For 13578/13578 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8148 event pairs, 120 based on Foata normal form. 2/1422 useless extension candidates. Maximal degree in co-relation 9238. Up to 1031 conditions per place. [2022-12-13 15:33:44,474 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 198 selfloop transitions, 98 changer transitions 7/303 dead transitions. [2022-12-13 15:33:44,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 303 transitions, 4223 flow [2022-12-13 15:33:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:33:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:33:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1651 transitions. [2022-12-13 15:33:44,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35217576791808874 [2022-12-13 15:33:44,476 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1651 transitions. [2022-12-13 15:33:44,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1651 transitions. [2022-12-13 15:33:44,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:44,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1651 transitions. [2022-12-13 15:33:44,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 103.1875) internal successors, (1651), 16 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:44,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 293.0) internal successors, (4981), 17 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:44,480 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 293.0) internal successors, (4981), 17 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:44,480 INFO L175 Difference]: Start difference. First operand has 162 places, 266 transitions, 3459 flow. Second operand 16 states and 1651 transitions. [2022-12-13 15:33:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 303 transitions, 4223 flow [2022-12-13 15:33:44,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 303 transitions, 4125 flow, removed 11 selfloop flow, removed 14 redundant places. [2022-12-13 15:33:44,532 INFO L231 Difference]: Finished difference. Result has 162 places, 267 transitions, 3593 flow [2022-12-13 15:33:44,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3593, PETRI_PLACES=162, PETRI_TRANSITIONS=267} [2022-12-13 15:33:44,533 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2022-12-13 15:33:44,533 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 267 transitions, 3593 flow [2022-12-13 15:33:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 99.89285714285714) internal successors, (2797), 28 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:44,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:44,533 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:44,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:33:44,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:44,735 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:44,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1277595217, now seen corresponding path program 7 times [2022-12-13 15:33:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:44,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741322436] [2022-12-13 15:33:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:44,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741322436] [2022-12-13 15:33:45,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741322436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976545931] [2022-12-13 15:33:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:33:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:45,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:45,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:33:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:33:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:45,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 15:33:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:45,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:46,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:46,126 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 42 treesize of output 38 [2022-12-13 15:33:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:46,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976545931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:46,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:46,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 15:33:46,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604059474] [2022-12-13 15:33:46,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:46,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:33:46,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:33:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:33:48,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 293 [2022-12-13 15:33:48,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 267 transitions, 3593 flow. Second operand has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:48,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:48,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 293 [2022-12-13 15:33:48,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:52,701 INFO L130 PetriNetUnfolder]: 914/1780 cut-off events. [2022-12-13 15:33:52,702 INFO L131 PetriNetUnfolder]: For 19421/19421 co-relation queries the response was YES. [2022-12-13 15:33:52,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11839 conditions, 1780 events. 914/1780 cut-off events. For 19421/19421 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10892 event pairs, 76 based on Foata normal form. 5/1767 useless extension candidates. Maximal degree in co-relation 11718. Up to 647 conditions per place. [2022-12-13 15:33:52,718 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 237 selfloop transitions, 181 changer transitions 22/440 dead transitions. [2022-12-13 15:33:52,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 440 transitions, 5972 flow [2022-12-13 15:33:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 15:33:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 15:33:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3414 transitions. [2022-12-13 15:33:52,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34270226862075887 [2022-12-13 15:33:52,723 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3414 transitions. [2022-12-13 15:33:52,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3414 transitions. [2022-12-13 15:33:52,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:52,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3414 transitions. [2022-12-13 15:33:52,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.41176470588235) internal successors, (3414), 34 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:52,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 293.0) internal successors, (10255), 35 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:52,736 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 293.0) internal successors, (10255), 35 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:52,736 INFO L175 Difference]: Start difference. First operand has 162 places, 267 transitions, 3593 flow. Second operand 34 states and 3414 transitions. [2022-12-13 15:33:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 440 transitions, 5972 flow [2022-12-13 15:33:52,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 440 transitions, 5805 flow, removed 28 selfloop flow, removed 11 redundant places. [2022-12-13 15:33:52,814 INFO L231 Difference]: Finished difference. Result has 197 places, 330 transitions, 4917 flow [2022-12-13 15:33:52,814 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4917, PETRI_PLACES=197, PETRI_TRANSITIONS=330} [2022-12-13 15:33:52,814 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2022-12-13 15:33:52,814 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 330 transitions, 4917 flow [2022-12-13 15:33:52,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:52,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:52,815 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:33:52,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:33:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:33:53,017 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:33:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1164389169, now seen corresponding path program 8 times [2022-12-13 15:33:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:33:53,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327938261] [2022-12-13 15:33:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:33:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:33:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:33:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:33:53,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327938261] [2022-12-13 15:33:53,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327938261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:33:53,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869252251] [2022-12-13 15:33:53,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:33:53,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:33:53,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:33:53,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:33:53,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:33:53,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:33:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 15:33:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:33:54,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:33:54,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:54,312 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 35 treesize of output 23 [2022-12-13 15:33:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:54,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:54,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:33:54,995 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 118 treesize of output 98 [2022-12-13 15:33:55,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2022-12-13 15:33:55,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2022-12-13 15:33:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:55,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869252251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:55,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:33:55,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 15:33:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860702929] [2022-12-13 15:33:55,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:55,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:33:55,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:33:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:33:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1069, Unknown=1, NotChecked=0, Total=1190 [2022-12-13 15:33:57,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:33:57,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 330 transitions, 4917 flow. Second operand has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:57,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:33:57,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:33:57,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:34:15,437 WARN L233 SmtUtils]: Spent 16.52s on a formula simplification. DAG size of input: 83 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:34:24,442 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:34:35,402 WARN L233 SmtUtils]: Spent 10.49s on a formula simplification. DAG size of input: 91 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:35:02,474 WARN L233 SmtUtils]: Spent 26.86s on a formula simplification. DAG size of input: 101 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:35:08,647 INFO L130 PetriNetUnfolder]: 979/1925 cut-off events. [2022-12-13 15:35:08,647 INFO L131 PetriNetUnfolder]: For 26888/26888 co-relation queries the response was YES. [2022-12-13 15:35:08,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14045 conditions, 1925 events. 979/1925 cut-off events. For 26888/26888 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12139 event pairs, 115 based on Foata normal form. 6/1915 useless extension candidates. Maximal degree in co-relation 13888. Up to 1307 conditions per place. [2022-12-13 15:35:08,659 INFO L137 encePairwiseOnDemand]: 281/293 looper letters, 270 selfloop transitions, 127 changer transitions 36/433 dead transitions. [2022-12-13 15:35:08,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 433 transitions, 6666 flow [2022-12-13 15:35:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:35:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 15:35:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2489 transitions. [2022-12-13 15:35:08,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2831626848691695 [2022-12-13 15:35:08,663 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2489 transitions. [2022-12-13 15:35:08,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2489 transitions. [2022-12-13 15:35:08,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:08,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2489 transitions. [2022-12-13 15:35:08,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 82.96666666666667) internal successors, (2489), 30 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:08,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 293.0) internal successors, (9083), 31 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:08,674 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 293.0) internal successors, (9083), 31 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:08,674 INFO L175 Difference]: Start difference. First operand has 197 places, 330 transitions, 4917 flow. Second operand 30 states and 2489 transitions. [2022-12-13 15:35:08,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 433 transitions, 6666 flow [2022-12-13 15:35:08,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 433 transitions, 6354 flow, removed 129 selfloop flow, removed 15 redundant places. [2022-12-13 15:35:08,820 INFO L231 Difference]: Finished difference. Result has 222 places, 346 transitions, 5340 flow [2022-12-13 15:35:08,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5340, PETRI_PLACES=222, PETRI_TRANSITIONS=346} [2022-12-13 15:35:08,820 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2022-12-13 15:35:08,820 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 346 transitions, 5340 flow [2022-12-13 15:35:08,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:08,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:08,821 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:08,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:35:09,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 15:35:09,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash -649548167, now seen corresponding path program 9 times [2022-12-13 15:35:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:09,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566064292] [2022-12-13 15:35:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:35:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:09,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566064292] [2022-12-13 15:35:09,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566064292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:09,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323223116] [2022-12-13 15:35:09,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:35:09,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:09,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:09,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:35:09,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:35:09,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 15:35:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:10,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:35:10,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 15:35:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:35:10,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:11,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:11,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2022-12-13 15:35:11,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-12-13 15:35:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:35:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323223116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:11,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:11,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2022-12-13 15:35:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701240272] [2022-12-13 15:35:11,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:11,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:35:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:35:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=902, Unknown=1, NotChecked=0, Total=992 [2022-12-13 15:35:14,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:17,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:19,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:22,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:22,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:35:22,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 346 transitions, 5340 flow. Second operand has 32 states, 32 states have (on average 79.65625) internal successors, (2549), 32 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:22,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:22,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:35:22,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:25,627 INFO L130 PetriNetUnfolder]: 955/1873 cut-off events. [2022-12-13 15:35:25,627 INFO L131 PetriNetUnfolder]: For 28826/28826 co-relation queries the response was YES. [2022-12-13 15:35:25,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14014 conditions, 1873 events. 955/1873 cut-off events. For 28826/28826 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11806 event pairs, 131 based on Foata normal form. 2/1859 useless extension candidates. Maximal degree in co-relation 13814. Up to 1034 conditions per place. [2022-12-13 15:35:25,639 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 237 selfloop transitions, 161 changer transitions 7/405 dead transitions. [2022-12-13 15:35:25,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 405 transitions, 6694 flow [2022-12-13 15:35:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:35:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:35:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1652 transitions. [2022-12-13 15:35:25,641 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2819112627986348 [2022-12-13 15:35:25,641 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1652 transitions. [2022-12-13 15:35:25,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1652 transitions. [2022-12-13 15:35:25,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:25,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1652 transitions. [2022-12-13 15:35:25,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.6) internal successors, (1652), 20 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:25,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 293.0) internal successors, (6153), 21 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:25,646 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 293.0) internal successors, (6153), 21 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:25,646 INFO L175 Difference]: Start difference. First operand has 222 places, 346 transitions, 5340 flow. Second operand 20 states and 1652 transitions. [2022-12-13 15:35:25,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 405 transitions, 6694 flow [2022-12-13 15:35:25,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 405 transitions, 6403 flow, removed 105 selfloop flow, removed 19 redundant places. [2022-12-13 15:35:25,802 INFO L231 Difference]: Finished difference. Result has 220 places, 359 transitions, 5674 flow [2022-12-13 15:35:25,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=5059, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5674, PETRI_PLACES=220, PETRI_TRANSITIONS=359} [2022-12-13 15:35:25,803 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2022-12-13 15:35:25,803 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 359 transitions, 5674 flow [2022-12-13 15:35:25,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 79.65625) internal successors, (2549), 32 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:25,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:35:25,803 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:35:25,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:35:26,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:35:26,005 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:35:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:35:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1389058257, now seen corresponding path program 10 times [2022-12-13 15:35:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:35:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066453282] [2022-12-13 15:35:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:35:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:35:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:35:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:35:26,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:35:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066453282] [2022-12-13 15:35:26,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066453282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:35:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620253157] [2022-12-13 15:35:26,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:35:26,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:35:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:35:26,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:35:26,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:35:27,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:35:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:35:27,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:35:27,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:35:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:35:27,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:35:27,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 15:35:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:35:27,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:35:28,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:35:28,345 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 59 treesize of output 55 [2022-12-13 15:35:28,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-12-13 15:35:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:35:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620253157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:35:28,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:35:28,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 15:35:28,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650382247] [2022-12-13 15:35:28,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:35:28,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:35:28,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:35:28,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:35:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1051, Unknown=3, NotChecked=0, Total=1190 [2022-12-13 15:35:31,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:34,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:38,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:35:38,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:35:38,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 359 transitions, 5674 flow. Second operand has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:38,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:35:38,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:35:38,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:46,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:36:01,158 WARN L233 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:36:06,373 INFO L130 PetriNetUnfolder]: 1137/2230 cut-off events. [2022-12-13 15:36:06,373 INFO L131 PetriNetUnfolder]: For 36927/36927 co-relation queries the response was YES. [2022-12-13 15:36:06,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16779 conditions, 2230 events. 1137/2230 cut-off events. For 36927/36927 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14589 event pairs, 136 based on Foata normal form. 5/2215 useless extension candidates. Maximal degree in co-relation 16583. Up to 1231 conditions per place. [2022-12-13 15:36:06,387 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 258 selfloop transitions, 239 changer transitions 24/521 dead transitions. [2022-12-13 15:36:06,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 521 transitions, 8373 flow [2022-12-13 15:36:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:36:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 15:36:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2749 transitions. [2022-12-13 15:36:06,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28431068362808976 [2022-12-13 15:36:06,390 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2749 transitions. [2022-12-13 15:36:06,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2749 transitions. [2022-12-13 15:36:06,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:06,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2749 transitions. [2022-12-13 15:36:06,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 83.3030303030303) internal successors, (2749), 33 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:06,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:06,398 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:06,398 INFO L175 Difference]: Start difference. First operand has 220 places, 359 transitions, 5674 flow. Second operand 33 states and 2749 transitions. [2022-12-13 15:36:06,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 521 transitions, 8373 flow [2022-12-13 15:36:06,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 521 transitions, 8206 flow, removed 42 selfloop flow, removed 11 redundant places. [2022-12-13 15:36:06,588 INFO L231 Difference]: Finished difference. Result has 253 places, 430 transitions, 7505 flow [2022-12-13 15:36:06,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7505, PETRI_PLACES=253, PETRI_TRANSITIONS=430} [2022-12-13 15:36:06,589 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2022-12-13 15:36:06,589 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 430 transitions, 7505 flow [2022-12-13 15:36:06,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.54285714285714) internal successors, (2784), 35 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:06,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:06,589 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:06,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:36:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:06,790 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1842442386, now seen corresponding path program 11 times [2022-12-13 15:36:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:06,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706646648] [2022-12-13 15:36:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706646648] [2022-12-13 15:36:07,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706646648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045723331] [2022-12-13 15:36:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:36:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:07,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:07,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:36:08,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:36:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:36:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:08,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:36:08,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 15:36:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:36:08,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:08,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:08,922 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 118 treesize of output 98 [2022-12-13 15:36:08,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2022-12-13 15:36:08,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2022-12-13 15:36:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:36:09,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045723331] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:09,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:09,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 32 [2022-12-13 15:36:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875624244] [2022-12-13 15:36:09,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:09,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:36:09,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:36:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1020, Unknown=1, NotChecked=0, Total=1122 [2022-12-13 15:36:12,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:36:12,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 430 transitions, 7505 flow. Second operand has 34 states, 34 states have (on average 79.61764705882354) internal successors, (2707), 34 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:12,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:12,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:36:12,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:14,691 INFO L130 PetriNetUnfolder]: 1139/2231 cut-off events. [2022-12-13 15:36:14,692 INFO L131 PetriNetUnfolder]: For 42761/42761 co-relation queries the response was YES. [2022-12-13 15:36:14,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18132 conditions, 2231 events. 1139/2231 cut-off events. For 42761/42761 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14575 event pairs, 139 based on Foata normal form. 1/2212 useless extension candidates. Maximal degree in co-relation 17987. Up to 1798 conditions per place. [2022-12-13 15:36:14,706 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 358 selfloop transitions, 138 changer transitions 5/501 dead transitions. [2022-12-13 15:36:14,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 501 transitions, 9335 flow [2022-12-13 15:36:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:36:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:36:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1660 transitions. [2022-12-13 15:36:14,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2832764505119454 [2022-12-13 15:36:14,709 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1660 transitions. [2022-12-13 15:36:14,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1660 transitions. [2022-12-13 15:36:14,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:14,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1660 transitions. [2022-12-13 15:36:14,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 83.0) internal successors, (1660), 20 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 293.0) internal successors, (6153), 21 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,713 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 293.0) internal successors, (6153), 21 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,713 INFO L175 Difference]: Start difference. First operand has 253 places, 430 transitions, 7505 flow. Second operand 20 states and 1660 transitions. [2022-12-13 15:36:14,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 501 transitions, 9335 flow [2022-12-13 15:36:14,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 501 transitions, 8901 flow, removed 189 selfloop flow, removed 16 redundant places. [2022-12-13 15:36:14,993 INFO L231 Difference]: Finished difference. Result has 255 places, 454 transitions, 7972 flow [2022-12-13 15:36:14,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7972, PETRI_PLACES=255, PETRI_TRANSITIONS=454} [2022-12-13 15:36:14,993 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2022-12-13 15:36:14,993 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 454 transitions, 7972 flow [2022-12-13 15:36:14,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 79.61764705882354) internal successors, (2707), 34 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:14,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:14,994 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:14,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:36:15,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:15,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash -855300145, now seen corresponding path program 12 times [2022-12-13 15:36:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:15,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727164673] [2022-12-13 15:36:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:36:15,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:15,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727164673] [2022-12-13 15:36:15,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727164673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:15,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904903160] [2022-12-13 15:36:15,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:36:15,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:15,330 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:36:15,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:36:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:36:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:36:15,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:36:15,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904903160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:15,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:15,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 15:36:15,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472878312] [2022-12-13 15:36:15,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:36:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:36:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:36:15,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 293 [2022-12-13 15:36:15,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 454 transitions, 7972 flow. Second operand has 18 states, 18 states have (on average 120.77777777777777) internal successors, (2174), 18 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:15,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:15,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 293 [2022-12-13 15:36:15,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:16,097 INFO L130 PetriNetUnfolder]: 605/1264 cut-off events. [2022-12-13 15:36:16,097 INFO L131 PetriNetUnfolder]: For 25010/25021 co-relation queries the response was YES. [2022-12-13 15:36:16,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10416 conditions, 1264 events. 605/1264 cut-off events. For 25010/25021 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7725 event pairs, 219 based on Foata normal form. 140/1394 useless extension candidates. Maximal degree in co-relation 10333. Up to 896 conditions per place. [2022-12-13 15:36:16,106 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 212 selfloop transitions, 12 changer transitions 41/275 dead transitions. [2022-12-13 15:36:16,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 275 transitions, 5457 flow [2022-12-13 15:36:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:36:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:36:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 997 transitions. [2022-12-13 15:36:16,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4253412969283277 [2022-12-13 15:36:16,107 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 997 transitions. [2022-12-13 15:36:16,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 997 transitions. [2022-12-13 15:36:16,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:16,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 997 transitions. [2022-12-13 15:36:16,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.625) internal successors, (997), 8 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:16,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:16,110 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 293.0) internal successors, (2637), 9 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:16,110 INFO L175 Difference]: Start difference. First operand has 255 places, 454 transitions, 7972 flow. Second operand 8 states and 997 transitions. [2022-12-13 15:36:16,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 275 transitions, 5457 flow [2022-12-13 15:36:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 275 transitions, 5057 flow, removed 56 selfloop flow, removed 27 redundant places. [2022-12-13 15:36:16,201 INFO L231 Difference]: Finished difference. Result has 220 places, 225 transitions, 3829 flow [2022-12-13 15:36:16,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3829, PETRI_PLACES=220, PETRI_TRANSITIONS=225} [2022-12-13 15:36:16,202 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2022-12-13 15:36:16,202 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 225 transitions, 3829 flow [2022-12-13 15:36:16,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 120.77777777777777) internal successors, (2174), 18 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:16,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:16,202 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:16,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:36:16,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:16,404 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1599764381, now seen corresponding path program 13 times [2022-12-13 15:36:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:16,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808894457] [2022-12-13 15:36:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:16,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808894457] [2022-12-13 15:36:16,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808894457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194439077] [2022-12-13 15:36:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:36:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:16,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:16,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:36:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:36:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:36:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:36:16,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194439077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:16,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:16,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 18 [2022-12-13 15:36:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753778139] [2022-12-13 15:36:16,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:16,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:36:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:16,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:36:16,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:36:17,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 293 [2022-12-13 15:36:17,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 225 transitions, 3829 flow. Second operand has 19 states, 19 states have (on average 119.6842105263158) internal successors, (2274), 19 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:17,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 293 [2022-12-13 15:36:17,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:17,605 INFO L130 PetriNetUnfolder]: 757/1526 cut-off events. [2022-12-13 15:36:17,605 INFO L131 PetriNetUnfolder]: For 22299/22310 co-relation queries the response was YES. [2022-12-13 15:36:17,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11116 conditions, 1526 events. 757/1526 cut-off events. For 22299/22310 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9284 event pairs, 97 based on Foata normal form. 46/1564 useless extension candidates. Maximal degree in co-relation 11047. Up to 408 conditions per place. [2022-12-13 15:36:17,613 INFO L137 encePairwiseOnDemand]: 286/293 looper letters, 89 selfloop transitions, 107 changer transitions 101/305 dead transitions. [2022-12-13 15:36:17,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 305 transitions, 5152 flow [2022-12-13 15:36:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:36:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:36:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1729 transitions. [2022-12-13 15:36:17,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42150170648464164 [2022-12-13 15:36:17,615 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1729 transitions. [2022-12-13 15:36:17,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1729 transitions. [2022-12-13 15:36:17,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:17,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1729 transitions. [2022-12-13 15:36:17,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.5) internal successors, (1729), 14 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 293.0) internal successors, (4395), 15 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,619 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 293.0) internal successors, (4395), 15 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,619 INFO L175 Difference]: Start difference. First operand has 220 places, 225 transitions, 3829 flow. Second operand 14 states and 1729 transitions. [2022-12-13 15:36:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 305 transitions, 5152 flow [2022-12-13 15:36:17,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 305 transitions, 4613 flow, removed 55 selfloop flow, removed 34 redundant places. [2022-12-13 15:36:17,688 INFO L231 Difference]: Finished difference. Result has 186 places, 169 transitions, 2726 flow [2022-12-13 15:36:17,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2726, PETRI_PLACES=186, PETRI_TRANSITIONS=169} [2022-12-13 15:36:17,689 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2022-12-13 15:36:17,689 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 169 transitions, 2726 flow [2022-12-13 15:36:17,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 119.6842105263158) internal successors, (2274), 19 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:17,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:17,689 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:17,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:36:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 15:36:17,890 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1133184284, now seen corresponding path program 14 times [2022-12-13 15:36:17,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:17,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156597401] [2022-12-13 15:36:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:18,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156597401] [2022-12-13 15:36:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156597401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616497493] [2022-12-13 15:36:18,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:36:18,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:18,409 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:18,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:36:18,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:36:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:18,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 15:36:18,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:18,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 15:36:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:18,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:18,939 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 47 treesize of output 44 [2022-12-13 15:36:18,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-12-13 15:36:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:19,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616497493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:19,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:19,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 31 [2022-12-13 15:36:19,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685955842] [2022-12-13 15:36:19,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:19,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:36:19,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:36:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=807, Unknown=2, NotChecked=0, Total=992 [2022-12-13 15:36:19,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 293 [2022-12-13 15:36:19,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 169 transitions, 2726 flow. Second operand has 32 states, 32 states have (on average 96.625) internal successors, (3092), 32 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:19,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:19,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 293 [2022-12-13 15:36:19,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:22,533 INFO L130 PetriNetUnfolder]: 854/1766 cut-off events. [2022-12-13 15:36:22,533 INFO L131 PetriNetUnfolder]: For 23416/23416 co-relation queries the response was YES. [2022-12-13 15:36:22,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13522 conditions, 1766 events. 854/1766 cut-off events. For 23416/23416 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11016 event pairs, 119 based on Foata normal form. 90/1845 useless extension candidates. Maximal degree in co-relation 13469. Up to 610 conditions per place. [2022-12-13 15:36:22,543 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 185 selfloop transitions, 190 changer transitions 28/403 dead transitions. [2022-12-13 15:36:22,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 403 transitions, 6720 flow [2022-12-13 15:36:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 15:36:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 15:36:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3718 transitions. [2022-12-13 15:36:22,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3429572917627525 [2022-12-13 15:36:22,547 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3718 transitions. [2022-12-13 15:36:22,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3718 transitions. [2022-12-13 15:36:22,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:22,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3718 transitions. [2022-12-13 15:36:22,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 100.48648648648648) internal successors, (3718), 37 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:22,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 293.0) internal successors, (11134), 38 states have internal predecessors, (11134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:22,556 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 293.0) internal successors, (11134), 38 states have internal predecessors, (11134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:22,556 INFO L175 Difference]: Start difference. First operand has 186 places, 169 transitions, 2726 flow. Second operand 37 states and 3718 transitions. [2022-12-13 15:36:22,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 403 transitions, 6720 flow [2022-12-13 15:36:22,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 403 transitions, 5456 flow, removed 572 selfloop flow, removed 20 redundant places. [2022-12-13 15:36:22,645 INFO L231 Difference]: Finished difference. Result has 166 places, 273 transitions, 4596 flow [2022-12-13 15:36:22,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4596, PETRI_PLACES=166, PETRI_TRANSITIONS=273} [2022-12-13 15:36:22,646 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2022-12-13 15:36:22,646 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 273 transitions, 4596 flow [2022-12-13 15:36:22,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.625) internal successors, (3092), 32 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:22,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:22,647 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:22,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:36:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 15:36:22,848 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1812060950, now seen corresponding path program 15 times [2022-12-13 15:36:22,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:22,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445097531] [2022-12-13 15:36:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:22,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:23,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445097531] [2022-12-13 15:36:23,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445097531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:23,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624561137] [2022-12-13 15:36:23,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:36:23,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:23,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:23,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:36:23,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:36:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 15:36:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:36:23,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:23,734 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-13 15:36:23,734 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 26 treesize of output 18 [2022-12-13 15:36:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:36:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624561137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:23,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:23,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2022-12-13 15:36:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321639500] [2022-12-13 15:36:23,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:36:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:36:23,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:36:24,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 293 [2022-12-13 15:36:24,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 273 transitions, 4596 flow. Second operand has 23 states, 23 states have (on average 110.08695652173913) internal successors, (2532), 23 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:24,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:24,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 293 [2022-12-13 15:36:24,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:26,406 INFO L130 PetriNetUnfolder]: 1209/2364 cut-off events. [2022-12-13 15:36:26,406 INFO L131 PetriNetUnfolder]: For 26811/26811 co-relation queries the response was YES. [2022-12-13 15:36:26,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16502 conditions, 2364 events. 1209/2364 cut-off events. For 26811/26811 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15000 event pairs, 120 based on Foata normal form. 122/2485 useless extension candidates. Maximal degree in co-relation 16445. Up to 942 conditions per place. [2022-12-13 15:36:26,419 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 176 selfloop transitions, 282 changer transitions 1/459 dead transitions. [2022-12-13 15:36:26,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 459 transitions, 7453 flow [2022-12-13 15:36:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:36:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 15:36:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3735 transitions. [2022-12-13 15:36:26,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38628606887992556 [2022-12-13 15:36:26,422 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3735 transitions. [2022-12-13 15:36:26,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3735 transitions. [2022-12-13 15:36:26,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:26,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3735 transitions. [2022-12-13 15:36:26,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 113.18181818181819) internal successors, (3735), 33 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:26,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:26,430 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:26,430 INFO L175 Difference]: Start difference. First operand has 166 places, 273 transitions, 4596 flow. Second operand 33 states and 3735 transitions. [2022-12-13 15:36:26,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 459 transitions, 7453 flow [2022-12-13 15:36:26,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 459 transitions, 6866 flow, removed 255 selfloop flow, removed 14 redundant places. [2022-12-13 15:36:26,522 INFO L231 Difference]: Finished difference. Result has 184 places, 356 transitions, 6153 flow [2022-12-13 15:36:26,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6153, PETRI_PLACES=184, PETRI_TRANSITIONS=356} [2022-12-13 15:36:26,522 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 163 predicate places. [2022-12-13 15:36:26,523 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 356 transitions, 6153 flow [2022-12-13 15:36:26,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 110.08695652173913) internal successors, (2532), 23 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:26,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:26,523 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:26,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:36:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 15:36:26,725 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -75975278, now seen corresponding path program 16 times [2022-12-13 15:36:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205246287] [2022-12-13 15:36:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:27,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:27,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205246287] [2022-12-13 15:36:27,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205246287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:27,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932789645] [2022-12-13 15:36:27,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:36:27,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:27,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:27,266 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:27,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:36:27,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:36:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:27,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 15:36:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:27,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:36:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:27,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:27,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:27,823 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 47 treesize of output 44 [2022-12-13 15:36:27,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-12-13 15:36:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:28,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932789645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:28,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:28,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 15:36:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792611772] [2022-12-13 15:36:28,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:28,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:36:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:36:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:36:28,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 293 [2022-12-13 15:36:28,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 356 transitions, 6153 flow. Second operand has 32 states, 32 states have (on average 103.65625) internal successors, (3317), 32 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:28,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:28,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 293 [2022-12-13 15:36:28,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:30,624 INFO L130 PetriNetUnfolder]: 1200/2349 cut-off events. [2022-12-13 15:36:30,624 INFO L131 PetriNetUnfolder]: For 27424/27438 co-relation queries the response was YES. [2022-12-13 15:36:30,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16472 conditions, 2349 events. 1200/2349 cut-off events. For 27424/27438 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14888 event pairs, 441 based on Foata normal form. 9/2355 useless extension candidates. Maximal degree in co-relation 16416. Up to 1883 conditions per place. [2022-12-13 15:36:30,650 INFO L137 encePairwiseOnDemand]: 286/293 looper letters, 322 selfloop transitions, 72 changer transitions 0/404 dead transitions. [2022-12-13 15:36:30,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 404 transitions, 7207 flow [2022-12-13 15:36:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:36:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:36:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2030 transitions. [2022-12-13 15:36:30,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3646488234237471 [2022-12-13 15:36:30,654 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2030 transitions. [2022-12-13 15:36:30,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2030 transitions. [2022-12-13 15:36:30,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:30,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2030 transitions. [2022-12-13 15:36:30,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 106.84210526315789) internal successors, (2030), 19 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:30,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 293.0) internal successors, (5860), 20 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:30,660 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 293.0) internal successors, (5860), 20 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:30,660 INFO L175 Difference]: Start difference. First operand has 184 places, 356 transitions, 6153 flow. Second operand 19 states and 2030 transitions. [2022-12-13 15:36:30,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 404 transitions, 7207 flow [2022-12-13 15:36:30,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 404 transitions, 6818 flow, removed 102 selfloop flow, removed 11 redundant places. [2022-12-13 15:36:30,786 INFO L231 Difference]: Finished difference. Result has 193 places, 359 transitions, 5981 flow [2022-12-13 15:36:30,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5981, PETRI_PLACES=193, PETRI_TRANSITIONS=359} [2022-12-13 15:36:30,786 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2022-12-13 15:36:30,786 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 359 transitions, 5981 flow [2022-12-13 15:36:30,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.65625) internal successors, (3317), 32 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:30,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:30,787 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:30,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:36:30,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 15:36:30,988 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:30,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1098697960, now seen corresponding path program 17 times [2022-12-13 15:36:30,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:30,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900837124] [2022-12-13 15:36:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:30,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900837124] [2022-12-13 15:36:31,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900837124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879673198] [2022-12-13 15:36:31,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:36:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:31,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:31,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:36:31,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:36:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 15:36:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:31,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:36:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:31,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:32,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:32,188 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 47 treesize of output 44 [2022-12-13 15:36:32,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-12-13 15:36:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:32,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879673198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:32,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:32,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 15:36:32,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836372539] [2022-12-13 15:36:32,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:36:32,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:36:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:36:33,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 293 [2022-12-13 15:36:33,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 359 transitions, 5981 flow. Second operand has 32 states, 32 states have (on average 109.65625) internal successors, (3509), 32 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:33,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:33,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 293 [2022-12-13 15:36:33,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:36,027 INFO L130 PetriNetUnfolder]: 1226/2447 cut-off events. [2022-12-13 15:36:36,027 INFO L131 PetriNetUnfolder]: For 27243/27257 co-relation queries the response was YES. [2022-12-13 15:36:36,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16549 conditions, 2447 events. 1226/2447 cut-off events. For 27243/27257 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15927 event pairs, 449 based on Foata normal form. 13/2456 useless extension candidates. Maximal degree in co-relation 16490. Up to 1883 conditions per place. [2022-12-13 15:36:36,044 INFO L137 encePairwiseOnDemand]: 286/293 looper letters, 350 selfloop transitions, 82 changer transitions 0/442 dead transitions. [2022-12-13 15:36:36,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 442 transitions, 7351 flow [2022-12-13 15:36:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:36:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:36:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2719 transitions. [2022-12-13 15:36:36,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3866609783845279 [2022-12-13 15:36:36,048 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2719 transitions. [2022-12-13 15:36:36,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2719 transitions. [2022-12-13 15:36:36,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:36,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2719 transitions. [2022-12-13 15:36:36,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 113.29166666666667) internal successors, (2719), 24 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:36,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 293.0) internal successors, (7325), 25 states have internal predecessors, (7325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:36,060 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 293.0) internal successors, (7325), 25 states have internal predecessors, (7325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:36,060 INFO L175 Difference]: Start difference. First operand has 193 places, 359 transitions, 5981 flow. Second operand 24 states and 2719 transitions. [2022-12-13 15:36:36,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 442 transitions, 7351 flow [2022-12-13 15:36:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 442 transitions, 7172 flow, removed 49 selfloop flow, removed 12 redundant places. [2022-12-13 15:36:36,178 INFO L231 Difference]: Finished difference. Result has 210 places, 372 transitions, 6257 flow [2022-12-13 15:36:36,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6257, PETRI_PLACES=210, PETRI_TRANSITIONS=372} [2022-12-13 15:36:36,179 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2022-12-13 15:36:36,179 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 372 transitions, 6257 flow [2022-12-13 15:36:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 109.65625) internal successors, (3509), 32 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:36,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:36,179 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:36,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:36:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:36:36,381 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -770599161, now seen corresponding path program 18 times [2022-12-13 15:36:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:36,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168471962] [2022-12-13 15:36:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168471962] [2022-12-13 15:36:37,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168471962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074907129] [2022-12-13 15:36:37,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:36:37,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:37,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:37,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:36:37,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:36:37,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 15:36:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:36:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 15:36:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:36:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:37,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:37,618 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 47 treesize of output 44 [2022-12-13 15:36:37,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-12-13 15:36:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:36:37,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074907129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:37,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:37,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2022-12-13 15:36:37,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804839708] [2022-12-13 15:36:37,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:37,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 15:36:37,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:37,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 15:36:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=673, Unknown=2, NotChecked=0, Total=756 [2022-12-13 15:36:37,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 293 [2022-12-13 15:36:37,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 372 transitions, 6257 flow. Second operand has 28 states, 28 states have (on average 98.89285714285714) internal successors, (2769), 28 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:37,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:37,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 293 [2022-12-13 15:36:37,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:36:39,291 INFO L130 PetriNetUnfolder]: 1570/3055 cut-off events. [2022-12-13 15:36:39,291 INFO L131 PetriNetUnfolder]: For 35228/35246 co-relation queries the response was YES. [2022-12-13 15:36:39,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20915 conditions, 3055 events. 1570/3055 cut-off events. For 35228/35246 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20458 event pairs, 241 based on Foata normal form. 93/3144 useless extension candidates. Maximal degree in co-relation 20851. Up to 892 conditions per place. [2022-12-13 15:36:39,312 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 238 selfloop transitions, 276 changer transitions 1/525 dead transitions. [2022-12-13 15:36:39,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 525 transitions, 9364 flow [2022-12-13 15:36:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:36:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:36:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1843 transitions. [2022-12-13 15:36:39,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34945013272658326 [2022-12-13 15:36:39,315 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1843 transitions. [2022-12-13 15:36:39,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1843 transitions. [2022-12-13 15:36:39,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:36:39,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1843 transitions. [2022-12-13 15:36:39,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.38888888888889) internal successors, (1843), 18 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:39,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 293.0) internal successors, (5567), 19 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:39,321 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 293.0) internal successors, (5567), 19 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:39,321 INFO L175 Difference]: Start difference. First operand has 210 places, 372 transitions, 6257 flow. Second operand 18 states and 1843 transitions. [2022-12-13 15:36:39,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 525 transitions, 9364 flow [2022-12-13 15:36:39,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 525 transitions, 9246 flow, removed 30 selfloop flow, removed 10 redundant places. [2022-12-13 15:36:39,510 INFO L231 Difference]: Finished difference. Result has 217 places, 432 transitions, 7964 flow [2022-12-13 15:36:39,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7964, PETRI_PLACES=217, PETRI_TRANSITIONS=432} [2022-12-13 15:36:39,511 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2022-12-13 15:36:39,511 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 432 transitions, 7964 flow [2022-12-13 15:36:39,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.89285714285714) internal successors, (2769), 28 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:39,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:39,511 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:39,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:36:39,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:36:39,713 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:36:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash -19901472, now seen corresponding path program 19 times [2022-12-13 15:36:39,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:36:39,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787480800] [2022-12-13 15:36:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:36:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:36:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:40,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:36:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787480800] [2022-12-13 15:36:40,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787480800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:36:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074346021] [2022-12-13 15:36:40,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:36:40,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:36:40,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:36:40,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:36:40,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:36:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:36:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 15:36:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:41,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:41,548 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 48 treesize of output 12 [2022-12-13 15:36:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:41,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:42,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:36:42,236 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 72 treesize of output 90 [2022-12-13 15:36:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:43,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074346021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:43,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:36:43,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-12-13 15:36:43,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415505828] [2022-12-13 15:36:43,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:43,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:36:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:36:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:36:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 15:36:48,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:36:49,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:36:51,650 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 [] [2022-12-13 15:36:52,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 293 [2022-12-13 15:36:52,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 432 transitions, 7964 flow. Second operand has 40 states, 40 states have (on average 95.525) internal successors, (3821), 40 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:52,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:52,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 293 [2022-12-13 15:36:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:00,909 INFO L130 PetriNetUnfolder]: 1671/3272 cut-off events. [2022-12-13 15:37:00,909 INFO L131 PetriNetUnfolder]: For 40670/40670 co-relation queries the response was YES. [2022-12-13 15:37:00,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23305 conditions, 3272 events. 1671/3272 cut-off events. For 40670/40670 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22392 event pairs, 233 based on Foata normal form. 2/3273 useless extension candidates. Maximal degree in co-relation 23240. Up to 900 conditions per place. [2022-12-13 15:37:00,928 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 248 selfloop transitions, 273 changer transitions 41/562 dead transitions. [2022-12-13 15:37:00,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 562 transitions, 10256 flow [2022-12-13 15:37:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:37:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 15:37:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3265 transitions. [2022-12-13 15:37:00,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33767711242113974 [2022-12-13 15:37:00,932 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3265 transitions. [2022-12-13 15:37:00,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3265 transitions. [2022-12-13 15:37:00,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:37:00,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3265 transitions. [2022-12-13 15:37:00,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 98.93939393939394) internal successors, (3265), 33 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:00,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:00,939 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:00,939 INFO L175 Difference]: Start difference. First operand has 217 places, 432 transitions, 7964 flow. Second operand 33 states and 3265 transitions. [2022-12-13 15:37:00,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 562 transitions, 10256 flow [2022-12-13 15:37:01,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 562 transitions, 10026 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-12-13 15:37:01,188 INFO L231 Difference]: Finished difference. Result has 252 places, 459 transitions, 8906 flow [2022-12-13 15:37:01,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8906, PETRI_PLACES=252, PETRI_TRANSITIONS=459} [2022-12-13 15:37:01,189 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2022-12-13 15:37:01,189 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 459 transitions, 8906 flow [2022-12-13 15:37:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 95.525) internal successors, (3821), 40 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:01,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:37:01,190 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:37:01,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 15:37:01,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:01,391 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:37:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:37:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash 967872950, now seen corresponding path program 20 times [2022-12-13 15:37:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:37:01,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172738910] [2022-12-13 15:37:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:37:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:37:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:37:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:37:02,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:37:02,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172738910] [2022-12-13 15:37:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172738910] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:37:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833620433] [2022-12-13 15:37:02,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:37:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:37:02,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:37:02,277 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:37:02,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:37:02,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:37:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:37:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 99 conjunts are in the unsatisfiable core [2022-12-13 15:37:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:37:02,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 15:37:02,513 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 16 treesize of output 12 [2022-12-13 15:37:02,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 15:37:02,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:37:02,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:37:03,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:37:03,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:37:03,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:03,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 19 [2022-12-13 15:37:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:37:03,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:37:13,698 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:37:14,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:14,542 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 3 case distinctions, treesize of input 229 treesize of output 127 [2022-12-13 15:37:14,599 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 15:37:14,600 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 683 treesize of output 651 [2022-12-13 15:37:14,660 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 15:37:14,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 599 treesize of output 587 [2022-12-13 15:37:14,728 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 15:37:14,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 535 treesize of output 459 [2022-12-13 15:37:17,237 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-12-13 15:37:17,238 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 3 case distinctions, treesize of input 229 treesize of output 1 [2022-12-13 15:37:17,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:37:17,261 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 3 case distinctions, treesize of input 139 treesize of output 93 [2022-12-13 15:37:17,285 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-12-13 15:37:17,285 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 216 treesize of output 195 [2022-12-13 15:37:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:37:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:37:17,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:37:17,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 144 [2022-12-13 15:37:17,317 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-12-13 15:37:17,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 172 treesize of output 138 [2022-12-13 15:37:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:37:17,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833620433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:37:17,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:37:17,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2022-12-13 15:37:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640484200] [2022-12-13 15:37:17,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:37:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 15:37:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:37:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 15:37:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1582, Unknown=5, NotChecked=0, Total=1806 [2022-12-13 15:37:22,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 293 [2022-12-13 15:37:22,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 459 transitions, 8906 flow. Second operand has 43 states, 43 states have (on average 76.46511627906976) internal successors, (3288), 43 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:37:22,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:37:22,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 293 [2022-12-13 15:37:22,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:31,456 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:37:40,198 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:38:12,790 WARN L233 SmtUtils]: Spent 32.25s on a formula simplification. DAG size of input: 137 DAG size of output: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:38:42,313 WARN L233 SmtUtils]: Spent 27.80s on a formula simplification. DAG size of input: 139 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:38:44,551 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 [0, 1] [2022-12-13 15:38:46,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 15:38:49,377 INFO L130 PetriNetUnfolder]: 1643/3207 cut-off events. [2022-12-13 15:38:49,378 INFO L131 PetriNetUnfolder]: For 45787/45787 co-relation queries the response was YES. [2022-12-13 15:38:49,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24190 conditions, 3207 events. 1643/3207 cut-off events. For 45787/45787 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21701 event pairs, 384 based on Foata normal form. 1/3207 useless extension candidates. Maximal degree in co-relation 24114. Up to 1788 conditions per place. [2022-12-13 15:38:49,398 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 327 selfloop transitions, 192 changer transitions 18/537 dead transitions. [2022-12-13 15:38:49,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 537 transitions, 10495 flow [2022-12-13 15:38:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:38:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:38:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1926 transitions. [2022-12-13 15:38:49,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2738907849829352 [2022-12-13 15:38:49,401 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1926 transitions. [2022-12-13 15:38:49,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1926 transitions. [2022-12-13 15:38:49,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:49,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1926 transitions. [2022-12-13 15:38:49,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 80.25) internal successors, (1926), 24 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:49,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 293.0) internal successors, (7325), 25 states have internal predecessors, (7325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:49,406 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 293.0) internal successors, (7325), 25 states have internal predecessors, (7325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:49,406 INFO L175 Difference]: Start difference. First operand has 252 places, 459 transitions, 8906 flow. Second operand 24 states and 1926 transitions. [2022-12-13 15:38:49,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 537 transitions, 10495 flow [2022-12-13 15:38:49,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 537 transitions, 10175 flow, removed 46 selfloop flow, removed 21 redundant places. [2022-12-13 15:38:49,652 INFO L231 Difference]: Finished difference. Result has 252 places, 465 transitions, 9157 flow [2022-12-13 15:38:49,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=8609, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9157, PETRI_PLACES=252, PETRI_TRANSITIONS=465} [2022-12-13 15:38:49,653 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2022-12-13 15:38:49,653 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 465 transitions, 9157 flow [2022-12-13 15:38:49,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.46511627906976) internal successors, (3288), 43 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:49,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:49,654 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:49,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 15:38:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:38:49,856 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:38:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:49,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1939321694, now seen corresponding path program 21 times [2022-12-13 15:38:49,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:38:49,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557508891] [2022-12-13 15:38:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:38:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:38:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:38:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:38:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:38:51,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557508891] [2022-12-13 15:38:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557508891] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:38:51,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326072705] [2022-12-13 15:38:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:38:51,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:38:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:38:51,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:38:51,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:38:51,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:38:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-13 15:38:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:38:51,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 15:38:52,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:52,207 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 59 treesize of output 16 [2022-12-13 15:38:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:38:52,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:53,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:53,420 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 213 treesize of output 197 [2022-12-13 15:38:53,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:53,432 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 136 treesize of output 123 [2022-12-13 15:38:53,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:38:53,442 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 123 treesize of output 97 [2022-12-13 15:38:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:38:54,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326072705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:54,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:38:54,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2022-12-13 15:38:54,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500423957] [2022-12-13 15:38:54,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:38:54,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:38:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:38:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1301, Unknown=6, NotChecked=0, Total=1406 [2022-12-13 15:38:58,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:38:58,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 465 transitions, 9157 flow. Second operand has 38 states, 38 states have (on average 79.55263157894737) internal successors, (3023), 38 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:58,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:38:58,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:38:58,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:04,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:39:10,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:39:13,863 INFO L130 PetriNetUnfolder]: 1693/3318 cut-off events. [2022-12-13 15:39:13,863 INFO L131 PetriNetUnfolder]: For 50258/50258 co-relation queries the response was YES. [2022-12-13 15:39:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25453 conditions, 3318 events. 1693/3318 cut-off events. For 50258/50258 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22792 event pairs, 118 based on Foata normal form. 2/3319 useless extension candidates. Maximal degree in co-relation 25377. Up to 886 conditions per place. [2022-12-13 15:39:13,884 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 230 selfloop transitions, 315 changer transitions 54/599 dead transitions. [2022-12-13 15:39:13,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 599 transitions, 11640 flow [2022-12-13 15:39:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 15:39:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 15:39:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2890 transitions. [2022-12-13 15:39:13,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2818137493905412 [2022-12-13 15:39:13,887 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2890 transitions. [2022-12-13 15:39:13,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2890 transitions. [2022-12-13 15:39:13,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:13,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2890 transitions. [2022-12-13 15:39:13,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 82.57142857142857) internal successors, (2890), 35 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:13,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 293.0) internal successors, (10548), 36 states have internal predecessors, (10548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:13,894 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 293.0) internal successors, (10548), 36 states have internal predecessors, (10548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:13,894 INFO L175 Difference]: Start difference. First operand has 252 places, 465 transitions, 9157 flow. Second operand 35 states and 2890 transitions. [2022-12-13 15:39:13,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 599 transitions, 11640 flow [2022-12-13 15:39:14,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 599 transitions, 11262 flow, removed 12 selfloop flow, removed 15 redundant places. [2022-12-13 15:39:14,190 INFO L231 Difference]: Finished difference. Result has 273 places, 482 transitions, 9813 flow [2022-12-13 15:39:14,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=8826, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9813, PETRI_PLACES=273, PETRI_TRANSITIONS=482} [2022-12-13 15:39:14,191 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2022-12-13 15:39:14,191 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 482 transitions, 9813 flow [2022-12-13 15:39:14,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.55263157894737) internal successors, (3023), 38 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:14,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:14,192 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:14,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 15:39:14,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:14,393 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1612711072, now seen corresponding path program 22 times [2022-12-13 15:39:14,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:14,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677259405] [2022-12-13 15:39:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:15,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677259405] [2022-12-13 15:39:15,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677259405] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:15,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425192320] [2022-12-13 15:39:15,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:39:15,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:15,498 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:15,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 15:39:15,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:39:15,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-13 15:39:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:16,272 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-12-13 15:39:16,273 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 46 treesize of output 24 [2022-12-13 15:39:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:16,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:17,338 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 15:39:17,338 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 89 treesize of output 91 [2022-12-13 15:39:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:18,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425192320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:18,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:18,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 15:39:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538110652] [2022-12-13 15:39:18,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:18,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 15:39:18,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 15:39:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 15:39:22,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 293 [2022-12-13 15:39:22,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 482 transitions, 9813 flow. Second operand has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:22,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:22,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 293 [2022-12-13 15:39:22,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:30,322 INFO L130 PetriNetUnfolder]: 1651/3249 cut-off events. [2022-12-13 15:39:30,322 INFO L131 PetriNetUnfolder]: For 50806/50806 co-relation queries the response was YES. [2022-12-13 15:39:30,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25643 conditions, 3249 events. 1651/3249 cut-off events. For 50806/50806 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22171 event pairs, 578 based on Foata normal form. 9/3258 useless extension candidates. Maximal degree in co-relation 25564. Up to 2528 conditions per place. [2022-12-13 15:39:30,343 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 453 selfloop transitions, 120 changer transitions 17/590 dead transitions. [2022-12-13 15:39:30,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 590 transitions, 11785 flow [2022-12-13 15:39:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:39:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 15:39:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3321 transitions. [2022-12-13 15:39:30,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34346881787154826 [2022-12-13 15:39:30,347 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3321 transitions. [2022-12-13 15:39:30,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3321 transitions. [2022-12-13 15:39:30,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:30,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3321 transitions. [2022-12-13 15:39:30,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 100.63636363636364) internal successors, (3321), 33 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:30,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:30,354 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 293.0) internal successors, (9962), 34 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:30,355 INFO L175 Difference]: Start difference. First operand has 273 places, 482 transitions, 9813 flow. Second operand 33 states and 3321 transitions. [2022-12-13 15:39:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 590 transitions, 11785 flow [2022-12-13 15:39:30,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 590 transitions, 11381 flow, removed 67 selfloop flow, removed 22 redundant places. [2022-12-13 15:39:30,670 INFO L231 Difference]: Finished difference. Result has 283 places, 504 transitions, 10046 flow [2022-12-13 15:39:30,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=9448, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10046, PETRI_PLACES=283, PETRI_TRANSITIONS=504} [2022-12-13 15:39:30,671 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2022-12-13 15:39:30,671 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 504 transitions, 10046 flow [2022-12-13 15:39:30,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:30,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:30,672 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:30,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 15:39:30,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 15:39:30,873 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash -576967860, now seen corresponding path program 23 times [2022-12-13 15:39:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:30,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189208437] [2022-12-13 15:39:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:30,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:32,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189208437] [2022-12-13 15:39:32,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189208437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475089631] [2022-12-13 15:39:32,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:39:32,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:32,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:32,478 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:32,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 15:39:32,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:39:32,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 15:39:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:32,628 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 16 treesize of output 12 [2022-12-13 15:39:32,690 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 16 treesize of output 12 [2022-12-13 15:39:32,757 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 15 treesize of output 11 [2022-12-13 15:39:32,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:39:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:39:33,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 15:39:33,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:33,585 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 48 treesize of output 12 [2022-12-13 15:39:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:33,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:36,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:36,318 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 3 case distinctions, treesize of input 181 treesize of output 107 [2022-12-13 15:39:36,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:36,346 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 416 treesize of output 408 [2022-12-13 15:39:36,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:36,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 332 treesize of output 278 [2022-12-13 15:39:36,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:36,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 276 treesize of output 282 [2022-12-13 15:39:37,094 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-12-13 15:39:37,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 1 [2022-12-13 15:39:37,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:37,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 73 [2022-12-13 15:39:37,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:39:37,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:37,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2022-12-13 15:39:37,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:37,124 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 50 treesize of output 37 [2022-12-13 15:39:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:37,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475089631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:37,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:37,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-13 15:39:37,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002133466] [2022-12-13 15:39:37,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:39:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:39:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1686, Unknown=8, NotChecked=0, Total=1892 [2022-12-13 15:39:37,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 293 [2022-12-13 15:39:37,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 504 transitions, 10046 flow. Second operand has 44 states, 44 states have (on average 76.43181818181819) internal successors, (3363), 44 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:37,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:37,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 293 [2022-12-13 15:39:37,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:39:50,312 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse15 (* 4 c_~q_back~0))) (let ((.cse14 (* c_~q_front~0 4)) (.cse13 (forall ((~C~0 Int)) (let ((.cse21 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse21) 4294967296) (mod (+ c_~y~0 .cse21) 4294967296))))) (.cse4 (+ c_~q~0.offset .cse15 4)) (.cse20 (+ c_~q_front~0 1)) (.cse19 (div c_~x~0 4294967296)) (.cse18 (div c_~y~0 4294967296))) (let ((.cse11 (* .cse18 4294967296)) (.cse12 (+ (* .cse19 4294967296) c_~y~0)) (.cse0 (< .cse20 0)) (.cse7 (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset .cse15)) 1))) (.cse8 (<= c_~n~0 .cse20)) (.cse9 (< c_~q_back~0 0)) (.cse5 (or .cse13 (forall ((v_ArrVal_1053 (Array Int Int))) (not (= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1053) c_~q~0.base) .cse4)))))) (.cse2 (+ .cse14 c_~q~0.offset)) (.cse3 (+ .cse14 c_~q~0.offset 4)) (.cse10 (< c_~n~0 (+ 3 c_~q_back~0)))) (and (<= c_~N~0 c_~s~0) (or .cse0 (and (forall ((v_ArrVal_1053 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1053) c_~q~0.base))) (or (< 1 (+ (select .cse1 .cse2) (select .cse1 .cse3))) (not (= 1 (select .cse1 .cse4)))))) .cse5 (forall ((v_ArrVal_1053 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1053) c_~q~0.base))) (or (< (+ (select .cse6 .cse2) (select .cse6 .cse3)) 3) (not (= 1 (select .cse6 .cse4))))))) .cse7 .cse8 .cse9 .cse10) (not (<= (+ .cse11 c_~x~0 1) .cse12)) (<= (+ .cse11 c_~x~0) .cse12) (or .cse0 .cse8 .cse9 (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse10 (and .cse13 (= .cse14 .cse15) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))) (or .cse0 .cse7 .cse8 .cse9 (and .cse5 (forall ((v_ArrVal_1053 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1053) c_~q~0.base))) (or (< (+ (select .cse16 .cse2) (select .cse16 .cse3)) (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|)) (not (= 1 (select .cse16 .cse4)))))) (forall ((v_ArrVal_1053 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1053) c_~q~0.base))) (or (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) (+ (select .cse17 .cse2) (select .cse17 .cse3))) (not (= 1 (select .cse17 .cse4))))))) .cse10) (not (<= (+ .cse18 1) .cse19)) (< c_~s~0 (+ c_~N~0 1)))))) is different from false [2022-12-13 15:39:51,646 INFO L130 PetriNetUnfolder]: 1650/3268 cut-off events. [2022-12-13 15:39:51,646 INFO L131 PetriNetUnfolder]: For 49793/49793 co-relation queries the response was YES. [2022-12-13 15:39:51,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25456 conditions, 3268 events. 1650/3268 cut-off events. For 49793/49793 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22596 event pairs, 441 based on Foata normal form. 4/3271 useless extension candidates. Maximal degree in co-relation 25374. Up to 2453 conditions per place. [2022-12-13 15:39:51,668 INFO L137 encePairwiseOnDemand]: 278/293 looper letters, 407 selfloop transitions, 177 changer transitions 49/633 dead transitions. [2022-12-13 15:39:51,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 633 transitions, 12306 flow [2022-12-13 15:39:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 15:39:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 15:39:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3259 transitions. [2022-12-13 15:39:51,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2712894364438525 [2022-12-13 15:39:51,671 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3259 transitions. [2022-12-13 15:39:51,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3259 transitions. [2022-12-13 15:39:51,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:39:51,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3259 transitions. [2022-12-13 15:39:51,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 79.48780487804878) internal successors, (3259), 41 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:51,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 293.0) internal successors, (12306), 42 states have internal predecessors, (12306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:51,680 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 293.0) internal successors, (12306), 42 states have internal predecessors, (12306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:51,680 INFO L175 Difference]: Start difference. First operand has 283 places, 504 transitions, 10046 flow. Second operand 41 states and 3259 transitions. [2022-12-13 15:39:51,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 633 transitions, 12306 flow [2022-12-13 15:39:51,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 633 transitions, 12207 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-12-13 15:39:51,987 INFO L231 Difference]: Finished difference. Result has 320 places, 520 transitions, 10789 flow [2022-12-13 15:39:51,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=9953, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10789, PETRI_PLACES=320, PETRI_TRANSITIONS=520} [2022-12-13 15:39:51,988 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2022-12-13 15:39:51,988 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 520 transitions, 10789 flow [2022-12-13 15:39:51,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.43181818181819) internal successors, (3363), 44 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:51,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:39:51,988 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:39:51,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 15:39:52,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 15:39:52,189 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:39:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:39:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash -616996026, now seen corresponding path program 24 times [2022-12-13 15:39:52,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:39:52,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658679024] [2022-12-13 15:39:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:39:52,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:39:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:39:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:39:53,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:39:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658679024] [2022-12-13 15:39:53,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658679024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:39:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256153271] [2022-12-13 15:39:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:39:53,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:39:53,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:39:53,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:39:53,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 15:39:53,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:39:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:39:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 15:39:53,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:39:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:39:53,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:39:54,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:54,108 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 48 treesize of output 12 [2022-12-13 15:39:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:39:54,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:39:55,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:55,189 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 148 treesize of output 157 [2022-12-13 15:39:55,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:39:55,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 100 treesize of output 107 [2022-12-13 15:39:55,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-12-13 15:39:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:39:56,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256153271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:39:56,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:39:56,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2022-12-13 15:39:56,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378506195] [2022-12-13 15:39:56,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:39:56,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:39:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:39:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:39:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1443, Unknown=4, NotChecked=0, Total=1560 [2022-12-13 15:39:59,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:39:59,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 520 transitions, 10789 flow. Second operand has 40 states, 40 states have (on average 79.525) internal successors, (3181), 40 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:59,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:59,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:39:59,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:17,532 INFO L130 PetriNetUnfolder]: 1624/3223 cut-off events. [2022-12-13 15:40:17,532 INFO L131 PetriNetUnfolder]: For 53344/53344 co-relation queries the response was YES. [2022-12-13 15:40:17,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27086 conditions, 3223 events. 1624/3223 cut-off events. For 53344/53344 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22137 event pairs, 134 based on Foata normal form. 2/3224 useless extension candidates. Maximal degree in co-relation 26991. Up to 935 conditions per place. [2022-12-13 15:40:17,557 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 265 selfloop transitions, 354 changer transitions 19/638 dead transitions. [2022-12-13 15:40:17,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 638 transitions, 13020 flow [2022-12-13 15:40:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 15:40:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 15:40:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3455 transitions. [2022-12-13 15:40:17,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28075735413619374 [2022-12-13 15:40:17,567 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3455 transitions. [2022-12-13 15:40:17,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3455 transitions. [2022-12-13 15:40:17,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:17,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3455 transitions. [2022-12-13 15:40:17,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 82.26190476190476) internal successors, (3455), 42 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 293.0) internal successors, (12599), 43 states have internal predecessors, (12599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,575 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 293.0) internal successors, (12599), 43 states have internal predecessors, (12599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,575 INFO L175 Difference]: Start difference. First operand has 320 places, 520 transitions, 10789 flow. Second operand 42 states and 3455 transitions. [2022-12-13 15:40:17,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 638 transitions, 13020 flow [2022-12-13 15:40:17,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 638 transitions, 12697 flow, removed 68 selfloop flow, removed 24 redundant places. [2022-12-13 15:40:17,931 INFO L231 Difference]: Finished difference. Result has 333 places, 538 transitions, 11595 flow [2022-12-13 15:40:17,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=10503, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11595, PETRI_PLACES=333, PETRI_TRANSITIONS=538} [2022-12-13 15:40:17,932 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2022-12-13 15:40:17,932 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 538 transitions, 11595 flow [2022-12-13 15:40:17,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 79.525) internal successors, (3181), 40 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:17,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:17,932 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:17,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 15:40:18,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:18,133 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1659533542, now seen corresponding path program 25 times [2022-12-13 15:40:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:18,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104515660] [2022-12-13 15:40:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:18,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:19,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104515660] [2022-12-13 15:40:19,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104515660] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70830743] [2022-12-13 15:40:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:40:19,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:19,630 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:19,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 15:40:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:19,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-13 15:40:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:20,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:20,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 12 [2022-12-13 15:40:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:20,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:21,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:21,442 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 64 treesize of output 82 [2022-12-13 15:40:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70830743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:22,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:22,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2022-12-13 15:40:22,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236231834] [2022-12-13 15:40:22,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:22,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 15:40:22,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 15:40:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 15:40:27,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 293 [2022-12-13 15:40:27,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 538 transitions, 11595 flow. Second operand has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:27,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:27,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 293 [2022-12-13 15:40:27,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:33,126 INFO L130 PetriNetUnfolder]: 1644/3261 cut-off events. [2022-12-13 15:40:33,126 INFO L131 PetriNetUnfolder]: For 59127/59127 co-relation queries the response was YES. [2022-12-13 15:40:33,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28128 conditions, 3261 events. 1644/3261 cut-off events. For 59127/59127 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22473 event pairs, 200 based on Foata normal form. 2/3263 useless extension candidates. Maximal degree in co-relation 28030. Up to 947 conditions per place. [2022-12-13 15:40:33,151 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 292 selfloop transitions, 312 changer transitions 30/634 dead transitions. [2022-12-13 15:40:33,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 634 transitions, 13603 flow [2022-12-13 15:40:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 15:40:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 15:40:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3415 transitions. [2022-12-13 15:40:33,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3237580583996966 [2022-12-13 15:40:33,154 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3415 transitions. [2022-12-13 15:40:33,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3415 transitions. [2022-12-13 15:40:33,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:33,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3415 transitions. [2022-12-13 15:40:33,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 94.86111111111111) internal successors, (3415), 36 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:33,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 293.0) internal successors, (10841), 37 states have internal predecessors, (10841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:33,161 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 293.0) internal successors, (10841), 37 states have internal predecessors, (10841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:33,161 INFO L175 Difference]: Start difference. First operand has 333 places, 538 transitions, 11595 flow. Second operand 36 states and 3415 transitions. [2022-12-13 15:40:33,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 634 transitions, 13603 flow [2022-12-13 15:40:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 634 transitions, 13331 flow, removed 43 selfloop flow, removed 19 redundant places. [2022-12-13 15:40:33,539 INFO L231 Difference]: Finished difference. Result has 350 places, 539 transitions, 11977 flow [2022-12-13 15:40:33,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=11358, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11977, PETRI_PLACES=350, PETRI_TRANSITIONS=539} [2022-12-13 15:40:33,539 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 329 predicate places. [2022-12-13 15:40:33,540 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 539 transitions, 11977 flow [2022-12-13 15:40:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:33,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:33,540 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:33,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 15:40:33,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:33,742 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1090592944, now seen corresponding path program 26 times [2022-12-13 15:40:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:33,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376368266] [2022-12-13 15:40:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:35,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376368266] [2022-12-13 15:40:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376368266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384471541] [2022-12-13 15:40:35,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:40:35,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:35,074 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:35,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 15:40:35,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:40:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 15:40:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:35,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:40:35,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 15:40:35,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:35,840 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 48 treesize of output 12 [2022-12-13 15:40:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:40:35,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:36,645 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse2 (+ .cse5 c_~q~0.offset)) (.cse3 (+ .cse5 c_~q~0.offset 4))) (and (or (forall ((v_ArrVal_1169 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1169) c_~q~0.base) .cse0) 1))) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296))) (forall ((v_ArrVal_1169 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1169) c_~q~0.base))) (or (not (= (select .cse1 .cse0) 1)) (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ (select .cse1 .cse2) (select .cse1 .cse3)))))) (forall ((v_ArrVal_1169 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1169) c_~q~0.base))) (or (not (= (select .cse4 .cse0) 1)) (< (+ (select .cse4 .cse2) (select .cse4 .cse3)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|)))))))) is different from false [2022-12-13 15:40:36,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:36,685 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 240 treesize of output 223 [2022-12-13 15:40:36,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:36,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 166 treesize of output 173 [2022-12-13 15:40:36,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:36,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 146 treesize of output 153 [2022-12-13 15:40:36,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 119 [2022-12-13 15:40:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:40:37,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384471541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:37,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:37,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2022-12-13 15:40:37,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592973320] [2022-12-13 15:40:37,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:37,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:40:37,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:40:37,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1370, Unknown=1, NotChecked=74, Total=1560 [2022-12-13 15:40:38,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:40:38,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 539 transitions, 11977 flow. Second operand has 40 states, 40 states have (on average 79.525) internal successors, (3181), 40 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:38,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:38,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:40:38,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:41,617 INFO L130 PetriNetUnfolder]: 1631/3234 cut-off events. [2022-12-13 15:40:41,617 INFO L131 PetriNetUnfolder]: For 62012/62012 co-relation queries the response was YES. [2022-12-13 15:40:41,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28642 conditions, 3234 events. 1631/3234 cut-off events. For 62012/62012 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22206 event pairs, 294 based on Foata normal form. 2/3235 useless extension candidates. Maximal degree in co-relation 28542. Up to 2599 conditions per place. [2022-12-13 15:40:41,654 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 385 selfloop transitions, 184 changer transitions 27/596 dead transitions. [2022-12-13 15:40:41,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 596 transitions, 13518 flow [2022-12-13 15:40:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:40:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 15:40:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2226 transitions. [2022-12-13 15:40:41,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2813803564656807 [2022-12-13 15:40:41,657 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2226 transitions. [2022-12-13 15:40:41,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2226 transitions. [2022-12-13 15:40:41,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:41,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2226 transitions. [2022-12-13 15:40:41,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 82.44444444444444) internal successors, (2226), 27 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:41,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 293.0) internal successors, (8204), 28 states have internal predecessors, (8204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:41,662 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 293.0) internal successors, (8204), 28 states have internal predecessors, (8204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:41,662 INFO L175 Difference]: Start difference. First operand has 350 places, 539 transitions, 11977 flow. Second operand 27 states and 2226 transitions. [2022-12-13 15:40:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 596 transitions, 13518 flow [2022-12-13 15:40:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 596 transitions, 13389 flow, removed 8 selfloop flow, removed 20 redundant places. [2022-12-13 15:40:42,052 INFO L231 Difference]: Finished difference. Result has 352 places, 533 transitions, 12099 flow [2022-12-13 15:40:42,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=11843, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12099, PETRI_PLACES=352, PETRI_TRANSITIONS=533} [2022-12-13 15:40:42,053 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2022-12-13 15:40:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 533 transitions, 12099 flow [2022-12-13 15:40:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 79.525) internal successors, (3181), 40 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:42,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:42,053 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:42,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 15:40:42,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:40:42,255 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2110514632, now seen corresponding path program 27 times [2022-12-13 15:40:42,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:42,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446345684] [2022-12-13 15:40:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:42,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:43,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446345684] [2022-12-13 15:40:43,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446345684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:43,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529642299] [2022-12-13 15:40:43,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:40:43,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:43,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:43,460 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:43,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 15:40:43,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:40:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:43,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:40:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:44,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:44,216 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 46 treesize of output 12 [2022-12-13 15:40:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:40:44,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:44,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:40:44,977 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 101 treesize of output 94 [2022-12-13 15:40:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:40:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529642299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:45,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:45,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2022-12-13 15:40:45,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424620363] [2022-12-13 15:40:45,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:45,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:40:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:40:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 15:40:50,221 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 293 [2022-12-13 15:40:50,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 533 transitions, 12099 flow. Second operand has 33 states, 33 states have (on average 99.78787878787878) internal successors, (3293), 33 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:50,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:40:50,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 293 [2022-12-13 15:40:50,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:40:53,066 INFO L130 PetriNetUnfolder]: 1661/3294 cut-off events. [2022-12-13 15:40:53,066 INFO L131 PetriNetUnfolder]: For 63805/63805 co-relation queries the response was YES. [2022-12-13 15:40:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29636 conditions, 3294 events. 1661/3294 cut-off events. For 63805/63805 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22703 event pairs, 474 based on Foata normal form. 2/3295 useless extension candidates. Maximal degree in co-relation 29535. Up to 2888 conditions per place. [2022-12-13 15:40:53,091 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 444 selfloop transitions, 118 changer transitions 37/599 dead transitions. [2022-12-13 15:40:53,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 599 transitions, 14052 flow [2022-12-13 15:40:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:40:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:40:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2451 transitions. [2022-12-13 15:40:53,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3485494880546075 [2022-12-13 15:40:53,094 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2451 transitions. [2022-12-13 15:40:53,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2451 transitions. [2022-12-13 15:40:53,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:40:53,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2451 transitions. [2022-12-13 15:40:53,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.125) internal successors, (2451), 24 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:53,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 293.0) internal successors, (7325), 25 states have internal predecessors, (7325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:53,099 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 293.0) internal successors, (7325), 25 states have internal predecessors, (7325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:53,099 INFO L175 Difference]: Start difference. First operand has 352 places, 533 transitions, 12099 flow. Second operand 24 states and 2451 transitions. [2022-12-13 15:40:53,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 599 transitions, 14052 flow [2022-12-13 15:40:53,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 599 transitions, 13636 flow, removed 8 selfloop flow, removed 27 redundant places. [2022-12-13 15:40:53,463 INFO L231 Difference]: Finished difference. Result has 349 places, 542 transitions, 12200 flow [2022-12-13 15:40:53,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=11711, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12200, PETRI_PLACES=349, PETRI_TRANSITIONS=542} [2022-12-13 15:40:53,463 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 328 predicate places. [2022-12-13 15:40:53,463 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 542 transitions, 12200 flow [2022-12-13 15:40:53,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 99.78787878787878) internal successors, (3293), 33 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:40:53,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:40:53,464 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:40:53,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 15:40:53,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 15:40:53,665 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:40:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:40:53,666 INFO L85 PathProgramCache]: Analyzing trace with hash 470882562, now seen corresponding path program 28 times [2022-12-13 15:40:53,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:40:53,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903485533] [2022-12-13 15:40:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:40:53,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:40:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:40:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:54,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:40:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903485533] [2022-12-13 15:40:54,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903485533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:40:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978612910] [2022-12-13 15:40:54,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:40:54,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:40:54,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:40:54,925 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:40:54,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 15:40:55,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:40:55,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:40:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-13 15:40:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:40:55,923 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-12-13 15:40:55,923 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 46 treesize of output 15 [2022-12-13 15:40:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:56,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:40:57,021 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 15:40:57,021 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 100 treesize of output 94 [2022-12-13 15:40:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:40:58,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978612910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:40:58,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:40:58,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 15:40:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636213016] [2022-12-13 15:40:58,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:40:58,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 15:40:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:40:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 15:40:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 15:41:04,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 293 [2022-12-13 15:41:04,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 542 transitions, 12200 flow. Second operand has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:04,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:04,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 293 [2022-12-13 15:41:04,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:19,281 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 85 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:41:20,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:41:21,640 INFO L130 PetriNetUnfolder]: 1638/3242 cut-off events. [2022-12-13 15:41:21,640 INFO L131 PetriNetUnfolder]: For 63565/63565 co-relation queries the response was YES. [2022-12-13 15:41:21,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29032 conditions, 3242 events. 1638/3242 cut-off events. For 63565/63565 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22234 event pairs, 552 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 28927. Up to 2544 conditions per place. [2022-12-13 15:41:21,665 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 458 selfloop transitions, 119 changer transitions 17/594 dead transitions. [2022-12-13 15:41:21,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 594 transitions, 13844 flow [2022-12-13 15:41:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:41:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:41:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2116 transitions. [2022-12-13 15:41:21,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34389728587680807 [2022-12-13 15:41:21,668 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2116 transitions. [2022-12-13 15:41:21,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2116 transitions. [2022-12-13 15:41:21,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:21,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2116 transitions. [2022-12-13 15:41:21,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 100.76190476190476) internal successors, (2116), 21 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:21,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 293.0) internal successors, (6446), 22 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:21,672 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 293.0) internal successors, (6446), 22 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:21,672 INFO L175 Difference]: Start difference. First operand has 349 places, 542 transitions, 12200 flow. Second operand 21 states and 2116 transitions. [2022-12-13 15:41:21,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 594 transitions, 13844 flow [2022-12-13 15:41:22,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 594 transitions, 13546 flow, removed 20 selfloop flow, removed 21 redundant places. [2022-12-13 15:41:22,040 INFO L231 Difference]: Finished difference. Result has 345 places, 549 transitions, 12404 flow [2022-12-13 15:41:22,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=11906, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12404, PETRI_PLACES=345, PETRI_TRANSITIONS=549} [2022-12-13 15:41:22,040 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 324 predicate places. [2022-12-13 15:41:22,040 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 549 transitions, 12404 flow [2022-12-13 15:41:22,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:22,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:22,041 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:22,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 15:41:22,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:22,242 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash -551840120, now seen corresponding path program 29 times [2022-12-13 15:41:22,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082351908] [2022-12-13 15:41:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:22,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:23,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082351908] [2022-12-13 15:41:23,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082351908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198881138] [2022-12-13 15:41:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:41:23,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:23,251 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:23,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 15:41:23,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:41:23,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 15:41:23,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:23,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:23,778 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 59 treesize of output 16 [2022-12-13 15:41:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:41:24,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:24,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:24,861 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 121 treesize of output 105 [2022-12-13 15:41:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:41:25,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198881138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:25,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:25,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2022-12-13 15:41:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139157018] [2022-12-13 15:41:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:41:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:41:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 15:41:29,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 293 [2022-12-13 15:41:29,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 549 transitions, 12404 flow. Second operand has 34 states, 34 states have (on average 98.73529411764706) internal successors, (3357), 34 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:29,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:29,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 293 [2022-12-13 15:41:29,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:32,572 INFO L130 PetriNetUnfolder]: 1652/3265 cut-off events. [2022-12-13 15:41:32,572 INFO L131 PetriNetUnfolder]: For 62687/62687 co-relation queries the response was YES. [2022-12-13 15:41:32,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29263 conditions, 3265 events. 1652/3265 cut-off events. For 62687/62687 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22382 event pairs, 409 based on Foata normal form. 2/3266 useless extension candidates. Maximal degree in co-relation 29161. Up to 2890 conditions per place. [2022-12-13 15:41:32,597 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 451 selfloop transitions, 128 changer transitions 18/597 dead transitions. [2022-12-13 15:41:32,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 597 transitions, 13973 flow [2022-12-13 15:41:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 15:41:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 15:41:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2523 transitions. [2022-12-13 15:41:32,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3444368600682594 [2022-12-13 15:41:32,609 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2523 transitions. [2022-12-13 15:41:32,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2523 transitions. [2022-12-13 15:41:32,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:32,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2523 transitions. [2022-12-13 15:41:32,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 100.92) internal successors, (2523), 25 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:32,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 293.0) internal successors, (7618), 26 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:32,614 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 293.0) internal successors, (7618), 26 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:32,614 INFO L175 Difference]: Start difference. First operand has 345 places, 549 transitions, 12404 flow. Second operand 25 states and 2523 transitions. [2022-12-13 15:41:32,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 597 transitions, 13973 flow [2022-12-13 15:41:32,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 597 transitions, 13889 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-12-13 15:41:33,005 INFO L231 Difference]: Finished difference. Result has 357 places, 555 transitions, 12704 flow [2022-12-13 15:41:33,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=12320, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12704, PETRI_PLACES=357, PETRI_TRANSITIONS=555} [2022-12-13 15:41:33,006 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 336 predicate places. [2022-12-13 15:41:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 555 transitions, 12704 flow [2022-12-13 15:41:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 98.73529411764706) internal successors, (3357), 34 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:33,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:33,006 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:33,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 15:41:33,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 15:41:33,208 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1979263720, now seen corresponding path program 30 times [2022-12-13 15:41:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:33,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136210293] [2022-12-13 15:41:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:34,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:34,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136210293] [2022-12-13 15:41:34,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136210293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:34,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823749553] [2022-12-13 15:41:34,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:41:34,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:34,277 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:34,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 15:41:34,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:41:34,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:41:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:35,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:35,126 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 46 treesize of output 12 [2022-12-13 15:41:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:41:35,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:35,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:35,967 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 64 treesize of output 82 [2022-12-13 15:41:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:41:36,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823749553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:36,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:36,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2022-12-13 15:41:36,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190687801] [2022-12-13 15:41:36,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:36,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:41:36,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:41:36,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 15:41:42,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 293 [2022-12-13 15:41:42,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 555 transitions, 12704 flow. Second operand has 37 states, 37 states have (on average 98.64864864864865) internal successors, (3650), 37 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:42,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:41:42,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 293 [2022-12-13 15:41:42,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:41:54,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:41:55,587 INFO L130 PetriNetUnfolder]: 1731/3450 cut-off events. [2022-12-13 15:41:55,587 INFO L131 PetriNetUnfolder]: For 66969/66969 co-relation queries the response was YES. [2022-12-13 15:41:55,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 3450 events. 1731/3450 cut-off events. For 66969/66969 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24214 event pairs, 251 based on Foata normal form. 4/3453 useless extension candidates. Maximal degree in co-relation 31018. Up to 1131 conditions per place. [2022-12-13 15:41:55,613 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 312 selfloop transitions, 326 changer transitions 44/682 dead transitions. [2022-12-13 15:41:55,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 682 transitions, 15600 flow [2022-12-13 15:41:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 15:41:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 15:41:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4148 transitions. [2022-12-13 15:41:55,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34529259968367604 [2022-12-13 15:41:55,617 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4148 transitions. [2022-12-13 15:41:55,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4148 transitions. [2022-12-13 15:41:55,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:41:55,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4148 transitions. [2022-12-13 15:41:55,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 101.17073170731707) internal successors, (4148), 41 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:55,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 293.0) internal successors, (12306), 42 states have internal predecessors, (12306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:55,631 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 293.0) internal successors, (12306), 42 states have internal predecessors, (12306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:55,631 INFO L175 Difference]: Start difference. First operand has 357 places, 555 transitions, 12704 flow. Second operand 41 states and 4148 transitions. [2022-12-13 15:41:55,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 682 transitions, 15600 flow [2022-12-13 15:41:56,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 682 transitions, 15234 flow, removed 29 selfloop flow, removed 21 redundant places. [2022-12-13 15:41:56,085 INFO L231 Difference]: Finished difference. Result has 382 places, 584 transitions, 13810 flow [2022-12-13 15:41:56,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=12350, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13810, PETRI_PLACES=382, PETRI_TRANSITIONS=584} [2022-12-13 15:41:56,085 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2022-12-13 15:41:56,086 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 584 transitions, 13810 flow [2022-12-13 15:41:56,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.64864864864865) internal successors, (3650), 37 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:56,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:41:56,086 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:56,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 15:41:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 15:41:56,288 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:41:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:56,289 INFO L85 PathProgramCache]: Analyzing trace with hash 522108300, now seen corresponding path program 31 times [2022-12-13 15:41:56,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:56,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883355823] [2022-12-13 15:41:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:56,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:57,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:57,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883355823] [2022-12-13 15:41:57,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883355823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:57,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153663685] [2022-12-13 15:41:57,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:41:57,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:57,504 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:57,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 15:41:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 15:41:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:41:57,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 15:41:58,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:58,154 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 46 treesize of output 12 [2022-12-13 15:41:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:41:58,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:59,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:59,226 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 100 treesize of output 118 [2022-12-13 15:41:59,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:59,235 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 57 treesize of output 44 [2022-12-13 15:41:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:41:59,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153663685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:59,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:59,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 37 [2022-12-13 15:41:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069124939] [2022-12-13 15:41:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 15:41:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 15:41:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1367, Unknown=5, NotChecked=0, Total=1482 [2022-12-13 15:42:04,071 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 293 [2022-12-13 15:42:04,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 584 transitions, 13810 flow. Second operand has 39 states, 39 states have (on average 79.48717948717949) internal successors, (3100), 39 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:04,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:04,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 293 [2022-12-13 15:42:04,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:14,698 INFO L130 PetriNetUnfolder]: 1701/3376 cut-off events. [2022-12-13 15:42:14,698 INFO L131 PetriNetUnfolder]: For 74821/74821 co-relation queries the response was YES. [2022-12-13 15:42:14,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31537 conditions, 3376 events. 1701/3376 cut-off events. For 74821/74821 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23495 event pairs, 137 based on Foata normal form. 2/3378 useless extension candidates. Maximal degree in co-relation 31428. Up to 979 conditions per place. [2022-12-13 15:42:14,725 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 288 selfloop transitions, 325 changer transitions 56/669 dead transitions. [2022-12-13 15:42:14,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 669 transitions, 15884 flow [2022-12-13 15:42:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 15:42:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 15:42:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2404 transitions. [2022-12-13 15:42:14,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28292338472402023 [2022-12-13 15:42:14,728 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2404 transitions. [2022-12-13 15:42:14,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2404 transitions. [2022-12-13 15:42:14,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:14,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2404 transitions. [2022-12-13 15:42:14,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 82.89655172413794) internal successors, (2404), 29 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:14,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 293.0) internal successors, (8790), 30 states have internal predecessors, (8790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:14,733 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 293.0) internal successors, (8790), 30 states have internal predecessors, (8790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:14,733 INFO L175 Difference]: Start difference. First operand has 382 places, 584 transitions, 13810 flow. Second operand 29 states and 2404 transitions. [2022-12-13 15:42:14,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 669 transitions, 15884 flow [2022-12-13 15:42:15,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 669 transitions, 15158 flow, removed 130 selfloop flow, removed 29 redundant places. [2022-12-13 15:42:15,254 INFO L231 Difference]: Finished difference. Result has 377 places, 568 transitions, 13492 flow [2022-12-13 15:42:15,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=13113, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13492, PETRI_PLACES=377, PETRI_TRANSITIONS=568} [2022-12-13 15:42:15,255 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 356 predicate places. [2022-12-13 15:42:15,255 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 568 transitions, 13492 flow [2022-12-13 15:42:15,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 79.48717948717949) internal successors, (3100), 39 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:15,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:42:15,256 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:15,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 15:42:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:42:15,457 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:42:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash -83163196, now seen corresponding path program 32 times [2022-12-13 15:42:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898402975] [2022-12-13 15:42:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:16,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898402975] [2022-12-13 15:42:16,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898402975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205337683] [2022-12-13 15:42:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:42:16,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:16,921 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:16,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 15:42:17,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:42:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:17,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 15:42:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:17,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:42:17,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:17,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 26 [2022-12-13 15:42:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:17,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:18,688 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 15:42:18,688 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 63 treesize of output 82 [2022-12-13 15:42:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:19,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205337683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:19,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:19,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2022-12-13 15:42:19,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86613827] [2022-12-13 15:42:19,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 15:42:19,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:19,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 15:42:19,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 15:42:26,071 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 293 [2022-12-13 15:42:26,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 568 transitions, 13492 flow. Second operand has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:26,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:42:26,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 293 [2022-12-13 15:42:26,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:42:58,829 INFO L130 PetriNetUnfolder]: 1677/3369 cut-off events. [2022-12-13 15:42:58,829 INFO L131 PetriNetUnfolder]: For 78385/78385 co-relation queries the response was YES. [2022-12-13 15:42:58,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32183 conditions, 3369 events. 1677/3369 cut-off events. For 78385/78385 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23684 event pairs, 349 based on Foata normal form. 19/3388 useless extension candidates. Maximal degree in co-relation 32074. Up to 1205 conditions per place. [2022-12-13 15:42:58,857 INFO L137 encePairwiseOnDemand]: 282/293 looper letters, 409 selfloop transitions, 268 changer transitions 54/731 dead transitions. [2022-12-13 15:42:58,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 731 transitions, 17101 flow [2022-12-13 15:42:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 15:42:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 15:42:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4539 transitions. [2022-12-13 15:42:58,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32273890784982934 [2022-12-13 15:42:58,861 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4539 transitions. [2022-12-13 15:42:58,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4539 transitions. [2022-12-13 15:42:58,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:42:58,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4539 transitions. [2022-12-13 15:42:58,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 94.5625) internal successors, (4539), 48 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:58,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 293.0) internal successors, (14357), 49 states have internal predecessors, (14357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:58,870 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 293.0) internal successors, (14357), 49 states have internal predecessors, (14357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:58,870 INFO L175 Difference]: Start difference. First operand has 377 places, 568 transitions, 13492 flow. Second operand 48 states and 4539 transitions. [2022-12-13 15:42:58,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 731 transitions, 17101 flow [2022-12-13 15:42:59,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 731 transitions, 16408 flow, removed 117 selfloop flow, removed 24 redundant places. [2022-12-13 15:42:59,392 INFO L231 Difference]: Finished difference. Result has 400 places, 599 transitions, 14442 flow [2022-12-13 15:42:59,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=13017, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=14442, PETRI_PLACES=400, PETRI_TRANSITIONS=599} [2022-12-13 15:42:59,393 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2022-12-13 15:42:59,393 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 599 transitions, 14442 flow [2022-12-13 15:42:59,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:59,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:42:59,393 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:59,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 15:42:59,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 15:42:59,595 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:42:59,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash -723033058, now seen corresponding path program 33 times [2022-12-13 15:42:59,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:59,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5845092] [2022-12-13 15:42:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:43:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:43:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:43:00,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5845092] [2022-12-13 15:43:00,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5845092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:43:00,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588499794] [2022-12-13 15:43:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:43:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:43:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:43:00,973 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:43:00,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 15:43:01,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:43:01,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:43:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-13 15:43:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:43:01,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 15:43:01,495 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 16 treesize of output 12 [2022-12-13 15:43:01,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 15:43:01,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:43:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:43:01,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-12-13 15:43:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:43:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:43:02,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:02,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 30 [2022-12-13 15:43:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:43:02,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:43:19,915 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:43:21,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:21,085 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 3 case distinctions, treesize of input 221 treesize of output 119 [2022-12-13 15:43:21,135 INFO L321 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-12-13 15:43:21,135 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 233 treesize of output 241 [2022-12-13 15:43:21,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:43:21,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 109 [2022-12-13 15:43:21,193 INFO L321 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-12-13 15:43:21,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 111 treesize of output 129 [2022-12-13 15:43:22,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:22,145 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 3 case distinctions, treesize of input 132 treesize of output 86 [2022-12-13 15:43:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:43:22,165 INFO L321 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2022-12-13 15:43:22,166 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 94 treesize of output 74 [2022-12-13 15:43:22,184 INFO L321 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2022-12-13 15:43:22,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 48 [2022-12-13 15:43:22,221 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-12-13 15:43:22,221 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 3 case distinctions, treesize of input 221 treesize of output 1 [2022-12-13 15:43:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:43:22,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588499794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:43:22,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:43:22,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-13 15:43:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036738678] [2022-12-13 15:43:22,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:43:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:43:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:43:22,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:43:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1630, Unknown=7, NotChecked=0, Total=1892 [2022-12-13 15:43:25,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:43:28,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:43:28,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 293 [2022-12-13 15:43:28,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 599 transitions, 14442 flow. Second operand has 44 states, 44 states have (on average 76.43181818181819) internal successors, (3363), 44 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:43:28,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:43:28,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 293 [2022-12-13 15:43:28,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:43:41,367 WARN L233 SmtUtils]: Spent 11.27s on a formula simplification. DAG size of input: 165 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:44:09,173 WARN L233 SmtUtils]: Spent 15.19s on a formula simplification. DAG size of input: 183 DAG size of output: 162 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:44:50,744 WARN L233 SmtUtils]: Spent 39.16s on a formula simplification. DAG size of input: 166 DAG size of output: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:45:09,221 WARN L233 SmtUtils]: Spent 16.98s on a formula simplification. DAG size of input: 175 DAG size of output: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:45:15,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:36,887 WARN L233 SmtUtils]: Spent 18.07s on a formula simplification. DAG size of input: 162 DAG size of output: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:45:39,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:41,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:43,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:45:44,972 INFO L130 PetriNetUnfolder]: 1677/3351 cut-off events. [2022-12-13 15:45:44,973 INFO L131 PetriNetUnfolder]: For 75241/75241 co-relation queries the response was YES. [2022-12-13 15:45:44,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31596 conditions, 3351 events. 1677/3351 cut-off events. For 75241/75241 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23391 event pairs, 562 based on Foata normal form. 7/3357 useless extension candidates. Maximal degree in co-relation 31482. Up to 2504 conditions per place. [2022-12-13 15:45:45,003 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 558 selfloop transitions, 124 changer transitions 15/697 dead transitions. [2022-12-13 15:45:45,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 697 transitions, 16926 flow [2022-12-13 15:45:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:45:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:45:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2545 transitions. [2022-12-13 15:45:45,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2714377133105802 [2022-12-13 15:45:45,006 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2545 transitions. [2022-12-13 15:45:45,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2545 transitions. [2022-12-13 15:45:45,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:45:45,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2545 transitions. [2022-12-13 15:45:45,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 79.53125) internal successors, (2545), 32 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:45,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 293.0) internal successors, (9669), 33 states have internal predecessors, (9669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:45,013 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 293.0) internal successors, (9669), 33 states have internal predecessors, (9669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:45,013 INFO L175 Difference]: Start difference. First operand has 400 places, 599 transitions, 14442 flow. Second operand 32 states and 2545 transitions. [2022-12-13 15:45:45,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 697 transitions, 16926 flow [2022-12-13 15:45:45,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 697 transitions, 16412 flow, removed 116 selfloop flow, removed 24 redundant places. [2022-12-13 15:45:45,575 INFO L231 Difference]: Finished difference. Result has 404 places, 622 transitions, 15009 flow [2022-12-13 15:45:45,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=13992, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15009, PETRI_PLACES=404, PETRI_TRANSITIONS=622} [2022-12-13 15:45:45,575 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 383 predicate places. [2022-12-13 15:45:45,575 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 622 transitions, 15009 flow [2022-12-13 15:45:45,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.43181818181819) internal successors, (3363), 44 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:45,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:45:45,576 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:45,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 15:45:45,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:45,778 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:45:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 299689624, now seen corresponding path program 34 times [2022-12-13 15:45:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:45,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515428856] [2022-12-13 15:45:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515428856] [2022-12-13 15:45:47,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515428856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:45:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234552939] [2022-12-13 15:45:47,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:45:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:47,295 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64998c85-d8bf-4f60-8ae2-95d9e297e716/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 15:45:47,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:45:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:45:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 15:45:47,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:47,525 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 15 treesize of output 11 [2022-12-13 15:45:47,589 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 15 treesize of output 11 [2022-12-13 15:45:47,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:45:47,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:45:47,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-12-13 15:45:48,644 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-12-13 15:45:48,645 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 46 treesize of output 15 [2022-12-13 15:45:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:50,057 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1)) (.cse1 (select |c_#memory_int| c_~q~0.base))) (or (< .cse0 0) (not (<= 0 c_~q_back~0)) (not (= (select .cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (not (< c_~q_back~0 c_~n~0)) (<= c_~n~0 .cse0) (forall ((v_~q_back~0_297 Int)) (or (not (= (select .cse1 (+ c_~q~0.offset (* v_~q_back~0_297 4))) 1)) (not (<= (+ c_~q_back~0 1) v_~q_back~0_297)) (< c_~n~0 (+ 2 v_~q_back~0_297)))) (let ((.cse7 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse7 c_~q~0.offset 4)) (.cse4 (+ .cse7 c_~q~0.offset))) (and (forall ((v_ArrVal_1488 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1488) c_~q~0.base))) (+ (select .cse2 .cse3) (select .cse2 .cse4))) (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|))) (forall ((~C~0 Int)) (let ((.cse5 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse5) 4294967296) (mod (+ c_~y~0 .cse5) 4294967296)))) (forall ((v_ArrVal_1488 (Array Int Int))) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1488) c_~q~0.base))) (+ (select .cse6 .cse3) (select .cse6 .cse4)))))))))) is different from false [2022-12-13 15:45:55,336 INFO L321 Elim1Store]: treesize reduction 60, result has 62.5 percent of original size [2022-12-13 15:45:55,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 337 [2022-12-13 15:45:55,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 671 treesize of output 648 [2022-12-13 15:45:55,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:55,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 648 treesize of output 718 [2022-12-13 15:45:55,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:55,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 590 treesize of output 617 [2022-12-13 15:45:55,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 552 treesize of output 500 [2022-12-13 15:45:55,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:55,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 520 treesize of output 590 [2022-12-13 15:45:55,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:55,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 462 treesize of output 489 [2022-12-13 15:45:55,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 424 treesize of output 372 [2022-12-13 15:45:55,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:55,838 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 428 treesize of output 440 [2022-12-13 15:45:55,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:45:55,896 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 390 treesize of output 391